Multi-decadal trends in global terrestrial evapotranspiration and its components

被引：748

作者：

Zhang, Yongqiang ^{[1
]}

Pena-Arancibia, Jorge L. ^{[1
]}

McVicar, Tim R. ^{[1
,2
,3
]}

Chiew, Francis H. S. ^{[1
]}

Vaze, Jai ^{[1
]}

Liu, Changming ^{[4
]}

Lu, Xingjie ^{[5
]}

Zheng, Hongxing ^{[1
]}

Wang, Yingping ^{[5
]}

Liu, Yi Y. ^{[2
,3
]}

Miralles, Diego G. ^{[6
,7
]}

Pan, Ming ^{[8
]}

机构：

[1] CSIRO Land & Water, Canberra, ACT 2601, Australia

[2] Univ New S Wales, ARC Ctr Excellence Climate Syst Sci, Sydney, NSW 2052, Australia

[3] Univ New S Wales, Climate Change Res Ctr, Sydney, NSW 2052, Australia

[4] Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Beijing 100101, Peoples R China

[5] CSIRO Ocean & Atmosphere, Aspendale, Vic 3195, Australia

[6] Vrije Univ Amsterdam, Dept Earth Sci, NL-1081 HV Amsterdam, Netherlands

[7] Univ Ghent, Dept Forest & Water Management, Lab Hydrol & Water Management, B-9000 Ghent, Belgium

[8] Princeton Univ, Dept Civil & Environm Engn, Princeton, NJ 08544 USA

来源：

SCIENTIFIC REPORTS | 2016年 / 6卷

基金：

澳大利亚研究理事会; 加拿大自然科学与工程研究理事会; 美国国家科学基金会;

关键词：

LEAF-AREA INDEX; RAINFALL INTERCEPTION; CENTRAL KALIMANTAN; EDDY COVARIANCE; WINTER-WHEAT; WATER-BUDGET; DATA SETS; SAP-FLOW; PART; FOREST;

D O I：

10.1038/srep19124

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

Evapotranspiration (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.

引用

页数：12

共 69 条

[51] Satellite-derived estimates of forest leaf area index in southwest Western Australia are not tightly coupled to interannual variations in rainfall: implications for groundwater decline in a drying climate [J].