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)