Silicon cycling in the world ocean: the controls for opal preservation in the sediment as derived from observations and modelling

Información del proyecto

Identificador del acuerdo de subvención: MAS3970141

Proyecto cerrado

Fecha de inicio 1 Abril 1998

Fecha de finalización 30 Septiembre 2001

Financiado con arreglo a

• Specific programme of research and technological development in the field of marine science and technology, 1994-1998

Coste total

Sin datos

Aportación de la UE

Sin datos

Coordinado por

MAX-PLANCK-GESELLSCHAFT ZUR FOERDERUNG DER WISSENSCHAFTEN E.V.
Germany

Objetivo

The main objectives of the project are:
I) To provide a data base of observations and a general circulation model which allow comprehensive studies of the silicon cycling in the oceans;
II) To reproduce the first principles of silicon cycling in today's world ocean by use of an ocean general circulation model;
III) To offer an explanation for the present opaline sedimentary distribution;
IV) To test our improved understanding of opal by a paleoceanographic application of the model and compare the simulations with the observed sediment record.

In order to enable full use of the paleoclimatic information of the opal sediment record we propose as scientifically innovative steps to: - gather all existing observed Si and opal data for the present ocean including flux rates and summarize them in a combined data set which allows systematic statistical and analytical evaluation (task 1- data base), - present a first coupled three-dimensional ocean-sediment model including opal and early diagenesis processes on the basis of an ocean general circulation model velocity field which allows realistic regional resolution of large scale oceanic tracer fields (task 2 - model reference run), - use both tools to systematically diagnose model deficiencies (task 3 - comparison) and try to remove disagreements between model and observations for the present ocean by development of new parametrisations for marine Si cycling, in particular for opal dissolution under various conditions (task 4- optimisation), - apply the optimal model version to ocean velocity fields which represent the Last Glacial Maximum and the mid-Miocene (open/closed Central America isthmus) (task 5 - validation).The project is based on a close collaboration of experimental and modelling scientists. It will provide the scientific community with operationally working tools for the use of biogenic silica in paleoceanographic investigations. 06

Ámbito científico (EuroSciVoc)

• ciencias naturales › ciencias químicas › química inorgánica › metaloides

Programa(s)

• FP4-MAST 3 - Specific programme of research and technological development in the field of marine science and technology, 1994-1998

Tema(s)

• 010106 - Marine biodiversity issues (genetic, population, species & habitat) as a basis for understanding ecosystem structure, dynamics and resilience in the context of sustainable exploitation, biological conservation and marine habitat restoration

Convocatoria de propuestas

Datos no disponibles

Régimen de financiación

CSC - Cost-sharing contracts

Coordinador

MAX-PLANCK-GESELLSCHAFT ZUR FOERDERUNG DER WISSENSCHAFTEN E.V.

• Aportación de la UE: Sin datos
• Dirección: Bundesstra¯e 55 ; 20146 HAMBURG ; Alemania
• Coste total: Sin datos

Participantes (1)

Université de Bretagne Occidentale

Francia

• Aportación de la UE: Sin datos
• Dirección: 6,Avenue le Gorgeu ; 29285 Brest
• Coste total: Sin datos