Long-distance atmospheric moisture dominates water budget in permafrost regions of the Central Qinghai-Tibet plateau

doi:10.1002/hyp.13871

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	Long-distance atmospheric moisture dominates water budget in permafrost regions of the Central Qinghai-Tibet plateau
	Zhu, Xiaofan 3; Wu, Tonghua 3; Hu, Guojie 3; Wang, Shengjie 2; Wu, Xiaodong 3; Li, Ren 3; Wang, Weiguo 1,4; Wen, Amin 1,3; Ni, Jie 1,3; Li, Xiangfei 1,3
	2020-10-30
关键词	Atmospheric humidity Atmospheric thermodynamics Budget control Lakes Permafrost Soil moisture TranspirationAtmospheric moisture Ground surface condition Hydrothermal conditions Permafrost hydrology Plant transpiration Qinghai Tibet plateau Spatial variability Surrounding regions
卷号	34
期号	22
DOI	10.1002/hyp.13871
页码	4280-4294
英文摘要	Precipitation plays an important role in permafrost hydrology; it can alter the hydrothermal condition of the active layer and even influence the permafrost aggradation or degradation. Moisture recycling from evaporation and transpiration can greatly contribute to local precipitation in some regions. This study selected four monitoring sites and used an isotope mixing model to investigate local moisture recycling in permafrost regions of the central Qinghai-Tibet Plateau (QTP). The results showed that the local water vapour flux in the summer and autumn were dominantly influenced by westerlies and the Indian monsoon. Moistures for precipitation in Wudaoliang (WDL) and Fenghuoshan (FHS) mainly came from the western QTP, eastern Tianshan Mountains, western Qilian Mountains, and the surrounding regions. In comparsion, more than half of precipitation at Tanggula (TGL) was mostly sourced from the Indian monsoon. Local moisture recycling ratios at the four sites ranged from 14% ± 3.8% to 31.6% ± 4.8%, and depended on the soil moisture and relative humidity. In particular, the higher soil moisture and relative humidity promoted local moisture recycling, but frozen ground might be a potential influencing factor as well. The moisture recycling ratios of the study area were consistent with the results from both the Qinghai Lake Basin and the Nam Co Basin, but differed from those of the northwestern QTP. This difference may indirectly confirm the great spatial variability in precipitation on the QTP. Moreover, the rising air temperature and ground temperature, increasing precipitation, higher soil moisture, higher vegetation cover, and expanding lakes in the study area may be conductive to enhancing future local moisture recycling by altering ground surface conditions and facilitating the land surface evaporation and plant transpiration. © 2020 John Wiley & Sons Ltd
会议录	Hydrological Processes
会议录出版者	John Wiley and Sons Ltd
语种	英语
ISSN号	08856087
内容类型	会议论文
源URL	[http://ir.lut.edu.cn/handle/2XXMBERH/132639]
专题	土木工程学院
作者单位	1.University of Chinese Academy of Sciences, Beijing, China; 2.College of Geography and Environmental Science, Northwest Normal University, Lanzhou, China; 3.Cryosphere Research Station on the Qinghai-Tibet Plateau, State Key Laboratory of Cryospheric Science, Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou, China; 4.Key Laboratory of Remote Sensing of Gansu Province, Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou, China; 5.School of Civil Engineering, Lanzhou University of Technology, Lanzhou, China
推荐引用方式 GB/T 7714	Zhu, Xiaofan,Wu, Tonghua,Hu, Guojie,et al. Long-distance atmospheric moisture dominates water budget in permafrost regions of the Central Qinghai-Tibet plateau[C]. 见:.