不同基流中繁殖模饱和特征对比分析

为了研究不同基流背景下繁殖模的饱和特征,采用增长率和图形相关系数2个指标对不同基流计算的繁殖模进行了对比分析。结果表明:经过大约3 d的繁殖,不同基流计算的繁殖模都达到了饱和,但用NCEP再分析资料计算的繁殖模比用T 106资料计算的繁殖模的饱和级别高些;相对湿度繁殖模比其它变量的繁殖模具有较低的饱和级别,且低层比高中层更容易饱和;对于饱和后同时刻的2种繁殖模,其在结构上非常相似的同时,也存在一些不同。

Comparison analysis of bred modes' saturation characteristics in different basic flow

To study the saturatio n char acter ist ics of bred modes in dif ferent basic f low s, compar at iveanaly sis w as made using tw o par ameters: g row ing rate and pat tern relat ion coeff icient . T he result show sthat after about 3 daysø breeding cycles, both kinds of bred modes computed w ith different analy sis dataare saturated. In comparison with the bred modes computed with T 106 data, tho se computed w ith NCEPreanaly sis data are of higher saturat io n level. T he relat ive humidity bred modes have low er saturat io n levelthan those of other variables and the bred modes at low er levels reach saturat io n more easily than those athig her level s. For the tw o kinds of bred mo des at the same time af ter saturation, their structures ar e ver ysimilar in spite of some dif ferences