摘要
辐射—云—对流相互作用的正确和合理描述是改进湿物理过程描述和数值模式的重要方面。在一个物理守恒律保真的全球模式中引入描述更细致的云参数化方案和辐射参数化方案,对6个30天实时资料数值积分进行分析。结果表明,通过云参数化方案中云描述的细化,改进了模式对云分布、云量、以及云水、云冰不同相态的模拟;辐射方案中对这些云水物质的反应,有效改进了次网格加热中的辐射对流平衡,进而促进了次网格加热和动力相互作用的改进,斜压能量转换获得改进。最终,模式在整体系统误差上取得较大改进,对流层顶的温度场和风场误差明显减小,降水结构和降水强度显著改进,并且未见"双赤道辐合带"的现象。
One of the most important aspects in improving the numerical model is the reasonable description of radiation-cloud-convection interaction.A more detailed cloud parameterization and radiation parameterization were introduced in a physical conservation fidelity global spectral model,and analysis was based on six 30-day numerical integrations of real-time data.Results show that the simulation of cloud and diabatic heating rate between radiation and convection are improved.Furthermore,the baroclinic energy conversions are improved.As a result,the systematic errors have considerable improvements.Temperature error throughout the tropopause and wind error are decreased.Precipitation is dramatically improved both in the amount and the structure.Another advantage is that the false structure of ＂double Intertropical Convergence Zone（ITCZ）＂is not seen in the result.
出处
《气候与环境研究》
CSCD
北大核心
2011年第4期407-418,共12页
Climatic and Environmental Research
基金
国家自然科学基金项目40775067
40475026
关键词
物理守恒律保真
谱模式
辐射—云—对流平衡
能量循环
系统误差
fidelity of physical conservation laws
spectral model
energy cycle
systematic error
radiation-cloud-convection interaction
