Average aerosol characteristics in three sectors of the Southern Ocean and the effect of Antarctic islands

摘要

Data of measurements in Russian Antarctic expeditions (51st-62nd RAE) are used to analyze the specific features of thespatial distribution of the atmospheric aerosol optical depth, concentrations of aerosol and absorbing substance (blackcarbon) in the southern part of the World Ocean. We found no statistically significant differences in the average aerosolcharacteristics between three sectors of the Southern Ocean. Near Antarctic islands, we revealed the specific features inthe spatial variations of aerosol characteristics: when the separation distance from islands increases to 250 km, theparticle concentrations become two times larger, and black carbon concentrations become 26% smaller, primarilybecause of the redistribution between contributions of island (local) and maritime sources of aerosol, differing by theconcentrations of aerosol and content of absorbing substance in it.