Comment on acp-2021-381

Abstract

Using a total of 20 non-precipitating single-layer marine boundary layer (MBL) stratus and stratocumulus cloud cases over the eastern north Atlantic (ENA) ocean, this study investigates the impacts of the environmental variables on the aerosol-cloud interaction (ACIr). Interesting results have been found with valuable discussions. For example, it shows that the ACIr values vary from -0.004 to 0.207 with increasing precipitable water vapor (PWV) conditions, indicating that re is more sensitive to the CCN loading under sufficient water vapor supply, owing to the combined effect of enhanced condensational growth and coalescence processes associated with higher cloud droplets and PWV. The paper is also well written. I would recommend its acceptance for publication after necessary minor revisions.