DOI: 10.1002/joc.5533
论文题名: Possible contribution of the inter-annual Tibetan Plateau snow cover variation to the Madden–Julian oscillation convection variability
作者: Lyu M. ; Wen M. ; Wu Z.
刊名: International Journal of Climatology
ISSN: 8998418
出版年: 2018
卷: 38, 期: 10 起始页码: 3787
结束页码: 3800
语种: 英语
英文关键词: inter-annual variability
; Madden–Julian oscillation
; South Asia High
; Tibetan Plateau snow cover anomaly
Scopus关键词: Oceanography
; Snow
; Storms
; Tropics
; Wind effects
; Interannual variability
; Interannual variation
; Intra-seasonal variabilities
; Madden-Julian oscillation
; Snow cover variations
; Snow covers
; South Asia
; Tropical Western Pacific
; Climatology
; annual variation
; anticyclone
; atmospheric convection
; climate effect
; Madden-Julian oscillation
; orographic effect
; snow cover
; timescale
; topographic effect
; China
; Indian Ocean
; Pacific Ocean
; Pacific Ocean (West)
; Qinghai-Xizang Plateau
英文摘要: The Madden–Julian oscillation (MJO) is the major mode of intra-seasonal variability in the Tropics, yet researches about factors related to this oscillation have not been well understood, particularly on an inter-annual timescale. As a crucial index of the thermal condition of the plateau, the Tibetan Plateau snow cover (TPSC) has attracted great attention with its potential climatic effects. In this paper, observational evidences present that the inter-annual variation in the wintertime TPSC can exert influence on the convection variability associated with the MJO. For the excessive TPSC winters, the MJO convection tends to be stronger in the Indian Ocean (phases 2–3), while it is more vigorous over the western Pacific (phases 6–7) during the reduced TPSC winters. Furthermore, the South Asia High (SAH) is found to be the key system in the potential physical mechanism. A reduced (excessive) TPSC can excite upper-level anomalous anticyclone (cyclone) over the Tibetan Plateau and eastern China, which is in favour of westwards extension (eastwards withdrawal) and enhancing (weakening) of the SAH over tropical oceans. Through an anomalous tropical zonal-vertical circulation, the intensified ascending (descending) motions over the tropical western Pacific may subsequently depress (enhances) the convection over the Indian Ocean. Over the Indian Ocean (phases 2–3) and the western Pacific (phases 6–7), the zonal-vertical circulation associated with the MJO is exactly superposed with the inter-annual anomalous vertical circulation linked with the TPSC, so the according changes of MJO convection are most significant in these two categorized phases. © 2018 Royal Meteorological Society Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/116828
Appears in Collections: 气候减缓与适应
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作者单位: Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters, Nanjing University of Information Science and Technology, Nanjing, China; Chinese Academy of Meteorological Sciences, Beijing, China; Institute of Atmospheric Sciences, Fudan University, Shanghai, China
Recommended Citation:
Lyu M.,Wen M.,Wu Z.. Possible contribution of the inter-annual Tibetan Plateau snow cover variation to the Madden–Julian oscillation convection variability[J]. International Journal of Climatology,2018-01-01,38(10)