Marine organic aerosol at Mace Head: effects from phytoplankton and source region variability DOI Creative Commons
Emmanuel Chevassus, Kirsten N. Fossum, Darius Čeburnis

et al.

Atmospheric chemistry and physics, Journal Year: 2025, Volume and Issue: 25(7), P. 4107 - 4129

Published: April 10, 2025

Abstract. Organic aerosol (OA) is recognized as a significant component of particulate matter (PM), yet their specific composition and sources, especially over remote areas, remain elusive due to the overall scarcity high-resolution online data. In this study, positive matrix factorization was performed on organic mass spectra obtained from time-of-flight spectrometer (HR-ToF-AMS) measurements resolve sources contributing coastal PM. The focus summertime period marked by enhanced biological productivity with prevailing pristine maritime conditions. Four OA factors were deconvolved source apportionment model. analysis revealed primary marine (PMOA) predominant submicron at Mace Head during summertime, accounting for 42 % total resolved mass. This trailed more oxidized oxygenated (MO-OOA) 32 %, methanesulfonic acid (MSA-OA) 17 locally emitted peat-derived (peat-OA) 9 Elemental ratios (O:C–H:C) derived each these factors: PMOA (0.66–1.16), MO-OOA (0.78–1.39), MSA-OA (0.66–1.39), peat-OA (0.43–1.34). O:C–H:C range hints aliphatic lignin-like compounds formation. concentrations secondary equal almost exclusively present in boundary layer, agreement previous findings. study reveals that not only reflects atmospheric chemistry meteorology – evidenced ageing polar air masses North Atlantic, driven ozonolysis under Greenland anticyclonic conditions but also serves an indicator ecosystems. evident being notably associated stress enzyme markers showing typical makeup largely abacterial phytoplankton extracellular metabolic processes. distinct regions within Atlantic factors. primarily Iceland Basin, rapid production following coccolithophore blooms (lag 1–2 d), while diatoms contribute slower formation process reflecting oceanic contrast, sourced variable ecoregions, including southern Celtic Sea, western European Newfoundland additional contributions chlorophytes cyanobacteria southerly latitudes. Overall, findings emphasize need longer-term investigations further map influence taxa variability broader impacts aerosol–climate interactions.

Language: Английский

Shipping-related air pollution at Busan Port: the unceasing threat of black carbon DOI
Andrew Loh, Donghwi Kim,

Joon Geon An

et al.

Journal of Hazardous Materials, Journal Year: 2025, Volume and Issue: unknown, P. 137434 - 137434

Published: Jan. 1, 2025

Language: Английский

Citations

0
Marine organic aerosol at Mace Head: effects from phytoplankton and source region variability DOI Creative Commons
Emmanuel Chevassus, Kirsten N. Fossum, Darius Čeburnis

et al.

Atmospheric chemistry and physics, Journal Year: 2025, Volume and Issue: 25(7), P. 4107 - 4129

Published: April 10, 2025

Abstract. Organic aerosol (OA) is recognized as a significant component of particulate matter (PM), yet their specific composition and sources, especially over remote areas, remain elusive due to the overall scarcity high-resolution online data. In this study, positive matrix factorization was performed on organic mass spectra obtained from time-of-flight spectrometer (HR-ToF-AMS) measurements resolve sources contributing coastal PM. The focus summertime period marked by enhanced biological productivity with prevailing pristine maritime conditions. Four OA factors were deconvolved source apportionment model. analysis revealed primary marine (PMOA) predominant submicron at Mace Head during summertime, accounting for 42 % total resolved mass. This trailed more oxidized oxygenated (MO-OOA) 32 %, methanesulfonic acid (MSA-OA) 17 locally emitted peat-derived (peat-OA) 9 Elemental ratios (O:C–H:C) derived each these factors: PMOA (0.66–1.16), MO-OOA (0.78–1.39), MSA-OA (0.66–1.39), peat-OA (0.43–1.34). O:C–H:C range hints aliphatic lignin-like compounds formation. concentrations secondary equal almost exclusively present in boundary layer, agreement previous findings. study reveals that not only reflects atmospheric chemistry meteorology – evidenced ageing polar air masses North Atlantic, driven ozonolysis under Greenland anticyclonic conditions but also serves an indicator ecosystems. evident being notably associated stress enzyme markers showing typical makeup largely abacterial phytoplankton extracellular metabolic processes. distinct regions within Atlantic factors. primarily Iceland Basin, rapid production following coccolithophore blooms (lag 1–2 d), while diatoms contribute slower formation process reflecting oceanic contrast, sourced variable ecoregions, including southern Celtic Sea, western European Newfoundland additional contributions chlorophytes cyanobacteria southerly latitudes. Overall, findings emphasize need longer-term investigations further map influence taxa variability broader impacts aerosol–climate interactions.

Language: Английский

Citations

0