| BCC_CSM模式对热带降水年循环模态的模拟 |
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| 引用本文： | 张莉,吴统文,辛晓歌,张洁,房永杰,王在志,魏敏.BCC_CSM模式对热带降水年循环模态的模拟[J].大气科学,2013,37(5):994-1012. |
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| 作者姓名： | 张莉 吴统文 辛晓歌 张洁 房永杰 王在志 魏敏 |
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| 作者单位： | 1.国家气候中心, 北京100081 |
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| 基金项目： | 国家重大科学研究计划项目2010CB951902;公益性行业(气象)科研专项GYHY201306020、GYHY201306062;国家自然科学基金资助项目41175074、41105054;国家高技术研究发展计划项目2010AA012403 |
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| 摘 要： | 本文评估了国家气候中心发展的两个不同分辨率海—陆—气—冰多圈层耦合气候系统模式BCC_CSM1.1和BCC_CSM1.1 (m) 对热带降水两个年循环模态——揭示降水冬夏季节差异的季风模态和揭示过渡季节春季和秋季非对称特征的春秋非对称模态的模拟能力,讨论了模拟偏差产生的可能原因。分析结果表明,BCC_CSM1.1和BCC_CSM1.1 (m) 均能合理再现全球年平均降水的基本分布特征,也能较合理再现热带降水年循环模态的基本分布特征,尤其季风模态中降水与环流关于赤道反对称的特征;能够较合理再现春秋非对称模态与热带海洋表面温度(SST)年循环之间的关系。大气温度场、环流场以及热带SST的模拟偏差对降水季风模态有影响;热带SST年循环的偏差对降水春秋非对称模态的模拟偏差有贡献;模式分辨率对降水年循环模态的模拟也有一定影响。对比分析显示,大气模式和陆面模式水平分辨率提高之后模式在某些模拟性能上有所提高,这表现在:BCC_CSM1.1 (m) 模拟的1～12月降水气候态的空间变率更接近观测;热带海表温度年循环总体上更接近观测;模拟的热带降水年循环模态的部分特征更合理。但BCC_CSM1.1 (m) 的模拟结果相对观测仍存在较大偏差,有待进一步改进。
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| 关 键 词： | 降水年循环模态 气候系统模式 季风 分辨率 |
| 收稿时间： | 2012/8/11 0:00:00 |
| 修稿时间： | 2012/11/28 0:00:00 |
The Annual Modes of Tropical Precipitation Simulated by the Beijing Climate Center Climate System Model (BCC_CSM) |
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| ZHANG Li,WU Tongwen,XIN Xiaoge,ZHANG Jie,FANG Yongjie,WANG Zaizhi and WEI Min.The Annual Modes of Tropical Precipitation Simulated by the Beijing Climate Center Climate System Model (BCC_CSM)[J].Chinese Journal of Atmospheric Sciences,2013,37(5):994-1012. |
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| Authors: | ZHANG Li WU Tongwen XIN Xiaoge ZHANG Jie FANG Yongjie WANG Zaizhi and WEI Min |
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| Institution: | 1.National Climate Center, China Meteorological Administration, Beijing 1000812.National Meteorological Information Center, China Meteorological Administration, Beijing 100081 |
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| Abstract: | The performance of two multisphere coupled climate system models developed by the Beijing Climate Center (BCC_CSM) to simulate the annual modes of tropical precipitation is evaluated and possible reasons for the resulting simulation biases are discussed. The results indicate that both BCC_CSM1.1 and BCC_CSM1.1(m) can reasonably reproduce the major characteristics of the global annual mean precipitation and annual modes of tropical precipitation. The solstice modes simulated by the two models exhibit equatorial antisymmetric structure, which corresponds to observations. BCC_CSM can reasonably reproduce the relationship between the spring-fall asymmetric mode and tropical sea surface temperature (SST). The biases in air temperature, atmospheric circulation, and tropical SST contribute to the deficiency of the solstice modes. The simulation biases in the SST annual cycle contribute to the biases in the spring-fall asymmetric mode of tropical precipitation. The differences in horizontal resolution of atmospheric model and land model affect the simulation of precipitation annual modes in BCC_CSM to some extent. The comparison shows that the spatial variabilities of climatological monthly precipitation from January to December simulated by BCC_CSM1.1 (m) are closer to the observations than those by BCC_CSM1.1 and the SST annual cycles in the tropical ocean are generally more reasonable in BCC_CSM1.1 (m) owing to its finer horizontal resolution. However, obvious biases remain in BCC_CSM1.1 (m). Therefore, further work is required to improve the performance of BCC_CSM. |
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| Keywords: | Annual modes of precipitation Climate system model Monsoon Resolution |
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