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Influence of Biogenic Organics on the Chemical Composition of Arctic Aerosols

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Title
Influence of Biogenic Organics on the Chemical Composition of Arctic Aerosols
Other Titles
북극 대기 에어로졸의 화학특성에 생물기원 유기물이 미치는 영향
Authors
최정훈
장은호
Yoon, Young Jun
Park, J.
김태욱
Silvia Becagli
Laura Caiazzo
David Cappeletti
Radovan Krejci
Kostantinos Eleftheriadis
Park, Ki-Tae
장경순
Keywords
Arctic aerosols; Biogenic organics; FT-ICR MS
Issue Date
2019
Citation
최정훈, et al. 2019. "Influence of Biogenic Organics on the Chemical Composition of Arctic Aerosols". GLOBAL BIOGEOCHEMICAL CYCLES, 33(10): 1238-1250.
Abstract
We use an ultrahigh-resolution 15 Tesla Fourier transform ion cyclotron resonance mass spectrometer (15T FT-ICR MS) to elucidate the compositional changes in Arctic organic aerosols collected at Ny-Alesund, Svalbard, in May 2015. The FT-ICR MS analysis of airborne organic matter provided information on the molecular compositions of aerosol particles collected during the Arctic spring period. The air mass transport history, combined with satellite-derived geographical information and chlorophyll concentration data, revealed that the molecular compositions of organic aerosols drastically differed depending on the origin of the potential source region. The protein and lignin compound populations contributed more than 70% of the total intensity of assigned molecules when the air masses mainly passed over the ocean region. Interestingly, the intensity of microbe-derived organics (protein and carbohydrate compounds) was positively correlated with the air mass exposure to phytoplankton biomass proxied as chlorophyll. Furthermore, the intensities of lignin and unsaturated hydrocarbon compounds, typically derived from terrestrial vegetation, increased with an increase in the advection time of the air mass over the ocean domain. These results suggest that the accumulation of dissolved biogenic organics in the Arctic Ocean possibly derived from both phytoplankton and terrestrial vegetation could significantly influence the chemical properties of Arctic organic aerosols during a productive spring period. The interpretation of molecular changes in organic aerosols using an ultrahigh-resolution mass spectrometer could provide deep insight for understanding organic aerosols in the atmosphere over the Arctic and the relationship of organic aerosols with biogeochemical processes in terms of aerosol formation and environmental changes.
URI
http://repository.kopri.re.kr/handle/201206/10123
DOI
http://dx.doi.org/10.1029/2019GB006226
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