DOI: 10.1175/JCLI-D-11-00465.1
Scopus记录号: 2-s2.0-84874790272
论文题名: Circulation response to eurasian versus north american anomalous snow scenarios in the northern hemisphere with an AGCM coupled to a slab ocean model
作者: Henderson G.R. ; Leathers D.J. ; Hanson B.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2013
卷: 26, 期: 5 起始页码: 1502
结束页码: 1515
语种: 英语
Scopus关键词: Arctic Oscillation
; Atmosphere-land interactions
; Atmosphere-ocean interactions
; Atmospheric circulation
; North Atlantic oscillations
; Atmospheric pressure
; Atmospheric temperature
; Climate models
; Climatology
; Experiments
; Kinetics
; Sea ice
; Snow
; atmospheric circulation
; atmospheric general circulation model
; atmospheric modeling
; eddy
; geopotential
; kinetic energy
; midlatitude environment
; Northern Hemisphere
; sea surface temperature
; snow
; Eurasia
英文摘要: The difference between snow-covered and snow-free conditions is the most climatically significant natural seasonal change the land surface can experience. Most GCM studies investigating snow-atmosphere interactions have focused on impacts of Eurasian snow anomalies caused by the magnitude of snow mass, while North American snow has been shown to have a weaker relationship with downstream climate. Experiment design of recent snow-atmosphere interactions studies has been limited to atmosphere-only models, with sea surface temperature (SST) and sea ice extent represented as boundary conditions. The authors explore the circulation response to anomalous snow scenarios, for both North America and Eurasia, using a slab ocean model. Surface response include significant SST cooling directly downstream of each individual forcing region in addition to upstream centers of remote cooling under maximum snow conditions. Atmospheric response to anomalous snow conditions is consistent through multiple levels in the lower troposphere under maximum snow conditions throughout much of the midlatitudes in both experiments during early winter. Areas of strengthened midtropospheric eddy kinetic energy correlate well with steep geopotential height gradient differences and increased zonal wind at 250 hPa over the western Pacific. Both experiments show similar atmospheric response pathways; however, circulation response to maximum Eurasian snow is focused downstream in early winter, whereas upstream response is particularly evident from the North American experiment. This paper focuses on differences as a result of Eurasian versus North American snow forcing in atmospheric circulation response using an AGCM with a slab ocean model. © 2013 American Meteorological Society. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/51977
Appears in Collections: 气候变化事实与影响
There are no files associated with this item.
作者单位: Department of Oceanography, United States Naval Academy, 572C Holloway Road, Annapolis, MD 21402, United States; University of Delaware, Newark, DE, United States
Recommended Citation:
Henderson G.R.,Leathers D.J.,Hanson B.. Circulation response to eurasian versus north american anomalous snow scenarios in the northern hemisphere with an AGCM coupled to a slab ocean model[J]. Journal of Climate,2013-01-01,26(5)