presentation on global warming ignou

Introduction to Climate Change

In the backdrop of importance placed on creating awareness on climate change science and adaptation strategies by various ministries under the Government of India, the course is tailor-made to incorporate the developments in the domain of climate change concerning human influences on climate, the consequences of climate change, climate change conventions and protocols. 

The course covers fundamentals of climate change, the past and present climate, climate change indicators, international conventions on climate change and National Action Plan on Climate change. The objective of this course is to explain the science of climate change, and to explain the conventions on climate change.

The learners will be enriched with knowledge on the impact of climate change on terrestrial and aquatic ecosystems. The potential threats of climate change on sectors like agriculture, livestock and natural resources are covered extensively in the course.

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Course layout.

Course Status :	Completed
Course Type :	Not Applicable
Duration :	16 weeks
Category :
Credit Points :	4
Postgraduate
Start Date :	15 Aug 2022
End Date :
Exam Date :

Week	Module	Text in PDF form	Video Lessons
Week-1	Module-1 Atmosphere and Climate	1. Atmospheric structure and composition 2. Solar radiation and global energy budget 3. External and internal forcing 4. Climate Feedbacks	1. Introduction to climate change 2. Causes of climate change – Part 1
Week-2	Module-1 Atmosphere and Climate		3. Causes of climate change – Part 2 4. Radiative Forcing
Week-3	Module-1 Atmosphere and Climate		5. Greenhouse Gases Emissions
Week-4	Module-2 Global Climate -Past, Present and Future	5. Account of past climate 6.  Environmental indicators and instrumental records 7. Human Footprints on global warming 8. Predicting future climates 9. Temperature regime 10. Extreme climate events	6. The Past Climate- Part 1 7. The Past Climate- Part 2
Week-5	Module-2 Global Climate -Past, Present and Future		8. Environmental Indicators 9. Human footprints on global warming
Week-6	Module-2 Global Climate -Past, Present and Future		10. Greenhouse gases emission scenario
Week-7	Module-2 Global Climate -Past, Present and Future		11. Temperature regime
Week-8	Module-2 Global Climate -Past, Present and Future		12. Extreme climate events
Week-9	Module-3 Climate Change Impacts	11. Impact of climate change on agriculture 12. Impact of climate change on Livestock  13. Impact of climate change on biodiversity 14. Impact of climate change on water resources	13. Impact of climate change on agriculture 14.Impact of climate change on Livestock  15.Impact of climate change on biodiversity 16.Impact of climate change on water resources
Week-10	Module-3 Climate Change Impacts	15. Impact of climate change on livelihood 16. Impact of climate change on human health 17. Climate change vulnerability assessment	17.Impact of climate change on livelihood 18.Impact of climate change on human health 19.Climate change vulnerability assessment
Week-11	Module-3 Climate Change Impacts	18. Life Cycle Assessment 19. Geoinformatics in Climate Change Studies 20. Concept of mitigation and adaptation	20.Social vulnerability 21.Life Cycle Assessment 22. Geoinformatics in Climate Change Studies- Part 1 23. Geoinformatics in Climate Change Studies- Part 2 24.Concept of mitigation and adaptation
Week-12	Module-3 Climate Change Impacts	21. Climate smart agriculture  22. Soil carbon sequestration  23. Biofuels 24. Climate Refugees 25. Climate Justice 26. Climate Change and Gender	25.Climate smart agriculture – Part 1 26.Climate smart agriculture – Part 2 27.Soil carbon sequestration  28.Biofuels 29.Climate Refugees 30.Climate Justice 31.Climate Change and Gender
Week-13	Module-4 Conventions on climate change	27. International Initiatives 28. National Level Action Plan 29. State Level Action Plan	32.Climate Policy 33.UNFCCC
Week-14	Module-4 Conventions on climate change		34.Paris Agreement 35.SDG 36.SDG 13
Week-15	Module-4 Conventions on climate change		37.National Action Plan on climate change 38.State Action Plan on Climate Change
Week-16	Module-4 Conventions on climate change		39.Response of Subnational Government 40.Social Movements and Global Civil Society

Books and references

Barry RG and Chorley RJ. (2010). Atmosphere, weather and climate. 8th Edition. Routledge, New York. pp.421

Burroughs WJ (2007) Climate Change: A multidisciplinary approach. 2nd Edition. Cambridge University Press. Pp.390. ISBN: 978-0-521-69033-1 

Dessler A (2016) Introduction to Modern Climate Change. 2nd Edition. Cambridge University Press. ISBN: 978-521-17315-5 

Fletcher C (2018) Climate Change: What the science tells us. 2nd Edition. John Wiley & Sons. Pp.336. ISBN: 978-1-118-79306-0 

Houghton JT (2015) Global Warming: The complete briefing. 5th Edition. Cambridge University Press. Pp.456. ISBN: 978-0-521-70916. 

IPCC (2014a) Climate Change 2014: Synthesis Report. Contribution of Working Groups I, II and III to the Fifth Assessment Report of the Intergovernmental Panel on Climate Change [Core Writing Team, R.K. Pachauri and L.A. Meyer (eds.)]. IPCC, Geneva, Switzerland, 151 pp. 

IPCC (2014b) Climate Change 2014: Impacts, Adaptation, and Vulnerability. Part A: Global and Sectoral Aspects. Contribution of Working Group II to the Fifth Assessment Report of the Intergovernmental Panel on Climate Change [Field, C.B., V.R. Barros, D.J. Dokken, K.J. Mach, M.D. Mastrandrea, T.E. Bilir, M. Chatterjee, K.L. Ebi, Y .O. Estrada, R.C. Genova, B. Girma, E.S. Kissel, A.N. Levy, S. MacCracken, P .R. Mastrandrea, and L.L. White (eds.)]. Cambridge University Press, Cambridge, United Kingdom and New York, USA, 1132 pp. 

