globalchange  > 气候减缓与适应
DOI: 10.1038/ngeo2957
论文题名:
Regionally strong feedbacks between the atmosphere and terrestrial biosphere
作者: Green J.K.; Konings A.G.; Alemohammad S.H.; Berry J.; Entekhabi D.; Kolassa J.; Lee J.-E.; Gentine P.
刊名: Nature Geoscience
ISSN: 17520894
出版年: 2017
卷: 10, 期:6
起始页码: 410
结束页码: 414
语种: 英语
Scopus关键词: atmosphere-biosphere interaction ; boundary layer ; carbon dioxide ; convection ; evapotranspiration ; phenology ; precipitation intensity ; semiarid region ; sensible heat flux ; water availability
英文摘要: The terrestrial biosphere and atmosphere interact through a series of feedback loops. Variability in terrestrial vegetation growth and phenology can modulate fluxes of water and energy to the atmosphere, and thus affect the climatic conditions that in turn regulate vegetation dynamics. Here we analyse satellite observations of solar-induced fluorescence, precipitation, and radiation using a multivariate statistical technique. We find that biosphere-atmosphere feedbacks are globally widespread and regionally strong: They explain up to 30% of precipitation and surface radiation variance in regions where feedbacks occur. Substantial biosphere-precipitation feedbacks are often found in regions that are transitional between energy and water limitation, such as semi-arid or monsoonal regions. Substantial biosphere-radiation feedbacks are often present in several moderately wet regions and in the Mediterranean, where precipitation and radiation increase vegetation growth. Enhancement of latent and sensible heat transfer from vegetation accompanies this growth, which increases boundary layer height and convection, affecting cloudiness, and consequently incident surface radiation. Enhanced evapotranspiration can increase moist convection, leading to increased precipitation. Earth system models underestimate these precipitation and radiation feedbacks mainly because they underestimate the biosphere response to radiation and water availability. We conclude that biosphere-atmosphere feedbacks cluster in specific climatic regions that help determine the net CO2 balance of the biosphere. © 2017 Macmillan Publishers Limited, part of Springer Nature.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/105767
Appears in Collections:气候减缓与适应
科学计划与规划

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作者单位: Department of Earth and Environmental Engineering, Columbia University, New York, NY, United States; Department of Earth System Science, Stanford University, Stanford, CA, United States; Department of Civil and Environmental Engineering, Massachusetts Institute of Technology, Cambridge, MA, United States; Department of Global Ecology, Carnegie Institution of Washington, Stanford, CA, United States; Department of Earth, Atmospheric and Planetary Sciences, Massachusetts Institute of Technology, Cambridge, MA, United States; Universities Space Research Association, Columbia, MD, United States; Global Modeling and Assimilation Office, NASA Goddard Space Flight Center, Greenbelt, MD, United States; Department of Earth, Environment and Planetary Sciences, Brown University, Providence, RI, United States; Earth Institute, Columbia University, New York, NY, United States

Recommended Citation:
Green J.K.,Konings A.G.,Alemohammad S.H.,et al. Regionally strong feedbacks between the atmosphere and terrestrial biosphere[J]. Nature Geoscience,2017-01-01,10(6)
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