DOI: 10.1175/JCLI-D-19-0410.1
论文题名: Atmospheric radiative processes accelerate ground surface warming over the southeastern tibetan plateau during 1998-2013
作者: Ji P. ; Yuan X. ; Li D.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2020
卷: 33, 期: 5 语种: 英语
Scopus关键词: Earth atmosphere
; Global warming
; Asian summer monsoons
; Earth system model
; Ground surface temperature
; Ground surfaces
; Long-wave radiation
; Radiative process
; Tibetan Plateau
; Upper troposphere
; Climate models
; albedo
; cloud cover
; global climate
; global warming
; longwave radiation
; monsoon
; radiative forcing
; regional climate
; China
; Qinghai-Xizang Plateau
英文摘要: The Tibetan Plateau (TP), known as the world's "Third Pole," plays a vital role in regulating the regional and global climate and provides freshwater for about 1.5 billion people. Observations show an accelerated ground surface warming trend over the southeastern TP during the global warming slowdown period of 1998-2013, especially in the summer and winter seasons. The processes responsible for such acceleration are under debate as contributions from different radiative processes are still unknown. Here we estimate for the first time the contributions of each radiative component to the ground surface warming trend before and after 1998 by analyzing multisource datasets under an energy balance framework. Results show that declining cloud cover caused by the weakening of both the South Asian summer monsoon and local-scale atmospheric upward motion mainly led to the accelerated ground surface warming during the summers of 1998-2013, whereas the decreased surface albedo caused by the snow melting was the major warming factor in winter. Moreover, increased clear-sky longwave radiation induced by the warming middle and upper troposphere was the second largest factor, contributing to about 21%-48% of the ground surface warming trend in both the summer and winter seasons. Our results unravel the key processes driving the ground surface warming over the southeastern TP and have implications for the development of climate and Earth system models in simulating ground surface temperature change and other related complex cryosphere-hydrosphere-atmosphere interactions over high-altitude land areas. © 2020 American Meteorological Society. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/158935
Appears in Collections: 气候变化与战略
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作者单位: Key Laboratory of Regional Climate-Environment for Temperate East Asia, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing, China; College of Earth and Planetary Sciences, University of Chinese Academy of Sciences, Beijing, China; School of Hydrology and Water Resources, Nanjing University of Information Science and Technology, Nanjing, China; Department of Earth and Environment, Boston University, Boston, MA, United States
Recommended Citation:
Ji P.,Yuan X.,Li D.. Atmospheric radiative processes accelerate ground surface warming over the southeastern tibetan plateau during 1998-2013[J]. Journal of Climate,2020-01-01,33(5)