【摘要】 利用臭氧和温度探空廓线,结合NCEP/NCAR资料、TOMS臭氧总量卫星观测资料和NOAAHYSPLIT后向轨迹模式资料,通过个例分析探讨了影响青藏高原(下称高原)附近臭氧垂直分布的因子和过程。结果表明,动力过程是影响高原上空臭氧垂直分布的主要因子,特别是中高纬度高臭氧浓度的空气向南入侵会导致高原上空臭氧浓度的升高,影响高原上空臭氧低谷的范围大小和形态;尽管大气化学过程对高原上空的平流层下层臭氧垂直分布的影响并不显著,但是高原上空的平流层臭氧变化与温度变化具有较好的一致性。同时还发现,对流层上层的强反气旋系统,特别是中高纬度阻塞高压的边缘有明显的平流层空气向对流层入侵,从而导致对流层内臭氧浓度的增加。更多还原

【Abstract】 Using the ozone and temperature sounding data,NCEP/NCAR data,total ozone column of TOMS satellite observations and back trajectories calculated from NOAA HYSPLIT model,the factors and processes affecting vertical profiles of ozone near the Tibetan Plateau through a case study were investigated.The analysis shows that the dynamic transport is the main factor which influences on the vertical distribution of ozone over the Tibetan Plateau.The invasion of air from the high latitude to the south will lead to the increase of ozone concentration over the Tibetan Plateau and affect the range and shape of ozone valley’ over the Tibetan plateau.Although the impact of chemical processes on ozone concentration over the Tibetan Plateau is not significant in the lower stratosphere,but the analysis indicates that the ozone changes are in good accordance with ozone changes in the stratosphere.The analysis also reveals that downward invasion of the stratospheric air into the troposphere is likely to occur near the edge of high pressure systems,particularly for those strong quasi-stationary anti-cyclone systems at middle and high latitudes.This invasion of stratospheric air will cause the increase of the ozone concentration in the troposphere.更多还原