Dynamic Effects of the South Asian High on the Ozone Valley over the Tibetan Plateau  

作　　者：郭栋 王盘兴 周秀骥 刘煜 李维亮 

机构地区：[1]Key Laboratory of Meteorological Disaster of Ministry of Education,Nanjing University of Information Science & Technology [2]Chinese Academy of Meteorological Sciences

出　　处：《Acta meteorologica Sinica》2012年第2期216-228,共13页

基　　金：Supported by the National Basic Research and Development (973) Program of China (2010CB428605);National Natural Science Foundation of China (40675076 and 41040038);Chinese Academy of Meteorological Sciences Basic Research Fund (2008Z005);the Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD)

摘　　要：In this study,the TOMS/SBUV（Total Ozone Mapping Spectrometer/Solar Backscatter Ultraviolet Radiometer） data and SAGE（Stratospheric Aerosol and Gas Experiment） II data were employed to calculate the monthly total zonal ozone deviations over the Tibetan Plateau and the 150-50-hPa zonal ozone variations.The results show that there is a significant correlation between the two,with a correlation coefficient of 0.977.From 150 to 50 hPa,the ozone valley over the Tibetan Plateau（OVTP） becomes the strongest based on the SAGE II data,and the South Asian high（SAH） is the most active according to the 40-yr reanalysis data of the European Centre for Medium-Range Weather Forecasts（ERA40）,so a correlation between the SAH and the OVTP may exist.The WACCM3（Whole Atmosphere Community Climate Model version 3） simulation results show that both SAH and OVTP could still present within 150-50 hPa with reduced strength even when the height of the Tibetan Plateau was cut down to 1500 m.It is also shown that the seasonal variation of SAH would result in a matched seasonal variation of the OVTP,which suggests a meaningful effect of SAH on the OVTP.Meanwhile,it is found that the atmospheric circulation would impose different effects on the OVTP,depending on the SAH＇s evolution stages and movement directions.At 150-50 hPa,as the SAH approaches the plateau,the SAH zonal（meridional） transport would make the OVTP deeper（shallower）,while the vertical transport of ozone produces a deeper（shallower） OVTP at the lower（higher） level;the combined dynamic effects lead to a weakened OVTP.When the SAH stabilizes over the plateau,the zonal（meridional） transport results in a shallower（deeper） OVTP while the vertical transport would create a deeper（shallower） OVTP at the middle（bottom and top） levels;the combined dynamic effects produce a deeper OVTP.As the SAH retreats from the plateau,the OVTP becomes deeper（shallower） under the zonal（meridional） effect or shallower under the vertical effeIn this study,the TOMS/SBUV（Total Ozone Mapping Spectrometer/Solar Backscatter Ultraviolet Radiometer） data and SAGE（Stratospheric Aerosol and Gas Experiment） II data were employed to calculate the monthly total zonal ozone deviations over the Tibetan Plateau and the 150-50-hPa zonal ozone variations.The results show that there is a significant correlation between the two,with a correlation coefficient of 0.977.From 150 to 50 hPa,the ozone valley over the Tibetan Plateau（OVTP） becomes the strongest based on the SAGE II data,and the South Asian high（SAH） is the most active according to the 40-yr reanalysis data of the European Centre for Medium-Range Weather Forecasts（ERA40）,so a correlation between the SAH and the OVTP may exist.The WACCM3（Whole Atmosphere Community Climate Model version 3） simulation results show that both SAH and OVTP could still present within 150-50 hPa with reduced strength even when the height of the Tibetan Plateau was cut down to 1500 m.It is also shown that the seasonal variation of SAH would result in a matched seasonal variation of the OVTP,which suggests a meaningful effect of SAH on the OVTP.Meanwhile,it is found that the atmospheric circulation would impose different effects on the OVTP,depending on the SAH＇s evolution stages and movement directions.At 150-50 hPa,as the SAH approaches the plateau,the SAH zonal（meridional） transport would make the OVTP deeper（shallower）,while the vertical transport of ozone produces a deeper（shallower） OVTP at the lower（higher） level;the combined dynamic effects lead to a weakened OVTP.When the SAH stabilizes over the plateau,the zonal（meridional） transport results in a shallower（deeper） OVTP while the vertical transport would create a deeper（shallower） OVTP at the middle（bottom and top） levels;the combined dynamic effects produce a deeper OVTP.As the SAH retreats from the plateau,the OVTP becomes deeper（shallower） under the zonal（meridional） effect or shallower under the vertical effe

关 键 词：ozone valley the Tibetan Plateau the South Asian high seasonal variation dynamic transport 

分 类 号：P421.33[天文地球—大气科学及气象学] Q254[生物学—细胞生物学]