A Density Current Parameterization Coupled with Emanuel’s Convection Scheme. Part II: 1D Simulations
A Density Current Parameterization Coupled with Emanuel’s Convection Scheme. Part II: 1D Simulations
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DOI：
10.1175/2009jas3045.1
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发表时间：
2010-04
影响因子：
3.1
通讯作者：
J. Grandpeix;J. Lafore;F. Chéruy
中科院分区：
文献类型：
--
作者：
J. Grandpeix;J. Lafore;F. Chéruy
在本系列论文的第一部分中描述的密度流参数化与Emanuel对流方案耦合，在大陆和海洋对流系统的单列框架中进行了测试。案例定义和参考模拟由云分辨模型（crm）提供。在这两种情况下，尾流方案产生的冷池相对于环境具有温度和湿度差异，与观测值相当一致（尾流深度在陆地上约为2公里，在海洋上约为1公里）。与对流方案的耦合产生了类似于CRM模拟的对流加热、干燥和降水。因此，尾迹对对流作用的有效升力能（ALE）和有效升力（ALP）的表示似乎令人满意。对尾流对流系统对参数化基本参数的敏感性进行了广泛的研究。建议每个参数的取值范围有助于在成熟的一般循环模型中实施该方案。©2010美国气象学会。
The density current parameterization coupled with Emanuel's convection scheme, described in Part I of this series of papers, is tested in a single-column framework for continental and maritime convective systems. The case definitions and reference simulations are provided by cloud-resolving models (CRMs). For both cases, the wake scheme yields cold pools with temperature and humidity differences relative to the environment in reasonable agreement with observations (with wake depth on the order of 2 km over land and 1 km over ocean). The coupling with the convection scheme yields convective heating, drying, and precipitation similar to those simulated by the CRM. Thus, the representation of the action of the wakes on convection in terms of available lifting energy (ALE) and available lifting power (ALP) appears satisfactory. The sensitivity of the wake-convection system to the basic parameters of the parameterization is widely explored. A range of values for each parameter is recommended to help with implementing the scheme in a full-fledged general circulation model. © 2010 American Meteorological Society.