DOI: 10.1007/s00382-016-3007-9
Scopus记录号: 2-s2.0-84957600287
论文题名: Mechanisms for stronger warming over drier ecoregions observed since 1979
作者: Zhou L. ; Chen H. ; Hua W. ; Dai Y. ; Wei N.
刊名: Climate Dynamics
ISSN: 9307575
出版年: 2016
卷: 47, 期: 2017-09-10 起始页码: 2955
结束页码: 2974
语种: 英语
英文关键词: Global warming
; Greenhouse gases
; Radiative forcing
; Water vapor feedback
英文摘要: Previous research found that the warming rate observed for the period 1979–2012 increases dramatically with decreasing vegetation greenness over land between 50°S and 50°N, with the strongest warming rate seen over the driest regions such as the Sahara desert and the Arabian Peninsula, suggesting warming amplification over deserts. To further this finding, this paper explores possible mechanisms for this amplification by analyzing observations, reanalysis data and historical simulations of global coupled atmosphere–ocean general circulation models. We examine various variables, related to surface radiative forcing, land surface properties, and surface energy and radiation budget, that control the warming patterns in terms of large-scale ecoregions. Our results indicate that desert amplification is likely attributable primarily to enhanced longwave radiative forcing associated with a stronger water vapor feedback over drier ecoregions in response to the positive global-scale greenhouse gas forcing. This warming amplification and associated downward longwave radiation at the surface are reproduced by historical simulations with anthropogenic and natural forcings, but are absent if only natural forcings are considered, pointing to new potential fingerprints of anthropogenic warming. These results suggest a fundamental pattern of global warming over land that depend on the dryness of ecosystems in mid- and low- latitudes, likely reflecting primarily the first order large-scale thermodynamic component of global warming linked to changes in the water and energy cycles over different ecosystems. This finding may have important implications in interpreting global warming patterns and assessing climate change impacts. © 2016, Springer-Verlag Berlin Heidelberg. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/53492
Appears in Collections: 过去全球变化的重建
There are no files associated with this item.
作者单位: Department of Atmospheric and Environmental Sciences, University at Albany, State University of New York (SUNY), 1400 Washington Avenue, Albany, NY, United States; Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters/Key Laboratory of Meteorological Disaster, Ministry of Education, Nanjing University of Information Science and Technology, Nanjing, China; College of Atmospheric Sciences, Nanjing University of Information Science and Technology, Nanjing, China; College of Global Change and Earth System Science, Beijing Normal University, Beijing, China
Recommended Citation:
Zhou L.,Chen H.,Hua W.,et al. Mechanisms for stronger warming over drier ecoregions observed since 1979[J]. Climate Dynamics,2016-01-01,47(2017-09-10)