DOI: 10.1002/2013JD020204
论文题名: A modified moist potential vorticity, its properties, and application
作者: Peng J. ; Zhang L. ; Zhang Y. ; Zhu J.
刊名: Journal of Geophysical Research Atmospheres
ISSN: 21698996
出版年: 2013
卷: 118, 期: 23 起始页码: 12999
结束页码: 13007
语种: 英语
英文关键词: mesoscale numerical models
; moist potential vorticity
; moist species gradients
; nonconservative processes
; PV anomaly
; tendency equation
Scopus关键词: Numerical models
; Research
; Water vapor
; Weather forecasting
; Mesoscale numerical model
; moist species gradients
; Nonconservative
; Potential vorticity
; PV anomaly
; tendency equation
; Vorticity
; climate modeling
; heating
; hydrometeorology
; mesoscale meteorology
; numerical model
; potential vorticity
; precipitation (climatology)
; water vapor
英文摘要: A modified moist potential vorticity (MMPV) and its tendency equation are derived in terms of modified potential temperature and the specific volume of dry air. MMPV holds not only the simplicity of virtual potential vorticity but also the conservation, impermeability, and invertibility principles of potential vorticity under certain conditions. More importantly, the effects of various nonconservative processes are explicitly included in its tendency equation. It can be seen from the MMPV tendency equation that contributions of moist species (water vapor and hydrometeors) to moist potential vorticity anomalies are twofolds: (i) the latent heating and the mass forcing of water vapor associated with moist microphysical processes and (ii) the solenoidal terms associated with the nonuniform distribution of moist species. Thus, we believe that it will be convenient to use MMPV in investigating the impact of diabatic processes and moist species gradients on the evolution of weather systems. A case study indicates that the MMPV does show strong signals aligned with the horizontal distribution of precipitation, suggesting its potential use as an accurate diagnostic variable. Since the MMPV tendency equation is derived from fully compressible and nonhydrostatic moist atmosphere system, the MMPV will also be a valid tool for evaluating and improving mesoscale numerical models such as the Advanced Research Weather Research and Forecasting model. Key Points A modified moist potential vorticity and its tendency equation are derived The effects of various nonconservative processes are explicitly considered MMPV shows strong signals aligned with the distribution of precipitation ©2013. American Geophysical Union. All Rights Reserved. 资助项目: 41375063
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/63131
Appears in Collections: 影响、适应和脆弱性 气候减缓与适应
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作者单位: College of Meteorology and Oceanography, PLA University of Science and Technology, Zhong Hua Men Wai, Nanjing 211101, China
Recommended Citation:
Peng J.,Zhang L.,Zhang Y.,et al. A modified moist potential vorticity, its properties, and application[J]. Journal of Geophysical Research Atmospheres,2013-01-01,118(23)