IPCC (2014c) Climate Change 2014: Mitigation of Climate Change. Contribution of Working Group III to the Fifth Assessment Report of the Intergovernmental Panel on Climate Change [Edenhofer, O., R. Pichs-Madruga, Y. Sokona, E. Farahani, S. Kadner, K. Seyboth, A. Adler, I. Baum, S. Brunner, P. Eickemeier, B. Kriemann, J. Savolainen, S. Schlömer, C. von Stechow, T. Zwickel and J.C. Minx (eds.)]. Cambridge University Press, Cambridge, United Kingdom and New York, NY, USA

IPCC, (2013) Climate Change 2013: The Physical Science Basis. Contribution of Working Group I to the Fifth Assessment Report of the Intergovernmental Panel on Climate Change [Stocker, T.F., D. Qin, G.-K. Plattner, M. Tignor, S.K. Allen, J. Boschung, A. Nauels, Y. Xia, V. Bex and P.M. Midgley (eds.)]. Cambridge University Press, Cambridge, United Kingdom and New York, NY, USA, 1535 pp. 

IPCC, (2018) Summary for Policymakers. In: Global Warming of 1.5°C. An IPCC Special Report on the impacts of global warming of 1.5°C above pre-industrial levels and related global greenhouse gas emission pathways, in the context of strengthening the global response to the threat of climate change, sustainable development, and efforts to eradicate poverty [Masson-Delmotte, V., P. Zhai, H.-O. Pörtner, D. Roberts, J. Skea, P.R. Shukla, A. Pirani, W. Moufouma-Okia, C. Péan, R. Pidcock, S. Connors, J.B.R. Matthews, Y. Chen, X. Zhou, M.I. Gomis, E. Lonnoy, T. Maycock, M. Tignor, and T. Waterfield (eds.)]. World Meteorological Organization, Geneva, Switzerland, 32 pp. 

Web Links 

http://www.ipcc.ch/report/ar5/wg1/  

http://www.ipcc.ch/report/ar5/wg2/  

http://www.ipcc.ch/report/ar5/wg3/

http://www.ipcc.ch/report/ar5/syr/

https://www.ipcc.ch/sr15/

Instructor bio

Dr V. Venkat Ramanan

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Title:	Unit-18 Climate Change: Global Warming
Issue Date:	2017
Publisher:	IGNOU
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Where does global warming occur in the atmosphere, why is global warming a social problem, where does global warming affect polar bears.

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• U.S. Department of Transportation - Global Warming: A Science Overview
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• American Institute of Physics - The discovery of global warming
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Human activity affects global surface temperatures by changing Earth ’s radiative balance—the “give and take” between what comes in during the day and what Earth emits at night. Increases in greenhouse gases —i.e., trace gases such as carbon dioxide and methane that absorb heat energy emitted from Earth’s surface and reradiate it back—generated by industry and transportation cause the atmosphere to retain more heat, which increases temperatures and alters precipitation patterns.

Global warming, the phenomenon of increasing average air temperatures near Earth’s surface over the past one to two centuries, happens mostly in the troposphere , the lowest level of the atmosphere, which extends from Earth’s surface up to a height of 6–11 miles. This layer contains most of Earth’s clouds and is where living things and their habitats and weather primarily occur.

Continued global warming is expected to impact everything from energy use to water availability to crop productivity throughout the world. Poor countries and communities with limited abilities to adapt to these changes are expected to suffer disproportionately. Global warming is already being associated with increases in the incidence of severe and extreme weather, heavy flooding , and wildfires —phenomena that threaten homes, dams, transportation networks, and other facets of human infrastructure. Learn more about how the IPCC’s Sixth Assessment Report, released in 2021, describes the social impacts of global warming.

Polar bears live in the Arctic , where they use the region’s ice floes as they hunt seals and other marine mammals . Temperature increases related to global warming have been the most pronounced at the poles, where they often make the difference between frozen and melted ice. Polar bears rely on small gaps in the ice to hunt their prey. As these gaps widen because of continued melting, prey capture has become more challenging for these animals.

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global warming , the phenomenon of increasing average air temperatures near the surface of Earth over the past one to two centuries. Climate scientists have since the mid-20th century gathered detailed observations of various weather phenomena (such as temperatures, precipitation , and storms) and of related influences on climate (such as ocean currents and the atmosphere’s chemical composition). These data indicate that Earth’s climate has changed over almost every conceivable timescale since the beginning of geologic time and that human activities since at least the beginning of the Industrial Revolution have a growing influence over the pace and extent of present-day climate change .

Giving voice to a growing conviction of most of the scientific community , the Intergovernmental Panel on Climate Change (IPCC) was formed in 1988 by the World Meteorological Organization (WMO) and the United Nations Environment Program (UNEP). The IPCC’s Sixth Assessment Report (AR6), published in 2021, noted that the best estimate of the increase in global average surface temperature between 1850 and 2019 was 1.07 °C (1.9 °F). An IPCC special report produced in 2018 noted that human beings and their activities have been responsible for a worldwide average temperature increase between 0.8 and 1.2 °C (1.4 and 2.2 °F) since preindustrial times, and most of the warming over the second half of the 20th century could be attributed to human activities.

AR6 produced a series of global climate predictions based on modeling five greenhouse gas emission scenarios that accounted for future emissions, mitigation (severity reduction) measures, and uncertainties in the model projections. Some of the main uncertainties include the precise role of feedback processes and the impacts of industrial pollutants known as aerosols , which may offset some warming. The lowest-emissions scenario, which assumed steep cuts in greenhouse gas emissions beginning in 2015, predicted that the global mean surface temperature would increase between 1.0 and 1.8 °C (1.8 and 3.2 °F) by 2100 relative to the 1850–1900 average. This range stood in stark contrast to the highest-emissions scenario, which predicted that the mean surface temperature would rise between 3.3 and 5.7 °C (5.9 and 10.2 °F) by 2100 based on the assumption that greenhouse gas emissions would continue to increase throughout the 21st century. The intermediate-emissions scenario, which assumed that emissions would stabilize by 2050 before declining gradually, projected an increase of between 2.1 and 3.5 °C (3.8 and 6.3 °F) by 2100.

