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	Impacts of Summer Extreme Precipitation Events on the Hydrothermal Dynamics of the Active Layer in the Tanggula Permafrost Region on the Qinghai-Tibetan Plateau
	Zhu, Xiaofan1,2; Wu, Tonghua1; Li, Ren1; Xie, Changwei1; Hu, Guojie1; Qin, Yanhui1,2; Wang, Weihua1,2; Hao, Junming1,2; Yang, Shuhua1,2; Ni, Jie1,2
刊名	JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES
	2017-11-16
卷号	122期号:21页码:11549-11567
关键词	extreme precipitation soil moisture soil temperature permafrost Tanggula Qinghai-Tibetan Plateau
ISSN号	2169-897X
DOI	10.1002/2017JD026736
通讯作者	Wu, Tonghua(thuawu@lzb.ac.cn)
英文摘要	The characteristics of long-term variation for extreme precipitation events were analyzed at the Tanggula site in the continuous permafrost regions of the Qinghai-Tibetan Plateau (QTP). In addition, the impacts of extreme precipitation events in summer on soil thermal-moisture dynamics were also investigated. The results showed that local extreme precipitation indices fluctuated significantly and that the trend magnitudes of local very wet days (R95p), annual total wet-day precipitation (PRCPTOT), number of heavy precipitation days (R10mm), maximum length of dry spell (CDD), and simple daily intensity index (SDII) were larger than those of the western QTP, other regions of China, and even the global average. The freeze-thaw cycling in the local active layer occurred from October to the next September during 2006 to 2014. The influence of extreme precipitation event in summer on local soil hydrothermal conditions could reach soil depths up to 105 cm or so, and these were more pronounced than with light or moderate precipitation events. Soil temperature reacted more promptly to local extreme precipitation events than did soil moisture. The rate at which local soil temperature fell after an extreme precipitation event was greater than the rate of increasing temperature on nonprecipitation days. Moreover, the amount of precipitation received during extreme precipitation events had a greater effect on local soil moisture and temperature than duration time for these events. Consecutive extreme precipitation events with a longer duration time did not necessarily to have a greater effect than a single precipitation event with a shorter duration. Finally, the thawing process of active layer and local water migration modes could also affect the response of soil hydrothermal conditions to an extreme precipitation event to a large extent.
收录类别	SCI
WOS关键词	BALANCE SYSTEM SEBS ; ON-SNOW EVENTS ; SURFACE-ENERGY ; SOIL-MOISTURE ; CLIMATE EXTREMES ; PREFERENTIAL FLOW ; VEGETATION COVER ; QILIAN MOUNTAINS ; WATER-CONTENT ; CENTRAL-ASIA
WOS研究方向	Meteorology & Atmospheric Sciences
WOS类目	Meteorology & Atmospheric Sciences
语种	英语
出版者	AMER GEOPHYSICAL UNION
WOS记录号	WOS:000417195500038
内容类型	期刊论文
URI标识	http://www.corc.org.cn/handle/1471x/2558047
专题	寒区旱区环境与工程研究所
通讯作者	Wu, Tonghua
作者单位	1.Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, State Key Lab Cryospher Sci, Cryosphere Res Stn Qinghai Tibet Plateau, Lanzhou, Gansu, Peoples R China 2.Univ Chinese Acad Sci, Coll Resources & Environm, Beijing, Peoples R China
推荐引用方式 GB/T 7714	Zhu, Xiaofan,Wu, Tonghua,Li, Ren,et al. Impacts of Summer Extreme Precipitation Events on the Hydrothermal Dynamics of the Active Layer in the Tanggula Permafrost Region on the Qinghai-Tibetan Plateau[J]. JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,2017,122(21):11549-11567.
APA	Zhu, Xiaofan.,Wu, Tonghua.,Li, Ren.,Xie, Changwei.,Hu, Guojie.,...&Yang, Cheng.(2017).Impacts of Summer Extreme Precipitation Events on the Hydrothermal Dynamics of the Active Layer in the Tanggula Permafrost Region on the Qinghai-Tibetan Plateau.JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,122(21),11549-11567.
MLA	Zhu, Xiaofan,et al."Impacts of Summer Extreme Precipitation Events on the Hydrothermal Dynamics of the Active Layer in the Tanggula Permafrost Region on the Qinghai-Tibetan Plateau".JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES 122.21(2017):11549-11567.

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