Cloud filter for CO retrieval from IMG infrared spectra using ECMWF temperatures and POLDER cloud data
Cloud filter for CO retrieval from IMG infrared spectra using ECMWF temperatures and POLDER cloud data
复制标题
使用 ECMWF 温度和 POLDER 云数据从 IMG 红外光谱中检索 CO 的云过滤器
DOI：
10.1029/2000gl012342
复制
发表时间：
2001
影响因子：
5.2
通讯作者：
C. Boonne
中科院分区：
文献类型：
--
作者：
J. Hadji;C. Clerbaux;P. Couvert;P. Chazette;C. Boonne
红外大气测量提供的空间天底看遥感器受到云的存在。为了从IMG仪器测量的辐射光谱中获得无云CO的全球分布，我们开发了一种使用ECMWF模式提供的皮肤温度进行光谱选择的简单方法。关于云量的信息是由POLDER仪器的云数据提供的，该仪器与IMG在同一平台上飞行。我们表明，基于皮肤温度的过滤器，阈值为8 K在海上和15.3 K在陆地上，允许删除大多数多云的情况下。
Infrared atmospheric measurements provided by space nadir looking remote sensors are affected by the presence of clouds. To obtain cloud‐free CO global distributions from the radiance spectra measured by the IMG instrument, we have developed a simple method of spectra selection using skin temperatures provided by the ECMWF model. Information on the cloud cover was provided by the cloud data of the POLDER instrument which flew aboard the same platform as IMG. We show that a filter based on skin temperature, with thresholds of 8 K over sea and 15.3 K over land, allows to remove most of the cloudy cases.