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《Plateau Meteorology》 2017-03
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Impact of the ENSO Cycle on the Stratospheric Ozone Distribution over East Asia

WANG Mingsheng;GUO Shichang;Department of Atmospheric Science,Yunnan University;Climate Center of Guangdong Province;  
The Oceanic Ni o Index(ONI) of the NOAA and ozone reanalysis data of ECMWF were used in this paper,the lag correlation method was used to analysis the influence of the ENSO circulation on the distribution of the stratospheric ozone over the East Asia. According to the composite analysis of the ozone anomaly percentage of El Ni o and La Ni a,the effect of the ENSO to the ozone force was investigated and the change can be explained by the residual circulation. The results show:(1) The effect of the ENSO to the stratospheric ozone was distinct over East Asia,which was more evident at 30 hPa,and 70 hPa than others,and that the correlation coefficient reached the maximum when lag equals 8 months.(2) After the El Ni o occurred 8 months,at stratospheric30 hPa,the ozone had a decrease over the mid-latitude region and an increase over the high latitude. At70 hPa,the ozone had an increase over the mid-latitude,but a decrease over both high and low latitudes. However,the situation was contrary after La Ni a.(3) The similar change has been obtained from the SVD analysis for the SST of Ni o3. 4 and the ozone 8 month later.(4) The difference of the effect of the El Ni o and La Ni a to the ozone was significant,and the difference of the ozone content could reach 25% when the El Ni o and La Ni a had occurred 8 months later.(5) ENSO can modulat the residual circulation,then it can influence the ozone distribution.
【Fund】: 国家自然科学基金(41275072)
【CateGory Index】: P421.32;P732
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