Satellite-derived increases in net primary productivity across North America, 1982-1998

被引：87

作者：

Hicke, JA ^{[1
]}

Asner, GP

Randerson, JT

Tucker, C

Los, S

Birdsey, R

Jenkins, JC

Field, C

Holland, E

机构：

[1] Univ Colorado, Dept Geol Sci, Boulder, CO 80309 USA

[2] CALTECH, Div Geol & Planetary Sci, Pasadena, CA 91125 USA

[3] CALTECH, Div Engn & Appl Sci, Pasadena, CA 91125 USA

[4] NASA, Goddard Space Flight Ctr, Lab Atmospher Phys, Greenbelt, MD 20771 USA

[5] USDA, Forest Serv, Newtown Sq, PA 19073 USA

[6] Carnegie Inst Washington, Stanford, CA 94305 USA

[7] Natl Ctr Atmospher Res, Boulder, CO 80305 USA

来源：

GEOPHYSICAL RESEARCH LETTERS | 2002年 / 29卷 / 10期

关键词：

D O I：

10.1029/2001GL013578

中图分类号：

P [天文学、地球科学];

学科分类号：

07 ;

摘要：

[1] We used a new 17-year, high spatial resolution satellite record and a carbon cycle model to explore how changing net primary productivity (NPP) contributed to a proposed carbon (C) sink in North America. We found a small but significant increase in NPP, 0.03 Pg C yr(-2) or 8% over 17 years, that could explain a substantial fraction of the C sink. The largest increases occurred in the central and southeastern United States, eastern Canada, and northwestern North America, and were consistent with NPP trends derived from forest inventories and crop yields. Interannual NPP variability was small, implying that the large interannual variability in the C sink found in previous studies were driven by changes in heterotrophic respiration.

引用

页数：4

共 29 条

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