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Satellite evidence for no change in terrestrial latent heat flux in the Three-River Headwaters region of China over the past three decades
Yao Y. J.; Zhao, S. H.; Wan, H. W.; Zhang, Y. H.; Jiang, B.; Jia, K.; Liu, M.; Wu, J. H.
Source PublicationJournal of Earth System Science
2016
Volume125
Issue6
Pages1245-1253
KeywordTerrestrial latent heat flux Three-River Headwaters region incident solar radiation precipitation energy-balance closure eddy-covariance tibetan plateau solar-radiation evapotranspiration algorithm modis grassland budget sites
AbstractTerrestrial latent heat flux (LE) in the Three-River Headwaters region (TRHR) of China plays an essential role in quantifying the amount of water evaporation and carbon sink over the high altitude Tibetan Plateau (TP). Global warming is expected to accelerate terrestrial hydrological cycle and to increase evaporation. However, direct field observations are lacking in this region and the long-term variability in LE remains uncertain. In this study, we have revised a semi-empirical Penman LE algorithm based on ground eddy covariance (EC) observations from an alpine grass site and provided new satellite-based evidence to assess LE change in the TRHR during 1982-2010. Our results show that the average annual terrestrial LE in the TRHR is about 38.8 W/m (2) and there is no statistically significant change in annual LE from 1982 to 2010. We also found that during the same time period, terrestrial LE over the east region of the TRHR significantly decreased, on average, by 0.7 W/m (2) per decade, which was driven primarily by the surface incident solar radiation (R (s) ) limitation, offsetting the increased LE over the west region of the TRHR caused by the increased precipitation (P) and soil moisture (SM).
Indexed BySCI
Language英语
ISSN0253-4126
DOI10.1007/s12040-016-0732-8
Citation statistics
Document TypeSCI/SSCI论文
Identifierhttp://ir.igsnrr.ac.cn/handle/311030/43364
Collection历年回溯文献
Recommended Citation
GB/T 7714
Yao Y. J.,Zhao, S. H.,Wan, H. W.,et al. Satellite evidence for no change in terrestrial latent heat flux in the Three-River Headwaters region of China over the past three decades. 2016.
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