Upward transport of bottom-ice dimethyl sulfide during advanced melting of arctic first-year sea ice
Bibliographic Data
| ID | 19569169 |
|---|---|
| Authors | Margaux Gourdal, Odile Crabeck (University of East Anglia), Martine Lizotte (0000-0002-7639-2819), Virginie Galindo (0000-0002-8803-9828, Université du Québec à Rimouski), Michel Gosselin (0000-0002-1044-0793, Université du Québec à Rimouski), Marcel Babin (0000-0001-9233-2253), Michael Scarratt (0000-0001-9708-2126, Fisheries and Oceans Canada), Maurice Levasseur |
| Editors | Jody W Deming, Kevin Arrigo |
| Year | 2019 |
| Volume | 7 |
| Publication date | 2019-01-01 |
| Peer Reviewed | Yes |
| Open Access | Yes |
| Type | ARTICLE |
| Venue | Elementa Science of the Anthropocene (JOURNAL) |
| Journal identifiers | ISSN: 2325-1026 • E-ISSN: 2325-1026 |
| Publisher | University of California Press (PUBLISHER • US) |
| DOI | 10.1525/elementa.370 |
| OpenAlex | W2967556802 |
| Language | EN |
| Citations received | 3 |
| References cited | 90 |
This paper presents the first empirical estimates of dimethyl sulfide (DMS) gas fluxes across permeable sea ice in the Arctic. DMS is known to act as a major potential source of aerosols that strongly influence the Earth’s radiative balance in remote marine regions during the ice-free season. Results from a sampling campaign, undertaken in 2015 between June 2 and June 28 in the ice-covered Western Baffin Bay, revealed the presence of high algal biomass in the bottom 0.1-m section of sea ice (21 to 380 μg Chl a L–1) combined with the presence of high DMS concentrations (212–840 nmol L–1). While ice algae acted as local sources of DMS in bottom sea ice, thermohaline changes within the brine network, from gravity drainage to vertical stabilization, exerted strong control on the distribution of DMS within the interior of the ice. We estimated both the mean DMS molecular diffusion coefficient in brine (5.2 × 10–5 cm2 s–1 ± 51% relative S.D., n = 10) and the mean bulk transport coefficient within sea ice (33 × 10–5 cm2 s–1 ± 41% relative S.D., n = 10). The estimated DMS fluxes ± S.D. from the bottom ice to the atmosphere ranged between 0.47 ± 0.08 μmol m–2 d–1 (n = 5, diffusion) and 0.40 ± 0.15 μmol m–2 d–1 (n = 5, bulk transport) during the vertically stable phase. These fluxes fall within the lower range of direct summer sea-to-air DMS fluxes reported in the Arctic. Our results indicate that upward transport of DMS, from the algal-rich bottom of first-year sea ice through the permeable sea ice, may represent an important pathway for this biogenic gas toward the atmosphere in ice-covered oceans in spring and summer
Arctic · Arctic ice pack · Atmospheric sciences · Dimethyl sulfide · Drift ice · Sea ice · Sea ice thickness · Arctic and Antarctic ice dynamics · Atmospheric and Environmental Gas Dynamics · Atmospheric chemistry and aerosols · Chemistry · Environmental Science · Geology · Oceanography
Environmental factors influencing the seasonal dynamics of spring algal blooms in and beneath sea ice in western Baffin Bay
The biogenic sulfur cycle in the coupled ocean–sea ice–atmosphere system
Simulated increases of future Arctic dimethylsulfide ocean concentrations, emissions and high-flux events
| Unique citing works | 3 |
|---|---|
| Citations per year | 0.43 |
| Citation span | 2019 - 2026 (8) |
| Citation velocity | current |
| Highly cited | No |
| Citation types | Neutral: 3 |