Objetivo To estimate the absorption by the ocean of the anthropogeniccarbon dioxyde. The first phase deals with the quantization ofthe seasonal variation of oceanic sources and sinks at regionalscale. This is a companion study with part A : atmosphere andpart B : biosphere.An experimental and a modelling approach are used to study theexchange of CO2 between the ocean and the atmosphere, and thenatural carbon cycle in the ocean.The CO2 flux exchangedbetween ocean and atmosphere is most commonly derived from thecombination of the transfer velocity and of the air-sea gradientof the CO2 partial pressure. The transfer velocity can bededuced from the surface wind speed through a parametrization,relating the wind speed to the turbulent exchange at theair-sea interface. Experiments at sea arecarried out to improve this parametrization. Also,the wind speed remotely sensed from satellite by microwaveinstruments (radars and radiometers) is used to monitor thetransfer velocity on the global ocean.The air-sea CO2 partialpressure, which can only be measured in--situ, is monitored atseasonal scale using ships of opportunity along a commercial linein the north atlantic ocean and in the tropical pacific ocean andalso in the indian ocean. We intend to use satellitemeasurements (ocean colour and SST) to help extrapolating thesemeasurements. In a near future automated buoys should complementthis monitoring. In addition, improved techniques to measure theDissolved Organic Carbon (DOC) are used on oceanographic cruises.The knowledge of DOC composition and lifetime is of importancefor modelling the oceanic carbon cycle.In parallel an important effort is done in modelling the naturalcarbon cycle in the ocean. Process studies are carried out withone dimensional models used in specific places, and descriptionsof the processes in the carbon cycle are implemented in twodifferent ocean global circulation models. One, in which therepresentation of the biological processes is being improved,will be used on the global scale. The other one is used atregional scale (tropical atlantic ocean), the description of theocean circulation being tested at global scale. Finally,assimilation techniques to constrain the models by measurements(in particular of chlorophyll) are under development. Ámbito científico engineering and technologymaterials engineeringcolorsengineering and technologymechanical engineeringvehicle engineeringaerospace engineeringsatellite technologynatural sciencesearth and related environmental sciencesatmospheric sciencesmeteorologybiospheraengineering and technologyelectrical engineering, electronic engineering, information engineeringinformation engineeringtelecommunicationsradio technologyradar Programa(s) FP3-ENV 1C - Specific research and technological development programme (EEC) in the field of the environment, 1990-1994 Tema(s) 0102 - Anthropogenic climate change Convocatoria de propuestas Data not available Régimen de financiación CSC - Cost-sharing contracts Coordinador UNIVERSITE PIERRE ET MARIE CURIE - PARIS VI Aportación de la UE Sin datos Dirección Place Jussieu 4 75252 PARIS Francia Ver en el mapa Coste total Sin datos Participantes (5) Ordenar alfabéticamente Ordenar por aportación de la UE Ampliar todo Contraer todo Centre National de la Recherche Scientifique Francia Aportación de la UE Sin datos Dirección 14 avenue Edouard Belin 31400 Toulouse Ver en el mapa Coste total Sin datos Centre National de la Recherche Scientifique (CNRS) Francia Aportación de la UE Sin datos Dirección Avenue de la Terrasse 91198 Gif-sur-Yvette Ver en el mapa Coste total Sin datos MAX-PLANCK-GESELLSCHAFT ZUR FOERDERUNG DER WISSENSCHAFTEN E.V. Alemania Aportación de la UE Sin datos Dirección Bundesstra¯e 55 20146 HAMBURG Ver en el mapa Coste total Sin datos NERC Centre of Coastal and Marine Sciences Reino Unido Aportación de la UE Sin datos Dirección Prospect Place West Hoe PL1 3DH Plymouth Ver en el mapa Coste total Sin datos UNIVERSITY OF EAST ANGLIA Reino Unido Aportación de la UE Sin datos Dirección University Plain NORWICH Ver en el mapa Enlaces Sitio web Opens in new window Coste total Sin datos