Many climate scientists agree that significant societal, economic, and ecological damage would result if the global average temperature rose by more than 2 °C (3.6 °F) in such a short time. Such damage would include increased extinction of many plant and animal species, shifts in patterns of agriculture , and rising sea levels. By 2015 all but a few national governments had begun the process of instituting carbon reduction plans as part of the Paris Agreement , a treaty designed to help countries keep global warming to 1.5 °C (2.7 °F) above preindustrial levels in order to avoid the worst of the predicted effects. Whereas authors of the 2018 special report noted that should carbon emissions continue at their present rate, the increase in average near-surface air temperature would reach 1.5 °C sometime between 2030 and 2052, authors of the AR6 report suggested that this threshold would be reached by 2041 at the latest.

The AR6 report also noted that the global average sea level had risen by some 20 cm (7.9 inches) between 1901 and 2018 and that sea level rose faster in the second half of the 20th century than in the first half. It also predicted, again depending on a wide range of scenarios, that the global average sea level would rise by different amounts by 2100 relative to the 1995–2014 average. Under the report’s lowest-emission scenario, sea level would rise by 28–55 cm (11–21.7 inches), whereas, under the intermediate emissions scenario, sea level would rise by 44–76 cm (17.3–29.9 inches). The highest-emissions scenario suggested that sea level would rise by 63–101 cm (24.8–39.8 inches) by 2100.

The scenarios referred to above depend mainly on future concentrations of certain trace gases, called greenhouse gases , that have been injected into the lower atmosphere in increasing amounts through the burning of fossil fuels for industry, transportation , and residential uses. Modern global warming is the result of an increase in magnitude of the so-called greenhouse effect , a warming of Earth’s surface and lower atmosphere caused by the presence of water vapour , carbon dioxide , methane , nitrous oxides , and other greenhouse gases. In 2014 the IPCC first reported that concentrations of carbon dioxide, methane, and nitrous oxides in the atmosphere surpassed those found in ice cores dating back 800,000 years.

Of all these gases, carbon dioxide is the most important, both for its role in the greenhouse effect and for its role in the human economy. It has been estimated that, at the beginning of the industrial age in the mid-18th century, carbon dioxide concentrations in the atmosphere were roughly 280 parts per million (ppm). By the end of 2022 they had risen to 419 ppm, and, if fossil fuels continue to be burned at current rates, they are projected to reach 550 ppm by the mid-21st century—essentially, a doubling of carbon dioxide concentrations in 300 years.

A vigorous debate is in progress over the extent and seriousness of rising surface temperatures, the effects of past and future warming on human life, and the need for action to reduce future warming and deal with its consequences. This article provides an overview of the scientific background related to the subject of global warming. It considers the causes of rising near-surface air temperatures, the influencing factors, the process of climate research and forecasting, and the possible ecological and social impacts of rising temperatures. For an overview of the public policy developments related to global warming occurring since the mid-20th century, see global warming policy . For a detailed description of Earth’s climate, its processes, and the responses of living things to its changing nature, see climate . For additional background on how Earth’s climate has changed throughout geologic time , see climatic variation and change . For a full description of Earth’s gaseous envelope, within which climate change and global warming occur, see atmosphere .

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Climate Matters • November 25, 2020

New Presentation: Our Changing Climate

Key concepts:.

Climate Central unveils Our Changing Climate —an informative and customizable climate change presentation that meteorologists, journalists, and others can use for educational outreach and/or a personal Climate 101 tool.

The presentation follows a ”Simple, Serious, Solvable” framework, inspired by climate scientist Scott Denning. This allows the presenter to comfortably explain, and the viewers to easily understand, the causes (Simple), impacts (Serious), and solutions (Solvable) of climate change. 

Our Changing Climate is a revamped version of our 2016 climate presentation, and includes the following updates and features:

Up-to-date graphics and topics

Local data and graphics

Fully editable slides (add, remove, customize)

Presenter notes, background information, and references for each slide

Supplementary and bonus slides

Download Outline (PDF, 110KB)

Download Full Presentation (PPT, 148MB)

Updated: April 2021

Climate Central is presenting a new outreach and education resource for meteorologists, journalists, and others—a climate change presentation, Our Changing Climate . This 55-slide presentation is a guide through the basics of climate change, outlining its causes, impacts, and solutions. This climate change overview is unique because it includes an array of local graphics from our ever-expanding media library. By providing these local angles, the presenter can demonstrate that climate change is not only happening at a global-scale, but in our backyards.

This presentation was designed to support your climate change storytelling, but can also double as a great Climate 101 tool for journalists or educators who want to understand climate change better. Every slide contains main points along with background information, so people that are interested can learn at their own pace or utilize graphics for their own content. 

In addition to those features, it follows the “Simple, Serious, Solvable” framework inspired by Scott Denning, a climate scientist and professor of atmospheric science at Colorado State University (and a good friend of the program). These three S’s help create the presentation storyline and outline the causes (Simple), impacts (Serious), and solutions (Solvable) of climate change. 

Simple. It is simple—burning fossil fuels is heating up the Earth. This section outlines the well-understood science that goes back to the 1800s, presenting local and global evidence that our climate is warming due to human activities.

Serious. More extreme weather, rising sea levels, and increased health and economic risks—the consequences of climate change. In this section, well, we get serious. Climate change impacts are already being felt around the world, and they will continue to intensify until we cut greenhouse gas emissions. 

Solvable. With such a daunting crisis like climate change, it is easy to get wrapped up in the negative impacts. This section explains how we can curb climate change and lists the main pathways and solutions to achieving this goal. 

With the rollout of our new climate change presentation, we at Climate Central would value any feedback on this presentation. Feel free to reach out to us about how the presentation worked for you, how your audience reacted, or any ideas or topics you would like to see included. 

