DOI: 10.1175/JCLI-D-15-0176.1
Scopus记录号: 2-s2.0-84957824722
论文题名: Wintertime Northern Hemisphere response in the stratosphere to the Pacific decadal oscillation using the Whole Atmosphere Community Climate Model
作者: Kren A.C. ; Marsh D.R. ; Smith A.K. ; Pilewskie P.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2016
卷: 29, 期: 3 起始页码: 1031
结束页码: 1049
语种: 英语
Scopus关键词: Chemical analysis
; Financial data processing
; Greenhouse gases
; Ice control
; Nickel
; Principal component analysis
; Sea ice
; Solar energy
; Troposphere
; Upper atmosphere
; Decadal variability
; Geopotential height anomalies
; Pacific decadal oscillation
; Solar cycle
; Stratospheric sudden warmings
; Variability
; Whole atmosphere community climate models
; Zonal-mean zonal winds
; Climate models
; air-sea interaction
; climate modeling
; El Nino-Southern Oscillation
; Northern Hemisphere
; Pacific Decadal Oscillation
; solar cycle
; stratosphere
; winter
; North America
; Pacific Ocean
英文摘要: The response of the Northern Hemisphere winter stratosphere to the Pacific decadal oscillation (PDO) is examined using the Whole Atmosphere Community Climate Model. A 200-yr preindustrial control simulation that includes fully interactive chemistry, ocean and sea ice, constant solar forcing, and greenhouse gases fixed to 1850 levels is analyzed. Based on principal component analysis, the PDO spatial pattern, frequency, and amplitude agree well with the observed PDO over the period 1900-2014. Consistent with previous studies, the positive phase of the PDO is marked by a strengthened Aleutian low and a wave train of geopotential height anomalies reminiscent of the Pacific-North American pattern in the troposphere. In addition to a tropospheric signal, a zonal-mean warming of about 2K in the northern polar stratosphere and a zonalmean zonal wind decrease of about 4ms -1 in the PDO positive phase are found. When compositing PDO positive or negative winters during neutral El Niño years, the magnitude is reduced and depicts an early winter forcing of the stratosphere compared to a late winter response from El Niño. Contamination between PDO and ENSOsignals is also discussed. Stratospheric sudden warmings occur 63% of the time in thePDOpositive phase compared to 40% in the negative phase. Although this sudden warming frequency is not statistically significant, it is quantitatively consistent with NCEP-NCAR reanalysis data and recent observational evidence linking the PDO positive phase to weak stratospheric vortex events. © 2016 American Meteorological Society. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/50116
Appears in Collections: 气候变化事实与影响
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作者单位: Department of Atmospheric and Oceanic Sciences, Laboratory for Atmospheric and Space Physics, University of Colorado, Boulder, Boulder, CO, United States; National Center for Atmospheric Research, Boulder, CO, United States
Recommended Citation:
Kren A.C.,Marsh D.R.,Smith A.K.,et al. Wintertime Northern Hemisphere response in the stratosphere to the Pacific decadal oscillation using the Whole Atmosphere Community Climate Model[J]. Journal of Climate,2016-01-01,29(3)