Abrupt Climate Change. Review of last lecture Mean state: The two basic regions of SST? Which region has stronger rainfall? What is the Walker circulation?

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Presentation transcript:

Abrupt Climate Change

Review of last lecture Mean state: The two basic regions of SST? Which region has stronger rainfall? What is the Walker circulation? Two types of ocean upwelling Mean state: ocean-atmosphere feedback ENSO: Which region has warm SST anomaly during El Nino? 4- year period. Existing ENSO theories AMO and thermohaline circulation

Global connections

The most common atmospheric circulation structure L H H L Heating Cooling or No Heating Imbalance of heating  Imbalance of temperature  Imbalance of pressure  Wind Radiation Convection Conduction Latent/Sensible Biosphere Land/Ocean/Ice/Stra tosphere Feedback Greenhouse Gases Pollution Clouds Precipitation (Latent heat)

Projected Change in Global Mean Temperature

Abrupt climate change and tipping point – Lesson from Earth’s climate history

Termination of the Younger Dryas cold event and last ice age 11,600 years ago

Abrupt climate change and history/politics - Collapse of Maya civilization and Chinese ancient dynasties Drought s

Bifurcation and tipping point

Movie time A global warning?

Examples of tipping points

Interactions among tipping points

Mitigation of global warming: Kyoto protocol Negotiated in Commits parties to internationally binding emission reduction targets. “Common but differentiated responsibilities” –Specific reduction targets for developed countries –Measures to slow the growth of emissions in developing countries Non-parties: –Canada –USA –Andorra –South Sudan –Palestine –Vatican City

Green economy

Summary Past abrupt climate change Tipping points Future abrupt climate change Mitigation: International (Kyoto Protocol), Green economy (Renewable energy, Sustainable transportation, Green buildings, Energy-efficient industry and carbon capture, Land management, afforestation, waste management)

Work cited sentiment-remains-strong/ sentiment-remains-strong/ _011847http:// 2_ generating-industries/Post-Combustion-Carbon-Capture.aspxhttp:// generating-industries/Post-Combustion-Carbon-Capture.aspx pdfhttp://yosemite.epa.gov/ee/epa/eerm.nsf/vwAN/EE pdf/$file/EE pdf close-to-climate-tipping-point/ close-to-climate-tipping-point/

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