ACKNOWLEDGMENTS & SPECIAL THANKS

Climate Central would like to acknowledge Paul Gross at WDIV-TV in Detroit and the AMS Station Science Committee for the original version of the climate presentation, Climate Change Outreach Presentation , that was created in 2016. We would also like to give special thanks to Scott Denning, professor of atmospheric science at Colorado State University and a member of our NSF advisory board, for allowing us to use this “Simple, Serious, Solvable” framework in this presentation resource.

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Climate change:

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Ede Ijjasz-Vasquez

Nonresident Senior Fellow, Africa Growth Initiative, Brookings Institution

Aloysius Uche Ordu

Director and Senior Fellow, Africa Growth Initiative, Brookings Institution

From COP26 (Glasgow) to COP27 (Sharm el-Sheikh, Egypt): What to expect at Africa’s COP

Despite progress towards the shared goal of addressing climate change, COP26 did not sufficiently put the world on track to successfully tackle the problem. The outcomes especially fell short of what Africans had hoped for. On the positive side, the Glasgow Accord kept the “1.5 o C warming goal alive,” and countries have been asked to come to COP27, to be held in Sharm el Sheikh, Egypt, with more ambitious Nationally Determined Contribution (NDCs). A new agreement on global carbon trading was achieved, adding a much-needed tool to the fight against climate change. Negotiators reached other significant agreements in Glasgow, notably 65 countries committed to phasing out coal power, more than 100 countries agreed to slash methane emissions, and 130 countries—representing over 90 percent of the world’s forests—pledged to end deforestation by 2030.

On the other hand, developed countries failed to reach the $100 billion annual funds promised in Paris to developing countries for climate action by 2020. The current NDCs are estimated to reach a warming trajectory of 2.4 o C—almost an entire degree above the goal . The discussion on climate “loss and damage”—what damage is caused by climate change and which parties should pay for it—made some modest progress, and the Glasgow Accord called to start a dialogue to discuss funding arrangements. Such an announcement is a major step given that many major powers had previously opposed even using the words “loss and damage” in climate-related negotiations.

“Under the projected warming trajectory of 2.4 o C, the impacts of climate change could make many parts of Africa uninhabitable.”

The evident lack of urgency contrasts sharply with the projections from the Sixth Assessment of the Intergovernmental Panel on Climate Change (IPCC) for Africa. Life-threatening temperatures above 40 o C are projected to increase by 10 to 140 days a year, depending on the scenario and region. The continent will see drier conditions in most regions, with more droughts but also more flooding. With the rise in sea level (as much as 0.9 meters by 2100 under high-warming scenarios) and more frequent flooding, a current 1-in-100 year flood event will become 1-in-10 or -20 years by 2050, and 1-in-5 years to annually by 2100, even under moderate warming. With rapidly growing cities in low-lying coastal areas in Africa, the damage to property and livelihoods more generally, exacerbated by climate change, will be compounded. In other words, under the projected warming trajectory of 2.4 o C, the impacts of climate change could make many parts of Africa uninhabitable. Policy change, financial transfers, and decisive and transformational mitigation measures by the largest-emitting countries are critical. The narrative is clear and remains consistent: Africa’s historical and current emissions of greenhouse gases are minimal; still, the region will suffer some of climate change’s most severe consequences if not adequately addressed.

Even if the world remains under 1.5 o C warming, Africa will need to adapt to the new reality of a rapidly changing climate. Thankfully, COP26 did result in some positive steps regarding climate adaptation. The developed world recognized the need to increase funding for adaptation support: The Glasgow Accord “urges developed country Parties to at least double their collective provision of climate finance for adaptation to developing country Parties from 2019 levels by 2025.” Africa was already moving toward a similar goal: The African Development Bank and the Global Center of Adaptation launched a $25 billion program to finance accelerated adaptation in the region earlier in the year.

“Even if the world remains under 1.5 o C warming, Africa will need to adapt to the new reality of a rapidly changing climate.”

Africa has great opportunities to help the world fight climate change but cannot do it alone. The protection and sustainable management of its forest and marine resources can provide essential carbon sinks. In fact, the Congo Basin— the world’s second-largest rainforest and which absorbs 1.2 billion tons of CO2 each year —also has vital mineral reserves needed for the clean industries that underpin the net-zero commitments of countries worldwide. The energy, transport, and urban infrastructure that is yet to be built in Africa over the next two decades will either lock the region into a high-emission economic development trajectory or support the global climate goals if adequate additional resources to finance the extra costs of decarbonization are provided at the level and speed needed.

COP27—the “Africa COP”—is a unique opportunity to accelerate progress in climate action and mobilize the partnerships needed for Africa’s rapid, inclusive, green, and resilient development. However, Africa’s policymakers should not be passive recipients of what “others” can do for Africa in COP27. Africans should be well prepared and organized. They should have a unified, active, and consistent voice about the dire consequences of climate change for the continent and the urgency to take action.

“Africa has great opportunities to help the world fight climate change but cannot do it alone.”

First and foremost, the world needs to show at COP27 that progress and firm commitments—not only pledges—are moving the needle towards the 1.5 o C warming level. As noted above, Africa absolutely cannot afford a 2.4 o C warmer world: At that level of warming, adaptation measures in many parts of the continent may not be technically feasible or financially viable. This point highlights the importance of the other significant opportunity presented by COP27: Leaders must further raise the level of action, speed, and ambition toward climate adaptation, especially for Africa and vulnerable countries in other regions.

As leaders and negotiators descend on Sharm el-Sheikh in 2022, they should focus on four distinct opportunities for decisive, urgent climate action. First, OECD countries and international financial institutions must increase their levels of concessional and private funding for adaptation, including a larger proportion of grants, rapidly and significantly. Second, leaders should increase their focus on the development and scaled-up rollout of adaptation technologies. Climate mitigation technologies receive most of the funding, attention, and support compared to adaptation technologies. At COP27, global leaders must push for a greater balance with adaptation technologies, including the localization and scaling-up of existing African solutions, including multi-hazard early warning systems combining earth observing systems and artificial intelligence with locally trusted communication channels in Africa. Importantly, the scaling up of climate-smart agriculture technologies and practices can tackle the malnutrition and stunting challenge of the region through more productive and resilient food systems. At the same time, climate-smart agricultural technologies can help store carbon in the soil and reduce the pressure on land-use change by improving efficiency and reducing food waste.

