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Status of Climate Change 2013
CaTee ConferenceSan Antonio
2013
Menu for Today
• IPCC 2013: Assessment Report #5• Facts about Climate Change• Who will Win, Who will Lose• What Needs to be Done
IPCC #5
• No great surprises - Sharper language• Uncertainties are still large• Essentially no change in Projections
except Sea Level Change expected higher than #4
• No Change for Hurricanes, Severe Weather – still very uncertain
• Ocean Acidification more certain, probably more serious
Facts about Climate Change
About 0.8o C pe
r century
Ten Year Climatology from Tropical Rainfall Measuring Mission
Climate Change: The
arid subtropics will expand
IPCC #5 future Climate Change
Oceans become More Acidic due to Dissolving CO2
Winners & Losers
Managed vs. Unmanaged Systems
Which sectors are growing?
From: The Climate Casino by William Nordhaus, 2013
From: The Climate Casino by William Nordhaus, 2013
What Needs to be Done
Sources of the CO2
From: The Climate Casino by William Nordhaus, 2013
From: The Climate Casino by William Nordhaus, 2013
From: The Climate Casino by William Nordhaus, 2013
Conclusions•Climate is changing, no doubt• It will get warmer, more arid in most
subtropical areas: water problems• Ocean will get more acidic:
extinctions•Mitigation is imperative, but adaptation must play a role•Coal burning is the main emitter of CO2 world-wide• We need market mechanisms to
curb it•Poor countries will suffer most because of vulnerabilities: migration, war•The really difficult problem is with problems that involve values we cherish, but cannot be quantified.
