Presentation made by Vasudha Foundation Programme Manager Siddharth Chatpalliwar at the "Low Carbon Options in South Asia" workshop held in Nepal in August 2014.
2. Broad Outline-
• Highlights of IPCC’s Fifth Assessment Report
• Comparison of the Fourth and Fifth
Assessment Reports
• Challenges posed by climate change for South
Asia
• Key messages for South Asia.
3. Highlights of AR 5
1. Human activity- greater than 95% chance that human
activities are the dominant cause of observed warming
since the 1950s.
1. Global changes- estimated warming of 0.85 degrees
Celsius since 1880, with the fastest rate of warming in
the Arctic.
1. Sea- level rise- Greater that 66% chance that the Arctic
Ocean will be ice free during a greater part of the
summer before 2050 under a high emission scenario.
6. 4. Surface warming pause- the recent reduction in
surface warming is probably due to a redistribution of
heat in the ocean, volcanic eruptions, and the recent
minimum in the 11-year solar cycle.
5. Cumulative carbon budget- a GHG emissions budget
of 840Gt of carbon has been identified. More than half
of that (over 531GtC) has already been emitted.
6. Land based food systems- climate change to affect
food security in areas where most of the world’s food
production occurs.
7.
8. Comparison between AR4 and AR5
• Global sea level is expected to rise more by
2100 than previously projected.
• There is less confidence that global average
rainfall has increased in the past, but greater
confidence that it will increase in the future.
• No change to earlier conclusion regarding
trends in flooding.
• No change to earlier conclusions about the
likely range of equilibrium climate sensitivity.
9. Challenges for South Asia
• Temperature rise- average annual temperatures could rise by
more than 2°C over land in most of South Asia by the mid-21st
century and exceed 3°C under a high emissions scenario.
• Rainfall trends- by mid-21st century southern areas of Asia will
experience more rainfall. Rainfall will be more extreme near the
centres of tropical cyclones making landfall in south asia.
• Sea level rise- magnitude of sea level rise by the century’s end
implies increased risks for South Asia’s coastal settlements
particularly if combined with changes in cyclone frequency or
intensity.
10. • Coastal systems- sea level rise will lead to submergence, coastal
flooding, and erosion.
• Climate change will cause declines in agricultural productivity in
many sub-regions of Asia, for crops such as rice and wheat. This
could lead to higher food prices and living costs, malnutrition,
and worsened rural poverty.
• Marine systems- higher latitudes will see more biodiversity
while marine population will decline in tropical latitudes.
• Flood damage- risk of floods poses a threat to infrastructure,
livelihoods, and settlements.
• Heat related mortality is another major challenge.
14. Key messages for South Asia
• South Asia’s climate is already changing and its impacts
are already being felt.
• Mitigation for decarbonizing the economy is absolutely
essential to reduce the impacts of climate change.
• Some low carbon options may be less costly in the long
run but could offer new economic opportunities for
South Asia.
• South Asia stands to benefit from integrated climate
adaptation, mitigation, and development approaches.