International Snow Science Workshop Proceedings - Montana State University Library

Item: Data Assimilation of Multilayer Snowpack on Argentière Glacier, Using X-band SAR Data, DMRT and a Detailed Snowpack Model

• • Title: Data Assimilation of Multilayer Snowpack on Argentière Glacier, Using X-band SAR Data, DMRT and a Detailed Snowpack Model

    Proceedings: International Snow Science Workshop Grenoble – Chamonix Mont-Blanc - October 07-11, 2013

    Authors:

    • Xuan-Vu Phan  [ Grenoble Image Parole Signal et Automatique lab, Grenoble, France ]
    • Laurent Ferro-Famil  [ Institut d’Electronique et de Télécommunications de Rennes, University of Rennes 1, France ]
    • Michel Gay  [ Grenoble Image Parole Signal et Automatique lab, Grenoble, France ]
    • Yves Durand  [ Météo-France - CNRS, CNRM-GAME, UMR3589, Centre d’Etudes de la Neige, Grenoble, France ]
    • Marie Dumont  [ Météo-France - CNRS, CNRM-GAME, UMR3589, Centre d’Etudes de la Neige, Grenoble, France ]
    • Samuel Morin  [ Météo-France - CNRS, CNRM-GAME, UMR3589, Centre d’Etudes de la Neige, Grenoble, France ]
    • Guy d’Urso  [ Electricité de France, Paris, France ]

    Date: 2013-10-07

    Abstract: This study discuss the potential of using remote sensing data from Synthetic Aperture Radar (SAR), couple with Dense Media Radiative Transfer (DMRT) model, to constrain the snowpack's optical grain size and density calculated by the detailed snowpack model Crocus. A snowpack Electromagnetic Backscattering Model (EBM) based on DMRT compatible with X-band and Ku-band frequencies is developed from the previous one by Longépé et al., 2009. From measured or simulated snowpack stratigraphic profiles consisting of snow optical grain size, density, the model calculates the backscattering coefficient σ0 for co-polarized channels (HH and VV). Next, from the EBM, the adjoint operator is developed and used in a variational assimilation scheme in order to minimize the discrepancies between simulations and SAR image data observations. A time series of TerraSAR-X acquisitions on Argentière glacier (Chamonix Mont Blanc, France) is used to test the proposed scheme.

    Object ID: ISSW13_paper_P2-14.pdf

    Language of Article: English

    Presenter(s): Unknown

    Keywords: remote sensing, electromagnetic backscattering model, snow grain optical diameter, snow density, radar (SAR), data assimilation

    Page Number(s): 997-1003

    Subjects: snow density remote sensing snowpack modeling

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