摘要
初步提出了副高总能量强度和涡度强度指数,它们对江淮异常气候有更强指示作用;用小波函数等方法分析了近50a副高和华南、江淮旱涝、台风、高温演变的特征及关系,并通过模拟副高演变,认为西移台风加强副高强度并促使副高西伸,强副高有利稳定副高及促使周边低涡加强,暴雨和洪涝区域有对应正涡度则易产生暴雨和洪涝,华南正涡度在500hPa、江淮在850hPa、上一年异常台风是江淮强涝年的强信号,副高和高温干旱也有很好关系;结合实际诊断了解暴雨过程和副高北跳的总能量变化情况,得到暴雨过程和副高北跳时总能量变化方式等,这些为短期气候预测提供了依据。
Energy and strength index of subtropical high are suggested,it is a sign to climate abnormality.We give analysis of relation of small wave of subtropical high high temperature .Motion westwards of typhoon strength vorticity near subtropical high ,it result strength and drought and flood of subtropical high and let Jianghua,typhoon and it stretch westwards, with precipitation,drought and flood of Jianghua in China analysis of vorticity show that subtropical high affect precipitation,drought and flood by 500＆850 hPa vorticity.Abnormal Typhoon of last year is strong sign.h has much precipitation in middle and end region of yanzi river in less typhoon year.Subtropical high has effect with other climate.Diagnosising energy chang of subtropical high when it actually bounce northwards,we get ways of chang of energy and provide basis of forcasting of climate.
出处
《江西气象科技》
2004年第1期12-15,共4页
Jiangxi Meteorological Science & Technology
关键词
副高
气候异常
演变特征
关系
subtropical high climate ab.normality evolution relation
