The variation characteristics of ozone in Lhasa in recent years were analyzed by using Brewer spectrometer observation data. The results showed that ozone was mainly distributed in 15-35 km in atmosphere in Lhasa; the peak value by inversion was in 21-25 km; by comparison of ozone vertical distribution in Lhasa, it can be concluded that ozone differs insignificantly in middle-to-high layers in stratosphere and the distribution is similar over 36 km. The difference can be observed from the fact that ozone concentration is higher in winter and spring compared with summer and autumn from ground to the height at 21 km. In recent 4 years, annual average of total ozone in Lhasa was of little variations and extreme values of ozone appeared in winter and spring. Monthly averages were lower in August and September, and the lower value of ozone kept longer in 2008 for 23 d.
根据Aura卫星微波临边探测（MLS）2.2,3.3版水汽和臭氧廓线,采用线性内插方法,将夏季在青藏高原（西藏的那曲和拉萨）及其周边地区（云南腾冲）通过冷冻霜点仪（CFH）和电化学反应池型（ECC）探空仪分别测得的水汽和臭氧数据插值到与卫星产品规定的气压高度进行比较分析,以检验MLS水汽和臭氧廓线产品.结果表明：MLS 2.2和3.3版水汽相对误差在100 h Pa的对流层顶附近分别为（9.8±46.0）%（n=18）,（23.0±45.8）%（n=17）;在小于并包含82.5h Pa在内的下平流层则分别为（-2.2±15.7）%（n=74）,（0.3±14.9）%（n=75）;而在对流层316-121h Pa高度则分别为（21.5±90.6）%（n=104）,（6.0±83.4）%（n=99）.相应MLS 2.2,3.3版臭氧的误差分别为：（-3.5±54.4）%（n=27）,（-8.7±41.6）%（n=38）（100 h Pa）;（-11.7±16.3）%（n=135）,（15.6±24.2）%（n=305）（下平流层）;（18.0±79.1）%（n=47）,（34.2±76.6）%（n=160）（对流层上层）.MLS水汽和臭氧的误差垂直分布在对流层上层-平流层低层振荡和离散分布明显,部分误差可能由于此高度层水汽和臭氧浓度梯度大和比较用线性插值探空数据引起.＂臭氧低谷＂期间,拉萨地区70 h Pa高度以下MLS卫星臭氧浓度误差明显增加;腾冲、那曲与拉萨三地的MLS臭氧误差的垂直分布特征较一致.卫星产品与探空测值的初步关系表明,MLS廓线的灵敏度与水汽和臭氧在大气中垂直分布有密切联系,3.3版水汽产品的灵敏度在82.5 h Pa以上高度略有提高,臭氧产品灵敏度没有明显变化.文中还讨论了导致MLS水汽和臭氧廓线产品误差的可能因素.
