Objectif
Quantification of fluxes across the ocean margins is a
fundamental requirement for the evaluation of the carbon
budget and exchange of nutrients and associated trace elements between the continents, the coastal zone, and the open ocean.
Ocean Margin Exchange (OMEX) is designed to study the
exchanges and processes occurring at the European
continent/ocean margins in the North Atlantic. OMEX is a
process-oriented project composed of five subprojects:
Physics, Biological Processes, Biogeochemical Cycles, Benthic Processes - including Geology, Geochemistry and Biology-, and finally Carbon Cycling & Biogases.
The objectives of OMEX may be formulated in terms of the
following key questions:
1) What are the principal processes controlling fluxes of
water and particles in geomorphologically contrasting
slopes or shelf-edge systems?
2) Which part of the shelf primary production is sustained by oceanic nutrient fluxes versus river and atmospheric
inputs?
3) Is shelf production exported to the open ocean and are
shelf slopes depo-centres for the missing carbon?
4) What are the consequences of biologic discontinuities and of benthic-pelagic uncoupling at the shelf edge on the
carbon fluxes?
5) Is the diversity in the benthic community structure and production controlled by the balance between horizontal
and vertical fluxes?
6) How does the ocean margin exchange affect the behaviour of trace elements? How do the scavenging processes in
shelf edge systems control the reactivity and residence
time of trace metals and radionuclides?
7) What are the characteristics and types of biogases
produced on the shelf, exchanged with the atmosphere, or
exported to the open ocean?
8) What is the sensibility of the processes mentioned in the above questions in response to global climatic change and
sea-level rise?
The European coastal and continental margin setting provides a unique opportunity for investigating a wide diversity of ocean margin environments. During the first phase of the OMEX
project, the Goban Spur area in the Celtic Sea (characterized by a broad continental shelf where the circulation is
dominated by internal tides and waves) has been chosen as the principal study site. The Iberian margin (characterized by a very narrow continental shelf, a very steep continental slope, and a limited river water input where upwelling of deep ocean waters onto the shelf is coupled with offshore transport of
surface waters following northerly winds) has been selected as a secondary site for OMEX.
Champ scientifique
- natural sciencesearth and related environmental sciencesgeochemistry
- natural sciencesearth and related environmental sciencesatmospheric sciencesclimatologyclimatic changes
- natural sciencesearth and related environmental sciencesgeology
- natural scienceschemical sciencesnuclear chemistryradiation chemistry
Thème(s)
Appel à propositions
Data not availableRégime de financement
CSC - Cost-sharing contractsCoordinateur
1050 BRUXELLES
Belgique
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Participants (32)
24105 KIEL
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36208 VIGO
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33405 Talence
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92120 Montrouge
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91198 Gif-sur-Yvette
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24148 Kiel
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1049-001 LISBOA
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29280 Plouzane
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1296 Lisboa
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55020 MAINZ
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L43 7RA BIRKENHEAD
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PL1 3DH Plymouth
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GU8 5UB Godalming
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PE17 2LS Huntingdon
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2509 JG DEN HAAG ('S-GRAVENHAGE)
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1790 AB Texel, Den Burg
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ROSKILDE
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4401 EA YERSEKE
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PL1 2PB PLYMOUTH
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8000 FARO
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4000 LIEGE
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NORWICH
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20146 Hamburg
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9037 TROMSOE
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LL59 5EY GWYNEDD
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15071 La Coruña
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90 Galway
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CB2 3EQ Cambridge
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61 Limerick
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SO14 3ZH Southampton
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28359 Bremen
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1050 Bruxelles
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