This document provides an overview of the contributions of Working Group II to the Fifth Assessment Report of the Intergovernmental Panel on Climate Change. It discusses the framing of climate change risks and opportunities in interaction with adaptation, mitigation and sustainable development. The assessment includes over 500,000 review comments from 308 authors across 70 countries. It finds widespread observed impacts of climate change around the world and increased risks to food and water security, health, coastal flooding and poverty with continued high emissions and warming. The report also examines regional vulnerabilities and opportunities for additional adaptation to reduce risks in Southeast Asia, South Asia and the Lower Mekong Basin.

1. Impacts, Adaptation
and Vulnerability
An Overview of AR5
WG II Contribution
Purnamita Dasgupta
CLA, Chapter 9

2. The Framing: Climate as part of multiple,
interacting contexts
(a) Risks and Opportunities
(b) Interactions : Adaptation, Mitigation and
Sustainable Development
The Presentation: Two parts
Part A: Global and Sectoral Aspects (ch 1-20);
Part B: Regional Aspects (21-30)
The Literature Assessment: 308 authors, 70
countries, 50492 review comments

3. 7. Industry, Settlement and Society
8. Human Health
17. Assessment of Adaptation Practices, Options, Constraints and Capacity
18. Inter-relationships Between Adaptation and Mitigation
8. Urban Areas
9. Rural Areas
10. Key Economic Sectors
11. Human Heath
12. Human Security
13. Livelihoods and Poverty
14. Adaptation Needs and Options
15. Adaptation Planning and Implementation
16. Adaptation Opportunities, Constraints, and Limits
17. Economics of Adaptation
AR4
AR5
AR4
AR5

4. A CHANGING WORLD
WIDESPREAD
OBSERVED IMPACTS

5. AROUND THE WORLD
VULNERABILITY
AND EXPOSURE

6. Risk Level with
Current Adaptation
Potential for
Additional
Adaptation to
Reduce Risk
Risk Level with
High Adaptation
Risk-Level
Very
Low Med
Very
High
4°C
2°C
Present
Long Term
(2080-2100)
Near Term (2030-2040)

7. THE LIKELIHOOD OF
INCREASING MAGNITUDES
OF WARMING INCREASE
SEVERE AND
PERVASIVE IMPACTS

8. WITH CONTINUED
HIGH EMISSIONS
INCREASE
RISKS OF
CLIMATE CHANGE

9. Without additional mitigation, global mean surface temperature
is projected to increase by 3.7 to 4.8°C over the 21st century.
9
Based on WGII AR5
Figure 19.4

10. IPCC AR5 Synthesis Report
Potential Impacts of Climate Change
F ood and water
shortages
Increased poverty
Increased morbidity
and mortality
Coastal flooding
AR5 WGII SPM

11. IPCC AR5 Synthesis Report
Key risks: Climate change,SouthEast Asia

12. IPCC AR5 Synthesis Report
Region: Impacted by Flooding and Droughts
Vulnerabilities
*
Some concerns….with adaptation potential bars relatively
small in most cases at 4 deg C
• Wildfires, Health impacts from smoke exposure.
• Increase in vector borne diseases such as dengue
• Decline in rice yields, fisheries
* Please Refer to Table in the Asia Flyer

14. CLIMATE CHANGE
REDUCING AND
MANAGING RISKS

15. IPCC AR5 Synthesis Report
Climate change in the The Lower Mekong Basin
Observations & future projections include:
• Intensified flood and drought events which
have noticeably impacted agricultural output
(90% rice production losses in Cambodia
during 1996-2001)
• Vietnam and Cambodia are most vulnerable to
climate change impacts on fisheries
AR5 WGII ch.24
All countries of the LMB have national
adaptation plans; Transboundary
adaptation planning : A multi-
stakeholder Regional Adaptation Action
Network has been proposed.