Tripleclouds: An Efficient Method for Representing Horizontal Cloud Inhomogeneity in 1D Radiation Schemes by Using Three Regions at Each Height
Tripleclouds: An Efficient Method for Representing Horizontal Cloud Inhomogeneity in 1D Radiation Schemes by Using Three Regions at Each Height
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DOI：
10.1175/2007jcli1940.1
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发表时间：
2008-06
影响因子：
4.9
通讯作者：
J. Shonk;R. Hogan
中科院分区：
文献类型：
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作者：
J. Shonk;R. Hogan
摘要目前大气环流模式中的辐射方案在考虑云的情况下做了许多简化，其中最重要的是去除水平不均匀性。一个新的计划，试图占被忽视的不均匀性，通过使用两个区域的云在每个垂直水平的模式，而不是一个。其中一个区域用于表示水平中光学较薄的云，另一个区域表示光学较厚的云。因此，沿着晴空区域，该方案在每个模型级别中有三个区域，称为“三重云”。此外，该计划有能力代表任意垂直重叠的三个区域之间的相邻级别对。该方案是实现在爱德华-斯林戈辐射代码和测试250小时的数据从12个不同的日子。这些数据是来自云检索使用雷达，激光雷达，微波辐射计在奇尔博尔顿，英国南部。当...
Abstract Radiation schemes in general circulation models currently make a number of simplifications when accounting for clouds, one of the most important being the removal of horizontal inhomogeneity. A new scheme is presented that attempts to account for the neglected inhomogeneity by using two regions of cloud in each vertical level of the model as opposed to one. One of these regions is used to represent the optically thinner cloud in the level, and the other represents the optically thicker cloud. So, along with the clear-sky region, the scheme has three regions in each model level and is referred to as “Tripleclouds.” In addition, the scheme has the capability to represent arbitrary vertical overlap between the three regions in pairs of adjacent levels. This scheme is implemented in the Edwards–Slingo radiation code and tested on 250 h of data from 12 different days. The data are derived from cloud retrievals using radar, lidar, and a microwave radiometer at Chilbolton, southern United Kingdom. When ...