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DOI	10.1016/j.gloplacha.2021.103651
	On the importance of subsurface heat flux for estimating the mass balance of alpine glaciers
	Yang, Min; Li, Zhongqin; Anjum, Muhammad Naveed; Zhang, Xin; Gao, Yayu; Xu, Chunhai
通讯作者	Li, ZQ (通讯作者)，Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, State Key Lab Cryospher Sci, Lanzhou 730000, Peoples R China.
发表日期	2021
ISSN	0921-8181
EISSN	1872-6364
卷号	207
英文摘要	Glaciers, as massive freshwater reservoirs, support the planet's living systems and have an impact on our daily lives, even for communities living far away. Ongoing and future climate change is predicted to have strong impacts on the mass balance of alpine glacier around the world. To understand the relationship between climate and glacier dynamics, a range of mass balance models are currently used. Most of these models however, ignore subsurface heat fluxes as a component of glacier mass balance. Here, we set out to investigate the importance of subsurface heat flux for the mass balance of an alpine glacier using a surface energy mass balance model (SEM) coupled with a multilayer subsurface heat conduction model (MSHCM) that resolves the subsurface glacier temperature. As a case study, we investigate the Urumqi Glacier No.1 in the Tianshan Mountains (NW China), which has a long and continuous time series of surface and subsurface glacier temperature measurements. We evaluate the results of both glacier temperature models (SEM and MSHCM) using these in situ observations and investigate the sensitivity of mass balance to five meteorological factors: air temperature, precipitation, incoming shortwave radiation, relative humidity, and wind speed. The mass balance of the glacier was simulated first by including the influence of subsurface heat flux, and second, the subsurface heat flux was neglected. Observed and simulated mass balance and the englacial temperature were found to be reasonably close in both cases. Furthermore, the mass balance was simulated with a zero surface temperature assumption, which resulted in a 6% overestimation of the summer ablation. We concluded that the mass balance of Urumqi Glacier No.1 was most sensitive to variations in temperature, followed by precipitation. Furthermore, our results show that subsurface heat flux in the ablation area can generally be neglected in estimating the mass balance of alpine glaciers during ablation season.
关键词	SURFACE-ENERGY BALANCE GREENLAND ICE-SHEET QILIAN MOUNTAINS TIEN-SHAN NO. 1 SENSITIVITY CLIMATE TEMPERATURE VARIABILITY MODEL
英文关键词	Surface energy mass balance; Englacier temperature; Sensitivity analysis; Random forest
语种	英语
WOS研究方向	Physical Geography ; Geology
WOS类目	Geography, Physical ; Geosciences, Multidisciplinary
WOS记录号	WOS:000709727100001
来源期刊	GLOBAL AND PLANETARY CHANGE
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/254344
作者单位	[Yang, Min; Li, Zhongqin; Anjum, Muhammad Naveed; Zhang, Xin; Gao, Yayu; Xu, Chunhai] Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, State Key Lab Cryospher Sci, Lanzhou 730000, Peoples R China; [Yang, Min; Anjum, Muhammad Naveed; Zhang, Xin; Gao, Yayu; Xu, Chunhai] Univ Chinese Acad Sci, Beijing 100049, Peoples R China; [Anjum, Muhammad Naveed] PMAS Arid Agr Univ, Fac Agri Engn & Technol, Rawalpindi 46000, Pakistan
推荐引用方式 GB/T 7714	Yang, Min,Li, Zhongqin,Anjum, Muhammad Naveed,et al. On the importance of subsurface heat flux for estimating the mass balance of alpine glaciers[J]. 中国科学院西北生态环境资源研究院,2021,207.
APA	Yang, Min,Li, Zhongqin,Anjum, Muhammad Naveed,Zhang, Xin,Gao, Yayu,&Xu, Chunhai.(2021).On the importance of subsurface heat flux for estimating the mass balance of alpine glaciers.GLOBAL AND PLANETARY CHANGE,207.
MLA	Yang, Min,et al."On the importance of subsurface heat flux for estimating the mass balance of alpine glaciers".GLOBAL AND PLANETARY CHANGE 207(2021).