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Migon, Christophe; Sandroni, Valérie; Marty, Jean-Claude; Gasser, Beate; Miquel, Juan Carlos (2002): Trace-metal fluxes of the atmosphere and at DYFAMED sediment traps [dataset publication series]. PANGAEA, https://doi.org/10.1594/PANGAEA.738637, Supplement to: Migon, C et al. (2002): Transfer of atmospheric matter through the euphotic layer in the northwestern Mediterranean: seasonal pattern and driving forces. Deep Sea Research Part I: Oceanographic Research Papers, 49(11), 2125-2141, https://doi.org/10.1016/S0967-0645(02)00031-0

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Abstract:
The transfer of atmospheric particulate matter through the surface marine layer was studied by comparing atmospheric and marine fluxes. Time series were obtained from the coupling of a coastal atmospheric sampling station (Cap Ferrat, French Riviera) and a marine sampling site (DYFAMED site, central Ligurian Sea). Liquid phase traps were used for measuring total atmospheric fluxes and sediment traps deployed at 200 m depth for measuring marine fluxes. Fluxes of mass, aluminium, and soluble anthropogenic metals (Cd, Pb and Zn) were obtained from both these reservoirs. Physical and biological time series data acquired at the DYFAMED site also were used to describe a three-step seasonal transfer scenario:
(i) In summer and autumn, during the period of water stratification, marine fluxes are low and do not account for the transfer of lithogenic material, as revealed by low Al to mass flux ratios and high proportions of organic carbon at 200 m depth. Atmospheric material accumulates along the thermocline, while a series of physico-chemical processes lead to the formation of small (<=150 µm) non-biogenic organic aggregates.
(ii) In winter, the sinking of dense water that occurs in the Ligurian Sea is responsible for a rapid downward transfer of the lithogenic matter accumulated in the surface layer. The fact that soluble trace metals (e.g., cadmium) accumulated in the surface layer are only partially found in sediment traps may indicate that sorption processes play a minor role in the formation of organic aggregates, compared with coagulation processes.
(iii) In spring, nutrients brought to surface waters by the winter vertical mixing allow phytoplanktonic blooms, and the transfer of atmospheric matter is then governed by the temporal variations of biological activity.
The seasonal variability of the vertical transfer leads to the concept of seasonal variability of elemental residence times in the euphotic layer.
Project(s):
Biogeochemical Processes in the Oceans and Fluxes (PROOF)
Joint Global Ocean Flux Study (JGOFS)
Mediterranean Data Archaeology and Rescue (MEDAR/MEDATLAS)
Funding:
European Commission (EC), grant/award no. ERBIC20-CT98-0103: Mediterranean Data Archaeology and Rescue
European Commission (EC), grant/award no. MAS3-CT98-0174: Mediterranean Data Archaeology and Rescue
Coverage:
Median Latitude: 43.470306 * Median Longitude: 7.264333 * South-bound Latitude: 43.427700 * West-bound Longitude: 7.252200 * North-bound Latitude: 43.683333 * East-bound Longitude: 7.325000
Date/Time Start: 1994-11-07T00:00:00 * Date/Time End: 1998-06-29T00:00:00
Event(s):
Cap_Ferrat * Latitude: 43.683333 * Longitude: 7.325000 * Date/Time Start: 1997-02-01T00:00:00 * Date/Time End: 1998-07-30T00:00:00 * Elevation: 130.0 m * Campaign: DYFAMED * Basis: Time-series station * Method/Device: Research station (RS)
DYF18 * Latitude: 43.427700 * Longitude: 7.252200 * Date/Time Start: 1994-06-10T00:00:00 * Date/Time End: 1994-12-09T00:00:00 * Campaign: DYFAMED * Basis: Time-series station * Method/Device: Trap (TRAP) * Comment: Position of the DYFAMED primary station.
DYF19 * Latitude: 43.427700 * Longitude: 7.252200 * Date/Time Start: 1994-12-10T00:00:00 * Date/Time End: 1995-05-01T00:00:00 * Campaign: DYFAMED * Basis: Time-series station * Method/Device: Trap (TRAP) * Comment: Position of the DYFAMED primary station.
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
6 datasets

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Datasets listed in this publication series

  1. Migon, C; Sandroni, V; Marty, J-C et al. (2002): (Table 1) Atmospheric Al, mass, Cd, Pb and Zn fluxes. https://doi.org/10.1594/PANGAEA.738636
  2. Migon, C; Sandroni, V; Marty, J-C et al. (2002): Trace-metal content at trap DYF18. https://doi.org/10.1594/PANGAEA.183733
  3. Migon, C; Sandroni, V; Marty, J-C et al. (2002): Trace-metal content at trap DYF19. https://doi.org/10.1594/PANGAEA.183734
  4. Migon, C; Sandroni, V; Marty, J-C et al. (2002): Trace-metal content at trap DYF21. https://doi.org/10.1594/PANGAEA.183735
  5. Migon, C; Sandroni, V; Marty, J-C et al. (2002): Trace-metal fluxes at trap DYF23. https://doi.org/10.1594/PANGAEA.183730
  6. Migon, C; Sandroni, V; Marty, J-C et al. (2002): Trace-metal fluxes at trap DYF24. https://doi.org/10.1594/PANGAEA.183731