Effects of long-range aerosol transport on the microphysical properties of low-level liquid clouds in the Arctic

摘要: Abstract. The properties of low-level liquid clouds in the Arctic can be altered by long-range pollution transport to region. Satellite, tracer model, and meteorological data sets are used here determine a net aerosol–cloud interaction (ACInet) parameter that expresses ratio relative changes cloud microphysical variations concentrations while accounting for dry or wet scavenging aerosols en route Arctic. For period between 2008 2010, ACInet is calculated as function water path, temperature, altitude, specific humidity, lower tropospheric stability. all data, averages 0.12 ± 0.02 cloud-droplet effective radius 0.16 ± 0.02 optical depth. It increases with humidity stability highest when low. Carefully controlling conditions we find path arctic does not respond strongly within plumes. Or, stratifying according state lead artificially exaggerated calculations magnitude impacts on clouds.