globalchange  > 气候变化事实与影响
DOI: 10.1002/2014GB005022
Scopus记录号: 2-s2.0-85027921993
论文题名:
A comparison of plot-based satellite and Earth system model estimates of tropical forest net primary production
作者: Cleveland C; C; , Taylor P; , Chadwick K; D; , Dahlin K; , Doughty C; E; , Malhi Y; , Smith W; K; , Sullivan B; W; , Wieder W; R; , Townsend A; R
刊名: Global Biogeochemical Cycles
ISSN: 8866236
出版年: 2015
卷: 29, 期:5
起始页码: 626
结束页码: 644
语种: 英语
英文关键词: Amazon Basin ; carbon cycle ; net primary production ; tropical forest
Scopus关键词: carbon cycle ; carbon dioxide ; comparative study ; global change ; net primary production ; phytomass ; satellite data ; tropical forest ; Amazon Basin
英文摘要: Net primary production (NPP) by plants represents the largest annual flux of carbon dioxide (CO2) from the atmosphere to the terrestrial biosphere, playing a critical role in the global carbon (C) cycle and the Earth's climate. Rates of NPP in tropical forests are thought to be among the highest on Earth, but debates about the magnitude, patterns, and controls of NPP in the tropics highlight uncertainty in our understanding of how tropical forests may respond to environmental change. Here, we compared tropical NPP estimates generated using three common approaches: (1) field-based methods scaled from plot-level measurements of plant biomass, (2) radiation-based methods that model NPP from satellite-derived radiation absorption by plants, (3) and biogeochemical model-based methods. For undisturbed tropical forests as a whole, the three methods produced similar NPP estimates (i.e., ∼ 10 Pg C yr-1). However, the three different approaches produced vastly different patterns of NPP both in space and through time, suggesting that our understanding of tropical NPP is poor and that our ability to predict the response of NPP in the tropics to environmental change is limited. To address this shortcoming, we suggest the development of an expanded, high-density, permanent network of sites where NPP is continuously evaluated using multiple approaches. Well-designed NPP megatransects that include a high-density plot network would significantly increase the accuracy and certainty in the observed rates and patterns of tropical NPP and improve the reliability of Earth system models used to predict NPP-carbon cycle-climate interactions into the future. ©2015. 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/77977
Appears in Collections:气候变化事实与影响

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作者单位: Department of Ecosystem and Conservation Sciences, University of Montana, Missoula, MT, United States; Institute of Arctic and Alpine Research, Department of Ecology and Evolutionary Biology, University of Colorado Boulder, Boulder, CO, United States; Nicholas School of the Environment, Duke University, Durham, NC, United States; Department of Global Ecology, Carnegie Institution for Science, Stanford, CA, United States; Department of Earth System Science, Stanford University, Stanford, CA, United States; Climate and Global Dynamics Division and Advanced Study Program, National Center for Atmospheric Research, Boulder, CO, United States; Department of Geography, Michigan State University, East Lansing, MI, United States; Environmental Change Institute, School of Geography and the Environment, University of Oxford University, Oxford, United Kingdom; Department of Natural Resources and Environmental Sciences, University of Nevada, Reno, NV, United States; Climate and Global Dynamics Division, National Center for Atmospheric Research, Boulder, CO, United States

Recommended Citation:
Cleveland C,C,, Taylor P,et al. A comparison of plot-based satellite and Earth system model estimates of tropical forest net primary production[J]. Global Biogeochemical Cycles,2015-01-01,29(5)
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