Global Climate Change: The Heart of the Matter. What we can see (observations) What is causing it (causes and evidence) What can happen (projections)

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Presentation transcript:

Global Climate Change: The Heart of the Matter

What we can see (observations) What is causing it (causes and evidence) What can happen (projections) What we can do (responses) The Heart of the Matter

What we can see (observations) What is causing it (causes and evidence) What can happen (projections) What we can do (responses) The Heart of the Matter

Warming is Unequivocal

And Not Uniform

l-weddings-and-climate-change1/

NASA 2003 European Heat Wave

After Schaer et al., 2004 Switzerland Summer Temperature 2003 European Heat Wave

What we can see (observations) What is causing it (causes and evidence) What can happen (projections) What we can do (responses) The Heart of the Matter

Ice Core Records

Radiative Forcing

IPCC, 2007 Black = Observed Gold = Human and Natural Forcings Blue = Only Natural Forcings Fingerprint Analysis

What we can see (observations) What is causing it (causes and evidence) What can happen (projections) What we can do (responses) The Heart of the Matter

UCS Projected Changes in CA Summer Temperature

Diminishing Sierra Snowpack Percentage Remaining, Relative to UCS

Tipping elements in the Earth system Lenton et al., PNAS 2008

What we can see (observations) What is causing it (causes and evidence) What can happen (projections) What we can do (responses) The Heart of the Matter

Mitigation Adaptation

Climate Stabilization

Raupach et al., 2007 Regional CO 2 Emissions Growth

Davis and Caldeira, 2010

IPCC, Extreme Events: Heat

IPCC, 2007 Extreme Events: Heat 29