Fan S, Gloor M, Mahlman J, Pacala S, Sarmiento J, Takahashi T, Tans P
S. Fan and J. Sarmiento, Atmospheric and Oceanic Sciences Program, Princeton University, Princeton, NJ 08544, USA. M. Gloor and S. Pacala, Department of Ecology and Evolutionary Biology, Princeton University, Princeton, NJ 08542, USA. J. Mahlm.
Science. 1998 Oct 16;282(5388):442-6. doi: 10.1126/science.282.5388.442.
Atmospheric carbon dioxide increased at a rate of 2.8 petagrams of carbon per year (Pg C year-1) during 1988 to 1992 (1 Pg = 10(15) grams). Given estimates of fossil carbon dioxide emissions, and net oceanic uptake, this implies a global terrestrial uptake of 1.0 to 2. 2 Pg C year-1. The spatial distribution of the terrestrial carbon dioxide uptake is estimated by means of the observed spatial patterns of the greatly increased atmospheric carbon dioxide data set available from 1988 onward, together with two atmospheric transport models, two estimates of the sea-air flux, and an estimate of the spatial distribution of fossil carbon dioxide emissions. North America is the best constrained continent, with a mean uptake of 1.7 +/- 0.5 Pg C year-1, mostly south of 51 degrees north. Eurasia-North Africa is relatively weakly constrained, with a mean uptake of 0.1 +/- 0.6 Pg C year-1. The rest of the world's land surface is poorly constrained, with a mean source of 0.2 +/- 0.9 Pg C year-1.
1988年至1992年期间，大气中的二氧化碳以每年2.8皮克碳（Pg C year-1）的速度增加（1 Pg = 10的15次方克）。根据化石二氧化碳排放量和海洋净吸收量的估计，这意味着全球陆地每年吸收1.0至2.2皮克碳。陆地二氧化碳吸收的空间分布是通过1988年以来可获得的大气二氧化碳大幅增加数据集的观测空间模式，结合两个大气传输模型、两个海气通量估计值以及化石二氧化碳排放空间分布的估计值来估算的。北美是限制条件最好的大陆，平均每年吸收1.7±0.5皮克碳，主要在北纬51度以南。欧亚大陆 - 北非的限制相对较弱，平均每年吸收0.1±0.6皮克碳。世界其他陆地表面的限制较差，平均每年排放0.2±0.9皮克碳。
