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There are 17071 results for: content related to: A hybrid approach to estimating error covariances in variational data assimilation

  1. Assimilation of cloud information from space-borne radar and lidar: experimental study using a 1D+4D-Var technique

    Quarterly Journal of the Royal Meteorological Society

    Volume 141, Issue 692, October 2015 Part A, Pages: 2708–2725, M. Janisková

    Version of Record online : 9 MAY 2015, DOI: 10.1002/qj.2558

  2. Incremental 4D-Var convergence study

    Tellus A

    Volume 59, Issue 5, October 2007, Pages: 706–718, YANNICK TRÉMOLET

    Version of Record online : 28 JUN 2008, DOI: 10.1111/j.1600-0870.2007.00271.x

  3. You have free access to this content
    A reduced and limited-memory preconditioned approach for the 4D-Var data-assimilation problem

    Quarterly Journal of the Royal Meteorological Society

    Volume 137, Issue 655, January 2011 Part B, Pages: 452–466, S. Gratton, P. Laloyaux, A. Sartenaer and J. Tshimanga

    Version of Record online : 28 FEB 2011, DOI: 10.1002/qj.743

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    Direct 4D-Var assimilation of all-sky radiances. Part I: Implementation

    Quarterly Journal of the Royal Meteorological Society

    Volume 136, Issue 652, October 2010 Part A, Pages: 1868–1885, Peter Bauer, Alan J. Geer, Philippe Lopez and Deborah Salmond

    Version of Record online : 12 OCT 2010, DOI: 10.1002/qj.659

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    Experimental 1D + 4D-Var assimilation of CloudSat observations

    Quarterly Journal of the Royal Meteorological Society

    Volume 138, Issue 666, July 2012 Part A, Pages: 1196–1220, M. Janisková, P. Lopez and P. Bauer

    Version of Record online : 21 DEC 2011, DOI: 10.1002/qj.988

  6. You have full text access to this OnlineOpen article
    Estimating interchannel observation-error correlations for IASI radiance data in the Met Office system

    Quarterly Journal of the Royal Meteorological Society

    Volume 140, Issue 681, April 2014 Part B, Pages: 1236–1244, L. M. Stewart, S. L. Dance, N. K. Nichols, J. R. Eyre and J. Cameron

    Version of Record online : 21 AUG 2013, DOI: 10.1002/qj.2211

  7. Computation of observation sensitivity and observation impact in incremental variational data assimilation

    Tellus A

    Volume 60, Issue 5, October 2008, Pages: 964–978, YANNICK TRÉMOLET

    Version of Record online : 15 AUG 2008, DOI: 10.1111/j.1600-0870.2008.00349.x

  8. A comparative study of 4D-VAR and a 4D Ensemble Kalman Filter: perfect model simulations with Lorenz-96

    Tellus A

    Volume 59, Issue 1, January 2007, Pages: 96–100, ELANA J. FERTIG, JOHN HARLIM and BRIAN R. HUNT

    Version of Record online : 29 NOV 2006, DOI: 10.1111/j.1600-0870.2006.00205.x

  9. Gaussian quadrature 4D-Var

    Quarterly Journal of the Royal Meteorological Society

    Volume 139, Issue 675, July 2013 Part B, Pages: 1462–1472, R. J. J. Stappers and J. Barkmeijer

    Version of Record online : 6 DEC 2012, DOI: 10.1002/qj.2056

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    Direct 4D-Var assimilation of all-sky radiances. Part II: Assessment

    Quarterly Journal of the Royal Meteorological Society

    Volume 136, Issue 652, October 2010 Part A, Pages: 1886–1905, Alan J. Geer, Peter Bauer and Philippe Lopez

    Version of Record online : 12 OCT 2010, DOI: 10.1002/qj.681

  11. B-preconditioned minimization algorithms for variational data assimilation with the dual formulation

    Quarterly Journal of the Royal Meteorological Society

    Volume 140, Issue 679, January 2014 Part B, Pages: 539–556, S. Gürol, A. T. Weaver, A. M. Moore, A. Piacentini, H. G. Arango and S. Gratton

    Version of Record online : 22 MAY 2013, DOI: 10.1002/qj.2150

  12. Determination of optimal nudging coefficients

    Tellus A

    Volume 55, Issue 1, January 2003, Pages: 1–15, P. A. VIDARD, F.-X. LE DIMET and A. PIACENTINI

    Version of Record online : 18 DEC 2002, DOI: 10.1034/j.1600-0870.2003.201317.x

  13. Derivative-free optimization for large-scale nonlinear data assimilation problems

    Quarterly Journal of the Royal Meteorological Society

    Volume 140, Issue 680, April 2014, Pages: 943–957, S. Gratton, P. Laloyaux and A. Sartenaer

    Version of Record online : 22 MAY 2013, DOI: 10.1002/qj.2169

  14. Comparison of retrospective optimal interpolation with four-dimensional variational assimilation

    Tellus A

    Volume 61, Issue 3, May 2009, Pages: 428–437, HYO-JONG SONG, GYU-HO LIM, DONG-IN LEE and HEE-SANG LEE

    Version of Record online : 12 FEB 2009, DOI: 10.1111/j.1600-0870.2009.00396.x

  15. Dynamical response of equatorial waves in four-dimensional variational data assimilation

    Tellus A

    Volume 56, Issue 1, January 2004, Pages: 29–46, NEDJELJKA ŽAGAR, NILS GUSTAFSSON and ERLAND KÄLLÉN

    Version of Record online : 6 JAN 2004, DOI: 10.1111/j.1600-0870.2004.00036.x

  16. Operational implementation of a hybrid ensemble/4D-Var global data assimilation system at the Met Office

    Quarterly Journal of the Royal Meteorological Society

    Volume 139, Issue 675, July 2013 Part B, Pages: 1445–1461, A. M. Clayton, A. C. Lorenc and D. M. Barker

    Version of Record online : 12 NOV 2012, DOI: 10.1002/qj.2054

  17. 4DEnVar: link with 4D state formulation of variational assimilation and different possible implementations

    Quarterly Journal of the Royal Meteorological Society

    Volume 140, Issue 684, October 2014 Part A, Pages: 2097–2110, Gérald Desroziers, Jean-Thomas Camino and Loïk Berre

    Version of Record online : 15 APR 2014, DOI: 10.1002/qj.2325

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    Reduced-order 4D-Var: A preconditioner for the Incremental 4D-Var data assimilation method

    Geophysical Research Letters

    Volume 33, Issue 18, September 2006, C. Robert, E. Blayo and J. Verron

    Version of Record online : 22 SEP 2006, DOI: 10.1029/2006GL026555

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    Parameter-field estimation for atmospheric dispersion: application to the Chernobyl accident using 4D-Var

    Quarterly Journal of the Royal Meteorological Society

    Volume 138, Issue 664, April 2012 Part A, Pages: 664–681, M. Bocquet

    Version of Record online : 23 NOV 2011, DOI: 10.1002/qj.961

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    Development of a four-dimensional variational coupled data assimilation system for enhanced analysis and prediction of seasonal to interannual climate variations

    Journal of Geophysical Research: Oceans (1978–2012)

    Volume 113, Issue C10, October 2008, Nozomi Sugiura, Toshiyuki Awaji, Shuhei Masuda, Takashi Mochizuki, Takahiro Toyoda, Toru Miyama, Hiromichi Igarashi and Yoichi Ishikawa

    Version of Record online : 22 OCT 2008, DOI: 10.1029/2008JC004741