DOI: 10.1175/JCLI-D-15-0551.1
Scopus记录号: 2-s2.0-84966444592
论文题名: Macrophysical, microphysical, and radiative properties of tropical mesoscale convective systems over their life cycle
作者: Bouniol D. ; Roca R. ; Fiolleau T. ; Poan D.E.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2016
卷: 29, 期: 9 起始页码: 3353
结束页码: 3371
语种: 英语
Scopus关键词: Atmospheric radiation
; Clouds
; Geostationary satellites
; Heat radiation
; Heating
; Orbits
; Tracking (position)
; Cloud radiative effects
; Convective-scale process
; Diabatic heating
; Meso-scale systems
; Radiative fluxes
; Radiative forcings
; Storms
; climatology
; cloud radiative forcing
; convective system
; diabatic process
; hydrometeorology
; mesoscale meteorology
; radiative forcing
; Atlantic Ocean
; Indian Ocean
; West Africa
英文摘要: Mesoscale convective systems (MCSs) are important drivers of the atmospheric large-scale circulation through their associated diabatic heating profile. Taking advantage of recent tracking techniques, this study investigates the evolution of macrophysical, microphysical, and radiative properties over the MCS life cycle by merging geostationary and polar-orbiting satellite data. These observations are performed in three major convective areas: Continental West Africa, the adjacent Atlantic Ocean, and the open Indian Ocean. MCS properties are also investigated according to internal subregions (convective, stratiform, and nonprecipitating anvil). Continental MCSs show a specific life cycle, with more intense convection at the beginning. Larger and denser hydrometeors are thus found at higher altitudes, as well as up to the cirriform subregion. Oceanic MCSs have more constant reflectivity values, suggesting a less intense convective updraft, but more persistent intensity. A layer of small crystals is found in all subregions, but with a depth that varies according to the MCS subregion and life cycle. Radiative properties are also examined. It appears that the evolution of large and dense hydrometeors tends to control the evolution of the cloud albedo and the outgoing longwave radiation. The impact of dense hydrometeors, detrained from the convective towers, is also seen in the radiative heating profiles, in particular in the shortwave domain. A dipole of cooling near the cloud top and heating near the cloud base is found in the longwave; this cooling intensifies near the end of the life cycle. © 2016 American Meteorological Society.
Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/49950
Appears in Collections: 气候变化事实与影响
There are no files associated with this item.
作者单位: CNRM/GAME, Météo-France/CNRS, Toulouse, France; LEGOS, CNRS, Toulouse, France
Recommended Citation:
Bouniol D.,Roca R.,Fiolleau T.,et al. Macrophysical, microphysical, and radiative properties of tropical mesoscale convective systems over their life cycle[J]. Journal of Climate,2016-01-01,29(9)