OMEX II-I Final Report  | 
  
The synthesis of OMEX I data have been written up into an internal Final Report that was submitted to the EC. The separate papers within this report are restricted to OMEX II-I project scientists and the officers of the European Commission. The titles of the papers contained in the report are given here for information only, listed by sub-project. Please feel free to contact the primary authors of the papers for further information. Many details contained in the report will be published in peer reviewed journals.  | 
  
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     Executive summary of
    scientific achievements Physical structures,
    advection and mixing at Goban Spur Ocean-shelf
    circulation, exchange and distributions The pattern of
    cross-slope depositional fluxes Slope current
    dynamics and variability west of Ireland. PANORAMA: a
    semi-automated AVHRR and CZCS system for observing coastal and ocean processes.  SST-nitrate
    relationships in the Celtic Sea for remote sensing of new production. OMEX hydrographic and
    nutrient Atlas. The impact of the
    ambient density field on variability in the non-linear internal wave field on the Iberian
    shelf. Extension of the
    Ocean Circulation Model investigating how slope currents at the eastern ocean margin
    interact with ocean circulation. Prognostic numerical
    model applications.  | 
  
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     Executive summary of scientific achievements. Pelagic production at the Celtic Sea shelf break. Early spring bloom phytoplankton-nutrient dynamics at the
    Celtic Sea shelf break. Summertime phytoplankton production and nutrient
    transformations at the Celtic Sea shelf break. Nitrogen, chlorophyll and oxygen in biogeochemical
    processes related to primary production at the Goban Spur, Celtic Sea. Improved estimation of the f-ratio in natural phytoplankton
    assemblages. Phytoplankton pigment chemotaxonomy at the Northeast
    Atlantic ocean margin. Microzooplankton community structure at the Goban Spur,
    Celtic Sea. Microzooplankton herbivory across the shelf-break at the
    Goban Spur, Celtic Sea.  Determinations of dissolved organic carbon and nitrogen
    fluxes across the Goban Spur using a novel high temperature catalytic oxidation technique.
     pCO2 - d13CPOC
    relationships in surface waters of the Gulf of Biscay. Distribution and fluxes of calcium carbonate along
    continental margin in the Gulf of Biscay. Process influencing metal distributions and concentrations
    (Cd, Cu, Mn, Ni, Pb, Zn) at the Northwest European shelf break. Trace elements in the European shelf waters: the cases of
    the Celtic margin and the Portuguese coast.  | 
  
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| Biological
    Processes Executive summary of scientific achievements. Particle flux across the mid-European continental margin. Seasonality in the surface abundance and flux of algal
    pigments at the continental slope determined by HPLC analyses. Close coupling between the surface biological communities
    and their vertical and lateral flux at the continental slope at 49N. Seasonal and long-term patterns of mesozooplankton biomass
    in the Celtic Sea, derived from CPR data. Seasonal and vertical distributions of mesozooplankton
    biomass at the continental shelf edge in the Celtic Sea, as measured by the
    Longhurst-Hardy Plankton Recorder and the Continuous Plankton Recorder. Mixing characteristics of the water column in the Goban
    Spur shelf break area - an attempt to describe the temperature evolution by
    turbulence-closure modelling. Parameterisation of a numerical model containing one and
    two microplankton compartments for the Goban Spur region. A depth resolving numerical model of physically forced
    microbiology at the European shelf edge. Numerical modelling at the shelf break: integrating field
    measurements of chlorophyll, primary production, zooplankton, nitrate, ammonium, oxygen
    and sediment properties. Modelling the benthic trophic network. Assessing organic matter mineralisation, degradability and
    mixing rate in an ocean margin sediment (Northeast Atlantic) by diagenetic modelling.  The sea-floor as the ultimate sediment trap - using
    sediment properties to constrain benthic-pelagic exchange processes at the Goban Spur. Conditions at the shelf break off the north Norwegian coast
    (6920'N - 7030'N). Sensitivity studies of circulation and ocean-shelf exchange
    off northern Norway. Small time and spatial scale variability of phytoplankton
    biomass on the north Norwegian shelf in 1995. Abundance and biomass of pico-, nano- and microplankton
    along a transect across Norvestbank, north Norwegian shelf. Seasonal patterns in composition and biomass of autotrophic
    and heterotrophic nano- and microzooplankton communities on the north Norwegian shelf.  Zooplankton biomass distribution and plankton transport at
    Nordvestbanken and Malangsdjupet in 1994. Physical and biological factors influencing the seasonal
    variation in distribution of zooplankton across the shelf at Nordvestbank, northern
    Norway.  Seasonal variation of vertical flux of phytoplankton and
    biogenic matter at Norvestbank, north Norwegian shelf in 1994. Seasonal variation of nutrients and suspended biomass along
    a transect across the Norvestbank, north Norwegian shelf in 1994. Suspended and sedimented faecal pellets along a transect
    across and at the shelf break of Nordvestbank, north Norwegian shelf. Macrozooplankton faecal pellet contribution to carbon flux
    at a northern Norwegian shelf break. Hydrography and plankton interactions: attempts to
    calculate fluxes by use of a dynamic 3-D model concept with observational data in a highly
    advective environment.  | 
  
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| Benthic Processes Executive summary of
    scientific achievements. Suspended sediment
    distribution along the shelf edge and slope of Northwest Europe. 210Pb in
    sediments on the continental shelf edge, slope and rise of the eastern North Atlantic.. Late glacial to
    recent accumulation fluxes of sediments at the shelf edge and slope of Glacial-interglacial
    switching of organic carbon sources supplying the slope of Northwest Europe, 48 - 50N. Analysis of
    sedimentary carbon and nitrogen along the north-west European continental margin:
    intercomparative analysis by OMEX laboratory.  Spatial and temporal
    variability of particulate matter in the benthic boundary layer at the north east Atlantic
    continental margin (Celtic Sea, Goban Spur). Benthic
    denitrification and nitrogen cycling along the slope and rise of the Celtic Margin. Release of dissolved
    organic carbon from Celtic Margin sediments and its significance for benthic carbon
    cycling. Factors governing
    abundance of hydrolyzable amino acids in the sediments from the Goban spur transect. Patterns of benthic
    faunae and benthic respiration on the Celtic continental margin in relation to the
    distribution of phytodetritus.  Late-summer mass
    deposition of gelatinous phytodetritus along the continental slope of Southwest Ireland. Small benthic size
    classes along the western European continental margin: spatial and temporal variability in
    activity and biomass.  Meiofauna: macrofauna
    ratios along the continental slope of the Goban Spur (NE Atlantic) in relation to food
    availability. Feeding types of the
    benthic community and particle transport across the continental slope of the Goban Spur. Benthic-pelagic
    coupling: the role of the benthic biota in the exchange processes through the benthic
    boundary layer of the Goban Spur area.  Is the continental
    shelf off Tagus acting as a sediment trap? Geoqumica dos
    aminocidos hidrolizveis em sedimentos da margem este do Atlntico norte. Matria em
    suspenso: do esturio do Tejo para a plataforma continental adjacente  | 
  
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| Carbon
    Cycling and Biogases Executive summary of scientific achievements. Fluxes of
    especially carbon dioxide in the marine atmospheric surface layer Fluxes in the marine
    atmospheric surface layer: CO2, momentum, heat and vapour; aerosols and
    bubbles. Overview of the data from
    RIS/TNO instrument packages. Inorganic d13C
    and methane in European margin waters. The distribution of dissolved
    dimethylsulphide at the European continental margin.  Dimethylsulphide emission
    rates from European continental margins and shelves.  | 
  
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