DOI: 10.1175/JCLI-D-16-0470.1
Scopus记录号: 2-s2.0-85015838354
论文题名: Summer enhancement of Arctic sea ice volume anomalies in the September-ice zone
作者: Bushuk M. ; Msadek R. ; Winton M. ; Vecchi G.A. ; Gudgel R. ; Rosati A. ; Yang X.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2017
卷: 30, 期: 7 起始页码: 2341
结束页码: 2362
语种: 英语
Scopus关键词: Budget control
; Climate models
; Feedback
; Forecasting
; Ice control
; Sea ice
; Solar radiation
; Albedo
; Arctic
; Climate variability
; Ice thickness
; Seasonal forecasting
; Ice
; albedo
; climate variation
; forecasting method
; ice thickness
; sea ice
; seasonal variation
; summer
; Arctic Ocean
英文摘要: Because of its persistence on seasonal time scales, Arctic sea ice thickness (SIT) is a potential source of predictability for summer sea ice extent (SIE). New satellite observations of SIT represent an opportunity to harness this potential predictability via improved thickness initialization in seasonal forecast systems. In this work, the evolution of Arctic sea ice volume anomalies is studied using a 700-yr control integration and a suite of initialized ensemble forecasts from a fully coupled global climate model. This analysis is focused on the September sea ice zone, as this is the region where thickness anomalies have the potential to impact the SIE minimum. The primary finding of this paper is that, in addition to a general decay with time, sea ice volume anomalies display a summer enhancement, in which anomalies tend to grow between the months of May and July. This summer enhancement is relatively symmetric for positive and negative volume anomalies and peaks in July regardless of the initial month. Analysis of the surface energy budget reveals that the summer volume anomaly enhancement is driven by a positive feedback between the SIT state and the surface albedo. The SIT state affects surface albedo through changes in the sea ice concentration field, melt-onset date, snow coverage, and ice thickness distribution, yielding an anomaly in the total absorbed shortwave radiation between May and August, which enhances the existing SIT anomaly. This phenomenon highlights the crucial importance of accurate SIT initialization and representation of ice-albedo feedback processes in seasonal forecast systems. © 2017 American Meteorological Society. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/49793
Appears in Collections: 气候变化事实与影响
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作者单位: Atmospheric and Oceanic Sciences Program, Princeton University, Princeton, NJ, United States; CECI UMR 5318, CNRS/CERFACS, Toulouse, France; NOAA/Geophysical Fluid Dynamics Laboratory, Princeton, NJ, United States; Atmospheric and Oceanic Sciences Program, Princeton University, Princeton, NJ, United States
Recommended Citation:
Bushuk M.,Msadek R.,Winton M.,et al. Summer enhancement of Arctic sea ice volume anomalies in the September-ice zone[J]. Journal of Climate,2017-01-01,30(7)