Gravity‐wave‐scale temperature fluctuations seen by the UARS MLS
Gravity‐wave‐scale temperature fluctuations seen by the UARS MLS
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DOI：
10.1029/96gl02924
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发表时间：
1996-11
影响因子：
5.2
通讯作者：
Dong L. Wu;J. Waters
中科院分区：
文献类型：
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作者：
Dong L. Wu;J. Waters
高层大气研究卫星(UARS)微波肢体探测仪(MLS)在一次特殊的肢体跟踪操作中观测到了中小尺度的温度波动。对1994年12月下旬资料的分析表明，与对流层高层对流和平流层极涡有关的10‘S-100’S公里的水平尺度上存在着显著的辐射起伏。观测到了相干性和振幅随高度的增长，显示出垂直传播波的存在。为肢体跟踪日生成的方差图进一步表明，MLS仪器可以在肢体扫描和肢体跟踪观测模式下测量不到100公里尺度的水平温度变化。
The Upper Atmosphere Research Satellite (UARS) Microwave Limb Sounder (MLS) has observed small- and meso-scale temperature fluctuations during a special limb-tracking operation. Analysis of late-December 1994 data shows that there exist significant radiance fluctuations with horizontal scales of 10's–100's km associated with upper tropospheric convection and the stratospheric polar vortex. Phase coherence and amplitude growth with height are observed, showing the presence of vertically propagating waves. Variance maps generated for the limb-tracking days further show that the MLS instrument can measure horizontal temperature variations at scales less than 100 km in both limb-scanning and limb-tracking observation modes.