DOI: 10.1002/jgrd.50693
论文题名: Diagnostic analysis of interannual variation of global land evapotranspiration over 1982-2011: Assessing the impact of ENSO
作者: Yan H. ; Yu Q. ; Zhu Z.-C. ; Myneni R.B. ; Yan H.-M. ; Wang S.-Q. ; Shugart H.H.
刊名: Journal of Geophysical Research Atmospheres
ISSN: 21698996
出版年: 2013
卷: 118, 期: 16 起始页码: 8969
结束页码: 8983
语种: 英语
Scopus关键词: Atmospheric pressure
; Data processing
; Evapotranspiration
; Rain
; Water supply
; Diagnostic analysis
; Global historical climatology network
; Global precipitation
; Global precipitation climatology projects
; Interannual variation
; Partial correlation
; Potential evaporation
; Southern oscillation index
; Climatology
; annual variation
; atmospheric modeling
; canopy reflectance
; ensemble forecasting
; evapotranspiration
; leaf area index
; precipitation (climatology)
; Southern Oscillation
; Delaware
; United States
英文摘要: Global land evapotranspiration (E) between 1982 and 2011 was estimated by using a canopy conductance-based process E model (Air Relative Humidity-Based Two-Source model) [Yan et al., 2012]. To analyze the impact of precipitation forcing on E, an ensemble of six E data sets was derived from a driving ensemble of six precipitation data sets (i.e., Global Historical Climatology Network, Global Precipitation Climatology Centre, Climate Research Unit, Global Dataset of Meteorological Forcings, Global Precipitation Climatology Project, and Delaware). The result shows that ensemble average E over global land had an annual mean of 64.8 ± 0.8 × 103km3 yr -1 and a significant linear trend of 4.6mm per decade (p<0.01). Significant partial correlations were found between the ensemble average E and its three controlling variables (i.e., precipitation (Pr ), vegetation leaf area index (Lai), and potential evaporation (Ep )). These correlations explained 95% of the interannual variation of global land E with Pr as the dominant forcing contributing 37% variation of E; i.e., global land E was slightly sensitive to Pr than Lai and Ep . Pr , Lai , and Ep all showed increases of 8.8mm (p<0.01), 0.4m2m-2 (p<0.01), and 2.0mm (p<0.1) per decade, respectively, which characterized a favorable environment for the increase of E over past 30 years. Both negative Multivariate El Niño-Southern Oscillation (ENSO) Index (MEI) and Southern Oscillation Index (SOI) displayed an increasing trend. The La Niña phase tended to be dominant from 1982 to 2011 and caused a significant increase of land P r and further enhanced land E. Impacts of ENSO and corresponding Pr variation require attention to increase the understanding of the interannual variation of global land E. © 2013. Her Majesty the Queen in Right of Canada. American Geophysical Union.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/63373
Appears in Collections: 影响、适应和脆弱性 气候减缓与适应
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作者单位: National Meteorological Center, China Meteorological Administration, 46 Zhongguancun South St., Haidian District, 100081 Beijing, China; Environmental Sciences Department, University of Virginia, Charlottesville, VA, United States; Department of Earth and Environment, Boston University, Boston, MA, United States; Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing, China
Recommended Citation:
Yan H.,Yu Q.,Zhu Z.-C.,et al. Diagnostic analysis of interannual variation of global land evapotranspiration over 1982-2011: Assessing the impact of ENSO[J]. Journal of Geophysical Research Atmospheres,2013-01-01,118(16)