地质年代二氧化碳水平Geological Level of CO2 590 505 438408 360 286248213 144 65 2 8000 PALEOZOIC MESOZOIC CENOZOIC 侏罗纪 7000 恐龙时代 6000- Cambrian Ordovician Silurian Devonian Carboniferous Permian Triassic Cretaceous Tertiary (wdd) 5000 Quatemary 大气CO2浓度 4000 Atmospheric C02 平均全球温度 Ave.Global Temp. ammeradwaL reqop 3000 22℃ 2000 17c 1000 www.geocraft.com Temp.afterC.R.Sootese 390 ppm C02 after R.A.Bemer,2001 0 12℃ 600 500 400 300 200 100 0 Millions of Years Ago 20 Carbon dioxide after Berner(2001)&temperature after Scotese(2001;see also Boucot etal.,2004)Carbon dioxide after Berner (2001) & temperature after Scotese (2001; see also Boucot et al., 2004) 地质年代二氧化碳水平 Geological Level of CO2 平均全球温度 大气CO2浓度 390 ppm 侏罗纪 恐龙时代 20