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Content archived on 2024-04-30

Investigation and modeling of the physical characteristics and properties of snow at the surface of polar ice sheets

Objective


To develop and validate a numerical model of the physical characteristics of polar snow which can affect the exchange of energy and mass between the atmosphere and ice of the ice sheets.


An existing model (CROCUS), initially set up for temperate mountain snow, will be modified and adapted for
polar climate conditions. Formulations for fresh snow characteristics, densification, metamorphism, crusting,
and thermodynamics will be revised on the basis of existing observations, new field data and remote sensing.
The model is driven by surface meteorology.
The project takes advantage of scheduled British, French and Spanish field campaigns in both Greenland and
Antarctica to acquire new snow (temperature, density, stratigraphy, grain size and shape...) and atmospheric
(temperature, wind, precipitation, radiation, heat exchange...) observations which, along with archived data,
will provide ground truth at a few test sites and along traverses. Snow temperature, stratigraphy, grainsize,
surface roughness will also be validated using visible and microwave satellite data.
Eventually, a full scale 'climatology' of snow structure over Greenland and Antarctica will be obtained using
the European Center for Medium range Weather Forecasts archive as a full coverage meteorological input to
the snow model. Coupling with a general circulation model will also be done to assess the predictive capabilities
of the snow model.

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Call for proposal

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Coordinator

CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE
EU contribution
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Address
Rue Molière 54, Université de Grenoble 1
38402 SAINT-MARTIN-D'HERES
France

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Total cost
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Participants (3)