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Sensitivity of the Penman-Monteith reference evapotranspiration to key climatic variables in
the Changjiang (Yangtze River) basin
By: Gong, LB (Gong, Lebing); Xu, CY (Xu, Chong-yu); Chen, DL (Chen, Deliang); Halldin, S (Halldin, Sven); Chen, YQD (Chen, Yongqin David)
117 Times Cited
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32 Cited References
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JOURNAL OF HYDROLOGY
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Volume: 329 Issue: 3-4 Pages: 620-629
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DOI: 10.1016/j.jhydrol.2006.03.027
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Published: OCT 15 2006
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Abstract
Sensitivity analysis is important in understanding the relative importance of climatic variables to the variation of reference evapotranspiration (ETref). In this
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study, a non-dimensional relative sensitivity coefficient was employed to predict responses of ETref to perturbations of four climatic variables in the
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Changjiang (Yangtze River) basin. ETref was estimated with the FAO-56 Penman-Monteith equation. A 41-year historical dataset of daily air temperature,
117 in Web of Science Core
Collection
wind speed, relative humidity and daily sunshine duration at 150 national meteorological observatory stations was used in the analysis. Results show that
47 in BIOSIS Citation Index
the response of ETref can be precisely predicted under perturbation of relative humidity or shortwave radiation by their sensitivity coefficients; the predictive
64 in Chinese Science Citation
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power under perturbations of air temperature and wind speed depended on the magnitude of the perturbation, season and region. The prediction errors
were much smaller than the seasonal and regional variation of their sensitivity coefficients. The sensitivity coefficient could also be used to predict the
0 in Data Citation Index
response of ETref to co-perturbation of several variables. The accuracy of the prediction increases from the lower to the upper region. Spatial variations of
0 in Russian Science Citation Index
long-term average monthly and yearly sensitivity coefficients were obtained by interpolation of station estimates. In general, relative humidity was the most
2 in SciELO Citation Index
sensitive variable, followed by shortwave radiation, air temperature and wind speed. The actual rank of the four climatic variables in terms of their sensitivity
varied with season and region. The large spatial variability of the sensitivity coefficients of all the climatic variables in the middle and tower regions of the
basin was to a large extent determined by the distinct wind-speed patterns in those two regions. (c) 2006 Elsevier B.V. All rights reserved.
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Keywords
Author Keywords: Penman-Monteith reference evapotranspiration; sensitivity coefficient; Changjiang basin; China
KeyWords Plus: COMPLEMENTARY RELATIONSHIP; REGIONAL EVAPOTRANSPIRATION; POTENTIAL EVAPOTRANSPIRATION; MODEL;
EVAPORATION; EQUATIONS; SURFACE; ERRORS
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Last 180 Days: 16
Author Information
Since 2013: 60
Reprint Address: Xu, CY (reprint author)
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Univ Oslo, Dept Geosci, Sem Saelands Vei 1,POB 1047, NO-0316 Oslo, Norway.
Addresses:
[ 1 ] Univ Oslo, Dept Geosci, NO-0316 Oslo, Norway
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Zhang, Dan. GRACE-Based
Hydrological Drought Evaluation of the
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[ 2 ] Uppsala Univ, Dept Earth Sci, S-75236 Uppsala, Sweden
Yangtze River Basin, China .
JOURNAL OF
HYDROMETEOROLOGY, MAR 2016.
[ 3 ] Univ Gothenburg, Dept Earth Sci, Gothenburg, Sweden
[ 4 ] Chinese Acad Sci, Nanjing Inst Geog & Limnol, Beijing 100864, Peoples R China
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[ 5 ] China Meteorol Adm, Lab Climate Studies, Natl Climate Ctr, Beijing, Peoples R China
[ 6 ] Chinese Univ Hong Kong, Dept Geog & Resource Management, Hong Kong, Hong Kong, Peoples R China
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E-mail Addresses: chongyu.xu@geo.uio.no
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ELSEVIER SCIENCE BV, PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
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Research Areas: Engineering; Geology; Water Resources
Web of Science Categories: Engineering, Civil; Geosciences, Multidisciplinary; Water Resources
Document Information
Document Type: Article
Language: English
Accession Number: WOS:000241295200022
ISSN: 0022-1694
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IDS Number: 095GC
Cited References in Web of Science Core Collection: 32
Times Cited in Web of Science Core Collection: 117
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