We discuss the results of aerosol studies during high-latitude (81–88.5° N) expedition “North Pole-41” in the Arctic Ocean. The average mass concentrations of black carbon (еВС) in the surface atmospheric layer over 20 months of measurements were 19 ng/m3; volume concentrations of submicron (Vf) and coarse (Vс) aerosol were 0.41 and 0.65 μm3/cm3, respectively. The average aerosol optical depth of the atmosphere at a wavelength of 0.5 mm and the Ångström exponent in the spring periods of 2023 and 2024 were 0.095 and 1.52, respectively. The seasonal variations in the aerosol and black carbon concentrations were well manifested in high-latitude (near-pole) part of the Arctic Ocean. The concentrations were maximal in spring (еВС = 29 ng/m3, Vf = 0.61 μm3/cm3, Vc = 0.77 μm3/cm3) and minimal in June – October (еВС = 11 ng/m3, Vf = 0.13 μm3/cm3, Vc = 0.26 μm3/cm3). The average aerosol characteristics measured in near-pole zone are several-fold lower than the long-term data in more southern regions of the ocean and at polar stations (Barentsburg and “Cape Baranov”).
Arctic Ocean, drifting expedition, aerosol, black carbon, aerosol optical depth
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