@Article{npg-20-1031-2013,
AUTHOR = {Penny, S. G. and Kalnay, E. and Carton, J. A. and Hunt, B. R. and Ide, K. and Miyoshi, T. and Chepurin, G. A.},
TITLE = {The local ensemble transform Kalman filter and the running-in-place algorithm applied to a global ocean general circulation model},
JOURNAL = {Nonlinear Processes in Geophysics},
VOLUME = {20},
YEAR = {2013},
NUMBER = {6},
PAGES = {1031--1046},
URL = {https://npg.copernicus.org/articles/20/1031/2013/},
DOI = {10.5194/npg-20-1031-2013}
}

@Article{npg-20-1001-2013,
AUTHOR = {Ollinaho, P. and Bechtold, P. and Leutbecher, M. and Laine, M. and Solonen, A. and Haario, H. and J\"arvinen, H.},
TITLE = {Parameter variations in prediction skill optimization at ECMWF},
JOURNAL = {Nonlinear Processes in Geophysics},
VOLUME = {20},
YEAR = {2013},
NUMBER = {6},
PAGES = {1001--1010},
URL = {https://npg.copernicus.org/articles/20/1001/2013/},
DOI = {10.5194/npg-20-1001-2013}
}

@Article{npg-20-705-2013,
AUTHOR = {Gottwald, G. A. and Majda, A. J.},
TITLE = {A mechanism for catastrophic filter divergence in data assimilation for sparse observation networks},
JOURNAL = {Nonlinear Processes in Geophysics},
VOLUME = {20},
YEAR = {2013},
NUMBER = {5},
PAGES = {705--712},
URL = {https://npg.copernicus.org/articles/20/705/2013/},
DOI = {10.5194/npg-20-705-2013}
}

@Article{npg-20-621-2013,
AUTHOR = {Wei, M. and Jacobs, G. and Rowley, C. and Barron, C. N. and Hogan, P. and Spence, P. and Smedstad, O. M. and Martin, P. and Muscarella, P. and Coelho, E.},
TITLE = {The impact of initial spread calibration on the RELO ensemble and its application to Lagrangian dynamics},
JOURNAL = {Nonlinear Processes in Geophysics},
VOLUME = {20},
YEAR = {2013},
NUMBER = {5},
PAGES = {621--641},
URL = {https://npg.copernicus.org/articles/20/621/2013/},
DOI = {10.5194/npg-20-621-2013}
}

@Article{npg-21-633-2014,
AUTHOR = {Cuzol, A. and M\'emin, E.},
TITLE = {Monte Carlo fixed-lag smoothing in state-space models},
JOURNAL = {Nonlinear Processes in Geophysics},
VOLUME = {21},
YEAR = {2014},
NUMBER = {3},
PAGES = {633--643},
URL = {https://npg.copernicus.org/articles/21/633/2014/},
DOI = {10.5194/npg-21-633-2014}
}

@Article{npg-21-417-2014,
AUTHOR = {Gottwald, G. A.},
TITLE = {Controlling balance in an ensemble Kalman filter},
JOURNAL = {Nonlinear Processes in Geophysics},
VOLUME = {21},
YEAR = {2014},
NUMBER = {2},
PAGES = {417--426},
URL = {https://npg.copernicus.org/articles/21/417/2014/},
DOI = {10.5194/npg-21-417-2014}
}

@Article{npg-21-303-2014,
AUTHOR = {Gustafsson, N. and Bojarova, J. and Vignes, O.},
TITLE = {A hybrid variational ensemble data assimilation for the HIgh Resolution Limited Area Model (HIRLAM)},
JOURNAL = {Nonlinear Processes in Geophysics},
VOLUME = {21},
YEAR = {2014},
NUMBER = {1},
PAGES = {303--323},
URL = {https://npg.copernicus.org/articles/21/303/2014/},
DOI = {10.5194/npg-21-303-2014}
}

@Article{npg-20-1047-2013,
AUTHOR = {Weir, B. and Miller, R. N. and Spitz, Y. H.},
TITLE = {A potential implicit particle method for high-dimensional systems},
JOURNAL = {Nonlinear Processes in Geophysics},
VOLUME = {20},
YEAR = {2013},
NUMBER = {6},
PAGES = {1047--1060},
URL = {https://npg.copernicus.org/articles/20/1047/2013/},
DOI = {10.5194/npg-20-1047-2013}
}

@Article{npg-20-669-2013,
AUTHOR = {Buehner, M. and Morneau, J. and Charette, C.},
TITLE = {Four-dimensional ensemble-variational data assimilation for global deterministic weather prediction},
JOURNAL = {Nonlinear Processes in Geophysics},
VOLUME = {20},
YEAR = {2013},
NUMBER = {5},
PAGES = {669--682},
URL = {https://npg.copernicus.org/articles/20/669/2013/},
DOI = {10.5194/npg-20-669-2013}
}

