DOI: 10.1016/j.atmosres.2018.07.007
Scopus记录号: 2-s2.0-85049984955
论文题名: Relative roles of dry intrusion, latent heat and instabilities in the Mei-yu rainband life cycle: A case study
作者: Luo X. ; Fei J. ; Huang X. ; Ding J. ; Ma Z.
刊名: Atmospheric Research
ISSN: 1698095
出版年: 2018
卷: 214 起始页码: 10
结束页码: 20
语种: 英语
英文关键词: Dry intrusion
; Instabilities
; Latent heat feedback
; Organized moist convection
; Rainband
Scopus关键词: Latent heat
; Life cycle
; Stability
; Weather forecasting
; Dry intrusions
; Heat feedback
; Inertial instability
; Mesoscale circulation
; Moist convection
; Potential vorticity
; Rainband
; Weather research and forecasting
; Heat convection
; atmospheric convection
; atmospheric moisture
; computer simulation
; frontogenesis
; instability
; latent heat flux
; mesoscale meteorology
; numerical model
; precipitation (climatology)
; rainband
; Citrus maxima
英文摘要: Simulations using a convection-permitting numerical model (The Weather Research and Forecasting, WRF) are conducted to investigate the mechanisms responsible for the maintenance and organization of long-lived moist convection into a Mei-yu rainband (091800–101,800 UTC June 2008). This rainband was composed of multiple two-dimensional precipitation bandings, being elongated from the southwest to the northeast with the narrow width. In addition to establishment of the Mei-yu frontal zone, the northwesterly flow behind the mid-tropospheric trough also brought about upper-level dry air. The downward transport of the dry air had a high value of potential vorticity and just overrode the low-level moist southwesterly component, inducing the conditional instability (CI) and frontogenesis at the coherent regions. This behavior combined with the Mei-yu frontogenesis, leading to successive convection to maintain the rainband, whereas the latent heat was not directly linked to the rainband longevity. The releases of CI, conditionally symmetric and inertial instabilities were simultaneously present in the bandings, as an indication of the mechanisms for the formation of banded structures. Therefore, the mesoscale circulations in banded convection developed in the form of coexisted upward and slantwise motions. Our attempt to integrate the dry intrusion and multiple instabilities could be a vital significance in discussing the Mei-yu rainband development. © 2018 Elsevier B.V. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/108761
Appears in Collections: 影响、适应和脆弱性 气候变化事实与影响
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作者单位: College of Meteorology and Oceanography, National University of Defense Technology, Nanjing, 211101, China
Recommended Citation:
Luo X.,Fei J.,Huang X.,et al. Relative roles of dry intrusion, latent heat and instabilities in the Mei-yu rainband life cycle: A case study[J]. Atmospheric Research,2018-01-01,214