Class Notes 12-1

Class Notes 12-1 - December 1, 2011 Guest Lecturer Quiz:...

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December 1, 2011 Guest Lecturer Quiz: Where are we? See slides for pictures Russia: Warmest July 2010 in 130 Years! What makes out current era unique? What will we be remembered for 1,000 years from now? What are out legal and ethical obligations to other nations and future generations? What is driving change? Global population increase 6x since late 18 th century 4x since 1880, 22% since 1990 to 6.7 billion Gross World Product (GWP) grew 80x since late 18 th century, 40% since 1990 Since 1950: Population up 2.5x (see slides) .85% of all land has been modified by human use CO 2 concentrations today exceed anything scientists have measured or estimated in at least the past 800,000 years CO 2 and water vapor both absorb radiation from the earth’s surface As change CO 2 , change amount of radiation that stays in the earths system Global CO 2 is rising in concert (at half the rate) with fossil fuel emissions Short-term plateaus in climate trends are expected (see slide) Phase in the Pacific Ocean, for example
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Class Notes 12-1 - December 1, 2011 Guest Lecturer Quiz:...

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