Increased biotic metabolism of the biosphere inferred from observed data and models

作     者：田汉勤 CharlesA.S.Hall 叶琦 

作者机构：The Ecosystems Center Marine Biological Laboratory Woods Hole MA 02543 USA College of Environmental Sciences and Forestry State University of New York Syracuse NY 13210 USA Department of Environmental Science Policy and Management University of California Berkeley CA 94720 USA 

出 版 物：《Science China Chemistry》 (中国科学（化学英文版）)

年 卷 期：2000年第43卷第1期

页      面：58-68页

核心收录：

学科分类：07[理学] 09[农学] 0903[农学-农业资源与环境] 0713[理学-生态学] 

主　　题：biosphere carbon dioxide carbon cycle global change photosynthesis respiration seasonal amplitude. 

摘      要：A 35 year record of production and respiration in the Northern Hemisphere bas been derived from monthly records of atmospheric concentration, fossil fuel combustion, and oceanic absorption of carbon dioxide using a method developed by Hall et al. The original conclusion of Hall et al. that there was no significant change in biotic metabolism, is confirmed by measuring both production and respiration from 1958 to 1972. But the analysis of the subsequent record shows that both production and respiration have been enhanced since the early 1970s by some large scale global change, probably of human origin. Our results also show that high-latitude regions in the Northern Hemisphere are changing more than regions further south. Nevertheless, the ratio of production to respiration (P/R) remains unchanged during the time period examined. Thus, no argument can be made for net carbon storage of or release from the biosphere from this analysis, although the turnover rate of the biosphere appears to be enhanced.