“Africa absolutely cannot afford a 2.4 o C warmer world: At that level of warming, adaptation measures in many parts of the continent may not be technically feasible or financially viable.”

Third, Africa needs a decisive push to build capacity in climate change action, not only in ministries of the environment but throughout society. The engineers and urban planners need to incorporate climate considerations in designing and constructing Africa’s infrastructure. African farmers need the best data and knowledge to make informed decisions to increase productivity in the face of a rapidly changing climate that is already impacting their crops. Low-income urban households and rural communities need to know what actions to take to better protect their lives and livelihoods against more frequent and intense climate shocks.

Fourth, leaders must pursue the win-win opportunity of rapidly deploying the global carbon market, while helping Africa enter this market, especially with programs that straddle both climate mitigation and adaptation. Nature-based solutions, energy access programs, and blue and green economy platforms can push forward the enhanced resilience of the region while supporting global emission reduction goals.

“The landmark African Continental Free Trade Agreement can provide the foundation for early agreements on free trade of agricultural products that can balance losses caused by climate shocks.”

At the same time, Africa cannot wait. It must use all its tools to mainstream adaptation in its development path. With the pandemic still causing economic and livelihood damages in every corner of the continent, this task will be harder than ever. Still, low-cost, high-return adaptation measures should be prioritized. These range from land use and simple early warning systems to infrastructure maintenance that can reduce flood damage and protection of environmental assets that protect lives and livelihoods. Importantly, the landmark African Continental Free Trade Agreement can provide the foundation for early agreements on free trade of agricultural products that can balance losses caused by climate shocks.

At Sharm el-Sheikh, at the Africa COP, the world must take advantage of the opportunity to fulfill its responsibility together with Africa. A prosperous future of hundreds of millions of Africans will depend on the decisions and actions taken at COP27. A green and resilient path for Africa’s development cannot wait.

By Jeanine Mabunda Lioko

Jeanine Mabunda Lioko offers recommendations for African policymakers looking to balance sustainable development and universal access to electricity.

By Amar Bhattacharya

Amar Bhattacharya reviews financing strategies for Africa to adapt to and mitigate the impacts of climate change.

By Yvonne Aki-Sawyerr

Freetown Mayor Yvonne Aki-Sawyerr shares examples of how African cities can implement climate change adaptation and mitigation projects.

By Amara Nwankpa

Amara Nwankpa explores the impacts of the climate crisis on food insecurity in Nigeria and offers a framework for reducing food and nutrition vulnerability while enhancing environmental resilience.

Climate migration—deepening our solutions

By Simeon K. Ehui and Kanta Kumari Rigaud

Simeon K. Ehui and Kanta Kumari Rigaud underscore the need for bold, transformative, and foresighted action to address climate-related migration in sub-Saharan Africa.

The urgency and benefits of climate adaptation for Africa’s agriculture and food security

By Holger A. Kray, Chakib Jenane, Ede Ijjasz-Vasquez, and Jamal Saghir

Kray, Jenane, Ijjasz-Vasquez, and Saghir estimate the impact of climate change on the future of food security in Africa.

Next Chapter

05 | Technological innovations

Creating and harnessing tools for improved livelihoods

Foresight Africa: Top priorities for Africa in 2022

On January 26, AGI will host a Foresight Africa launch featuring a high-level panel of leading Africa experts to offer insights on regional trends along with recommendations for national governments, regional organizations, multilateral institutions, the private sector, and civil society actors as they forge ahead in 2022.

Africa in Focus

Join the conversation on the top priorities for Africa in 2022

By ALOYSIUS UCHE ORDU

Aloysius Uche Ordu introduces the 2022 edition of Foresight Africa, which includes brand new themes and a more diverse and representative collection of contributors and reflects the dynamism and optimism of the region.

Foresight Africa Podcast

The Foresight Africa podcast celebrates Africa’s dynamism and explores strategies for broadening the benefits of growth to all people of Africa.

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• > Confronting Climate Change
• > Linkages Between Global Warming, Ozone Depletion, Acid Deposition and Other Aspects of Global Environmental Change

Book contents

• Frontmatter
• Acknowledgements
• List of Reviewers
• 1 Living in a Warming World
• I The Science of Climate Change
• 2 Linkages Between Global Warming, Ozone Depletion, Acid Deposition and Other Aspects of Global Environmental Change
• 3 Climate Sensitivity, Climate Feedbacks and Policy Implications
• 4 Lessons from the Ice Cores: Rapid Climate Changes During the Last 160,000 Years
• 5 Changes in Climates of the Past: Lessons for the Future
• 6 Indices and Indicators of Climate Change: Issues of Detection, Validation and Climate Sensitivity
• II Impacts of Global Climate Change
• III Energy Use and Technology
• IV Economics and the Role of Institutions
• V Equity Considerations and Future Negotiations

2 - Linkages Between Global Warming, Ozone Depletion, Acid Deposition and Other Aspects of Global Environmental Change

Published online by Cambridge University Press:  06 January 2010

Editor's Introduction

Environmental problems do not occur in isolation from each other; in fact there is often an ironically cruel symmetry about them. For example, carbon dioxide (CO 2 ) is the indispensable feedstock for life on Earth and the amount of CO 2 in the atmosphere regulates the process known as “the greenhouse effect.” This effect is a fundamental geophysical mechanism that warms the lower atmosphere and thus allows life to exist on the surface. The buildup of CO 2 could thus be beneficial, stimulating plant growth. However, the very rapid pace of growth of atmospheric CO 2 (and other greenhouse gases), occurring at present by many human activities, are expected to upset the stability of traditional climates and dramatically alter the conditions that support already strained human societies and natural ecosystems.

