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Seasonal evapotranspiration changes (1983-2006) of four large basins on the Tibetan Plateau

Li, X. P.; Wang, L.; Chen, Deliang; Yang, K. and Wang, A. H. (2014) In Journal of Geophysical Research: Atmospheres 119(23). p.13079-13095
Abstract
Lack of reliable historical basin-scale evapotranspiration (ET) estimates is a bottleneck for water balance analyses and model evaluation on the Tibetan Plateau (TP). This study looks at four large basins on the TP to develop a general approach suitable for large river basins to estimate historical monthly ET. Five existing global ET products are evaluated against monthly ET estimated by the water balance method as a residual from precipitation (P), terrestrial water storage change (Delta S), and discharge (R). The five ET products exhibit similar seasonal variability, despite of the different amounts among them. A bias correction method, based on the probability distribution mapping between the reference ET and the five products during... (More)
Lack of reliable historical basin-scale evapotranspiration (ET) estimates is a bottleneck for water balance analyses and model evaluation on the Tibetan Plateau (TP). This study looks at four large basins on the TP to develop a general approach suitable for large river basins to estimate historical monthly ET. Five existing global ET products are evaluated against monthly ET estimated by the water balance method as a residual from precipitation (P), terrestrial water storage change (Delta S), and discharge (R). The five ET products exhibit similar seasonal variability, despite of the different amounts among them. A bias correction method, based on the probability distribution mapping between the reference ET and the five products during 2003-2012, effectively removes nearly all biases and significantly increases the reliability of the products. Then, the surface water balance changes for the four basins are analyzed based on the corrected ET products as well as observed P and R during 1983-2006. A trend analysis shows an upward trend for ET in the four basins for all seasons during the past three decades, along with the regional warming, as well as a dominating increasing trend in P and negative trend in R. (Less)
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author
publishing date
type
Contribution to journal
publication status
published
subject
keywords
TRENDS, CYCLE, REGIONS, GRAVITY, RIVER-BASINS, UNITED-STATES, CLIMATE-CHANGE, GRACE MEASUREMENTS, CONTINENTAL WATER STORAGE, Meteorology & Atmospheric Sciences, UNCERTAINTY
in
Journal of Geophysical Research: Atmospheres
volume
119
issue
23
pages
13079 - 13095
publisher
Wiley-Blackwell
external identifiers
  • scopus:84919838156
ISSN
2169-8996
DOI
10.1002/2014jd022380
project
MERGE
language
English
LU publication?
no
id
e81b7466-89ed-4732-9f02-07873fd6377a (old id 7515328)
date added to LUP
2015-07-08 14:57:26
date last changed
2017-09-10 04:44:38
@article{e81b7466-89ed-4732-9f02-07873fd6377a,
  abstract     = {Lack of reliable historical basin-scale evapotranspiration (ET) estimates is a bottleneck for water balance analyses and model evaluation on the Tibetan Plateau (TP). This study looks at four large basins on the TP to develop a general approach suitable for large river basins to estimate historical monthly ET. Five existing global ET products are evaluated against monthly ET estimated by the water balance method as a residual from precipitation (P), terrestrial water storage change (Delta S), and discharge (R). The five ET products exhibit similar seasonal variability, despite of the different amounts among them. A bias correction method, based on the probability distribution mapping between the reference ET and the five products during 2003-2012, effectively removes nearly all biases and significantly increases the reliability of the products. Then, the surface water balance changes for the four basins are analyzed based on the corrected ET products as well as observed P and R during 1983-2006. A trend analysis shows an upward trend for ET in the four basins for all seasons during the past three decades, along with the regional warming, as well as a dominating increasing trend in P and negative trend in R.},
  author       = {Li, X. P. and Wang, L. and Chen, Deliang and Yang, K. and Wang, A. H.},
  issn         = {2169-8996},
  keyword      = {TRENDS,CYCLE,REGIONS,GRAVITY,RIVER-BASINS,UNITED-STATES,CLIMATE-CHANGE,GRACE MEASUREMENTS,CONTINENTAL WATER STORAGE,Meteorology & Atmospheric Sciences,UNCERTAINTY},
  language     = {eng},
  number       = {23},
  pages        = {13079--13095},
  publisher    = {Wiley-Blackwell},
  series       = {Journal of Geophysical Research: Atmospheres},
  title        = {Seasonal evapotranspiration changes (1983-2006) of four large basins on the Tibetan Plateau},
  url          = {http://dx.doi.org/10.1002/2014jd022380},
  volume       = {119},
  year         = {2014},
}