气候变化领域集成服务门户(CCPortal): Air Temperature Variability in High-Elevation Glacierized Regions: Observations from Six Catchments on the Tibetan Plateau

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DOI	10.1175/JAMC-D-21-0122.1
	Air Temperature Variability in High-Elevation Glacierized Regions: Observations from Six Catchments on the Tibetan Plateau
	Yang, Wei; Zhu, Meilin; Guo, Xiaofeng; Zhao, Huabiao
通讯作者	Yang, W ; Zhao, HB (通讯作者)
发表日期	2022
ISSN	1558-8424
EISSN	1558-8432
起始页码	223
结束页码	238
卷号	61 期号:3
英文摘要	Near-surface air temperature variability and the reliability of temperature extrapolation within glacierized regions are important issues for hydrological and glaciological studies that remain elusive because of the scarcity of high-elevation observations. Based on air temperature data in 2019 collected from 12 automatic weather stations, 43 temperature loggers, and 6 national meteorological stations in 6 different catchments, this study presents air temperature variability in different glacierized and nonglacierized regions and assesses the robustness of different temperature extrapolations to reduce errors in melt estimation. The results show high spatial variability in temperature lapse rates (LRs) in different climatic contexts, with the steepest LRs located on the cold and dry northwestern Tibetan Plateau and the lowest LRs located on the warm and humid monsoonal-influenced southeastern Tibetan Plateau. Near-surface air temperatures in high-elevation glacierized regions of the western and central Tibetan Plateau are less influenced by katabatic winds and thus can be linearly extrapolated from off-glacier records. In contrast, the local katabatic winds prevailing on the temperate glaciers of the southeastern Tibetan Plateau exert pronounced cooling effects on the ambient air temperature, and thus, on-glacier air temperatures are significantly lower than that in elevation-equivalent nonglacierized regions. Consequently, linear temperature extrapolation from low-elevation nonglacierized stations may lead to as much as 40% overestimation of positive degree-days, particularly with respect to large glaciers with a long-flowline distances and significant cooling effects. These findings provide noteworthy evidence that the different LRs and relevant cooling effects on high-elevation glaciers under distinct climatic regimes should be carefully accounted for when estimating glacier melting on the Tibetan Plateau.
关键词	MASS-BALANCE LAPSE RATES MOUNTAIN GLACIERS SOUTHERN SLOPES SENSITIVITY PRECIPITATION HIMALAYAN IMPACT ENERGY MODEL
英文关键词	Glaciers; Hydrology; Temperature; Mountain meteorology
语种	英语
WOS研究方向	Meteorology & Atmospheric Sciences
WOS类目	Meteorology & Atmospheric Sciences
WOS记录号	WOS:000778938100002
来源期刊	JOURNAL OF APPLIED METEOROLOGY AND CLIMATOLOGY
来源机构	中国科学院青藏高原研究所
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/260582
推荐引用方式 GB/T 7714	Yang, Wei,Zhu, Meilin,Guo, Xiaofeng,et al. Air Temperature Variability in High-Elevation Glacierized Regions: Observations from Six Catchments on the Tibetan Plateau[J]. 中国科学院青藏高原研究所,2022,61(3).
APA	Yang, Wei,Zhu, Meilin,Guo, Xiaofeng,&Zhao, Huabiao.(2022).Air Temperature Variability in High-Elevation Glacierized Regions: Observations from Six Catchments on the Tibetan Plateau.JOURNAL OF APPLIED METEOROLOGY AND CLIMATOLOGY,61(3).
MLA	Yang, Wei,et al."Air Temperature Variability in High-Elevation Glacierized Regions: Observations from Six Catchments on the Tibetan Plateau".JOURNAL OF APPLIED METEOROLOGY AND CLIMATOLOGY 61.3(2022).