Analysis of spatial distribution and temporal trend of reference evapotranspiration... evaporation in Changjiang (Yangtze River) catchment

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Analysis of spatial distribution and temporal trend of reference evapotranspiration and pan
evaporation in Changjiang (Yangtze River) catchment
By: Xu, CY (Xu, Chong-yu); Gong, LB (Gong, Lebing); Jiang, T (Jiang, Tong); Chen, DL (Chen, Deliang); Singh, VP (Singh, V. P.)
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28 Cited References
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JOURNAL OF HYDROLOGY
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Volume: 327 Issue: 1-2 Pages: 81-93
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DOI: 10.1016/j.jhydrol.2005.11.029
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Published: JUL 30 2006
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Abstract
In this study the Penman-Monteith reference evapotranspiration, pan evaporation measured by a 20 cm pan, and pan coefficient, i.e., the ratio of Penman-
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Monteith evapotranspiration to pan evaporation, at 150 meteorological stations during 1960-2000 in the Changjiang (Yangtze River) catchment in China are
245 in All Databases
calculated, compared and regionally mapped. Their spatial distributions and temporal variations are examined and the causes for the variations are
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Collection
discussed. The spatial distributions of temporal trends in the reference evapotranspiration as well as in the meteorological variables that determine
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evapotranspiration are analyzed. The contributions of various meteorological variables to the temporal trend detected in the reference evapotranspiration
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and pan evaporation are then determined. The results show that: (1) the spatial distributions of reference evapotranspiration and pan evaporation are
roughly similar. Spatial correlation coefficients between the reference evapotranspiration and the pan evaporation are high for both the seasonal and annual
0 in Data Citation Index
values. The temporal correlation between the two estimates is higher in the lower (humid) region than in the upper (semi-arid) region. The spatial
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distribution pattern of the pan coefficient is significantly influenced by wind speed and relative humidity in the region. Higher values of the pan coefficient
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were found in the central area of the catchment with a relatively high humidity (as compared with the upper area) and a very low wind speed (as compared
with other areas); (2) for the whole catchment, there is a significant decreasing trend in both the reference evapotranspiration and the pan evaporation,
which is mainly caused by a significant decrease in the net total radiation and to a lesser extent by a significant decrease in the wind speed over the
catchment. No temporal trend is detected for the pan coefficient; (3) sensitivity analysis shows that the reference evapotranspiration is most sensitive to the
net total radiation, followed by relative humidity, air temperature and wind speed. (c) 2005 Elsevier B.V. All rights reserved.
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Keywords
Author Keywords: pan evaporation; reference evapotranspiration; Penman-Monteith method; trend analysis; Changjinag catchment; China
KeyWords Plus: COMPLEMENTARY RELATIONSHIP; REGIONAL EVAPOTRANSPIRATION; MODELS; SENSITIVITY; INTERPOLATION; CLIMATE;
ERRORS; CHINA
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Author Information
Reprint Address: Xu, CY (reprint author)
Chinese Acad Sci, Nanjing Inst Geog & Limnol, 73 E Beijing Rd, Nanjing 210008, Peoples R China.
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Liu, Jianguo. Ensemble simulation of
land evapotranspiration in China
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[ 1 ] Chinese Acad Sci, Nanjing Inst Geog & Limnol, Nanjing 210008, Peoples R China
[ 2 ] Univ Oslo, Dept Geosci, N-0316 Oslo, Norway
based on a multi-forcing and multimodel approach . ADVANCES IN
ATMOSPHERIC SCIENCES, JUN
2016.
[ 3 ] Uppsala Univ, Dept Earth Sci, Uppsala, Sweden
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[ 4 ] Univ Gothenburg, Dept Earth Sci, Gothenburg, Sweden
[ 5 ] Louisiana State Univ, Dept Civil & Environm Engn, Baton Rouge, LA 70803 USA
[ 6 ] China Meteorol Adm, Lab Climate Studies, Natl Climate Ctr, Beijing, 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
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Document Information
Document Type: Article
Language: English
Accession Number: WOS:000239671700007
ISSN: 0022-1694
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IDS Number: 072KG
Cited References in Web of Science Core Collection: 28
Times Cited in Web of Science Core Collection: 201
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