Influence of short-term synoptic events and snow depth on DMS, DMSP, and DMSO dynamics in Antarctic spring sea ice
Datos Bibliográficos
| ID | 19568227 |
|---|---|
| Autores | Gauthier Carnat (Université Libre de Bruxelles), Frédéric Brabant (Université Libre de Bruxelles), Isabelle Dumont (0000-0002-7595-4074, Université Libre de Bruxelles), Martin Vancoppenolle (0000-0002-7573-8582, Centre National de la Recherche Scientifique), Stephen F Ackley (0000-0003-4399-9232, The University of Texas at San Antonio), Chris Fritsen (Desert Research Institute), Bruno Delille (0000-0003-0502-8101, University of Liège), Jean-Louis Tison, Jean‐Louis Tison (0000-0002-9758-3454, Université Libre de Bruxelles) |
| Editores | Jody W Deming, Jean-Éric Tremblay |
| Año | 2016 |
| Volumen | 4 |
| Fecha de publicación | 2016-01-01 |
| Open Access | Sí |
| Tipo | ARTICLE |
| Revista | Elementa Science of the Anthropocene (JOURNAL) |
| Identificadores de la revista | ISSN: 2325-1026 • E-ISSN: 2325-1026 |
| Editorial | University of California Press (PUBLISHER • US) |
| DOI | 10.12952/journal.elementa.000135 |
| OpenAlex | W2550672951 |
| Idioma | EN |
| Citas recibidas | 2 |
| Referencias citadas | 64 |
Temporal changes in the concentration profiles of dimethylsulfide (DMS), dimethylsulfoniopropionate (DMSP), and dimethylsulfoxide (DMSO) were measured in pack ice from the Bellingshausen Sea (Antarctica) during the winter-spring transition of 2007. Two sites with contrasting snow and ice thicknesses were sampled, with high concentrations of DMS, DMSP, and DMSO observed at both sites, especially in surface ice. These high concentrations were shown to correspond to the development of a surface ice microalgal community dominated by strong DMSP producers (flagellates and dinoflagellates) following flooding of the ice cover. Several short-term synoptic events were observed and shown to influence strongly the dynamics of sea ice DMS, DMSP, and DMSO. In particular, a cold spell event was associated with drastic changes in the environmental conditions for the sea ice microbial communities and to a remarkable increase in the production of dimethylated sulfur compounds at both sites. A good correlation between all dimethylated sulfur compounds, sea ice temperature, and brine salinity suggested that the observed increase was triggered mainly by increased thermal and osmotic stresses on microalgal cells. Atmospheric forcing, by controlling sea ice temperature and hence the connectivity and instability of the brine network, was also shown to constrain the transfer of dimethylated sulfur compounds in the ice towards the ocean via brine drainage. Analysis of the two contrasting sampling sites shed light on the key role played by the snow cover in the sea ice DMS cycle. Thicker snow cover, by insulating the underlying sea ice, reduced the amplitude of environmental changes associated with the cold spell, leading to a weaker physiological response and DMS, DMSP, and DMSO production. Thicker snow also hampered the development of steep gradients in sea ice temperature and brine salinity, thereby decreasing the potential for the release of dimethylated sulfur compounds to the ocean via brine drainage
Antarctic sea ice · Arctic ice pack · Climatology · Cryosphere · Dimethylsulfoniopropionate · Nutrient · Phytoplankton · Sea ice · Snow · Arctic and Antarctic ice dynamics · Atmospheric chemistry and aerosols · Chemistry · Environmental Science · Marine and coastal ecosystems · Geology · Oceanography
| Citas por año | 0,22 |
|---|---|
| Intervalo de citas | 2017 - 2023 (7) |
| Altamente citado | No |