The Carbon Cycle.

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Presentation transcript:

The Carbon Cycle

Radiative energy budget

Radiative energy budget

Global warming since 1860

Change in atmospheric CO2 (a) since 1958 (“Keeling curve”) (b) since 1750 (c) since 160,000 years ago

Global carbon cycles: reservoirs and fluxes Reservoirs in gigatons Fluxes in gigatons per year

Paleoclimatology: icehouse vs Paleoclimatology: icehouse vs. greenhouse periods Three scenarios: (1) icehouse: no liquid water (2) greenhouse: liquid water (with or without ice) (3) run-away greenhouse effect: only water vapor (Venus)