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首页> 外文期刊>Journal of Geophysical Research. Biogeosciences >Climate Extreme Versus Carbon Extreme: Responses of Terrestrial Carbon Fluxes to Temperature and Precipitation
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Climate Extreme Versus Carbon Extreme: Responses of Terrestrial Carbon Fluxes to Temperature and Precipitation

机译：气候极端与碳极值：陆地碳通量对温度和降水的反应

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摘要

Carbon fluxes at the land-atmosphere interface are strongly influenced by weather and climate conditions. Yet what is usually known as "climate extremes" does not always translate into very high or low carbon fluxes or so-called "carbon extremes." To reveal the patterns of how climate extremes influence terrestrial carbon fluxes, we analyzed the interannual variations in ecosystem carbon fluxes simulated by the Terrestrial Biosphere Models (TBMs) in the Inter-Sectoral Impact Model Intercomparison Project. At the global level, TBMs simulated reduced ecosystem net primary productivity (NPP; 18.5 ± 9.3 g C m~(-2) yr~(-1)), but enhanced heterotrophic respiration (Rh; 7 ± 4.6 g C m~(-2) yr~(-1)) during extremely hot events. TBMs also simulated reduced NPP (60.9 ± 24.4 g C m~(-2) yr~(-1)) and reduced Rh (16.5 ± 11.4 g C m~(-2) yr~(-1)) during extreme dry events. Influences of precipitation extremes on terrestrial carbon uptake were larger in the arid/semiarid zones than other regions. During hot extremes, ecosystems in the low latitudes experienced a larger reduction in carbon uptake. However, a large fraction of carbon extremes did not occur in concert with either temperature or precipitation extremes. Rather these carbon extremes are likely to be caused by the interactive effects of the concurrent temperature and precipitation anomalies. The interactive effects showed considerable spatial variations with the largest effects on NPP in South America and Africa. Additionally, TBMs simulated a stronger sensitivity of ecosystem productivity to precipitation than satellite estimates. This study provides new insights into the complex ecosystem responses to climate extremes, especially the emergent properties of carbon dynamics resulting from compound climate extremes.
机译：土地大气界面的碳通量受到天气和气候条件的强烈影响。然而，通常被称为“气候极端”并不总是转化为非常高或低碳磁通量或所谓的“碳极端”。为了揭示气候极端影响陆地碳通量的模式，我们分析了在跨部门影响模型互通项目中陆地生物圈模型（TBMS）模拟的生态系统碳通量的持续变化。在全球层面，TBMS模拟减少生态系统净初级生产率（NPP; 18.5±9.3g C m〜（-2）Yr〜（-1）），但增强了异养呼吸（RH; 7±4.6 g C m〜（ - 2）YR〜（-1））在极热的事件中。 TBMS还模拟了NPP的降低（60.9±24.4g C m〜（-2）Yr〜（-1）），并在极端干燥事件期间减少了RH（16.5±11.4g C m〜（-2）Yr〜（-1）） 。干旱/半干旱区的降水极端对陆地碳吸收的影响比其他地区更大。在热极端期间，低纬度的生态系统经历了碳吸收的更大减少。然而，大部分碳极端不与极端温度或沉淀极端的音乐会发生。相反，这些碳极端可能是由并发温度和沉淀异常的互动效应引起的。互动效果表明，南美洲和非洲的NPP对NPP的最大影响表现出相当大的空间变化。此外，TBMS模拟了生态系统生产力的更强烈敏感性，而不是卫星估计的降水。本研究向复杂的生态系统对气候极端反应提供了新的见解，特别是由复合气候极端引起的碳动力学的紧急性质。

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    Shufen Pan; Jia Yang; Hanqin Tian; Hao Shi; Jinfeng Chang; Philippe Ciais; Louis Francois; Katja Frieler; Bojie Fu; Thomas Hickler; Akihiko Ito; Kazuya Nishina; Sebastian Ostberg; Christopher P.O. Reyer; Sibyll Schaphoff; J?rg Steinkamp; Fang Zhao;

  • 作者单位

    International Center for Climate and Global Change Research School of Forestry and Wildlife Sciences Auburn University Auburn AL USA;

    International Center for Climate and Global Change Research School of Forestry and Wildlife Sciences Auburn University Auburn AL USA;

    International Center for Climate and Global Change Research School of Forestry and Wildlife Sciences Auburn University Auburn AL USA;

    International Center for Climate and Global Change Research School of Forestry and Wildlife Sciences Auburn University Auburn AL USA;

    Laboratoire des Sciences du Climat et de l'Environnement Gif-sur-Yvette France;

    Laboratoire des Sciences du Climat et de l'Environnement Gif-sur-Yvette France;

    UR-SPHERES Université de Liège Liège Belgium;

    Potsdam Institute for Climate Impact Research Member of the Leibniz Association Potsdam Germany;

    Research Center for Eco-Environmental Sciences State Key Laboratory of Urban and Regional Ecology Chinese Academy of Sciences Beijing China;

    Senckenberg Biodiversity and Climate Research Centre Frankfurt am Main Germany;

    National Institute for Environmental Studies Tsukuba Japan;

    National Institute for Environmental Studies Tsukuba Japan;

    Potsdam Institute for Climate Impact Research Member of the Leibniz Association Potsdam Germany;

    Potsdam Institute for Climate Impact Research Member of the Leibniz Association Potsdam Germany;

    Potsdam Institute for Climate Impact Research Member of the Leibniz Association Potsdam Germany;

    Senckenberg Biodiversity and Climate Research Centre Frankfurt am Main Germany;

    Potsdam Institute for Climate Impact Research Member of the Leibniz Association Potsdam Germany;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 生物分布与生物地理学;
  • 关键词

    Climate Extreme Versus; Terrestrial Carbon Fluxes; Temperature and Precipitation;

    机译：气候极端与;陆地碳通量;温度和降水;

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