Comparison of radar/radiometer retrievals of stratus cloud liquid‐water content profiles with in situ measurements by aircraft
Comparison of radar/radiometer retrievals of stratus cloud liquid‐water content profiles with in situ measurements by aircraft
复制标题
雷达/辐射计反演层云液态水含量剖面与飞机现场测量的比较
DOI：
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发表时间：
2000
期刊：
影响因子：
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通讯作者：
M. Poellot
中科院分区：
文献类型：
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作者：
A. Frisch;B. Martner;I. Djalalova;M. Poellot
1997年在俄克拉何马州使用飞机对云滴进行现场取样，以评估一种检索云液态水含量剖面的地面遥感技术。该技术利用高灵敏度毫米波长雷达和双频微波辐射计的垂直指向测量来获得层状云液体含量的高度分辨估计。与飞机的测量结果进行了比较，在遥感站点1.5公里半径内，有16座立交桥穿过薄云层。在0.04至0.57 g m -3的液态水含量范围内，飞机与雷达/辐射计值之间的平均差值为0.02 g m -3，最大差值为0.09 g m -3。虽然比较的次数有限，但这些结果表明，对许多科学目的而言，基于地面的估计可能足够准确。
In situ sampling of cloud droplets by aircraft in Oklahoma in 1997 is used to evaluate a ground-based remote sensing technique for retrieving profiles of cloud liquid-water content. The technique uses vertically pointing measurements from a high-sensitivity millimeter-wavelength radar and a collocated dual-frequency microwave radiometer to obtain height-resolved estimates of the liquid content of stratiform clouds. Comparisons with the aircraft measurements are made for 16 overpasses through thin cloud layers within a 1.5-km radius of the remote sensor site. Over a range of liquid-water contents from 0.04 to 0.57 g m -3 the mean difference between the aircraft and the radar/radiometer values was 0.02 g m -3 , and the maximum difference was 0.09 g m -3 . Although the number of comparisons is limited, these results suggest that the ground-based estimates may be sufficiently accurate for many scientific purposes.