@Article{npg-20-955-2013,
AUTHOR = {Amour, I. and Mussa, Z. and Bibov, A. and Kauranne, T.},
TITLE = {Using ensemble data assimilation to forecast hydrological flumes},
JOURNAL = {Nonlinear Processes in Geophysics},
VOLUME = {20},
YEAR = {2013},
NUMBER = {6},
PAGES = {955--964},
URL = {https://npg.copernicus.org/articles/20/955/2013/},
DOI = {10.5194/npg-20-955-2013}
}

@Article{npg-20-803-2013,
AUTHOR = {Bocquet, M. and Sakov, P.},
TITLE = {Joint state and parameter estimation with an iterative ensemble Kalman smoother},
JOURNAL = {Nonlinear Processes in Geophysics},
VOLUME = {20},
YEAR = {2013},
NUMBER = {5},
PAGES = {803--818},
URL = {https://npg.copernicus.org/articles/20/803/2013/},
DOI = {10.5194/npg-20-803-2013}
}

@Article{npg-21-19-2014,
AUTHOR = {Baker, L. H. and Rudd, A. C. and Migliorini, S. and Bannister, R. N.},
TITLE = {Representation of model error in a convective-scale ensemble prediction system},
JOURNAL = {Nonlinear Processes in Geophysics},
VOLUME = {21},
YEAR = {2014},
NUMBER = {1},
PAGES = {19--39},
URL = {https://npg.copernicus.org/articles/21/19/2014/},
DOI = {10.5194/npg-21-19-2014}
}

@Article{npg-21-569-2014,
AUTHOR = {Bonan, B. and Nodet, M. and Ritz, C. and Peyaud, V.},
TITLE = {An ETKF approach for initial state and parameter estimation in ice sheet modelling},
JOURNAL = {Nonlinear Processes in Geophysics},
VOLUME = {21},
YEAR = {2014},
NUMBER = {2},
PAGES = {569--582},
URL = {https://npg.copernicus.org/articles/21/569/2014/},
DOI = {10.5194/npg-21-569-2014}
}

@Article{npg-21-971-2014,
AUTHOR = {Cardinali, C. and \v{Z}agar, N. and Radnoti, G. and Buizza, R.},
TITLE = {Representing model error in ensemble data assimilation},
JOURNAL = {Nonlinear Processes in Geophysics},
VOLUME = {21},
YEAR = {2014},
NUMBER = {5},
PAGES = {971--985},
URL = {https://npg.copernicus.org/articles/21/971/2014/},
DOI = {10.5194/npg-21-971-2014}
}

@Article{npg-21-187-2014,
AUTHOR = {Michel, Y.},
TITLE = {Diagnostics on the cost-function in variational assimilations for meteorological models},
JOURNAL = {Nonlinear Processes in Geophysics},
VOLUME = {21},
YEAR = {2014},
NUMBER = {1},
PAGES = {187--199},
URL = {https://npg.copernicus.org/articles/21/187/2014/},
DOI = {10.5194/npg-21-187-2014}
}

@Article{npg-21-659-2014,
AUTHOR = {Marmain, J. and Molcard, A. and Forget, P. and Barth, A. and Ourmi\`eres, Y.},
TITLE = {Assimilation of HF radar surface currents to optimize forcing in the northwestern Mediterranean Sea},
JOURNAL = {Nonlinear Processes in Geophysics},
VOLUME = {21},
YEAR = {2014},
NUMBER = {3},
PAGES = {659--675},
URL = {https://npg.copernicus.org/articles/21/659/2014/},
DOI = {10.5194/npg-21-659-2014}
}

@Article{npg-21-393-2014,
AUTHOR = {Marsigli, C. and Montani, A. and Paccagnella, T.},
TITLE = {Provision of boundary conditions for a convection-permitting ensemble: comparison of two different approaches},
JOURNAL = {Nonlinear Processes in Geophysics},
VOLUME = {21},
YEAR = {2014},
NUMBER = {2},
PAGES = {393--403},
URL = {https://npg.copernicus.org/articles/21/393/2014/},
DOI = {10.5194/npg-21-393-2014}
}

@Article{npg-21-869-2014,
AUTHOR = {Metref, S. and Cosme, E. and Snyder, C. and Brasseur, P.},
TITLE = {A non-Gaussian analysis scheme using rank histograms for ensemble data assimilation},
JOURNAL = {Nonlinear Processes in Geophysics},
VOLUME = {21},
YEAR = {2014},
NUMBER = {4},
PAGES = {869--885},
URL = {https://npg.copernicus.org/articles/21/869/2014/},
DOI = {10.5194/npg-21-869-2014}
}

@Article{npg-21-745-2014,
AUTHOR = {Gustafsson, N. and Bojarova, J.},
TITLE = {Four-dimensional ensemble variational (4D-En-Var) data assimilation for the  HIgh Resolution Limited Area Model (HIRLAM)},
JOURNAL = {Nonlinear Processes in Geophysics},
VOLUME = {21},
YEAR = {2014},
NUMBER = {4},
PAGES = {745--762},
URL = {https://npg.copernicus.org/articles/21/745/2014/},
DOI = {10.5194/npg-21-745-2014}
}