AIRS卫星温度和臭氧廓线在南极的验证分析

Validation of AIRS temperature and ozone profiles over Antarctica

利用2008年中山站、Amundesen-Scott(SouthPole)站和Neumayer站为期一年的温度和臭氧探空数据,对AIRS第六版温度和臭氧垂直廓线产品在南极的精度进行了验证.结果表明,AIRS温度与探空温度总体上具有显著的一致性,其中对流层偏差最小(RMSe<2℃),近地面温度由于受到下垫面影响偏差略大(RMSe^2℃),平流层偏差较大(2℃<RMSe<3℃),AIRS温度平均低于探空观测且受季节变化影响显著,秋冬季偏差整体上高于春夏季.AIRS臭氧反演精度在平流层(RMSe^25%)要优于对流层(RMSe^30%),RMSe最大值出现在UT-LS区域(可达40%)且在"臭氧洞"期间明显增大.AIRS产品精度在南极沿岸和内陆存在差异,由于南极地区探空资料较少且主要位于沿海,故在南极内陆地区进行探空观测对于提高卫星资料精度,改善该区域天气预报能力具有重大意义.

Using the temperature and ozone sounding data from Zhongshan Station,AmundesenScott Station(SouthPole)and Neumayer Station in 2008 for one year,the accuracy of the sixth version of Atmospheric Infrared Sounder(AIRS)temperature and ozone vertical profile products was verified in Antarctica.The results show that the AIRS temperature and the sounding temperature have significant consistency in general.The tropospheric deviation is the smallest(RMSe<2℃),but the near-surface temperature bias is slightly higher due to the influence of the underlying surface(RMSe^2℃).The stratospheric deviation is larger(2℃<RMSe<3℃).The average temperature of AIRS is lower than the sounding observation and has obviously seasonal variation.The deviations in autumn and winter are generally higher than that in spring and summer.The accuracy of AIRS ozone inversion in the stratosphere(RMSe^25%)is better than that in the troposphere(RMSe^30%).The maximum value of RMSe appears in the UT-LS region(up to 40%)and increases significantly during the"ozone hole"periods.The accuracy of AIRS products varies between the Antarctic coast and the inland.As there is few soundingexperiments in the Antarctic area and it is mainly located along the coast,conducting sounding observations in the Antarctic inland area is of great significance to improve the accuracy of satellite data and improve the weather forecast capabilities of the region。