DOI: 10.1175/JCLI-D-11-00528.1
Scopus记录号: 2-s2.0-84871723868
论文题名: Influence of the madden-julian oscillation and intraseasonal waves on surface wind and convection of the tropical Atlantic ocean
作者: Yu W. ; Han W. ; Gochis D.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2012
卷: 25, 期: 23 起始页码: 8057
结束页码: 8074
语种: 英语
Scopus关键词: Atmospheric intraseasonal variability
; Central Atlantic
; Convection amplitude
; Convective events
; Eastern equatorial Atlantic
; Intraseasonal variability
; Madden-Julian oscillation
; Outgoing longwave radiation
; Reanalysis
; Rossby wave
; Satellite winds
; Seasonality
; Strong convections
; Surface winds
; Tropical atlantic
; West African Monsoon
; Western Atlantic
; Atmospheric thermodynamics
; Climate change
; Information dissemination
; Ocean habitats
; Ocean currents
; atmospheric convection
; longwave radiation
; Madden-Julian oscillation
; monsoon
; Rossby wave
; seasonal variation
; surface wind
; Atlantic Ocean
; Atlantic Ocean (Tropical)
英文摘要: Atmospheric intraseasonal variability in the tropical Atlantic is analyzed using satellite winds, outgoing longwave radiation (OLR), and reanalysis products during 2000-08. The analyses focus on assessing the effects of dominant intraseasonal atmospheric convective processes, theMadden-Julian oscillation (MJO), and Rossby waves on surface wind and convection of the tropical Atlantic Ocean and African monsoon area. The results show that contribution from each process varies in different regions. In general, the MJO events dominate the westward-propagating Rossby waves in affecting strong convection in the African monsoon region. The Rossby waves, however, have larger contributions to convection in the western Atlantic Ocean. Both the westward- and eastward-propagating signals contribute approximately equally in the central Atlantic basin. The effects of intraseasonal signals have evident seasonality. Both convection amplitude and the number of strong convective events associated with the MJO are larger during November-April than duringMay-October in all regions. Convection associated with Rossby wave events is stronger during November-April for all regions, and the numbers of Rossby wave events are higher during November-April than during May-October in the African monsoon region, and are comparable for the two seasons in the western and central Atlantic basins. Of particular interest is that the MJOs originating from the Indo-Pacific Ocean can be enhanced over the tropical Atlantic Ocean while they propagate eastward, amplifying their impacts on theAfrican monsoon. On the other hand, Rossby waves can originate either in the eastern equatorial Atlantic or West African monsoon region, and some can strengthen while they propagate westward, affecting surface winds and convection in the western Atlantic and Central American regions. © 2012 American Meteorological Society. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/52130
Appears in Collections: 气候变化事实与影响
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作者单位: Research Applications Laboratory, National Center for Atmospheric Research, Boulder, CO, United States; Department of Atmospheric and Oceanic Sciences, University of Colorado, Boulder, CO, United States; Research Applications Laboratory, National Center for Atmospheric Research, Boulder, CO, United States
Recommended Citation:
Yu W.,Han W.,Gochis D.. Influence of the madden-julian oscillation and intraseasonal waves on surface wind and convection of the tropical Atlantic ocean[J]. Journal of Climate,2012-01-01,25(23)