Objective To understand the main aspects of the mechanisms involved in thepresent-day transfer of some atmospheric constituents from sourceregions to the surface snow in Central Greenland.The specific tasks are 1) to identify sources, source regions andtransport pathways of chemical species to the site, 2) to studysome of the main factors (both physical and chemical) that areresponsible for atmospheric modifications of the chemicalsignatures of sources during transport, 3) to investigate therelationship between the atmospheric phase and the chemicalcomposition of snow deposited at the surface, including studieson local vertical transport and incorporation into precipitation,and 4) to quantify mechanisms responsible for post-depositionmodifications of the chemical profiles in the upper layers of thefirn, for reversibly and irreversibly deposited chemical species.All of this information will be used by some of the proposers inthe interpretation, in terms of past atmospheric conditions, ofthe proxy-records retrieved with the palaeo-ice core data fromthe GRIP core.The project will build on field work, laboratory experiments andcomputer modeling. The field aspect will take place at theSummit of the Greenland Ice Sheet, at the location of thedrilling of the deep ice cores from the GRIP and GISP-2 programs.It will benefit from preliminary efforts at the same site, thatwere aiming at similar goals.The project will be a collaborative effort with americanresearchers, promoting complementarity in the research. The twoprograms will share the logistical aspects of the field seasons.The duration of the project will allow for access at the site inspring/summer of 1994, 1995 and 1996.Field work will include atmospheric sampling of aerosol, gasesand precipitation, and simultaneous surface and near surface snowsampling. Part of the effort will include development ofyear-round automatic aerosol and gas samplers. The project willfocus on the most appropriate chemical species for each specifictasks mentioned above, with the overall transfer also followedfor some elements of major importance in the biogeochemicalcycles in the atmosphere (S, C, N). Laboratory work is intendedfor studying more specifically the incorporation of some speciesin the snow at the process level, and for deriving coefficientsto be used in parametrizations of the exchange processes.A preliminary effort for modelling atmospheric transport to thesite is included in the program, as well as tentative modellingof post deposition processes in relation with firncharacteristics. Programme(s) FP3-ENV 1C - Specific research and technological development programme (EEC) in the field of the environment, 1990-1994 Topic(s) 0101 - Natural climate change Call for proposal Data not available Funding Scheme CSC - Cost-sharing contracts Coordinator CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE Address Rue molière 54, université de grenoble 1 38402 Saint-martin-d'heres France See on map EU contribution € 0,00 Participants (7) Sort alphabetically Sort by EU Contribution Expand all Collapse all FINNISH METEOROLOGICAL INSTITUTE Finland EU contribution € 0,00 Address 20 e,sahaajankatu 20 e 00810 Helsinki See on map National Environmental Research Institute - Ministry of Environment and Energy Denmark EU contribution € 0,00 Address 399,frederiksborgvej 399 4000 Roskilde See on map RUPRECHT-KARLS-UNIVERSITAET HEIDELBERG Germany EU contribution € 0,00 Address Im neuenheimer feld 229 69117 Heidelberg See on map UNIVERSITY OF BERNE Switzerland EU contribution € 0,00 Address 5,sidlerstrasse 5 3012 Bern See on map Universiteit Gent Belgium EU contribution € 0,00 Address 86,proeftuinstraat 86 9000 Gent See on map Université de Paris XII (Paris-Val de Marne) France EU contribution € 0,00 Address 61 avenue du général de gaule 94010 Créteil See on map Université de Savoie France EU contribution € 0,00 Address 7 le bourget du lac 73376 Le bourget-du-lac See on map