Environmental problems can not be separated from human activities. Chlorofluorocarbons (CFCs) are an entirely man-made family of industrial gases. For more than three decades, these inexpensive and versatile compounds — which are neither toxic, nor corrosive, nor explosive — were touted as the “miracle drugs” of the chemical industry. Now we know that they are an important cause of stratospheric ozone depletion and also contribute to the greenhouse effect. As a consequence of our expanding knowledge of their environmental effects, the traditional (and most dangerous) varieties of these compounds are the focus of an internationally agreed phaseout programme.

And finally, environmental activities are inextricably woven into a complex tapestry of interactive atmospheric and biological mechananisms. These natural feedback processes have no regard for international conventions, legal boundaries, or political ideologies.

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• Linkages Between Global Warming, Ozone Depletion, Acid Deposition and Other Aspects of Global Environmental Change
• By Paul J. Crutzen , Georgii S. Golitsyn
• Edited by Irving M. Mintzer , Stockholm Environment Institute
• Book: Confronting Climate Change
• Online publication: 06 January 2010
• Chapter DOI: https://doi.org/10.1017/CBO9780511608292.003

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Climate Change

How are global temperatures changing, and what are the impacts on sea level rise, sea ice, and ice sheets?

By: Hannah Ritchie , Pablo Rosado and Veronika Samborska

Current climate change is primarily caused by human emissions of greenhouse gases. This warming can drive large changes in sea level, sea ice and glacier balances, rainfall patterns, and extreme temperatures. This has potentially devastating impacts on human health, farming systems, the stability of societies, and other species.

To limit and stop climate change, we need to greatly reduce global emissions of greenhouse gases. We cover these emissions in our work on CO 2 and other greenhouse gas emissions . This will require massive shifts in our energy and food systems , which we also cover in detail.

On this page, you will find global data and research on the impacts of climate change, including temperature anomalies, sea level rise, sea ice melt, glacier loss, and ocean acidification.

See all of our interactive charts on climate change ↓

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More people care about climate change than you think

The majority of people in every country support action on climate, but the public consistently underestimates this share.

Hannah Ritchie

How much have temperatures risen in countries across the world?

Explore country-by-country data on monthly temperature anomalies.

Veronika Samborska

How much CO2 can the world emit while keeping warming below 1.5°C and 2°C?

The budget to keep temperatures below 1.5°C is less than a decade of current emissions. For 2°C, it’s less than three decades.

Related work on climate change and its impacts

CO₂ and Greenhouse Gas Emissions

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What evidence exists that Earth is warming and that humans are the main cause?

We know the world is warming because people have been recording daily high and low temperatures at thousands of weather stations worldwide, over land and ocean, for many decades and, in some locations, for more than a century. When different teams of climate scientists in different agencies (e.g., NOAA and NASA) and in other countries (e.g., the U.K.’s Hadley Centre) average these data together, they all find essentially the same result: Earth’s average surface temperature has risen by about 1.8°F (1.0°C) since 1880. 

( bar chart ) Yearly temperature compared to the twentieth-century average from 1850–2023. Red bars mean warmer-than-average years; blue bars mean colder-than-average years. (line graph) Atmospheric carbon dioxide amounts: 1850-1958 from IAC , 1959-2023 from NOAA Global Monitoring Lab . NOAA Climate.gov graph, adapted from original by Dr. Howard Diamond (NOAA ARL).

In addition to our surface station data, we have many different lines of evidence that Earth is warming ( learn more ). Birds are migrating earlier, and their migration patterns are changing.  Lobsters  and  other marine species  are moving north. Plants are blooming earlier in the spring. Mountain glaciers are melting worldwide, and snow cover is declining in the Northern Hemisphere (Learn more  here  and  here ). Greenland’s ice sheet—which holds about 8 percent of Earth’s fresh water—is melting at an accelerating rate ( learn more ). Mean global sea level is rising ( learn more ). Arctic sea ice is declining rapidly in both thickness and extent ( learn more ).

The Greenland Ice Sheet lost mass again in 2020, but not as much as it did 2019. Adapted from the 2020 Arctic Report Card, this graph tracks Greenland mass loss measured by NASA's GRACE satellite missions since 2002. The background photo shows a glacier calving front in western Greenland, captured from an airplane during a NASA Operation IceBridge field campaign. Full story.

We know this warming is largely caused by human activities because the key role that carbon dioxide plays in maintaining Earth’s natural greenhouse effect has been understood since the mid-1800s. Unless it is offset by some equally large cooling influence, more atmospheric carbon dioxide will lead to warmer surface temperatures. Since 1800, the amount of carbon dioxide in the atmosphere  has increased  from about 280 parts per million to 410 ppm in 2019. We know from both its rapid increase and its isotopic “fingerprint” that the source of this new carbon dioxide is fossil fuels, and not natural sources like forest fires, volcanoes, or outgassing from the ocean.

Philip James de Loutherbourg's 1801 painting, Coalbrookdale by Night , came to symbolize the start of the Industrial Revolution, when humans began to harness the power of fossil fuels—and to contribute significantly to Earth's atmospheric greenhouse gas composition. Image from Wikipedia .

Finally, no other known climate influences have changed enough to account for the observed warming trend. Taken together, these and other lines of evidence point squarely to human activities as the cause of recent global warming.

USGCRP (2017). Climate Science Special Report: Fourth National Climate Assessment, Volume 1 [Wuebbles, D.J., D.W. Fahey, K.A. Hibbard, D.J. Dokken, B.C. Stewart, and T.K. Maycock (eds.)]. U.S. Global Change Research Program, Washington, DC, USA, 470 pp, doi:  10.7930/J0J964J6 .

