DOI: 10.1002/2017JD026799
Scopus记录号: 2-s2.0-85043522919
论文题名: Emergent Behavior of Arctic Precipitation in Response to Enhanced Arctic Warming
作者: Anderson B.T. ; Feldl N. ; Lintner B.R.
刊名: Journal of Geophysical Research: Atmospheres
ISSN: 2169897X
出版年: 2018
卷: 123, 期: 5 起始页码: 2704
结束页码: 2717
语种: 英语
英文关键词: Arctic
; Arctic amplification
; climate change
; polar amplification
; precipitation
英文摘要: Amplified warming of the high latitudes in response to human-induced emissions of greenhouse gases has already been observed in the historical record and is a robust feature evident across a hierarchy of model systems, including the models of the Coupled Model Intercomparison Project Phase 5 (CMIP5). The main aims of this analysis are to quantify intermodel differences in the Arctic amplification (AA) of the global warming signal in CMIP5 RCP8.5 (Representative Concentration Pathway 8.5) simulations and to diagnose these differences in the context of the energy and water cycles of the region. This diagnosis reveals an emergent behavior between the energetic and hydrometeorological responses of the Arctic to warming: in particular, enhanced AA and its associated reduction in dry static energy convergence is balanced to first order by latent heating via enhanced precipitation. This balance necessitates increasing Arctic precipitation with increasing AA while at the same time constraining the magnitude of that precipitation increase. The sensitivity of the increase, ~1.25 (W/m2)/K (~240 (km3/yr)/K), is evident across a broad range of historical and projected AA values. Accounting for the energetic constraint on Arctic precipitation, as a function of AA, in turn informs understanding of both the sign and magnitude of hydrologic cycle changes that the Arctic may experience. ©2017. American Geophysical Union. All Rights Reserved. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/114266
Appears in Collections: 气候减缓与适应
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作者单位: Department of Earth and Environment, Boston University, Boston, MA, United States; Department of Earth & Planetary Sciences, University of California, Santa Cruz, CA, United States; Department of Environmental Sciences, Rutgers, State University of New Jersey, New Brunswick, NJ, United States
Recommended Citation:
Anderson B.T.,Feldl N.,Lintner B.R.. Emergent Behavior of Arctic Precipitation in Response to Enhanced Arctic Warming[J]. Journal of Geophysical Research: Atmospheres,2018-01-01,123(5)