sio15 lecture 21: long- and short-term climate changes · leftovers from lecture 20 past climate...

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SIO15 Lecture 21: Long- and Short-term Climate Changes Leftovers from Lecture 20 Past Climate Changes - Why should We Care? Long-term Changes - Millions of Years Greenhouse Gases Feedback Mechanisms Radiative Forcing The Role of Plate Tectonics Climate on Early Earth Recent Temperature Observations (Global Warming) Miscellaneous Proxies

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Page 1: SIO15 Lecture 21: Long- and Short-term Climate Changes · Leftovers from Lecture 20 Past Climate Changes - Why should We Care? Long-term Changes - Millions of Years Greenhouse Gases

SIO15 Lecture 21: Long- and Short-term Climate ChangesLeftovers from Lecture 20

Past Climate Changes - Why should We Care?

Long-term Changes - Millions of Years

Greenhouse Gases

Feedback MechanismsRadiative Forcing

The Role of Plate Tectonics

Climate on Early Earth

Recent Temperature Observations (Global Warming)

Miscellaneous

Proxies

Page 2: SIO15 Lecture 21: Long- and Short-term Climate Changes · Leftovers from Lecture 20 Past Climate Changes - Why should We Care? Long-term Changes - Millions of Years Greenhouse Gases

Ice Ages and the Milankovitch Cycles

Short-Term Changes: scale of 1000s of years

Short-Term Changes: a few to 10s of years

Long-Term Climate (T and Precipitation)

Fertile Crescent

Episodes after the Last Ice Age

The Little Ice Age

Sea Level Changes

Last Glaciation, Sea level Change and Glacial Advance

The Sun Spot Cycle Volcanic Eruptions

El Nino

Feedback and the Sawtooth

watch short Video 21