青藏高原上空氮氧化物的分布特征及其与臭氧的关系

NO_X Distribution over the Qinghai-Xizang Plateau and Its Relationship with O_3

利用1992-2002年的HALOE资料,选取青藏高原地区(28°～40°N,75°～105°E)的数据,分析了青藏高原地区NOX混合比的垂直分布特征,并对高原地区不同高度上NOX混合比与同纬度及同经度地区进行了比较,分析了NOX混合比与臭氧混合比纬向分布的关系,以及NOX混合比随时间的变化和O3混合比变化的关系.结果表明:青藏高原地区在300～30 hPa上夏季NOX的混合比高于冬季的混合比;夏季青藏高原地区200～30 hPa气层上NOX的混合比比同纬度其它地区高得多,100～60 hPa气层上NO2混合比比同经度其它地区也高得多;在100～30 hPa上,O3的纬向分布与NO-X的纬向分布之间存在较明显的反相关关系;高原地区100 hPa附近和70～35 hPa之间夏季NOX混合比的变化与O3混合比的变化的反相关关系非常好.

Using the HALOE data （from 1992 to 2002）, the features of the vertical distribution of nitrogen-oxide over the Qinghai-Xizang Plateau in summer and winter have been discussed, the mixing ratio of NOx in different altitudes over the Qinghai-Xizang Plateau is compared with that of the same latitudes and longitudes, then the relationship of the zonal distribution of NOx with O3 and the correlation between the time series of the mixing-ratio of NOx and O3 have been analyzed. The followed conclusions are made. From 300 to 30 hPa the mixing ratios of NOx over the Qinghai-Xizang Plateau in summer is higher than that of in winter; The mixing ratio of NO2 over the Qinghai-Xizang Plateau is much higher than that of in the same latitudes at 200-30 hPa layer, it is also higher than that of in the same longitudes at 100-60 hPa layer. There is inverse correlation between the zonal distribution of NOx and the zonal distribution of 03 from 100 to 30 hPa; In summer near 100 hPa and from 70 hPa to 35 hPa the negative correlation between the time series of mixing ratios of NOx and O3 over the Qinghai-Xizang Plateau is very evident.