Comparison of Cloud‐Top Property Retrievals From Advanced Himawari Imager, MODIS, CloudSat/CPR, CALIPSO/CALIOP, and Radiosonde
Comparison of Cloud‐Top Property Retrievals From Advanced Himawari Imager, MODIS, CloudSat/CPR, CALIPSO/CALIOP, and Radiosonde
复制标题
DOI：
10.1029/2020jd032683
复制
发表时间：
2020-07
期刊：
影响因子：
--
通讯作者：
Chian‐Yi Liu;C. Chiu;P. Lin;Min Min-Min
中科院分区：
文献类型：
--
作者：
Chian‐Yi Liu;C. Chiu;P. Lin;Min Min-Min
云的性质和微物理特征信息对于天气、气候、水文、绿色能源和地球能量收支等环境研究和应用至关重要。新一代地球同步卫星的发射，例如日本的Himawari-8，可以通过多通道观测检索云信息。为了确认Himawari-8（Himawari-8/AHI）上的高级Himawari成像仪（AHI）的检索结果，本研究访问了来自AHI的云检索结果，并将其与低地球轨道卫星上的星载被动和主动传感器（如NASA的CloudSat，Cloud-Aerosol Lidar和Infrared Pathfinder Satellite Observations（CALIPSO））进行了比较。在南海季风爆发季节云变率较大的情况下，两次海上考察获得了云顶温度和云顶高度的反演资料，并对反演资料进行了分析，以确保全面的相互比较。结果表明，从AHI反演的云顶高度、云光学厚度和云有效粒子半径与被动中分辨率成像光谱仪（MODIS）数据一致。此外，星载主动云优先雷达（CPR）和正交偏振云气溶胶激光雷达（CALIOP）数据都证实了云顶高度的低不确定性，特别是当云在光学上很厚时。在光学薄云中，这些数据之间的云顶高度差异很大，这可能是由于有限的AHI光谱通道或仪器空间分辨率造成的。无论是液态云还是冰相云的云顶温度和高度都与同位探空廓线吻合得很好，分别只有1 K和170 m的小差异。
The information on cloud properties and microphysical characteristics is critical for environmental research and application, such as that on weather, climate, hydrology, and green energy and Earth energy budget. The launch of the new‐generation geostationary satellite, for example, the Japanese Himawari‐8, enables retrieval of cloud information through multichannel observation. To confirm the retrievals from the Advanced Himawari Imager (AHI) onboard Himawari‐8 (Himawari‐8/AHI), this study accessed the cloud retrievals from AHI and compare them against those obtained from spaceborne passive and active sensors on the low Earth orbit satellites, such as NASA's CloudSat, Cloud‐Aerosol Lidar and Infrared Pathfinder Satellite Observations (CALIPSO). The atmospheric thermodynamic state from in situ radiosonde provides another dimension for evaluating the retrieved cloud‐top temperature and height, which were obtained and analyzed during two research cruises over the South China Sea during monsoon onset season with large cloud variability to ensure the comprehensive intercomparisons. The findings show that the cloud‐top altitude, cloud optical thickness, and cloud effective particle radius retrieved from AHI are consistent with passive Moderate Resolution Imaging Spectroradiometer (MODIS) data. Furthermore, both spaceborne active Cloud Priofiling Radar (CPR) and Cloud‐Aerosol Lidar with Orthogonal Polarization (CALIOP) data confirm the low uncertainty of cloud‐top altitude, particularly when the cloud is optically thick. Large cloud‐top altitude discrepancy among these data in the optically thin cloud might be due to the limited AHI spectral channels or instrumental spatial resolutions. The cloud‐top temperature and altitudes in either liquid or ice phase cloud agree well with collocated sounding profiles, with low difference of 1 K and 170 m, respectively.