globalchange  > 气候减缓与适应
DOI: 10.1002/2017JD027846
Scopus记录号: 2-s2.0-85040746621
论文题名:
Spring Snow-Albedo Feedback Analysis Over the Third Pole: Results From Satellite Observation and CMIP5 Model Simulations
作者: Guo H.; Wang X.; Wang T.; Ma Y.; Ryder J.; Zhang T.; Liu D.; Ding J.; Li Y.; Piao S.
刊名: Journal of Geophysical Research: Atmospheres
ISSN: 2169897X
出版年: 2018
卷: 123, 期:2
起始页码: 750
结束页码: 763
语种: 英语
英文关键词: CMIP5 ; future climate change ; Karakoram ; satellite observations ; spring snow-albedo feedback ; Third Pole
Scopus关键词: albedo ; climate change ; climate modeling ; CMIP ; feedback mechanism ; future prospect ; satellite data ; snow ; snow cover ; temperature ; China ; Karakoram ; Qinghai-Xizang Plateau
英文摘要: The snow-albedo feedback is a crucial component in high-altitude cryospheric change but is poorly quantified over the Third Pole, encompassing the Karakoram and Tibetan Plateau. Here we present an analysis of present-day and future spring snow-albedo feedback over the Third Pole, using a 28 year satellite-based albedo and the latest climate model simulations. We show that present-day spring snow-albedo feedback strength is primarily determined by the decrease in albedo due to snow metamorphosis, rather than that due to reduced snow cover in the Karakoram, but not found in Southeastern Tibet. We further demonstrate an emergent relationship between snow-albedo feedback from the seasonal cycle and that from climate change across models. Combined with contemporary satellite-based snow-albedo feedback from seasonal cycle, this relationship enables us to estimate that the feedback strength for the Karakoram with a relatively high glaciated area is −2.42 ± 0.48% K−1 under an unmitigated scenario, which is much stronger than that for Southeastern Tibet (−1.64 ± 0.48% K−1) and for the Third Pole (−0.89 ± 0.44% K−1), respectively. Moreover, it is noteworthy that the magnitude of the constrained strength is only half of the unconstrained model estimate for the Third Pole, suggesting that current climate models generally overestimate the feedback of spring snow change to temperature change based on the unmitigated scenario. ©2018. American Geophysical Union. All Rights Reserved.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/114663
Appears in Collections:气候减缓与适应

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作者单位: Key Laboratory of Alpine Ecology and Biodiversity, Institute of Tibetan Plateau Research, Chinese Academy of Sciences, Beijing, China; University of Chinese Academy of Sciences, Beijing, China; CAS Center for Excellence in Tibetan Plateau Earth Sciences, Chinese Academy of Sciences, Beijing, China; Key Laboratory of Tibetan Environment Changes and Land Surface Processes, Institute of Tibetan Plateau Research, Chinese Academy of Sciences, Beijing, China; Laboratoire des Sciences du Climat et de l'Environnement (LSCE/IPSL), CEA-CNRS-UVSQ, Université Paris-Saclay, Gif-sur-Yvette, France; Sino-French Institute for Earth System Science, College of Urban and Environmental Sciences, Peking University, Beijing, China

Recommended Citation:
Guo H.,Wang X.,Wang T.,et al. Spring Snow-Albedo Feedback Analysis Over the Third Pole: Results From Satellite Observation and CMIP5 Model Simulations[J]. Journal of Geophysical Research: Atmospheres,2018-01-01,123(2)
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