大气环流模式中非对流云的预报方法

Remarks about the Prognostic Schemes for Non-convective Clouds in General Circulation Model

通过对大气环流模式中非对流云预报方法的物理分析表明：大气环流模式中非对流云的预报，应包括非对流云的云水（冰）微物理过程参数化、大尺度动力过程和云量三个方面。从大尺度调整法、大尺度闭合法和统计方法三个方面，讨论了已有的大气环流模式中非对流云的凝结（华）过程的参数化方案，指出了存在的问题及改进方法。对于Ｂｅｒｇｅｒｏｎ过程，指出了已有的线性化经验公式的不足，强调了采用非线性参数化公式的重要性。本文指出了直接将中尺度模式搬到大尺度模式是不合适的，有必要进一步研究。同时指出将来的大气环流模式，应考虑浅积云所产生的层积云，还分析了已有的深积云对流所产生的高空卷云的参数化公式。并从Ｌａｇｒａｎｇｅ观点、动边界观点和统计观点，提出了大气环流模式中的云量预报的一些方案，并指出了已有方案的不足。

According to physical analysis;; cloud microphysical parameterizations;; iarge-scaledynamical proeess and cloud cover should be considered on the prognostic schemes for non-convectiveclouds in GCM. Then;; it is reviewed and discussed that the condensation (deposition) process;; includingthe large-scale adjustment's method;; the large-scale closure's method and statistics;; method;; and somemodifications should be considered. For the Bergeron process;; the non-linear process should be consid-ered. For the other cloud microphysical process;; some new schemes should be adopted;; instead of usingthe meso-scale cloud model directly. On the future model;; Sc from Cu should be considered. For Cifrom Cu;; some modifications should be considered. At last;; the new cloud cover prognostic methods inGCM are suggested from Lagrange view;; free-boundary view and staticstics view on the basis ofmathamatical-physics method.