The US carbon budget: Contributions from land-use change

被引：768
|
作者：
Houghton, RA [1 ]
Hackler, JL [1 ]
Lawrence, KT [1 ]
机构：
[1] Woods Hole Res Ctr, Woods Hole, MA 02543 USA
来源：
SCIENCE | 1999年 / 285卷 / 5427期
关键词：
D O I：
10.1126/science.285.5427.574
中图分类号：
O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];
学科分类号：
07 ; 0710 ; 09 ;
摘要：
The rates at which lands in the United States were cleared for agriculture, abandoned, harvested for wood, and burned were reconstructed from historical data for the period 1700-1990 and used in a terrestrial carbon model to calculate annual changes in the amount of carbon stored in terrestrial ecosystems, including wood products. Changes in land use released 27 +/- 6 petagrams of carbon to the atmosphere before 1945 and accumulated 2 +/- 2 petagrams of carbon after 1945, Largely as a result of fire suppression and forest growth on abandoned farmlands. During the 1980s, the net flux of carbon attributable to land management offset 10 to 30 percent of U.S. fossil fuel emissions.
引用
收藏
页码：574 / 578
页数：5
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