DOI: 10.1175/JCLI-D-17-0476.1
Scopus记录号: 2-s2.0-85048505589
论文题名: Effect of Madden-Julian oscillation occurrence frequency on the interannual variability of Northern Hemisphere stratospheric wave activity in winter
作者: Wang F. ; Tian W. ; Xie F. ; Zhang J. ; Han Y.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2018
卷: 31, 期: 13 起始页码: 5031
结束页码: 5049
语种: 英语
英文关键词: Madden-Julian oscillation
; Rossby waves
; Stratospheric circulation
; Wave breaking
Scopus关键词: Climate change
; Mechanical waves
; Interannual variability
; Madden-Julian oscillation
; Northern Hemispheres
; Numerical experiments
; Occurrence frequencies
; Rossby wave
; Stratospheric circulations
; Wavebreaking
; Upper atmosphere
; annual variation
; atmospheric wave
; Madden-Julian oscillation
; Northern Hemisphere
; Rossby wave
; spatial distribution
; stratosphere
; wave breaking
; winter
英文摘要: This study uses reanalysis datasets and numerical experiments to investigate the influence of the occurrence frequency of the individual phases of the Madden-Julian oscillation (MJO) on the interannual variability of stratospheric wave activity in the middle and high latitudes of the Northern Hemisphere during boreal winter [November-February (NDJF)]. Our analysis reveals that the occurrence frequency of MJO phase 4 in winter is significantly positively correlated with the interannual variability of the Eliassen-Palm (E-P) flux divergence anomalies in the northern extratropical stratosphere; that is, higher (lower) occurrence frequency of MJO phase 4 corresponds to weaker (stronger) upward wave fluxes and increased (decreased) E-P flux divergence anomalies in the middle and upper stratosphere at mid-to-high latitudes, which implies depressed (enhanced) wave activity accompanied by a stronger (weaker) polar vortex in that region. The convection anomalies over the Maritime Continent related to MJO phase 4 excite a Rossby wave train that propagates poleward to middle and high latitudes, and is in antiphase with the climatological stationary waves of wavenumber 1 at middle and high latitudes. As the spatial distribution of the convection anomalies during MJO phase 7 has an almost opposite, but weaker, pattern to that during MJO phase 4, the occurrence frequency of MJO phase 7 has an opposite and weaker effect on the northern extratropical stratosphere to MJO phase 4. However, the other MJO phases (1, 2, 3, 5, 6, and 8) cannot significantly influence the northern extratropical stratosphere because the wave responses in these phases are neither totally in nor out of phase with the background stationary wavenumber 1. © 2018 American Meteorological Society. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/111495
Appears in Collections: 气候减缓与适应
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作者单位: Key Laboratory for Semi-Arid Climate Change of the Ministry of Education, College of Atmospheric Science, Lanzhou University, Lanzhou, China; College of Global Change and Earth System Science, Beijing Normal University, Beijing, China
Recommended Citation:
Wang F.,Tian W.,Xie F.,et al. Effect of Madden-Julian oscillation occurrence frequency on the interannual variability of Northern Hemisphere stratospheric wave activity in winter[J]. Journal of Climate,2018-01-01,31(13)