Abstract:
Ozone is the main factor that influences the temperature of stratosphere.Based on the NCEP ozone mass mixing ratio and the temperature reanalysis data during 19792008,the evolution trend for atmospheric ozone and temperature in stratosphere over East Asia and their correlation have been investigated in this paper.The results show:Both ozone and temperature in different layers have the same trend,and there exits a notable correlation between them.
In order to investigate the relationship,the singular value decomposition (SVD)method has been used to study the ozone and temperature at three layers in stratosphere,i.e.:100hPa,70hPa and 50hPa.It is found that,the variance contribution of first singular vector at each layer has exceeded 90%,which means the SVD model corresponding to the first singular vector is the dominant model,which represent the main characteristic of the interaction between the two element fields.That is,①if the ozone content in the area of Westerlies of Eurasia increases,the temperature over the East Asia major trough of the Rossby wave rises,vice versa;② if the ozone content over the tropical easterly jet region in Eurasia has a low level,the temperature above the South Sea and south of Taiwan will decrease;③meanwhile,we found that the large scale meridional cell in the middle-lower stratosphere would play some role in modulating the ozone distribution in middle-low latitude.