DOI: 10.1175/JCLI-D-11-00710.1
Scopus记录号: 2-s2.0-84875825638
论文题名: Impact of daily arctic sea ice variability in CAM3.0 during fall and winter
作者: Dammann D.O. ; Bhatt U.S. ; Langen P.L. ; Krieger J.R. ; Zhang X.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2013
卷: 26, 期: 6 起始页码: 1939
结束页码: 1955
语种: 英语
Scopus关键词: Atmospheric response
; Climate projection
; Community atmosphere model
; Coupled Model Intercomparison Project
; Daily fluctuations
; High temporal frequency
; Sea ice concentration
; Sea level pressure
; Computer simulation
; Sea ice
; Sea level
; Waterway transportation
; Ice control
; atmospheric modeling
; concentration (composition)
; ice movement
; sea ice
; sea level pressure
; storm
; winter
; Arctic Ocean
; North America
; Northern Europe
英文摘要: Climate projections suggest that an ice-free summer Arctic Ocean is possible within several decades and with this comes the prospect of increased ship traffic and safety concerns. The daily sea ice concentration tendency in five Coupled Model Intercomparison Project phase 5 (CMIP5) simulations is compared with observations to reveal that many models underestimate this quantity that describes high-frequency ice movements, particularly in the marginal ice zone. To investigate whether high-frequency ice variability impacts the atmosphere, the Community Atmosphere Model, version 3.0 (CAM3.0), is forced by sea ice with and without daily fluctuations. Two 100-member ensemble experiments with daily varying (DAILY) and smoothly varying (SMTH) sea ice are conducted, along with a climatological control, for an anomalously low ice period (August 2006-November 2007). Results are presented for three periods: September 2006, October 2006, and December-February (DJF) 2006/07. The atmospheric response differs between DAILY and SMTH. In September, sea ice differences lead to an anomalous high and weaker storm activity over northern Europe. During October, the ice expands equatorward faster in DAILY than SMTH in the Siberian seas and leads to a local response of near-surface cooling. In DJF, there is a 1.5-hPa positive sea level pressure anomaly over North America, leading to anomalous northerly flow and anomalously cool continental U.S. temperatures. While the atmospheric responses are modest, the differences arising from high temporal frequency ice variability cannot be ignored. Increasing the accuracy of coupledmodel sea ice variations on short time scales is needed to improve short-term coupled model forecasts. © 2013 American Meteorological Society. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/51956
Appears in Collections: 气候变化事实与影响
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作者单位: Department of Atmospheric Sciences, College of Natural Sciences and Mathematics, Arctic Region Supercomputing Center University of Alaska Fairbanks, Fairbank, AK, United States; Department of Atmospheric Sciences, College of Natural Sciences and Mathematics and Geophysical, Institute University of Alaska Fairbanks, Fairbanks, AK, United States; Danish Climate Centre, Danish Meteorological Institute, Copenhagen, Denmark; Arctic Region Supercomputing Center, University of Alaska Fairbanks, Fairbanks, AK, United States; International Arctic Research Center, University of Alaska Fairbanks, Fairbanks, AK, United States
Recommended Citation:
Dammann D.O.,Bhatt U.S.,Langen P.L.,et al. Impact of daily arctic sea ice variability in CAM3.0 during fall and winter[J]. Journal of Climate,2013-01-01,26(6)