Marine aerosol generation experiments in the High Arctic during summertime DOI Creative Commons
Jessica A. Mirrielees, Rachel M. Kirpes, Emily J. Costa

et al.

Elementa Science of the Anthropocene, Journal Year: 2024, Volume and Issue: 12(1)

Published: Jan. 1, 2024

The rapidly warming Arctic has transitioned to thinner sea ice which fractures, producing leads. Few studies have investigated spray aerosol (SSA) produced from open ocean, leads, and melt ponds, vary in salinity organic microbial community composition. A marine reference tank was deployed aboard an icebreaker the Ocean during August–September 2018 study SSA generated locally collected surface waters. Aerosol generation experiments were carried out using water marginal zone, a human-made hole near North Pole, both lead pond floe drift period. Salinity, chlorophyll a, carbon, nitrogen, composition measured. Eukaryotic plankton bacterial abundance elevated experimental but relative contributions major eukaryotic taxonomic groups varied little across experiments. chemical of individual particles analyzed Raman microspectroscopy computer-controlled scanning electron microscopy with energy-dispersive X-ray spectroscopy. Individual salt aerosol, primary mineral dust observed. Sea constituted 44–95% submicrometer 68–100% supermicrometer particles, by number, each experiment. Carbon detected 85%, visible coatings. Carbohydrates 72% smaller long-chain fatty acids (13%) siliceous material (15%). contained only material. Quantification ice-nucleating activity showed that may define High background particle population, cannot account for peak atmospheric concentrations As warms, increasing emissions complex dependence on changing biological physical processes.

Language: Английский

Modeling the contribution of leads to sea spray aerosol in the high Arctic DOI Creative Commons
Rémy Lapere, Louis Marelle, Pierre Rampal

et al.

Atmospheric chemistry and physics, Journal Year: 2024, Volume and Issue: 24(21), P. 12107 - 12132

Published: Oct. 30, 2024

Abstract. Elongated open-water areas in sea ice (leads) release spray particles to the atmosphere. However, there is limited knowledge on amount, properties and drivers of emitted from leads, no existing parameterization this process available for use models. In work, we measurements aerosol fluxes Nilsson et al. (2001) produce an estimate location, timing amount emissions leads at scale Arctic Ocean 1 year. Lead fractions are derived using data sets numerical models satellite detection. The proposed estimates that account 0.3 %–9.8 % annual salt number regions where concentration greater than 80 %. Assuming similar size distributions those open ocean, 30 %–85 mass regions. total 0.1–2.1 Tg yr−1, comparable transported above according MERRA-2 reanalysis. addition providing first possible upper lower bounds conceptual model developed work implemented tested regional atmospheric chemistry WRF-Chem. Given obtained impact clouds radiative budget needs be further explored.

Language: Английский

Citations

2
Marine aerosol generation experiments in the High Arctic during summertime DOI Creative Commons
Jessica A. Mirrielees, Rachel M. Kirpes, Emily J. Costa

et al.

Elementa Science of the Anthropocene, Journal Year: 2024, Volume and Issue: 12(1)

Published: Jan. 1, 2024

The rapidly warming Arctic has transitioned to thinner sea ice which fractures, producing leads. Few studies have investigated spray aerosol (SSA) produced from open ocean, leads, and melt ponds, vary in salinity organic microbial community composition. A marine reference tank was deployed aboard an icebreaker the Ocean during August–September 2018 study SSA generated locally collected surface waters. Aerosol generation experiments were carried out using water marginal zone, a human-made hole near North Pole, both lead pond floe drift period. Salinity, chlorophyll a, carbon, nitrogen, composition measured. Eukaryotic plankton bacterial abundance elevated experimental but relative contributions major eukaryotic taxonomic groups varied little across experiments. chemical of individual particles analyzed Raman microspectroscopy computer-controlled scanning electron microscopy with energy-dispersive X-ray spectroscopy. Individual salt aerosol, primary mineral dust observed. Sea constituted 44–95% submicrometer 68–100% supermicrometer particles, by number, each experiment. Carbon detected 85%, visible coatings. Carbohydrates 72% smaller long-chain fatty acids (13%) siliceous material (15%). contained only material. Quantification ice-nucleating activity showed that may define High background particle population, cannot account for peak atmospheric concentrations As warms, increasing emissions complex dependence on changing biological physical processes.

Language: Английский

Citations

0