DYNAMICS OF SOIL CARBON DURING DEGLACIATION OF THE LAURENTIDE ICE-SHEET

被引：161
|
作者：
HARDEN, JW
SUNDQUIST, ET
STALLARD, RF
MARK, RK
机构：
[1] US GEOL SURVEY, WOODS HOLE, MA 02543 USA
[2] US GEOL SURVEY, DENVER FED CTR, DENVER, CO 80225 USA
来源：
SCIENCE | 1992年 / 258卷 / 5090期
关键词：
D O I：
10.1126/science.258.5090.1921
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：
Deglaciation of the Laurentide Ice Sheet in North America was accompanied by sequestration of organic carbon in newly exposed soils. The greatest rate of land exposure occurred around 12,000 to 8,000 years ago, and the greatest increase in the rate of carbon sequestration by soils occurred from 8,000 to 4,000 years ago. Sequestration of carbon in deglaciated peat lands continues today, and a steady state has not been reached. The natural rate of carbon sequestration in soils, however, is small relative to the rate of anthropogenic carbon dioxide production.
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页码：1921 / 1924
页数：4
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