370 360 350 340 C02 330 320 310 300 290 280 270 260 冒最是罩员最晨最晨晨 Year (m) Temperature Index 6 (land-ocean) 2 temperature Annual Mean 5-year Mean (a) (b) 1900 1920 1940 1960 1980 2000 1960 1980 2000 Year YearCO2 temperature