青藏高原及周边地区AIRS卫星温度 廓线产品探空检验分析
- 文章编号:
- 2096-1618(2017)增-0032-09
- 摘要:
- 根据Aura大气红外探测器(AIRS)(V6)温度廓线(TAIRS),采用线性插值和平均核函数平滑卷积方法降低了青藏高原(改则、那曲、拉萨、林芝和阿里)及周边地区(大理、理塘和腾冲)主要以Vaisala RS92观测的探空温度廓线数据垂直分辨率,分别得到基于线性内插和核函数平滑的两组探空温度廓线:Tsonde-I和Tsonde-K,用于检验TAIRS在青藏高原误差特征。结果表明,相对于Tsonde-I,TAIRS平均误差(MB),均方根误差(RSM)和中值(MeB)分别为-0.7 K,2.2 K,-0.7 K(n=284),而相对于Tsonde-K,对应的误差则分别为-0.6 K,1.7 K和-0.5 K。平均核函数的卷积平滑处理的探空温度廓线,Tsonde-K优于Tsonde-I用于检验TAIRS的误差分布。相对于Tsonde-K,在平流层、对流层顶附近及对流层TAIRS的MB分别为-0.3±1.4 K,-0.4±1.2 K,-0.5±1.7 K。TAIRS的误差在高原及其周边地区呈现季节差异,2-3月300 hPa以下偏暖0.5 K但对流层顶及其以上平流层则分别偏冷0.4和2.0 K(n=49); 5-6月对流层内和平流层内分别偏冷0.9 K和偏暖0.1 K(n=88); 7-9月除了在21～43 hPa和71～103 hPa分别偏暖0.2 K和0.3 K(n=145)外,其余部分都偏冷。
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备注/Memo
收稿日期:2017-04-24