A comparison of tropical precipitation simulated by the Community Climate Model with that measured by the Tropical Rainfall Measuring Mission satellite
A comparison of tropical precipitation simulated by the Community Climate Model with that measured by the Tropical Rainfall Measuring Mission satellite
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社区气候模型模拟的热带降水与热带降雨测量任务卫星测量的热带降水的比较
DOI：
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发表时间：
2004
期刊：
影响因子：
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通讯作者：
G. North
中科院分区：
文献类型：
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作者：
J. Collier;K. Bowman;G. North
这项研究评估了社区气候模式，第3版，（CCM 3）在国家大气研究中心开发的热带降水模拟。月平均降水率从集合的CCM 3模拟计算的热带降雨测量使命（TRMM）卫星的观测超过44个月的时间。在区域和分区域范围内，108 S以南的东半球大部分地区和南美洲都进行了比较。然而，在中美洲和加勒比地区、热带大西洋南部、北方印度洋以及赤道西部和热带太平洋南部的部分地区，模型-卫星差异很大。由于热带地区的降水是大气环流潜在能量的主要来源，如此大的模式-卫星差异意味着潜在能量释放量的巨大差异。差异往往是季节性依赖108 N，其中模型湿偏差发生在现实的湿季或模型生成的人工湿季。在108 N以南，模式的湿偏置全年存在或没有可识别的模式。
This study evaluates the simulation of tropical precipitation by the Community Climate Model, version 3, (CCM3) developed at the National Center for Atmospheric Research. Monthly mean precipitation rates from an ensemble of CCM3 simulations are compared to those computed from observations of the Tropical Rainfall Measuring Mission (TRMM) satellite over a 44-month period. On regional and subregional scales, the comparison fares well over much of the Eastern Hemisphere south of 108S and over South America. However, model‐ satellite differences are large in portions of Central America and the Caribbean, the southern tropical Atlantic, the northern Indian Ocean, and the western equatorial and southern tropical Pacific. Since precipitation in the Tropics is the primary source of latent energy to the general circulation, such large model‐satellite differences imply large differences in the amount of latent energy released. Differences tend to be seasonally dependent north of 108N, where model wet biases occur in realistic wet seasons or model-generated artificial wet seasons. South of 108N, the model wet biases exist throughout the year or have no recognizable pattern.