DOI: 10.2166/wcc.2017.134
论文题名: Validation of evapotranspiration and its long-term trends in the yellow river source region
作者: Liu R. ; Wen J. ; Wang X. ; Wang Z.
刊名: Journal of Water and Climate Change
ISSN: 20402244
出版年: 2017
卷: 8, 期: 3 起始页码: 495
结束页码: 509
语种: 英语
英文关键词: Evapotranspiration
; Long-term trend
; Reanalysis data sets
; Yellow River source region
英文摘要: In this paper, the ground observations were compared to the ERA-Interim, NCEP-DOE AMIP-II Reanalysis, MODIS ET product, and emerging offline SEBS ET data sets in the Yellow River source region of the Tibet Plateau. In general, the slopes of linear least squares exhibit differences, with ERAInterim, NCEP-DOE, MOD16, and SEBS slopes of 0.88± 0.05, 0.64±0.07, 0.66±0.17, and 1.24± 0.97 respectively. ERA-Interim was found superior with ground observations to others; therefore, it provided a good representation of the study area. Based on the ERA-Interim ET product, the Sen’s slope estimator and the Mann-Kendall (MK) test were applied to quantify the significance of the shifts in trends, while the moving t-test and MK test characterized abrupt changes. The results show that the Yellow River source region experienced a statistical increase in evapotranspiration (ET) in the northern part and a decrease in the southern part of the region from 1979 to 2014 at rates of approximately 1.65 and -0.50 mm/yr, respectively. The shift in the annual ET trend was more pronounced, and abrupt changes were detected in the 1980s. Precipitation was the most dominant factor affecting ET variation, whereas surface temperature was the least influential. © IWA Publishing 2017. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/67544
Appears in Collections: 气候减缓与适应
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作者单位: Key Laboratory of Land Surface Process and Climate Change in Cold and Arid Regions, Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, Lanzhou, China; College of Atmospheric Sciences, Plateau Atmosphere and Environment Key Laboratory of Sichuan Province, Chengdu University of Information Technology, Chengdu, Sichuan, China
Recommended Citation:
Liu R.,Wen J.,Wang X.,et al. Validation of evapotranspiration and its long-term trends in the yellow river source region[J]. Journal of Water and Climate Change,2017-01-01,8(3)