Spatial and temporal variations in global soil respiration and their relationships with climate and land cover

被引：119
|
作者：
Huang, Ni [1 ]
Wang, Li [1 ]
Song, Xiao-Peng [2 ]
Black, T. Andrew [3 ]
Jassal, Rachhpal S. [3 ]
Myneni, Ranga B. [4 ]
Wu, Chaoyang [5 ]
Wang, Lei [1 ]
Song, Wanjuan [1 ]
Ji, Dabin [1 ]
Yu, Shanshan [1 ]
Niu, Zheng [1 ,6 ]
机构：
[1] Beijing Normal Univ, Chinese Acad Sci, Aerosp Informat Res Inst, State Key Lab Remote Sensing Sci, Beijing, Peoples R China
[2] Texas Tech Univ, Dept Geosci, Lubbock, TX 79409 USA
[3] Univ British Columbia, Fac Land & Food Syst, Vancouver, BC, Canada
[4] Boston Univ, Dept Earth & Environm, Boston, MA 02215 USA
[5] Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Land Surface Pattern & Simulat, Beijing, Peoples R China
[6] Univ Chinese Acad Sci, Beijing, Peoples R China
来源：
SCIENCE ADVANCES | 2020年 / 6卷 / 41期
基金：
中国国家自然科学基金;
关键词：
HETEROTROPHIC RESPIRATION; TEMPERATURE SENSITIVITY; INTERANNUAL VARIABILITY; CARBON; FOREST; MULTIYEAR; PATTERNS; NITROGEN; IMPACTS; CO2;
D O I：
10.1126/sciadv.abb8508
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：
Soil respiration (Rs) represents the largest flux of CO2 from terrestrial ecosystems to the atmosphere, but its spatial and temporal changes as well as the driving forces are not well understood. We derived a product of annual global Rs from 2000 to 2014 at 1 km by 1 km spatial resolution using remote sensing data and biome-specific statistical models. Different from the existing view that climate change dominated changes in R-s, we showed that land-cover change played a more important role in regulating R-s changes in temperate and boreal regions during 2000-2014. Significant changes in R-s occurred more frequently in areas with significant changes in short vegetation cover (i.e., all vegetation shorter than 5 m in height) than in areas with significant climate change. These results contribute to our understanding of global Rs patterns and highlight the importance of land-cover change in driving global and regional Rs changes.
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页数：11
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