Abstract
This paper describes a new global dataset of cloud properties observed by MODIS relying on the current (collection 6.1) processing of MODIS data and produced to facilitate comparison with results from the MODIS observational proxy used in climate models. The dataset merges observations from the two MODIS instruments into a single netCDF file. Statistics (mean, standard deviation, number of observations) are accumulated over daily and monthly time scales on an equal-5 angle grid for viewing and illumination geometry, cloud detection, cloud-top pressure, and cloud properties (optical thickness, effective particle size, water path) partitioned by thermodynamic phase and an assessment as to whether the underlying observations come from fully- or partly-cloudy pixels. Similarly partitioned joint histograms are available for (1) optical thickness and cloud-top pressure, (2) optical thickness and particle size, and (3) cloud water path and particle size. Differences with standard data products, caveats for data use, and guidelines for comparison to the MODIS simulator are described. Data 10 are available on daily (NASA, 2022a, doi:10.5067/MODIS/MCD06COSP_D3_MODIS.062) and monthly (NASA, 2022b, doi:10.5067/MODIS/MCD06COSP_M3_MODIS.062) timescales.
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