Prescription of land-surface boundary conditions in GISS GCM 2: A simple method based on high-resolution vegetation data bases
Prescription of land-surface boundary conditions in GISS GCM 2: A simple method based on high-resolution vegetation data bases
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发表时间：
1984-06
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通讯作者：
E. Matthews;E. Matthews
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作者：
E. Matthews;E. Matthews
提出了一种改进气候模式中季节地表特征的处方和陆面过程参数化的简单方法。该方法是为戈达德空间研究所的大气环流模型II （GISS GCM II）开发的，它保持了高分辨率土地覆盖数据的空间变异性，同时将模型中处理的植被类型限制在8种。这是通过以下方式实现的：将1度x 1度分辨率的Matthews（1983）植被数据库中的大量植被类别重新定义为8种简单类型的百分比；推导出8种类型的粗糙度长度、场容、掩蔽深度和季节光谱反射率；并将这些表面特征从1度x 1度分辨率聚合到更粗的模型分辨率，例如8度纬度x 10度经度或4度纬度x 5度经度。
A simple method was developed for improved prescription of seasonal surface characteristics and parameterization of land-surface processes in climate models. This method, developed for the Goddard Institute for Space Studies General Circulation Model II (GISS GCM II), maintains the spatial variability of fine-resolution land-cover data while restricting to 8 the number of vegetation types handled in the model. This was achieved by: redefining the large number of vegetation classes in the 1 deg x 1 deg resolution Matthews (1983) vegetation data base as percentages of 8 simple types; deriving roughness length, field capacity, masking depth and seasonal, spectral reflectivity for the 8 types; and aggregating these surface features from the 1 deg x 1 deg resolution to coarser model resolutions, e.g., 8 deg latitude x 10 deg longitude or 4 deg latitude x 5 deg longitude.