RV Tethys II 20 campaigns to the DYFAMED site from July 2007 to May 2009
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1 DYCOMED Dynamics of chemical contaminants in the Mediterranean Sea: An integrated investigation from the atmosphere to the sea bed Lars-Eric Heimbürger 1,2 Scientific supervisors: Daniel Cossa 1 and Christophe Migon 2 Jean-Francois Chiffoleau 3, Ioanna Bouloubassi 4, Jean-Claude Marty 2, Jacek Tronczynski 3, Laurent Coppola 2, Vincenzo Vellucci 2, Aurélie Dufour 2, Bernard Averty 3, Dominique Auger 3, Emmanuelle Rozouel 3, Grigor Obolenski 2, Francis Louis 2, Celine Bachelier 2, Anne Lorre 4, Marie-Helene Taphanel 4, Frederic Vaultier 4, Floriane Desprez de Gésincourt 2, Emilie Diamond 2, Roger Kerouel 5 and the teams of the RV Tethys II. 1 [IFREMER - Centre de la Méditerranée] 2 [Laboratoire d Océanographie de Villefranche-sur-Mer] 3 [IFREMER - Centre de Nantes] 4 [LOCEAN Univ. Pierre et Marie Curie Paris VI] RV Tethys II 20 campaigns to the DYFAMED site from July 2007 to May [IFREMER Centre de Brest] Journées 2009 des doctorants de l IFREMER Lars-Eric Heimbürger 1
2 DYCOMED Dynamics of chemical contaminants in the Mediterranean Sea: An integrated investigation from the atmosphere to the sea bed Sampling site Cap Ferrat atmospheric sampling site DYFAMED site sheltered from lateral coastal inputs by the Ligurian current ( ) Journées 2009 des doctorants de l IFREMER Lars-Eric Heimbürger 2
3 DYCOMED Dynamics of chemical contaminants in the Mediterranean Sea: An integrated investigation from the atmosphere to the sea bed Sampling plan TMs (Li, Al, V, Mn, Co, Ni, Fe, Cu, Zn, Ag, Cd, Hg, Pb) POPs (PCBs, PAHs, PBDEs) Organo-metals (MeHg, TBT) Biomarkers (alkenones, fatty acids, sterols) Black carbon DIC, DOC Nutrients Journées 2009 des doctorants de l IFREMER Lars-Eric Heimbürger 3
4 DYCOMED Dynamics of chemical contaminants in the Mediterranean Sea: An integrated investigation from the atmosphere to the sea bed Summary of sampling strategy Atmosphere dry and wet deposition: TM + Hg + Aerosol: TM + POP + BC Jan 2006 Mai archive since 1986 Water column TM + Hg (nf + f) Jul 2007 Mai m (12 depths) Suspended particulate matter TM + Hg + POP Jul 2007 Nov m Sediment traps TM + Hg + POP Mar 2007 Nov m Sediment core TM + Hg + POP available 45cm-core Journées 2009 des doctorants de l IFREMER Lars-Eric Heimbürger 4
5 Submitted to Marine Chemistry Quantification of trace metal enrichments of Ligurian surface waters by atmospheric deposition Lars-Eric HEIMBÜRGER 1, 2, Christophe MIGON 2 and Daniel COSSA 1 LC with flow of 37.8 x m 3 year -1 V of the LC m 3 t R = V/LC -> equals 102 days Δc = [F TM * t R ] / ML Δc/c ratio between total seawater labile atmospheric deposition during 102 days (Δ c) and dissolved concentrations in Ligurian surface waters (c) illustrates the impact of atmospheric deposition on surface seawater Journées 2009 des doctorants de l IFREMER Lars-Eric Heimbürger 5
6 Submitted to Science of the Total Environment Trace metal concentrations in the North-western Mediterranean atmospheric aerosol between 1986 and 2008: Seasonal patterns and decadal trends Lars-Eric HEIMBÜRGER 1, 2, Christophe MIGON 2, Aurélie DUFOUR 2, Jean-Francois CHIFFOLEAU 3 and Daniel COSSA 1 Saharan dust input Autumn/winter Journées 2009 des doctorants de l IFREMER Lars-Eric Heimbürger 6
7 In preparation Poster on GOLDSCHMIDT 2008, Vancouver Poster on ASLO Aquatic Sciences Meeting 2009, Nice Seasonal variations of trace elements in the water column of the Ligurian Sea, North-western Mediterranean Lars-Eric HEIMBÜRGER 1, 2, Jean-Francois CHIFFOLEAU 3, Daniel COSSA 1,Christophe MIGON 2, Aurélie DUFOUR 2, Dominique AUGER 3 and Emmanuelle ROZOUEL 3 Scavenged-like Scavenged-like, but shifting towards nutrient-like Nutrient-like Highly stratified water column over sampling time with only little winter mixing Journées 2009 des doctorants de l IFREMER Lars-Eric Heimbürger 7
8 Seasonal variations of trace elements in the water column of the Ligurian Sea, North-western Mediterranean Impact of exceptional wet TM deposition inputs in winter 2009? Elevated concentrations for Co, Cu and Zn Lower concentrations for nutrients and Ni 1000 annual precipitation at Cap Ferrat [mm] 2007: very dry year 2008: very high precipitation rates in winter Journées 2009 des doctorants de l IFREMER Lars-Eric Heimbürger 8
9 In preparation Poster on 9th Intern. Conf. on Mercury as a Global Contaminant, Guiyang, China Seasonality of methyl mercury distributions in relation with biological activity in an oceanic water column of the North-western Mediterranean Lars-Eric Heimbürger 1,2, Daniel Cossa 1, Christophe Migon 2, Jean-Claude Marty 2, Bernard Averty 3 and Aurélie Dufour 2 Methyl mercury (MeHg) Toxic Hg species Formed in situ in the water column Accumulating in the marine food web Top predators (tuna) highly contaminated very low picomolar level in sea water (0.3 ± 0.17 pmol L -1, n = 214) Journées 2009 des doctorants de l IFREMER Lars-Eric Heimbürger 9
10 Perspectives Acquired data with ongoing exploitation Wet and dry deposition of TM on Cap Ferrat POPs (PCBs, PBDEs and PAH) in aerosols (project EXTREMA) Hg in atmosphere (project EXTREMA) POPs (PCBs, PBDEs and PAHs) in sediment traps POPs (PCBs, PBDEs and PAH) in SPM (in situ pumps) TMs and Hg in SPM (in situ pumps) Hg in SPM (in situ pumps) TMs and Hg in sediment core Forecasted outcome in terms of publications: Persistent organic contaminants (PCBs, PAHs, PBDEs) in sediment traps, on suspended particulate matter and sediment Extreme input events such as (heavy rain, Saharan dust): marine response (atmosphere vs. surface seawater) POPs, TMs and black carbon (BC) in aerosols at Cap Ferrat: a 3 month survey Anthropogenic part of atmospherically-transported iron in the Ligurian region Journées 2009 des doctorants de l IFREMER Lars-Eric Heimbürger 10
11 DYCOMED Dynamics of chemical contaminants in the Mediterranean Sea: An integrated investigation from the atmosphere to the sea bed Merci! Globicephala macrorhynchus - Short-finned pilot whale 11 Journées 2009 des doctorants de l IFREMER Lars-Eric Heimbürger 11
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