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author = "Talagrand O."
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Found 13 documents, displaying page 1 of 2

Controlling instabilities along a 3DVar analysis cycle by assimilating in the unstable subspace: a comparison with the EnKF

Author(s) : Carrassi A. , Trevisan A. , Descamps L. , Talagrand O. , Uboldi F.
Description : A hybrid scheme obtained by combining 3DVar with the Assimilation in the Unstable Subspace (3DVar-AUS) is tested in a QG model, under perfect model conditions, with a fixed observational network, with and without observational noise. The AUS scheme, originally formulated to assimilate adaptive obser...
Repository : National Research Council Bologna - ISAC Repository
Language(s) : English

Emission rate and chemical state estimation by 4-dimensional variational inversion

Author(s) : Elbern, H. , Strunk, A. , Schmidt, H. , Talagrand, O.
Description : This study aims to assess the potential and limits of an advanced inversion method to estimate pollutant precursor sources mainly from observations. Ozone, sulphur dioxide, and partly nitrogen oxides observations are taken to infer source strength estimates. As methodology, the four–dimensional vari...
Repository : HAL - Hyper Article on Line
Language(s) : English

Emission rate and chemical state estimation by 4-dimensional variational inversion

Author(s) : Elbern, H. , Strunk, A. , Schmidt, H. , Talagrand, O.
Description : This study aims to assess the potential and limits of an advanced inversion method to estimate pollutant precursor sources mainly from observations. Ozone, sulphur dioxide, and partly nitrogen oxides observations are taken to infer source strength estimates. As methodology, the four-dimensional vari...
Repository : HAL - Hyper Article on Line
Language(s) : English

Controlling instabilities along a 3DVar analysis cycle by assimilating in the unstable subspace: a comparison with the EnKF

Author(s) : Carrassi, A. , Trevisan, A. , Descamps, L. , Talagrand, O. , Uboldi, F.
Description : A hybrid scheme obtained by combining 3DVar with the Assimilation in the Unstable Subspace (3DVar-AUS) is tested in a QG model, under perfect model conditions, with a fixed observational network, with and without observational noise. The AUS scheme, originally formulated to assimilate adaptive obs...
Repository : arXiv
Language(s) : Undetermined

Recent advances in the development of a European Mars climate model in Oxford

Author(s) : Read, P.L. , Lewis, S.R. , Newman, C.E. , Bottger, H. , Forget, F. , Hourdin, F. , Talagrand, O.
Description : Since the early 1990s, efforts have been under way in Oxford to develop a range of numerical weather and climate prediction models for various studies of the Martian atmosphere and near-surface environment. Early versions of the Oxford model were more in the way of 'process models', aimed at relativ...
Repository : Open Research Online
Language(s) : Undetermined

Improved general circulation models of the Martian atmosphere from the surface to above 80 km

Author(s) : Forget, F , Hourdin, F , Fournier, R , Hourdin, C , Talagrand, O
Description :
Repository : Oxford University Research Archive (ORA)
Language(s) : Undetermined

A climate database for Mars

Author(s) : Lewis, SR , Collins, M , Read, PL , Forget, F , Hourdin, F , Fournier, R
Description :
Repository : Oxford University Research Archive (ORA)
Language(s) : Undetermined

A GCM climate database for Mars: For mission planning and for scientific studies

Author(s) : Read, PL , Collins, M , Forget, F , Fournier, R , Hourdin, F , Lewis, SR
Description :
Repository : Oxford University Research Archive (ORA)
Language(s) : Undetermined

The Mars Climate Database

Author(s) : Bingham, S.J. , Lewis, S.R. , Read, P.L. , Forget, F. , Hourdin, F. , Talagrand, O. , Wanherdrick, Y. , Angelats i Coll, M.
Description : The Mars Climate Database (MCD) [1] is a database of statistics describing the climate and environment of the Martian atmosphere. It was constructed directly on the basis of output from mulitannual integrations of two general circulation models (GCMs)developed by Laboratoire de Météorologie Dynami...
Repository : Open Research Online
Language(s) : Undetermined

EMCS: The Exomars Climate Sounder (EMCS) investigation

Author(s) : Schofield, J. T. , Kass, D. M. , Kleinböhl, A. , McCleese, D. J. , Allen, M. A. , Foote, M. C. , Jeganathan, M. , Forget, F.
Description : The ExoMars Climate Sounder (EMCS) investigation plans to map daily, global, pole-to-pole profiles of temperature, dust, water and CO2 ices, and water vapor from the proposed 2016 ExoMars Trace Gas Orbiter (EMTGO). The measurements cover all local times, adding a new dimension to data previously obt...
Repository : Open Research Online
Language(s) : Undetermined
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Found 13 documents, displaying page 1 of 2