Description: Das Projekt "European Study of Carbon in the Ocean, Biosphere and Atmosphere: ocean section" wird vom Umweltbundesamt gefördert und von Max-Planck-Institut für Meteorologie durchgeführt. Objective: The long-term goal of ESCOBA is to investigate, quantify, model and eventually predict the behaviour of the global carbon cycle in response to the perturbation by man and with respect to its interaction with the physical climate system on time scales of up to several hundred years. The specific objectives of ESCOBA-ocean are to better understand the oceanic processes affecting the observed north-south atmospheric concentration gradient and to assess the impact of the seasonal cycle on the uptake of CO2 by the ocean. Both a modelling approach and an experimental approach will be used. General Information: This will be achieved by further collection of data, detailed model validation, sensitivity studies, incorporation of processes that appear likely to be important regarding oceanic CO2 uptake and transport neglected in previous studies, and simplification of complex 1-D biogeochemical models and their parameter fields. In particular, the role of DOC (dissolved organic carbon) in the carbon cycle will be studied, to better understand the export production partition into particulate and dissolved organic matter (DOM), the time scales of DOM decay and the Redfield ratio of DOM. Based on time series measurements at a fixed station in the oligotrophic North Atlantic (ESTOC station) the magnitude and decay characteristics of the DOM (dissolved organic matter) pulse that is expected to be associated with the spring bloom will be established and the seasonal evolution of the Redfield ratio in isolates of DOM will be analyzed. Satellite measurements will be used to study the world ocean productivity to assess the world ocean primary production (and the carbon fixation) in conjunction with a light-photosynthesis model as well as the temporal evolution (month-by-month) and interhemispheric difference in oceanic carbon fixation and circulation within the phytoplankton compartment. The resulting carbon fixation values will be combined with the pCO2 evolution as measured at sea via diagnostic and prognostic approaches. An experimental part of this project aims at the direct determination of the seasonal cycle and yearly average of the air-sea CO2 flux in two oceanic regions, the Indian ocean and the tropical Pacific ocean. The data will provide boundary conditions on these ocean basins to the atmospheric transport model intended at interpreting the north-south concentration gradient. In situ measurements will be carried out by ships and automated drifting buoys (CARIOCA). Satellite measurements of wind speed, sea surface temperature and ocean colour will be used to deduce the air-sea CO2 flux at regional scale to improve the computing of CO2 uptake in the models. Furthermore, the links between the transfer velocity and physical, chemical and biological parameters at the ocean surface will be investigated by direct ... Prime Contractor: Universite Pierre et Marie Curie, Pari VI, Laboratoire d Oceanographie Dynamique et de Climatologie; Paris; France.
Types:
SupportProgram
Origin: /Bund/UBA/UFORDAT
Tags: Atmosphärische CO2-Konzentration ? Windgeschwindigkeit ? Messstation ? Meerestemperatur ? Paris ? Biopharmazeutikum ? Außenhandel ? Klimatologie ? Kohlenstoff ? Langzeitwirkung ? Meteorologie ? Phosphor ? Phytoplankton ? Satellitenbild ? Stickstoff ? Temperaturverteilung ? Tracer ? Frankreich ? Kohlendioxid ? Kohlenstoffbilanz ? Messprogramm ? Messtechnik ? Oligotrophie ? Photosynthese ? Satellit ? Organisches Material ? Verfahrensparameter ? Zeitreihenanalyse ? Prognosedaten ? Gelöster organischer Kohlenstoff ? Ozeanzirkulation ? Modellierung ? Atmosphärenmodell ? In-Situ-Messung ? Blühzeitraum ? Chemikalien ? Daten ? Kohlenstoffkreislauf ? Zeitreihe ? Meeresgewässer ? Evolution ? Quantitative Analyse ? Verkehrsmodell ? Erdgeschichte ? Meeresoberfläche ? Nordatlantik ? Messdaten ? Schiff ? Jahreszeit ? Studie ? Kausalzusammenhang ? Produktivität ? in situ ? Globale Aspekte ? Stofftransport ? Partikel ? Physikalischer Vorgang ? Anthropogener Einfluss ? Atlantischer Ozean ? Biosphäre ? Indischer Ozean ? Kenngröße ? Pazifischer Ozean ? Datenerhebung ? Atmosphäre ? Klimasystem ? Geomorphologie ? Zirkulation ? Grenzwert ? Zerfallsprozess ? Untersuchungsprogramm ?
Region: Hamburg
Bounding box: 9.99302° .. 9.99302° x 53.55073° .. 53.55073°
License: cc-by-nc-nd/4.0
Language: Deutsch
Time ranges: 1996-02-01 - 1999-01-31
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