Direct and indirect effects of solar variations on stratospheric ozone and temperature  

作　　者：SHANG Lin TIAN WenShou DHOMSE Sandip CHIPPERFIELD Martyn P LIU Yi WANG WuKe 

机构地区：[1]Key Laboratory of Semi-Arid Climate Change, Ministry of Education, College of Atmospheric Sciences, Lanzhou University [2]Institute for Climate and Atmospheric Science, School of Earth and Environment, University of Leeds LS1 3HE,UK [3]Key Laboratory of Middle Atmosphere and Global Environment Observation,Institute of Atmospheric Physics, Chinese Academy of Sciences

出　　处：《Chinese Science Bulletin》2013年第31期3840-3846,共7页

基　　金：supported by the National Basic Research Program of China(2010CB428604);the National Natural Science Foundation of China(41175042 and 41225018)

摘　　要：We have used a fully coupled chemistry-climate model(WACCM)to investigate the relative importance of the direct and indirect effects of 11a solar variations on stratospheric temperature and ozone.Although the model does not contain a quasi-biennial oscillation(QBO)and uses fixed sea surface temperature(SST),it is able to produce a second maximum solar response in tropical lower stratospheric(TLS)temperature and ozone of approximately 0.5 K and 3%,respectively.In the TLS,the solar spectral variations in the chemistry scheme play a more important role than solar spectral variations in the radiation scheme in generating temperature and ozone responses.The chemistry effect of solar variations causes significant changes in the Brewer-Dobson(BD)circulation resulting in ozone anomalies in the TLS.The model simulations also show a negative feedback in the upper stratosphere between the temperature and ozone responses.A wavelet analysis of the modeled ozone and temperature time series reveals that the maximum solar responses in ozone and temperature caused by both chemical and radiative effects occur at different altitudes in the upper stratosphere.The analysis also confirms that both the direct radiative and indirect ozone feedback effects are important in generating a solar response in the upper stratospheric temperatures,although the solar spectral variations in the chemistry scheme give the largest solar cycle power in the upper stratospheric temperature.We have used a fully coupled chemistry-climate model （WACCM） to investigate the relative importance of the direct and indirect effects of 1 la solar variations on stratospheric temperature and ozone. Although the model does not contain a quasi-biennial os- cillation （QBO） and uses fixed sea surface temperature （SST）, it is able to produce a second maximum solar response in tropical lower stratospheric （TLS） temperature and ozone of approximately 0.5 K and 3%, respectively. In the TLS, the solar spectral vari- ations in the chemistry scheme play a more important role than solar spectral variations in the radiation scheme in generating temperature and ozone responses. The chemistry effect of solar variations causes significant changes in the Brewer-Dobson （BD） circulation resulting in ozone anomalies in the TLS. The model simulations also show a negative feedback in the upper strato- sphere between the temperature and ozone responses. A wavelet analysis of the modeled ozone and temperature time series re- veals that the maximum solar responses in ozone and temperature caused by both chemical and radiative effects occur at different altitudes in the upper stratosphere. The analysis also confirms that both the direct radiative and indirect ozone feedback effects are important in generating a solar response in the upper stratospheric temperatures, although the solar spectral variations in the chemistry scheme give the largest solar cycle power in the upper stratospheric temperature.

关 键 词：温度变化 臭氧变化 下平流层 太阳能 直接和 间接 化学效应 耦合模型 

分 类 号：P421.3[天文地球—大气科学及气象学]