Sources Of Short-Lived Bromocarbons In The Iberian Upwelling System
type: Distribution
access URL: https://hal.science/hal-00998665
format: HTML
issued: 2026-05-05T09:53:07.454818
modified: 2026-05-05T09:53:07.432056

test_moissonnage_selune
type: Agent

Sources Of Short-Lived Bromocarbons In The Iberian Upwelling System
type: Dataset
contact point: Organization
  fn: CCSD
keyword: atlantic-ocean
keyword: bromoform
keyword: macroalgae
keyword: reactive-bromine
keyword: journal-articles
keyword: iodine
keyword: sduoceansciences-of-the-universe-physicsocean-atmosphere
keyword: waters
keyword: release
keyword: coastal
keyword: infoeu-reposemanticsarticle
keyword: mace-head
keyword: volatile-halocarbons
landing page: 1726-4170
description: Seawater concentrations of the four brominated trace gases, dibromomethane (CH(2)Br(2)), bromodichloromethane (CHBrCl(2)), dibromochloromethane (CHBr(2)Cl) and bromoform (CHBr(3)) were measured at different depths of the water column in the Iberian upwelling off Portugal during summer 2007. Statistical analysis of the data set revealed three distinct clusters, caused by different sea surface temperature. Bromocarbon concentrations were elevated in recently upwelled and aged upwelled waters (mean values of 30 pmol l(-1) for CHBr(3)), while concentrations in the open ocean were significantly lower (7.4 pmol l(-1) for CHBr(3)). Comparison with other productive marine areas revealed that the Iberian upwelling had higher halocarbon concentrations than the Mauritanian upwelling. However, the concentrations off the Iberian Peninsula were still much lower than those of coastal macroalgal-influenced waters or those of Polar regions dominated by cold water adapted diatoms. Correlations with biological variables and marker pigments indicated that phytoplankton was a source of bromocarbon in the open ocean. By contrast, in upwelled water masses along the coast, halocarbons showed weaker correlations to marker pigments but were significantly influenced by the tidal frequency. Our results indicate a strong intertidal coastal source of bromocarbon and transport by surface currents of these enriched waters towards the upwelling region.
issued: 2026-05-05T09:53:07.448832
language: en
modified: 2026-05-05T09:53:07.448836