期刊
SCIENCE
卷 333, 期 6045, 页码 988-993出版社
AMER ASSOC ADVANCEMENT SCIENCE
DOI: 10.1126/science.1201609
关键词
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资金
- U.S. Forest Service, NASA [31021001]
- National Basic Research Program of China on Global Change [2010CB50600]
- Gordon and Betty Moore Foundation
- Peking Univ.
- Princeton Univ.
- Direct For Social, Behav & Economic Scie
- Division Of Behavioral and Cognitive Sci [0810837] Funding Source: National Science Foundation
- Directorate For Geosciences
- Office of Polar Programs (OPP) [652838] Funding Source: National Science Foundation
- Division Of Environmental Biology
- Direct For Biological Sciences [1026415] Funding Source: National Science Foundation
- Natural Environment Research Council [NE/D000300/1, NE/B504630/1, NE/B503384/1] Funding Source: researchfish
The terrestrial carbon sink has been large in recent decades, but its size and location remain uncertain. Using forest inventory data and long-term ecosystem carbon studies, we estimate a total forest sink of 2.4 +/- 0.4 petagrams of carbon per year (Pg C year(-1)) globally for 1990 to 2007. We also estimate a source of 1.3 +/- 0.7 Pg C year(-1) from tropical land-use change, consisting of a gross tropical deforestation emission of 2.9 +/- 0.5 Pg C year(-1) partially compensated by a carbon sink in tropical forest regrowth of 1.6 +/- 0.5 Pg C year(-1). Together, the fluxes comprise a net global forest sink of 1.1 +/- 0.8 Pg C year(-1), with tropical estimates having the largest uncertainties. Our total forest sink estimate is equivalent in magnitude to the terrestrial sink deduced from fossil fuel emissions and land-use change sources minus ocean and atmospheric sinks.
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