Convective parameterization for mesoscale models : The Kain-Fritsch Scheme
Convective parameterization for mesoscale models : The Kain-Fritsch Scheme
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DOI：
10.1007/978-1-935704-13-3_16
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发表时间：
1993
期刊：
影响因子：
--
通讯作者：
J. Kain;J. Fritsch
中科院分区：
文献类型：
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作者：
J. Kain;J. Fritsch
Kain-Fritsch（KF）对流参数化方案（CPS）基于与Fritsch-Chappell（FC）（1980）方案相同的基本闭合假设-对流效应被假设为在平流时间段内去除网格元素中的对流可用位能。它的发展是由正在进行的中尺度对流系统的观测和数值研究，揭示了某些物理过程的潜在重大影响，没有在FC方案的动机。例如，在FC方案中，从对流云到它们的环境的疏散发生在靠近云顶的有限垂直深度上。然而，从诊断研究（例如，Leary and Houze 1980; Gamache and Houze 1983）认为，深对流云中物质和水汽的中层辐散对某些中尺度对流系统的发展起着重要作用。
The Kain-Fritsch (KF) convective parameterization scheme (CPS) is based on the same fundamental closure assumption as the Fritsch-Chappell (FC) (1980) scheme—convective effects are assumed to remove convective available potential energy in a grid element within an advective time period. Its development was motivated by ongoing observational and numerical investigations of mesoscale convective systems that have revealed the potentially significant impact of certain physical processes that were not represented in the FC scheme. For example, in the FC scheme, detrainment from convective clouds to their environment occurs over a limited vertical depth near cloud top. Yet, it has become evident from diagnostic studies (e.g., Leary and Houze 1980; Gamache and Houze 1983) that midlevel detrainment of mass and moisture from deep convective clouds plays an important role in the development of some mesoscale convective systems.