National Fish, Wildlife, and Plants Climate Adaptation Partnership (2012):  National Fish, Wildlife, and Plants Climate Adaptation Strategy . Association of Fish and Wildlife Agencies, Council on Environmental Quality, Great Lakes Indian Fish and Wildlife Commission, National Oceanic and Atmospheric Administration, and U.S. Fish and Wildlife Service. Washington, D.C. DOI: 10.3996/082012-FWSReport-1

IPCC (2019). Summary for Policymakers. In: IPCC Special Report on the Ocean and Cryosphere in a Changing Climate. [H.-O. Pörtner, D.C. Roberts, V. Masson-Delmotte, P. Zhai, M. Tignor, E. Poloczanska, K. Mintenbeck, A. Alegría, M. Nicolai, A. Okem, J. Petzold, B. Rama, N.M. Weyer (eds.)]. In press.

NASA JPL: "Consensus: 97% of climate scientists agree."  Global Climate Change . A website at NASA's Jet Propulsion Laboratory (climate.nasa.gov/scientific-consensus). (Accessed July 2013.)

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How global warming is disrupting life on Earth

The signs of global warming are everywhere, and are more complex than just climbing temperatures.

Our planet is getting hotter. Since the Industrial Revolution—an event that spurred the use of fossil fuels in everything from power plants to transportation—Earth has warmed by 1 degree Celsius, about 2 degrees Fahrenheit.  

That may sound insignificant, but 2023 was the hottest year on record , and all 10 of the hottest years on record have occurred in the past decade.  

Global warming and climate change are often used interchangeably as synonyms, but scientists prefer to use “climate change” when describing the complex shifts now affecting our planet’s weather and climate systems.  

Climate change encompasses not only rising average temperatures but also natural disasters, shifting wildlife habitats, rising seas , and a range of other impacts. All of these changes are emerging as humans continue to add heat-trapping greenhouse gases , like carbon dioxide and methane, to the atmosphere.

What causes global warming?

When fossil fuel emissions are pumped into the atmosphere, they change the chemistry of our atmosphere, allowing sunlight to reach the Earth but preventing heat from being released into space. This keeps Earth warm, like a greenhouse, and this warming is known as the greenhouse effect .  

Carbon dioxide is the most commonly found greenhouse gas and about 75 percent of all the climate warming pollution in the atmosphere. This gas is a product of producing and burning oil, gas, and coal. About a quarter of Carbon dioxide also results from land cleared for timber or agriculture.  

Methane is another common greenhouse gas. Although it makes up only about 16 percent of emissions, it's roughly 25 times more potent than carbon dioxide and dissipates more quickly. That means methane can cause a large spark in warming, but ending methane pollution can also quickly limit the amount of atmospheric warming. Sources of this gas include agriculture (mostly livestock), leaks from oil and gas production, and waste from landfills.  

What are the effects of global warming?  

One of the most concerning impacts of global warming is the effect warmer temperatures will have on Earth's polar regions and mountain glaciers. The Arctic is warming four times faster than the rest of the planet. This warming reduces critical ice habitat and it disrupts the flow of the jet stream, creating more unpredictable weather patterns around the globe.  

( Learn more about the jet stream. )

A warmer planet doesn't just raise temperatures. Precipitation is becoming more extreme as the planet heats. For every degree your thermometer rises, the air holds about seven percent more moisture. This increase in moisture in the atmosphere can produce flash floods, more destructive hurricanes, and even paradoxically, stronger snow storms.  

The world's leading scientists regularly gather to review the latest research on how the planet is changing. The results of this review is synthesized in regularly published reports known as the Intergovernmental Panel on Climate Change (IPCC) reports.  

A recent report outlines how disruptive a global rise in temperature can be:

• Coral reefs are now a highly endangered ecosystem. When corals face environmental stress, such as high heat, they expel their colorful algae and turn a ghostly white, an effect known as coral bleaching . In this weakened state, they more easily die.  
• Trees are increasingly dying from drought , and this mass mortality is reshaping forest ecosystems.
• Rising temperatures and changing precipitation patterns are making wildfires more common and more widespread. Research shows they're even moving into the eastern U.S. where fires have historically been less common.
• Hurricanes are growing more destructive and dumping more rain, an effect that will result in more damage. Some scientists say we even need to be preparing for Cat 6 storms . (The current ranking system ends at Cat 5.)

How can we limit global warming?  

Limiting the rising in global warming is theoretically achievable, but politically, socially, and economically difficult.  

Those same sources of greenhouse gas emissions must be limited to reduce warming. For example, oil and gas used to generate electricity or power industrial manufacturing will need to be replaced by net zero emission technology like wind and solar power. Transportation, another major source of emissions, will need to integrate more electric vehicles, public transportation, and innovative urban design, such as safe bike lanes and walkable cities.  

( Learn more about solutions to limit global warming. )

One global warming solution that was once considered far fetched is now being taken more seriously: geoengineering. This type of technology relies on manipulating the Earth's atmosphere to physically block the warming rays of the sun or by sucking carbon dioxide straight out of the sky.

Restoring nature may also help limit warming. Trees, oceans, wetlands, and other ecosystems help absorb excess carbon—but when they're lost, so too is their potential to fight climate change.  

Ultimately, we'll need to adapt to warming temperatures, building homes to withstand sea level rise for example, or more efficiently cooling homes during heat waves.  

Related Topics

• CLIMATE CHANGE
• ENVIRONMENT AND CONSERVATION
• POLAR REGIONS

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Global Warming

Miss Parson – Allerton Grange School

Aims and objectives

• To be able to define and understand the process of Global Warming.
• Be able to describe the effects of Global Warming on a global and local scale.
• Be able to recognise how the effects of Global Warming can be reduced.

What is�Global Warming ?

Global warming is the increase in the world’s average temperature, believed to be the result from the release of carbon dioxide and other gases into the atmosphere by burning fossil fuels.

This increase in greenhouse gases is causing an increase in the rate of the greenhouse effect .

The Greenhouse�Effect

The earth is warming rather like the inside of a greenhouse. On a basic level the sun’s rays enter the earths atmosphere and are prevented from escaping by the greenhouse gases. This results in higher world temperatures.

