Carbon cycle-climate warming feedback 平 06 [Mauna Loa Data from Keeling and Whorf (1994)] 380 Global Temperatures 0.4 Annual Average 03 -Five Year Average 02 70 04 1960 19701980 19902000 Year 0.6 18601880190019201940196 9802000 EcosystemCarbon cycle-climate warming feedback [ Mauna Loa Data from Keeling and Whorf (1994) ] Year 1960 1970 1980 1990 2000 CO2 Concentration (ppmv) 310 320 330 340 350 360 370 380 Ecosystem + + +