Interactive comment on “Relationship between low-cloud presence and the amount of overlying aerosols” by C. E. Chung et al
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چکیده
This manuscript compares statistics of the CALIPSO derived aerosol optical depth (AOD) above low level clouds to that in cloud free scenes. Results are presented for both daytime and nighttime retrievals of AOD. The work illustrates that there are some differences in the AOD above low cloud and the AOD in clear skies in the daytime retrievals e.g. over the southeast Atlantic in SON. These are however not apparent in the nighttime retrievals. This is very suggestive of a bias in the satellite retrieval of AOD during the daytime.
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Interactive comment on “Relationship between low-cloud presence and the amount of overlying aerosols” by C. E. Chung et al
We thank the reviewer for well understanding the key point of the paper. About the AOD difference over the southeast Atlantic, as the reviewer suspected, this could be due to a bias in retrieval algorithm. This could also be a real phenomenon as the cloud over this part of the world has a strong diurnal cycle. Examining this aspect to the full (especially the retrieval algorithm) would require ...
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1. The author should highlights why CALIPSO data are used in this study? Since there are some studies indicate that the CALIPSO derived above-cloud AOD are lower than other satellites sensors in the A-Train. 2. Do you consider the multilayer cloud with the existence of aerosols in this study? For example, aerosols above lower layer clouds but below the upper layer clouds? 3. When you calculate ...
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