Quality Assessment of Cloud-Top Height Estimates From Satellite IR Radiances Using the CALIPSO Lidar
Quality Assessment of Cloud-Top Height Estimates From Satellite IR Radiances Using the CALIPSO Lidar
复制标题
使用 CALIPSO 激光雷达对卫星红外辐射的云顶高度估计进行质量评估
DOI：
10.1109/tgrs.2012.2210721
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发表时间：
2013
影响因子：
8.2
通讯作者：
I. Genkova
中科院分区：
文献类型：
--
作者：
S. Michele;T. McNally;P. Bauer;I. Genkova
本文总结了利用云气溶胶激光雷达和红外探路者卫星观测（CALIPSO）的数据进行的研究，以验证欧洲中期天气预报中心同化系统背景下的云变量。本文第一部分利用A-Train星座保证的时空重合，将大气红外探测仪（AIRS）辐射量得到的云顶高度（CTH）与CALIPSO得到的相同量进行了比较。在第二部分中，利用CALIPSO的CTH来验证来自Meteosat地球静止云辐射的大气运动矢量（amv）的风高度分配（HA）。考虑了来自AIRS的两种不同估计：一种来自云探测方案，另一种用于红外（IR）云辐射的同化。高光谱红外探测仪云探测的验证揭示了卷云探测的一些困难。CTH对红外云雾辐射同化的验证表明，在激光雷达信号完全衰减而在其他条件下散射较大的情况下，CTH对红外云雾辐射的同化具有合理的一致性。AMV HA的验证表明，高云的CTHs总体倾向于低于CALIPSO，低云的CTHs则相反。有趣的是，在CTHs对红外云雾辐射同化的验证中观察到类似的行为。
This paper summarizes the studies performed using data from the Cloud-Aerosol Lidar and Infrared Pathfinder Satellite Observation (CALIPSO) to verify cloud variables in the context of the European Centre for Medium-Range Weather Forecasts assimilation system. In the first part of this paper, the cloud-top height (CTH) derived from the Atmospheric Infrared Sounder (AIRS) radiances has been compared with the same quantity from CALIPSO exploiting the spatial and temporal coincidence guaranteed by the A-Train constellation. In the second part, the CTH from CALIPSO has been used to verify the wind height assignment (HA) for the atmospheric motion vectors (AMVs) derived from Meteosat geostationary cloudy radiances. Two different estimates from AIRS have been considered: one derived from the cloud detection scheme and the other used within the assimilation of infrared (IR) cloudy radiances. The verification of cloud detection for hyperspectral IR sounders has revealed some difficulties with cirrus clouds. The verification of CTH for the assimilation of IR cloudy radiances has shown a reasonable agreement when the lidar signal is fully attenuated but a larger scatter in other conditions. The verification of AMV HA revealed an overall tendency to produce CTHs lower than CALIPSO for high clouds and the opposite for low clouds. Interestingly, a similar behavior was observed in the validation of CTHs for the assimilation of IR cloudy radiances.
DOI：
10.1109/tgrs.2002.808331
发表时间：
2003-02-01
影响因子：
8.2
作者：
Kawanishi, T;Sezai, T;Spencer, RW
通讯作者：
Spencer, RW