气候变化领域集成服务门户(CCPortal): Distributed summer air temperatures across mountain glaciers in the south-east Tibetan Plateau: Temperature sensitivity and comparison with existing glacier datasets

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DOI	10.5194/tc-15-595-2021
	Distributed summer air temperatures across mountain glaciers in the south-east Tibetan Plateau: Temperature sensitivity and comparison with existing glacier datasets
	Shaw T.E.; Yang W.; Ayala A.; Bravo C.; Zhao C.; Pellicciotti F.
发表日期	2021
ISSN	19940416
起始页码	595
结束页码	614
卷号	15 期号:2
英文摘要	Near-surface air temperature (Ta) is highly important for modelling glacier ablation, though its spatiotemporal variability over melting glaciers still remains largely unknown. We present a new dataset of distributed Ta for three glaciers of different size in the south-east Tibetan Plateau during two monsoon-dominated summer seasons. We compare on-glacier Ta to ambient Ta extrapolated from several local off-glacier stations. We parameterise the along-flowline sensitivity of Ta on these glaciers to changes in off-glacier temperatures (referred to as "temperature sensitivity") and present the results in the context of available distributed on-glacier datasets around the world. Temperature sensitivity decreases rapidly up to 2000 3000 m along the down-glacier flowline distance. Beyond this distance, both the Ta on the Tibetan glaciers and global glacier datasets show little additional cooling relative to the off-glacier temperature. In general, Ta on small glaciers (with flowline distances < 1000 m) is highly sensitive to temperature changes outside the glacier boundary layer. The climatology of a given region can influence the general magnitude of this temperature sensitivity, though no strong relationships are found between along-flowline temperature sensitivity and mean summer temperatures or precipitation. The terminus of some glaciers is affected by other warm-air processes that increase temperature sensitivity (such as divergent boundary layer flow, warm up-valley winds or debris/valley heating effects) which are evident only beyond ∼ 70 % of the total glacier flowline distance. Our results therefore suggest a strong role of local effects in modulating temperature sensitivity close to the glacier terminus, although further work is still required to explain the variability of these effects for different glaciers. © 2021 Author(s).
英文关键词	air temperature; comparative study; data set; glacier dynamics; mountain environment; sensitivity analysis; summer; temperature effect; China; Qinghai-Xizang Plateau
语种	英语
来源期刊	Cryosphere
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/202426
作者单位	Federal Institute for Forest, Snow and Landscape Research (WSL), Birmensdorf, Switzerland; Key Laboratory of Tibetan Environment Changes and Land Surface Processes, Institute of Tibetan Plateau Research, Chinese Academy of Sciences (CAS), Beijing, China; CAS Center for Excellence in Tibetan Plateau Earth Sciences, Beijing, 100101, China; Centre for Advanced Studies in Arid Zones (CEAZA), La Serena, Chile; School of Geography, University of Leeds, Leeds, United Kingdom; Department of Geography, Northumbria University, Newcastle, United Kingdom
推荐引用方式 GB/T 7714	Shaw T.E.,Yang W.,Ayala A.,et al. Distributed summer air temperatures across mountain glaciers in the south-east Tibetan Plateau: Temperature sensitivity and comparison with existing glacier datasets[J],2021,15(2).
APA	Shaw T.E.,Yang W.,Ayala A.,Bravo C.,Zhao C.,&Pellicciotti F..(2021).Distributed summer air temperatures across mountain glaciers in the south-east Tibetan Plateau: Temperature sensitivity and comparison with existing glacier datasets.Cryosphere,15(2).
MLA	Shaw T.E.,et al."Distributed summer air temperatures across mountain glaciers in the south-east Tibetan Plateau: Temperature sensitivity and comparison with existing glacier datasets".Cryosphere 15.2(2021).