DOI: 10.1175/JCLI-D-17-0266.1
Scopus记录号: 2-s2.0-85047073282
论文题名: Decadal relationship between the stratospheric arctic vortex and pacific decadal oscillation
作者: Hu D. ; Guan Z.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2018
卷: 31, 期: 9 起始页码: 3371
结束页码: 3386
语种: 英语
英文关键词: Atmospheric circulation
; Decadal variability
; Pacific decadal oscillation
; Planetary waves
; Stratosphere-troposphere coupling
; Stratospheric circulation
Scopus关键词: Atmospheric movements
; Fighter aircraft
; Refractive index
; Surface waters
; Time measurement
; Troposphere
; Vortex flow
; Atmospheric circulation
; Decadal variability
; Pacific decadal oscillation
; Planetary Waves
; Stratosphere-troposphere coupling
; Stratospheric circulations
; Oceanography
; atmospheric circulation
; jet stream
; Pacific Decadal Oscillation
; planetary wave
; sea surface temperature
; stratosphere-troposphere interaction
; vortex
; vorticity
; wave propagation
; Pacific Ocean
; Pacific Ocean (North)
英文摘要: Using reanalysis datasets and numerical simulations, the relationship between the stratospheric Arctic vortex (SAV) and the Pacific decadal oscillation (PDO) on decadal time scales was investigated. A significant in-phase relationship between the PDO and SAV on decadal time scales during 1950-2014 is found, that is, the North Pacific sea surface temperature (SST) cooling (warming) associated with the positive (negative) PDO phases is closely related to the strengthening (weakening) of the SAV. This decadal relationship between the North Pacific SST and SAV is different from their relationship on subdecadal time scales. Observational and modeling results both demonstrate that the decadal variation in the SAV is strongly affected by the North Pacific SSTs related to the PDO via modifying the upward propagation of planetary wavenumber-1 waves from the troposphere to the stratosphere. The decreased SSTs over the North Pacific tend to result in a deepened Aleutian low along with a strengthened jet stream over the North Pacific, which excites a weakened western Pacific pattern and a strengthened Pacific-North American pattern. These tropospheric circulation anomalies are in accordance with the decreased refractive index (RI) at middle and high latitudes in the northern stratosphere during the positive PDO phase. The increased RI at high latitudes in the upper troposphere impedes the planetary wavenumber-1 wave from propagating into the stratosphere, and in turn strengthens the SAV. The responses of the RI to the PDO are mainly contributions of the changes in the meridional gradient of the zonal-mean potential vorticity via alteration of the baroclinic term. -f2/ρ0(ρ0ūz/N2)z. © 2018 American Meteorological Society. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/111553
Appears in Collections: 气候减缓与适应
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作者单位: Key Laboratory of Meteorological Disasters, Nanjing University of Information Science, Technology, China Ministry of Education, Joint International Research Laboratory of Climate, Environment Change, Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters, Nanjing, China
Recommended Citation:
Hu D.,Guan Z.. Decadal relationship between the stratospheric arctic vortex and pacific decadal oscillation[J]. Journal of Climate,2018-01-01,31(9)