DOI: 10.1002/2013JD020312
论文题名: Dynamical response of the Arctic atmospheric boundary layer process to uncertainties in sea-ice concentration
作者: Seo H. ; Yang J.
刊名: Journal of Geophysical Research Atmospheres
ISSN: 21698996
出版年: 2013
卷: 118, 期: 22 起始页码: 12383
结束页码: 12402
语种: 英语
英文关键词: Arctic sea ice
; atmospheric modeling
; boundary layer process
; sea-ice concentration
Scopus关键词: Atmospheric boundary layer
; Digital storage
; Sea ice
; Sea level
; Uncertainty analysis
; Weather forecasting
; Arctic sea ice
; Atmospheric model
; Boundary layer process
; Near-surface winds
; Sea ice concentration
; Stability adjustment
; Station based datum
; Weather research and forecasting
; Meteorology
; atmospheric modeling
; boundary layer
; data set
; geostrophic flow
; ice thickness
; ice-ocean interaction
; marine atmosphere
; sea ice
; sea level pressure
; spatial analysis
; surface wind
; uncertainty analysis
; weather forecasting
; wind stress
; Arctic Ocean
英文摘要: Impact of sea-ice concentration (SIC) on the Arctic atmospheric boundary layer (ABL) is investigated using a polar-optimized version of the Weather Research and Forecasting (Polar WRF) model forced with SIC conditions during three different years. We present a detailed comparison of the simulations with historical ship and ice station based data focusing on September. Our analysis shows that Polar WRF provides a reasonable representation of the observed ABL evolution provided that SIC uncertainties are small. Lower skill is obtained, however, with elevated SIC uncertainties associated with incorrect seasonal evolution of sea ice and misrepresentation of ice thickness near the marginal ice zone (MIZ). The result underscores the importance of accurate representation of ice conditions for skillful simulation of the Arctic ABL. Further, two dynamically distinctive effects of sea ice on the surface wind were found, which act on different spatial scales. Reduced SIC lowers ABL stability, thereby increasing surface-wind (W10) speeds. The spatial scale of this response is comparable to the basin scale of the SIC difference. In contrast, near-surface geostrophic wind (Wg) shows a strong response in the MIZ, where a good spatial correspondence exists among the Laplacian of the sea level pressure (SLP), the surface-wind convergence, and the vertical motion within the ABL. This indicates that SIC affects Wg through variation in SLP but on a much narrower scale. Larger-amplitude and broader-scale response in W10 implies that surface-wind stress derived from Wg to drive ice-ocean models may not fully reflect the effect of SIC changes. Key Points Polar WRF represents well the Arctic atmospheric boundary layer process Near-surface wind is affected by sea ice via stability adjustment Response in near-surface geostrophic wind is evident across the sea-ice margins ©2013. 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/63141
Appears in Collections: 影响、适应和脆弱性 气候减缓与适应
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作者单位: Physical Oceanography Department, Woods Hole Oceanographic Institution, MS No 21, 266 Woods Hole Road, Woods Hole, MA 02543, United States
Recommended Citation:
Seo H.,Yang J.. Dynamical response of the Arctic atmospheric boundary layer process to uncertainties in sea-ice concentration[J]. Journal of Geophysical Research Atmospheres,2013-01-01,118(22)