Publications

Zhuge, X; Zou, X; Wang, Y (2021). AHI-Derived Daytime Cloud Optical/Microphysical Properties and Their Evaluations With the Collection-6.1 MOD06 Product. IEEE TRANSACTIONS ON GEOSCIENCE AND REMOTE SENSING, 59(8), 6431-6450.

Abstract
Cloud optical/microphysical properties (COMPs) with a high spatiotemporal resolution are required for monitoring the evolution of convective clouds, studying aerosol-cloud-precipitation interactions, and evaluating cloud microphysics parameterization schemes in weather and climate models. This study applied the hispectral method, commonly used for COMP retrievals, to Advanced Himawari Imager (AHI)/Himawari-8 observations. The AHI daytime cloud optical thickness (tau) and cloud-top particle effective radius (Re) retrievals were then evaluated with the Collection-6.1 Moderate Resolution Imaging Spectroradiometer cloud product (MOD06) for a three-month period from June 1, 2017, to August 31, 2017. Overall, the AHI-retrieved COMP results are in good agreement with the MOD06 product. The correlation coefficients of tau and Re between the AHI retrievals and MOD06 products are 0.76-0.89 and 0.63-0.87, respectively. Overestimations are mainly observed in the 1.6-mu m Re (Re-1.6) and ice-phase 3.9-mu m Re (Re-3.9) retrievals. There are tau dependencies in the retrieval biases of tau and Re-1.6, as well as angular dependencies in the retrieval biases of tau and ice-phase Re-3.9. Moreover, the monthly mean composites for three COMP retrievals from the MOD06 and AM algorithms are compared. Significant differences are only found between the two Re-1.6 products. This study also finds that AHI-retrieved Re and tau values have a diurnal variation over land but not over oceans.

DOI:
10.1109/TGRS.2020.3027017

ISSN:
0196-2892