An improved mellor-yamada level-3 model: Its numerical stability and application to a regional prediction of advection fog
An improved mellor-yamada level-3 model: Its numerical stability and application to a regional prediction of advection fog
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DOI：
10.1007/s10546-005-9030-8
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发表时间：
2006-05-01
影响因子：
4.3
通讯作者：
Niino, Hiroshi
中科院分区：
文献类型：
--
作者：
Nakanishi, Mikio;Niino, Hiroshi
本文描述了Nakanishi和Niino提出的改进的Mellor-Yamada（M-Y）Level-3模型的数值稳定版本[Nakanishi，M. Niino，H.：2004年，边界层陨石。112，1-31]，并演示了其应用于平流雾的区域预报。为了保证改进的M-Y Level-3模式的可实现性和数值稳定性，对稳定性函数的计算、温度和含水量方差及其协方差（L/q，L为主尺度，q（2）/2为单位质量湍流动能）进行了限制。具有这些限制的模型预测的平均量，如温度的垂直廓线是在良好的协议与大涡模拟的辐射雾。在区域预报中，它还合理地再现了卫星观测的平流雾的水平分布。
This note describes a numerically stable version of the improved Mellor-Yamada (M-Y) Level-3 model proposed by Nakanishi and Niino [Nakanishi, M. and Niino, H.: 2004, Boundary-Layer Meteorol. 112, 1-31] and demonstrates its application to a regional prediction of advection fog. In order to ensure the realizability for the improved M-Y Level-3 model and its numerical stability, restrictions are imposed on computing stability functions, on L/q, the temperature and water-content variances, and their covariance, where L is the master length scale and q(2)/2 the turbulent kinetic energy per unit mass. The model with these restrictions predicts vertical profiles of mean quantities such as temperature that are in good agreement with those obtained from large-eddy simulation of a radiation fog. In a regional prediction, it also reasonably reproduces the satellite-observed horizontal distribution of an advection fog.