In more detail………

Energy from the sun drives the earth's weather and climate, and heats the earth's surface; in turn, the earth radiates energy back into space. Atmospheric greenhouse gases (water vapor, carbon dioxide, and other gases) trap some of the outgoing energy, retaining heat somewhat like the glass panels of a greenhouse.�

Without this natural "greenhouse effect," temperatures would be much lower than they are now, and life as known today would not be possible. Instead, thanks to greenhouse gases, the earth's average temperature is a more hospitable 60°F. However, problems may arise when the atmospheric concentration of greenhouse gases increases. �

What are the�greenhouse gases?

Since the beginning of the industrial revolution, atmospheric concentrations of carbon dioxide have increased nearly 30%, methane concentrations have more than doubled, and nitrous oxide concentrations have risen by about 15%. Why are greenhouse gas concentrations increasing?

Burning of fossil fuels and other human activities are the primary reason for the increased concentration of carbon dioxide.

CFC’s from aerosols, air conditioners, foam packaging and refrigerators most damaging (approx 6%).

Methane is released from decaying organic matter, waste dumps, animal dung, swamps and peat bogs (approx 19%).

Nitrous Oxide is emitted from car exhausts, power stations and agricultural fertiliser (approx 6%).

The major contributor is Carbon Dioxide (approx 64%).

Task 1:The �Greenhouse Effect

Complete your worksheet by cutting and labeling the diagram and answering the questions

Task 2 : Effects of global warming

You are about to see a series of pictures which show some of the effects of global warming.

Draw a rough sketch then write down the effects or titles for the pictures you've drawn

I’m thinking !

What are the consequences of Global Warming?

What are the pictures showing, what are the effects of global warming?

How did�you do?

Hurricanes –extreme weather

Flooding of coastal areas

Desertification

Ice caps melt

Rise in temperatures

Loss of wildlife habitats and species

Sea level rise

Extreme storms

There are also some positive effects of global warming

• Decrease in death and disease
• Healthier, faster growing forests due to excess CO2
• Longer growing seasons
• Warmer temperatures (UK Mediterranean climate!!)
• Plants and shrubs will be able to grow further north and in present desert conditions
• Heavier rainfall in certain locations will give higher agricultural production (Rice in India, Wheat in Africa).

How can Global Warming be reduced?

• Reduce the use of fossil fuels. A major impact would be to find alternatives to coal, oil and gas power stations.
• Afforest areas, trees use up the CO2, reduce deforestation.
• Reduce the reliance on the car (promote shared public transport).
• Try to use energy efficiently (turn off lights and not use as much!).
• Reduce, Reuse, Recycle.
• Careful long term planning to reduce the impact of global warming.
• Global Warming is the increase in global temperatures due to the increased rate of the Greenhouse Effect.
• Greenhouse gases trap the incoming solar radiation, these gases include Carbon Dioxide, CFCs, Methane, Nitrous Oxides and other Halocarbons. These are released by human activity.
• We need the Greenhouse effect to maintain life on earth as we know it…however if we keep adding to the Greenhouse gases there will be many changes.
• Consequences can be negative ( ice caps melt, sea level rise, extreme weather conditions) or positive (more rain in drought areas, longer growing season).

Re do diagram slide 7

http://www.flickr.com/photos/wwworks/2222523486/ - slide 1

http://www.flickr.com/photos/dzwjedziak/375723120/ - slide 8 and 1

http://www.flickr.com/photos/bratan/452189020/ - slide 4

http://www.flickr.com/photos/hogbard/412932972/- slide 6

http://www.flickr.com/photos/tiger_empress/467671978/ - slide 8

http://www.flickr.com/photos/48135670@N00/97951579/ - slide 9,12

http://www.flickr.com/photos/60158441@N00/177929708/ - slide 9,12

http://www.flickr.com/photos/andzer/1480068258/ - slide 9,12

http://www.flickr.com/photos/nickrussill/146743082/ - slide 9,12

http://www.flickr.com/photos/dasha/443747644/ - slide 10,13

http://www.flickr.com/photos/11371618@N00/469788104/ - slide 10,13

http://www.flickr.com/photos/mikebaird/2087879492/ - slide 10,13

http://www.flickr.com/photos/7471118@N02/432453250/ - slide 10,13

http://www.flickr.com/photos/madron/2595909135/ - slide 11

http://www.flickr.com/photos/chi-liu/491412087/ - slide 12,13

http://www.flickr.com/photos/fabbriciuse/2073789872/ - slide 16

http://www.flickr.com/photos/algo/92463787/ - slide 16

http://www.flickr.com/photos/nickwheeleroz/2295584401/ - slide 16

http://www.flickr.com/photos/andidfl/229169559/ - slide 16

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ENCYCLOPEDIC ENTRY

Global warming.

The causes, effects, and complexities of global warming are important to understand so that we can fight for the health of our planet.

Earth Science, Climatology

Tennessee Power Plant

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Photograph by Emory Kristof/ National Geographic

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Global warming is the long-term warming of the planet’s overall temperature. Though this warming trend has been going on for a long time, its pace has significantly increased in the last hundred years due to the burning of fossil fuels . As the human population has increased, so has the volume of fossil fuels burned. Fossil fuels include coal, oil, and natural gas, and burning them causes what is known as the “greenhouse effect” in Earth’s atmosphere.

The greenhouse effect is when the sun’s rays penetrate the atmosphere, but when that heat is reflected off the surface cannot escape back into space. Gases produced by the burning of fossil fuels prevent the heat from leaving the atmosphere. These greenhouse gasses are carbon dioxide , chlorofluorocarbons, water vapor , methane , and nitrous oxide . The excess heat in the atmosphere has caused the average global temperature to rise overtime, otherwise known as global warming.

Global warming has presented another issue called climate change. Sometimes these phrases are used interchangeably, however, they are different. Climate change refers to changes in weather patterns and growing seasons around the world. It also refers to sea level rise caused by the expansion of warmer seas and melting ice sheets and glaciers . Global warming causes climate change, which poses a serious threat to life on Earth in the forms of widespread flooding and extreme weather. Scientists continue to study global warming and its impact on Earth.

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