globalchange  > 气候变化事实与影响
DOI: 10.1002/2017GB005744
Scopus记录号: 2-s2.0-85043387002
论文题名:
Satellite Chlorophyll Fluorescence and Soil Moisture Observations Lead to Advances in the Predictive Understanding of Global Terrestrial Coupled Carbon-Water Cycles
作者: Qiu B; , Xue Y; , Fisher J; B; , Guo W; , Berry J; A; , Zhang Y
刊名: Global Biogeochemical Cycles
ISSN: 8866236
出版年: 2018
卷: 32, 期:3
起始页码: 360
结束页码: 375
语种: 英语
英文关键词: gross primary production ; photosynthesis ; Simplified Simple Biosphere Model ; soil moisture ; Sun-induced chlorophyll fluorescence ; wilting point
英文摘要: The terrestrial carbon and water cycles are coupled through a multitude of connected processes among soil, roots, leaves, and the atmosphere. The strength and sensitivity of these couplings are not yet well known at the global scale, which contributes to uncertainty in predicting the terrestrial water and carbon budgets. We now have synchronous, global-scale satellite observations of critical terrestrial carbon and water cycle components: solar-induced chlorophyll fluorescence (SIF) and soil moisture. We used these observations within the framework of a global terrestrial biosphere model (Simplified Simple Biosphere Model version 2.0, SSiB2) to investigate carbon-water coupling processes. We updated SSiB2 to include a mechanistic representation of SIF and tested the sensitivity of model parameters to improve the simulation of both SIF and soil moisture with the ultimate objective of improving the first-order terrestrial carbon component, gross primary production. Although several vegetation parameters, such as leaf area index and the green leaf fraction, improved the simulated SIF, and several soil parameters, such as hydraulic conductivity, improved simulated soil moisture, their effects were mainly limited to their respective cycles. One root-mean-square error parameter emerged as the key coupler between the carbon and water cycles: the wilting point. Updates to the wilting point significantly improved the simulations for SIF and gross primary production although substantial mismatches with the satellite data still existed. This study demonstrates the value of synchronous global measurements of the terrestrial carbon and water cycles in improving the understanding of coupled carbon-water cycles. ©2018. American Geophysical Union. All Rights Reserved.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/77653
Appears in Collections:气候变化事实与影响

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作者单位: CMA-NJU Joint Laboratory for Climate Prediction Studies, Institute for Climate and Global Change Research, School of Atmospheric Sciences, Nanjing University, Nanjing, China; Department of Geography and Department of Atmospheric and Oceanic Sciences, University of California, Los Angeles, CA, United States; Jiangsu Provincial Key Laboratory of Geographic Information Science and Technology, International Institute for Earth System Sciences, Nanjing University, Nanjing, China; Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA, United States; Joint International Research Laboratory of Atmospheric and Earth System Sciences, Nanjing, China; Department of Global Ecology, Carnegie Institution of Washington, Stanford, CA, United States

Recommended Citation:
Qiu B,, Xue Y,, Fisher J,et al. Satellite Chlorophyll Fluorescence and Soil Moisture Observations Lead to Advances in the Predictive Understanding of Global Terrestrial Coupled Carbon-Water Cycles[J]. Global Biogeochemical Cycles,2018-01-01,32(3)
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