DOI: 10.1175/2011JCLI4124.1
Scopus记录号: 2-s2.0-84863039550
论文题名: Influence of sea surface temperature on humidity and temperature in the outflow of tropical deep convection
作者: Luo Z.J. ; Kley D. ; Johnson R.H. ; Liu G.Y. ; Nawrath S. ; Smit H.G.J.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2012
卷: 25, 期: 4 起始页码: 1340
结束页码: 1348
语种: 英语
Scopus关键词: Air properties
; Bimodal distribution
; Convective systems
; Deep convection
; Flight levels
; In-situ measurement
; Measurement of ozone and water vapor by airbus in-service aircrafts
; Model simulation
; Satellite data
; Sea surface temperatures
; Specific humidity
; Temperature increase
; Unimodal
; Vertical motions
; Atmospheric humidity
; Atmospheric temperature
; Heat convection
; Natural convection
; Ozone
; Temperature
; Tropics
; Computer simulation
; air-sea interaction
; convection
; in situ measurement
; MOZAIC program
; outflow
; relative humidity
; sea surface temperature
; troposphere
英文摘要: Multiple years of measurements of tropical upper-tropospheric temperature and humidity by the Measurement of Ozone and Water Vapor by Airbus In-Service Aircraft (MOZAIC) project are analyzed in the vicinity of deep convective outflow to study the variations of temperature and humidity and to investigate the influence of the sea surface temperature (SST) on the outflow air properties. The principal findings are the following. 1) The distribution of relative humidity with respect to ice (RH i) depends on where a convective system is sampled by the MOZAIC aircraft: deep inside the system, RHi is unimodal with the mode at ~114%; near the outskirts of the system, bimodal distribution of RH i starts to emerge with a dry mode at around 40% and a moist mode at 100%. The results are compared with previous studies using in situ measurements and model simulations. It is suggested that the difference in the RH i distribution can be explained by the variation of vertical motions associated with a convective system. 2) Analysis of MOZAIC data shows that a fractional increase of specific humidity with SST, q -1 dq/dSTT, near the convective outflow is about 0.16-0.18 K -1. These values agree well with previous studies using satellite data. Because MOZAIC measurements of temperature and humidity are independent, the authors further analyze the SST dependence ofRH i and temperature individually. Temperature increases with SST for both prevalent flight levels (238 and 262 hPa); RH i stays close to constant with respect to SST for 238 hPa but shows an increasing trend for the 262-hPa level. Analysis conducted in this study represents a unique observational basis against which model simulations of upper-tropospheric humidity and its connection to deep convection and SST can be evaluated. © 2012 American Meteorological Society. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/52566
Appears in Collections: 气候变化事实与影响
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作者单位: Department of Earth and Atmospheric Sciences, NOAA/CREST Center, City College of New York, CUNY, New York, NY, United States; Department of Atmospheric Science, Colorado State University, Fort Collins, CO, United States; Klimahaus Betriebsgesellschaft mbH, Bremerhaven, Germany; Troposphäre, Institut für Energie- und Klimaforschung, Forschungszentrum Jülich, Jülich, Germany
Recommended Citation:
Luo Z.J.,Kley D.,Johnson R.H.,et al. Influence of sea surface temperature on humidity and temperature in the outflow of tropical deep convection[J]. Journal of Climate,2012-01-01,25(4)