DOI: 10.1029/2017JD028120
Scopus记录号: 2-s2.0-85049845064
论文题名: Glacier Energy and Mass Balance in the Inland Tibetan Plateau: Seasonal and Interannual Variability in Relation to Atmospheric Changes
作者: Li S. ; Yao T. ; Yang W. ; Yu W. ; Zhu M.
刊名: Journal of Geophysical Research: Atmospheres
ISSN: 2169897X
出版年: 2018
卷: 123, 期: 12 起始页码: 6390
结束页码: 6409
语种: 英语
英文关键词: energy and mass balance
; Qiangtang No.1 Glacier
; the Indian summer monsoon
; the westerlies
Scopus关键词: ablation
; annual variation
; atmospheric dynamics
; climate conditions
; energy balance
; equilibrium line
; glacier mass balance
; monsoon
; seasonal variation
; sublimation
; surface energy
; westerly
; China
; Qiangtang Basin
; Qinghai-Xizang Plateau
; Xizang
英文摘要: The Tibetan glaciers are greatly affected by the circulations of the westerlies and the Indian summer monsoon (ISM), but the mechanisms remain to be elucidated. In this project, we investigated the surface energy and mass balance of the Qiangtang No.1 Glacier in the inland Tibetan Plateau. Combining 4-year mass balance and meteorological records near the equilibrium line altitude with an energy-based mass balance model, we found that the meteorological conditions, which determined the glacier surface ablation and mass accumulation, are critically linked to changes in the intensity of the westerlies and the ISM. The 4-year mass balance comparisons demonstrated that the enhancement of the ISM in June and July, especially June, greatly increases the mass accumulation but inhibits the glacial ablation in the melt season, shifting the mass balance in a positive direction. Moreover, the occurrence of the westerlies enhancement interrupts the dominance of the ISM in the melt season. The intensified westerlies in the early melt season (June) could not only reduce the mass accumulation but also enhance the mass loss in the following months. In addition, the enhancement of the westerlies in the main melt season (July) could also greatly influence the local meteorological conditions, with lower temperatures and humidity but higher wind speeds. Such meteorological changes significantly reduce glacial ablation because more energy is consumed by sublimation and/or evaporation, rather than surface melting. These findings will enhance our understanding of the mechanisms underlying glacier changes and their relationships with the westerlies and the ISM in the inland Tibetan Plateau. ©2018. The Authors. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/113675
Appears in Collections: 气候减缓与适应
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作者单位: 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 and Innovation in Tibetan Plateau Earth System Sciences, CAS, Beijing, China
Recommended Citation:
Li S.,Yao T.,Yang W.,et al. Glacier Energy and Mass Balance in the Inland Tibetan Plateau: Seasonal and Interannual Variability in Relation to Atmospheric Changes[J]. Journal of Geophysical Research: Atmospheres,2018-01-01,123(12)