DOI: 10.1002/2014GL062257
论文题名: The Walker circulation, diabatic heating, and outgoing longwave radiation
作者: Stechmann S.N. ; Ogrosky H.R.
刊名: Geophysical Research Letters
ISSN: 0094-9441
EISSN: 1944-9172
出版年: 2014
卷: 41, 期: 24 起始页码: 9097
结束页码: 9105
语种: 英语
英文关键词: cloud radiative forcing
; latent heating
; overturning circulation
; tropical climate
Scopus关键词: Atmospheric radiation
; Damping
; Satellites
; Atmospheric heating
; Cloud radiative forcing
; Data analysis techniques
; Outgoing longwave radiation
; Overturning circulation
; Satellite observations
; Tropical atmospheres
; Tropical climates
; Heating
; cloud cover
; damping
; data interpretation
; diabatic process
; latent heat flux
; longwave radiation
; new record
; satellite data
; tropical environment
; Walker circulation
英文摘要: For the tropical atmosphere on planetary scales, it is common to model the circulation using strong damping. Here with new data analysis techniques, evidence suggests that damping can actually be neglected. Specifically, near the equator, the east-west overturning circulation is in agreement with the undamped wave response to atmospheric heating. To estimate the heating, satellite observations of outgoing longwave radiation (OLR) are used. Frequently, OLR is used as a heuristic indicator of cloudiness. Here the results further suggest that OLR variations are actually proportional to diabatic heating variations, with a proportionality constant of 18 W m-2 (K d-1)-1. While the agreement holds best over long time averages of years or decades, it also holds over shorter periods of one season or 1 month. Consequently, it is suggested that the strength of the Walker circulation - and its evolution in time - could be estimated using satellite data. Key Points The Walker circulation can be modeled without dampingDiabatic heating is proportional to outgoing longwave radiation (OLR)The strength of the Walker circulation can be estimated from satellite data ©2014. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84921814876&doi=10.1002%2f2014GL062257&partnerID=40&md5=b2e257a9444a3ec078b19667246f18e8
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/6705
Appears in Collections: 气候减缓与适应
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作者单位: Department of Mathematics, University of Wisconsin-Madison, Madison, WI, United States
Recommended Citation:
Stechmann S.N.,Ogrosky H.R.. The Walker circulation, diabatic heating, and outgoing longwave radiation[J]. Geophysical Research Letters,2014-01-01,41(24).