DOI: 10.1175/JCLI-D-15-0512.1
Scopus记录号: 2-s2.0-84966412926
论文题名: Seasonal and interannual variations of the energy flux equator and ITCZ. Part I: Zonally averaged ITCZ position
作者: Adam O. ; Bischoff T. ; Schneider T.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2016
卷: 29, 期: 9 起始页码: 3219
结束页码: 3230
语种: 英语
Scopus关键词: Budget control
; Climate change
; Meteorology
; Atmospheric circulation
; Climate variability
; Energy budget/balance
; Interannual variability
; Tropical variability
; Variability
; Climatology
; annual variation
; atmospheric circulation
; climatology
; energy flux
; intertropical convergence zone
; seasonal variation
; tropical meteorology
英文摘要: In the zonal mean, the ITCZ lies at the foot of the ascending branch of the tropical mean meridional circulation, close to where the near-surface meridional mass flux vanishes. The ITCZ also lies near the energy flux equator (EFE), where the column-integrated meridional energy flux vanishes. This latter observation makes it possible to relate the ITCZ position to the energy balance, specifically the atmospheric net energy input near the equator and the cross-equatorial energy flux. Here the validity of the resulting relations between the ITCZ position and energetic quantities is examined with reanalysis data for the years 1979-2014. In the reanalysis data, the EFE and ITCZ position indeed covary on time scales of seasons and longer. Consistent with theory, the ITCZ position is proportional to the cross-equatorial atmospheric energy flux and inversely proportional to atmospheric net energy input at the equator. Variations of the cross-equatorial energy flux dominate seasonal variations of the ITCZ position. By contrast, variations of the equatorial net energy input, driven by ocean energy uptake variations, dominate interannual variations of the ITCZ position (e.g., those associated with ENSO). © 2016 American Meteorological Society. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/49963
Appears in Collections: 气候变化事实与影响
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作者单位: ETH Zürich, Zurich, Switzerland; California Institute of Technology, Pasadena, CA, United States
Recommended Citation:
Adam O.,Bischoff T.,Schneider T.. Seasonal and interannual variations of the energy flux equator and ITCZ. Part I: Zonally averaged ITCZ position[J]. Journal of Climate,2016-01-01,29(9)