DOI: 10.1175/JCLI-D-15-0849.1
Scopus记录号: 2-s2.0-85008177150
论文题名: Time-dependent variations in the arctic's surface albedo feedback and the link to seasonality in sea ice
作者: Andry O. ; Bintanja R. ; Hazeleger W.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2017
卷: 30, 期: 1 起始页码: 393
结束页码: 410
语种: 英语
Scopus关键词: Climate change
; Climate models
; Feedback
; Global warming
; Sea ice
; Solar radiation
; Arctic
; Climate sensitivity
; Coupled models
; Radiative surfaces
; Sea ice retreats
; Temporal variation
; Time dependent variations
; Time-varying effects
; Ice
英文摘要: The Arctic is warming 2 to 3 times faster than the global average. Arctic sea ice cover is very sensitive to this warming and has reached historic minima in late summer in recent years (e.g., 2007 and 2012). Considering that the Arctic Ocean is mainly ice covered and that the albedo of sea ice is very high compared to that of open water, any change in sea ice cover will have a strong impact on the climate response through the radiative surface albedo feedback. Since sea ice area is projected to shrink considerably, this feedback will likely vary considerably in time. Feedbacks are usually evaluated as being constant in time, even though feedbacks and climate sensitivity depend on the climate state. Here the authors assess and quantify these temporal changes in the strength of the surface albedo feedback in response to global warming. Analyses unequivocally demonstrate that the strength of the surface albedo feedback exhibits considerable temporal variations. Specifically, the strength of the surface albedo feedback in the Arctic, evaluated for simulations of the future climate (CMIP5 RCP8.5) using a kernel method, shows a distinct peak around the year 2100. This maximum is found to be linked to increased seasonality in sea ice cover when sea ice recedes, in which sea ice retreat during spring turns out to be the dominant factor affecting the strength of the annual surface albedo feedback in the Arctic. Hence, changes in sea ice seasonality and the associated fluctuations in surface albedo feedback strength will exert a time-varying effect on Arctic amplification during the projected warming over the next century. © 2017 American Meteorological Society. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/49728
Appears in Collections: 气候变化事实与影响
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作者单位: Royal Netherlands Meteorological Institute (KNMI), De Bilt, Netherlands; Meteorology and Air Quality, Department of Environmental Sciences, Wageningen University, Wageningen, Netherlands; Netherlands eScience Center, Amsterdam, Netherlands
Recommended Citation:
Andry O.,Bintanja R.,Hazeleger W.. Time-dependent variations in the arctic's surface albedo feedback and the link to seasonality in sea ice[J]. Journal of Climate,2017-01-01,30(1)