%0 Journal Article
%T The Application of Multiple Grid Method in A Long-range Numerical Weather Prediction Model<br>多网格法在长期数值天气预报模式中的应
%A Yu Kangyuan
%A Hu Zengzhen
%A <br>余康元
%A 胡增臻
%J 大气科学
%D 1996
%I 
%X In this paper, the basic idea of Multiple Grid method (MG) and the improved nonsteady atmosphere-earth surface coupled anomaly model are introduced, then MG is used to solve the geopotential tendency equation (an ellipse equation) in the model. It is shown, through the seasonal prediction experiment of circulations in the Northern Hemisphere from June to August in years from 1982 to 1989, that the iteration precision is increased when using MG. The defects that anomaly field is too smooth and amplitude is too small are overcomed. Large-scale low-frequency signal in the model, which plays a key role in the long-range weather prediction, is solved. Comparing experiments in high and low precisions proves that MG is better than the step-by-step over relax method increasing the computing speed more than one time. MG is more efficient in high precision than in low one.
%K multiple grid method long-range numerical weather prediction model seasonal prediction step-by-step over relax method<br>多网格法
%K 长期数值天气预报模式
%K 季节预报
%K 逐步超松弛
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=E62459D214FD64A3C8082E4ED1ABABED5711027BBBDDD35B&cid=28A2F569B2458C17&jid=46874A5A102033D774D00D819E91CD68&aid=C33FBF056DEC65968C24836068B01EC5&yid=8A15F8B0AA0E5323&vid=A04140E723CB732E&iid=B31275AF3241DB2D&sid=50FF665B2730AEEC&eid=34A7AB0452E6AF23&journal_id=1006-9895&journal_name=大气科学&referenced_num=1&reference_num=6