气候变化领域集成服务门户(CCPortal): Spatial-temporal trends of hydrological transitions in thermokarst lakes on Northeast Qinghai-Tibet Plateau based on stable isotopes

CCPortal

DOI	10.1016/j.jhydrol.2021.126314
	Spatial-temporal trends of hydrological transitions in thermokarst lakes on Northeast Qinghai-Tibet Plateau based on stable isotopes
	Yang, Yuzhong; Wu, Qingbai; Liu, Fengjing; Jin, Huijun
发表日期	2021
ISSN	0022-1694
EISSN	1879-2707
卷号	597
英文摘要	Regarded as the water towers of numerous large rivers in Asia, the Source Area of Yellow River (SAYR) on Northeast Qinghai-Tibet Plateau (QTP) contains substantial thermokarst lakes, which have exerted significant roles on the regional hydrology and water resources under permafrost degradation. To address the potential impact of climate- and permafrost-induced changes in surface hydrological processes in the SAYR, the hydrological transitions and water balance of thermokarst lakes were characterized on large scales during three years using stable isotope method. Spatial and seasonal deviations in hydrological processes of thermokarst lakes were remarkable. Calculations of evaporation-to-inflow (E/I) ratios based on an isotope-mass balance model revealed substantial evaporation for all thermokarst lakes during June due to the control of climate conditions and limited input water. Substantial feeds from summer/fall rain and permafrost meltwater resulted in lower evaporation and positive water balance of lakes during July, August, September, and October. Based on the relationship between lake-specific input water isotope compositions (delta(I)) and annual average isotope value of precipitation (delta(P)), the recharge patterns of thermokarst lakes in the SAYR were classified: supra-permafrost water/rainfall-dominated lakes were mainly concentrated during June and October regardless of spatial divergences, and summer precipitation/permafrost thaw-dominated lakes are popular during July and August. Qualitatively, seasonal diversities in the water balance of thermokarst lakes are combinatively controlled by air temperature, precipitation regimes, permafrost degradation in the SAYR. Lastly, the future hydrological trajectories of thermokarst lakes are expected under climatic warming and permafrost degradation. This study serves as an important contribution for understanding future hydrological changes and allocation of water resources on the QTP, as well as an indication of permafrost degradation under climate warming.
英文关键词	Thermokarst lakes; Source Area of Yellow River (SAYR); Stable isotopes; Ground ice; Permafrost degradation; Water balance
语种	英语
WOS研究方向	Engineering ; Geology ; Water Resources
WOS类目	Engineering, Civil ; Geosciences, Multidisciplinary ; Water Resources
WOS关键词	ACTIVE-LAYER HYDROLOGY ; BAYAN HAR MOUNTAINS ; OLD CROW FLATS ; WATER-BALANCE ; YELLOW-RIVER ; THERMAL REGIME ; MASS-BALANCE ; SOURCE AREA ; DISCONTINUOUS PERMAFROST ; ARCTIC LAKES
WOS记录号	WOS:000652835600100
来源期刊	JOURNAL OF HYDROLOGY
来源机构	中国科学院西北生态环境资源研究院
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/240239
作者单位	[Yang, Yuzhong; Wu, Qingbai; Jin, Huijun] Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, State Key Lab Frozen Soil Engn, Lanzhou 730000, Peoples R China; [Yang, Yuzhong; Liu, Fengjing] Michigan Technol Univ, Sch Forest Resources & Environm Sci, Houghton, MI USA; [Yang, Yuzhong; Wu, Qingbai] Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, Beiluhe Observat Stn Frozen Soil Environm & Engn, Lanzhou, Peoples R China
推荐引用方式 GB/T 7714	Yang, Yuzhong,Wu, Qingbai,Liu, Fengjing,et al. Spatial-temporal trends of hydrological transitions in thermokarst lakes on Northeast Qinghai-Tibet Plateau based on stable isotopes[J]. 中国科学院西北生态环境资源研究院,2021,597.
APA	Yang, Yuzhong,Wu, Qingbai,Liu, Fengjing,&Jin, Huijun.(2021).Spatial-temporal trends of hydrological transitions in thermokarst lakes on Northeast Qinghai-Tibet Plateau based on stable isotopes.JOURNAL OF HYDROLOGY,597.
MLA	Yang, Yuzhong,et al."Spatial-temporal trends of hydrological transitions in thermokarst lakes on Northeast Qinghai-Tibet Plateau based on stable isotopes".JOURNAL OF HYDROLOGY 597(2021).