Lecture 6: Climate Changes

Global Surface Temperature

More Warming in the N.H.

Faster Warming Trend Over Lands

Climate Change on Various Time Scales

Tectonic-Scale Climate Change

Circulation of the Solid Earth

Twenty Rigid Plates

Tectonic Control of CO2 Input – The Seafloor Spreading Rate Hypothesis

Why the Cooling over the Last 50 Myr?

Orbital-Scale Climate Change

Earth’s Orbit and Its Variations

How Does the Tilt Affect Climate?

Slide 14

Milankovitch Theory

Evidence of Ice Sheet Evolution

Slide 17

The Last Glacial Maximum (21,000 Years Ago)

Slide 19

Historical Climate Changes

The Little Ice Age

IPCC AR4
Ch. 10: Global Climate Projections

IPCC Special Report on Emission Scenarios (SRES)

A1 Scenario

AR4 Simulations

CO2 Emission for All Scenarios

Slide 27

Projected Surface Warming
(relative to 1980-1999)

Warming Pattern / Ocean vs. Land
(during 2080-2099)

Vertical Distribution of Warming

Projected Temperature Extreme

Projected Changes in Cloud Cover

Projected Precipitation Changes

Projected Monsoon Precipitation Changes

Projected Precipitation Extreme

Projected Hurricane Activities

Projected Extratropical Storms

Projected ENSO Activity

Projected Sea Ice Cover

Projected Change in Atlantic
Meridional Overturning Circulation (MOC)

Positive Climate-Carbon Cycle Feedback

Projected Sea Level Rise

Global Warming and Sea-Level Change

IPCC AR4
Ch. 11: Regional Climate Projections

How to Make Regional Projections?

Table 11.1

Table 11.1

Summary of Regional Responses - Temperature

Summary of Regional Responses - Precipitation

Projected Precipitation Changes

Africa

Key Processes to African Rainfalls

Hurricane Distribution

Europe and Mediterranean

North Atlantic Oscillation

Asia

Projected Monsoon Precipitation Changes

North America

Central and South America

Slide 60

Key Processes to South America Rainfalls

Australia and New Zealand

Arctic and Antarctic

Antarctic Temperature Changes

ENSO and Antarctic Climate