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Multi-decadal trends in global terrestrial evapotranspiration and its components
Zhang Y. Q.; Pena-Arancibia, J. L.; Mcvicar, T. R.; Chiew, F. H. S.; Vaze, J.; Liu, C. M.; Lu, X. J.; Zheng, H. X.; Wang, Y. P.; Liu, Y. Y.; Miralles, D. G.; Pan, M.
Source PublicationScientific Reports
Keywordamazonian rain-forest leaf-area index central kalimantan interception loss soil evaporation eddy covariance winter-wheat water-budget data sets sap-flow
AbstractEvapotranspiration (ET) is the process by which liquid water becomes water vapor and energetically this accounts for much of incoming solar radiation. If this ET did not occur temperatures would be higher, so understanding ET trends is crucial to predict future temperatures. Recent studies have reported prolonged declines in ET in recent decades, although these declines may relate to climate variability. Here, we used a well-validated diagnostic model to estimate daily ET during 1981-2012, and its three components: transpiration from vegetation (Et), direct evaporation from the soil (E-s) and vaporization of intercepted rainfall from vegetation (E-i). During this period, ET over land has increased significantly (p < 0.01), caused by increases in E-t and E-i, which are partially counteracted by E-s decreasing. These contrasting trends are primarily driven by increases in vegetation leaf area index, dominated by greening. The overall increase in E-t over land is about twofold of the decrease in E-s. These opposing trends are not simulated by most Coupled Model Intercomparison Project phase 5 (CMIP5) models, and highlight the importance of realistically representing vegetation changes in earth system models for predicting future changes in the energy and water cycle.
Indexed BySCI
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Cited Times:101[WOS]   [WOS Record]     [Related Records in WOS]
Document TypeSCI/SSCI论文
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GB/T 7714
Zhang Y. Q.,Pena-Arancibia, J. L.,Mcvicar, T. R.,et al. Multi-decadal trends in global terrestrial evapotranspiration and its components. 2016.
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