气候变化领域集成服务门户(CCPortal): The coupled moisture-heat process of permafrost around a thermokarst pond in Qinghai-Tibet Plateau under global warming

CCPortal

DOI	10.1002/2013JF002930
	The coupled moisture-heat process of permafrost around a thermokarst pond in Qinghai-Tibet Plateau under global warming
	Li, Shuangyang; Zhan, Hongbin; Lai, Yuanming; Sun, Zhizhong; Pei, Wansheng
发表日期	2014
ISSN	2169-9003
EISSN	2169-9011
起始页码	836
结束页码	853
卷号	119 期号:4
英文摘要	Due to environmental disturbances such as local human activity and global warming, melting of massive ground ice has resulted in thermokarst ponds, which are extensively distributed in the Qinghai-Tibet Plateau (QTP). Besides the global warming, the thermokarst pond, as a major heat source, speeds up the moisture change and degradation of its surrounding permafrost. To analyze the long-term coupled moisture-heat process near a representative nonpenetrative thermokarst pond in a permafrost region, abundant temperature data over multiple years at different depths and horizontal distances from the center of the thermokarst pond have been collected at a field experimental station in QTP. A numerical model is built to analyze this thermokarst pond. The temperature and moisture processes of surrounding permafrost are simulated by this model and compared with measured temperature data. Our results show that if the rate of air temperature rise is 0.048 degrees C/yr, which refers to a 2.4 degrees C temperature rise over 50years, the thawing fronts underneath the thermokarst pond move downward at a linear rate of 0.18m/yr and the permafrost beneath the pond center would disappear after the year of 2281. Beyond that time, the impact range of the pond on the natural ground increases to about 50m in horizontal direction. So a dish-shape thawing zone occurs around the thermokarst pond. Simultaneously, the moisture state is greatly changed in 2281 and becomes completely different from that in 2013. All of these would inevitably deteriorate the ecological and environmental system in QTP.
英文关键词	Thermokarst pond; Permafrost; Qinghai-Tibet Plateau (QTP); moisture-heat process; Finite element method (FEM)
语种	英语
WOS研究方向	Geology
WOS类目	Geosciences, Multidisciplinary
WOS关键词	ARCTIC COASTAL-PLAIN ; WESTERN SIBERIA ; NUMERICAL-SIMULATION ; CENTRAL YAKUTIA ; CLIMATIC-CHANGE ; THERMAL REGIME ; BEILUHE BASIN ; MASS-TRANSFER ; THAW LAKES ; CHINA
WOS记录号	WOS:000336487100009
来源期刊	JOURNAL OF GEOPHYSICAL RESEARCH-EARTH SURFACE
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/239504
作者单位	[Li, Shuangyang; Lai, Yuanming; Sun, Zhizhong; Pei, Wansheng] Chinese Acad Sci, Cold & Arid Reg Environm & Engn Res Inst, State Key Lab Frozen Soil Engn, Lanzhou, Gansu, Peoples R China; [Li, Shuangyang; Zhan, Hongbin] Texas A&M Univ, Dept Geol & Geophys, College Stn, TX USA; [Sun, Zhizhong] Chinese Acad Sci, Cold & Arid Reg Environm & Engn Res Inst, Beiluhe Observat & Res Stn Frozen Soil Engn & Env, Lanzhou, Gansu, Peoples R China
推荐引用方式 GB/T 7714	Li, Shuangyang,Zhan, Hongbin,Lai, Yuanming,et al. The coupled moisture-heat process of permafrost around a thermokarst pond in Qinghai-Tibet Plateau under global warming[J],2014,119(4).
APA	Li, Shuangyang,Zhan, Hongbin,Lai, Yuanming,Sun, Zhizhong,&Pei, Wansheng.(2014).The coupled moisture-heat process of permafrost around a thermokarst pond in Qinghai-Tibet Plateau under global warming.JOURNAL OF GEOPHYSICAL RESEARCH-EARTH SURFACE,119(4).
MLA	Li, Shuangyang,et al."The coupled moisture-heat process of permafrost around a thermokarst pond in Qinghai-Tibet Plateau under global warming".JOURNAL OF GEOPHYSICAL RESEARCH-EARTH SURFACE 119.4(2014).