Exploratory High-Resolution Climate Simulations using the Community Atmosphere Model (CAM)
Exploratory High-Resolution Climate Simulations using the Community Atmosphere Model (CAM)
复制标题
DOI：
10.1175/jcli-d-13-00387.1
复制
发表时间：
2014-05-01
影响因子：
4.9
通讯作者：
Truesdale, John E.
中科院分区：
文献类型：
--
作者：
Bacmeister, Julio T.;Wehner, Michael F.;Truesdale, John E.
扩展，高分辨率（0.23度纬度x 0.31度经度）模拟与社区大气模式版本4和5（CAM 4和CAM 5）进行了检查和比较，从气候模拟结果在一个更典型的分辨率为0.9度纬度x 1.25度经度。总的来说，高分辨率实验的模拟气候并不比低分辨率实验好多少。改进主要出现在地形效应可能发挥作用的地方，包括大幅改进CAM4中高分辨率的夏季印度季风模拟。显着的敏感性，分辨率被发现在模拟降水在美国东南部在冬季。模拟的季节平均降水量的某些方面在高分辨率下显着恶化。其中最突出的是在两种模式中加剧了太平洋双ITCZ偏差。然而，虽然大规模的季节性手段并没有显着更好的高分辨率，现实的热带气旋（TC）的分布。也出现了一些技巧，在复制年际变率TC统计。
Extended, high-resolution (0.23 degrees latitude x 0.31 degrees longitude) simulations with Community Atmosphere Model versions 4 and 5 (CAM4 and CAM5) are examined and compared with results from climate simulations conducted at a more typical resolution of 0.9 degrees latitude x 1.25 degrees longitude. Overall, the simulated climate of the high-resolution experiments is not dramatically better than that of their low-resolution counterparts. Improvements appear primarily where topographic effects may be playing a role, including a substantially improved summertime Indian monsoon simulation in CAM4 at high resolution. Significant sensitivity to resolution is found in simulated precipitation over the southeast United States during winter. Some aspects of the simulated seasonal mean precipitation deteriorate notably at high resolution. Prominent among these is an exacerbated Pacific double ITCZ bias in both models. Nevertheless, while large-scale seasonal means are not dramatically better at high resolution, realistic tropical cyclone (TC) distributions are obtained. Some skill in reproducing interannual variability in TC statistics also appears.