Assessment of Nighttime Cloud Cover Products from MODIS and Himawari-8 Data with Ground-Based Camera Observations
Assessment of Nighttime Cloud Cover Products from MODIS and Himawari-8 Data with Ground-Based Camera Observations
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DOI：
10.3390/rs14040960
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发表时间：
2022-02-01
期刊：
影响因子：
5
通讯作者：
Shiina, Tatsuo
中科院分区：
文献类型：
--
作者：
Lagrosas, Nofel;Xiafukaiti, Alifu;Shiina, Tatsuo
将不同卫星的云覆盖 (CC) 产品与相同的地面 CC 数据集进行比较，可以提供有关卫星产品之间值的相似性或差异的信息。因此，中分辨率成像光谱仪 (MODIS) Collection 6.1 每日云量产品（MOD06_L2、MYD06_L2、MOD08_D3 和 MYD08_D3）和 Himawari-8 的 42 个月 CC 产品与地面相机数据集进行了比较。比较显示，当相机观测到低 CC 时，MODIS 的 CC 与日本千叶县地面测量 CC 的差异高达 57%。这表明 MODIS 能够捕获从地面无法有效看到的高层云。当相机检测到高 CC（表明存在低层云）时，MODIS 的 CC 相对高于相机的 CC。在 Himawari-8 数据的情况下，当相机观察到低 CC 时，这种差异约为 0.7%。这一结果表明高层云没有被有效观测到，但 Himawari-8 数据与相机观测结果有很好的相关性。当相机观察到高 CC 时，Himawari-8 衍生的 CC 比相机的 CC 低约 10%。这些结果显示了使用相机连续观测夜间云的潜力，以提供可用于夜间卫星 CC 产品之间比较的数据集。
Comparing cloud cover (CC) products from different satellites with the same ground-based CC dataset provides information on the similarities or differences of values among satellite products. For this reason, 42-month CC products from Moderate Resolution Imaging Spectrometer's (MODIS) Collection 6.1 daily cloud cover products (MOD06_L2, MYD06_L2, MOD08_D3, and MYD08_D3) and Himawari-8 are compared with the ground-based camera datasets. The comparison shows that CC from MODIS differs from ground measurement CC by as much as 57% over Chiba, Japan, when low CC is observed by the camera. This indicates MODIS's ability to capture high-level clouds that are not effectively seen from the ground. When the camera detects high CC, an indication of the presence of low-level clouds, CC from MODIS is relatively higher than the CC from the camera. In the case of Himawari-8 data, when the camera observes low CC, this difference is around 0.7%. This result indicates that high-level clouds are not effectively observed, but the Himawari-8 data correlates well with camera observations. When the camera observes high CC, Himawari-8-derived CC is lower by around 10% than CC from the camera. These results show the potential of continuous observations of nighttime clouds using the camera to provide a dataset that can be used for intercomparison among nighttime satellite CC products.