气候变化领域集成服务门户(CCPortal): Long-Term Temporal Scale-Dependent Warming Effects on the Mass Balance in the Dongkemadi Glacier, Tibetan Plateau

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DOI	10.1029/2020JD033105
	Long-Term Temporal Scale-Dependent Warming Effects on the Mass Balance in the Dongkemadi Glacier, Tibetan Plateau
	Liang L.; Cuo L.; Liu Q.
发表日期	2020
ISSN	2169897X
卷号	125 期号:20
英文摘要	Understanding how climate change impacts glaciers is important in predicting their prospective response and crucial in forecasting water supplies and potential influences within surrounding lowland areas. This study evaluated annual, seasonal, and monthly warming effects on the mass balance in the Dongkemadi (DKMD) Glacier throughout 1960–2009. Results showed an increasing trend in annual, seasonal, and monthly scale air temperature variation: high during the cool season (0.0347°C a−1) and low during the warm season (0.0222°C a−1). Warming rates variability effects at all three scales were roughly the same. Seasonal and monthly warming rates produced roughly the same effect on glacier mass balance, while the annual warming rate overestimated annual mass balance by 20.0%. July produced the largest monthly warming effect overestimation at an annual warming rate (11.9 mm w.e.; 29.3%), followed by August and June. Furthermore, increases in annual melt energy (approximately 70%) throughout the study period primarily resulted from increases in net radiation and turbulent heat flux, which mainly occurred during the warm season (>96%). Proportional increases in warming-induced rainfall caused a decrease in mass balance while contributing to differing warming rate effects through reductions in mass inputs and albedo rather than through increases in rain-induced heat flux. Results confirmed the effectiveness of using seasonal scale warming rates to investigate warming effects on glacier and meltwater changes in the Dongkemadi Glacier. This study provides valuable information to accurately evaluate warming effects on energy/mass balance of glaciers worldwide. ©2020. American Geophysical Union. All Rights Reserved.
英文关键词	glacier energy balance; glacier mass balance; glacier modeling; Tibetan Plateau; timescales; warming effects
语种	英语
来源期刊	Journal of Geophysical Research: Atmospheres
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/185694
作者单位	Key Laboratory of Tibetan Environment Changes and Land Surface Processes, Institute of Tibetan Plateau Research, Chinese Academy of Sciences, Beijing, China; CAS Center for Excellence in Tibetan Plateau Earth Sciences, Chinese Academy of Sciences, Beijing, China; University of Chinese Academy of Sciences, Beijing, China; State Key Laboratory of Water Environment Simulation, School of Environment, Beijing Normal University, Beijing, China; Key Laboratory for Water and Sediment Sciences, Ministry of Education, School of Environment, Beijing Normal University, Beijing, China
推荐引用方式 GB/T 7714	Liang L.,Cuo L.,Liu Q.. Long-Term Temporal Scale-Dependent Warming Effects on the Mass Balance in the Dongkemadi Glacier, Tibetan Plateau[J],2020,125(20).
APA	Liang L.,Cuo L.,&Liu Q..(2020).Long-Term Temporal Scale-Dependent Warming Effects on the Mass Balance in the Dongkemadi Glacier, Tibetan Plateau.Journal of Geophysical Research: Atmospheres,125(20).
MLA	Liang L.,et al."Long-Term Temporal Scale-Dependent Warming Effects on the Mass Balance in the Dongkemadi Glacier, Tibetan Plateau".Journal of Geophysical Research: Atmospheres 125.20(2020).