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Organics over the Ocean Modifying Particles in both Hemispheres

Ziel

Considering its size and potential importance, the ocean is surprisingly poorly characterised in terms of organic gases that play important roles in global atmospheric chemistry. In this project we aim to characterise the nature of organic trace species, i n particular organic oxygenates, and the rate of emissions from marine biology. The oxidation of these compounds in air is directly linked to the global ozone budget while the oxidation pathways in seawater are largely unknown. We will conduct laboratory e xperiments on seawater samples and specific phytoplankton types to determine the effect of basic biophysical parameters (e.g. temperature, pH, plankton growth rate and physiological state) on the emission of organic species. The photooxidation rates and pr oducts of these species will be examined through measurements. Marine aerosols, with emphasis on the organic fraction, will also be investigated in terms of physical, chemical (mass closure), hygroscopic and optical properties. Two shipborne research cruis es will be performed to assess both emission and uptake in the open ocean, and contrast the pristine tropical Southern Hemispheric with the more strongly anthropogenically affected Northern Hemisphere. Based on the laboratory and field measurements an inte ractive atmosphere-ocean chemistry model will be developed, basic to global Earth system simulations.

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Aufforderung zur Vorschlagseinreichung

FP6-2004-GLOBAL-3
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Finanzierungsplan

STREP - Specific Targeted Research Project

Koordinator

MAX-PLANCK-GESELLSCHAFT ZUR FOERDERUNG DER WISSENSCHAFTEN E.V
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Letzte Aktualisierung: 15 Dezember 2009

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Permalink: https://cordis.europa.eu/project/id/18419/de

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