Back to matchesWe found a matchYour institution may have access to this item. Find your institution then sign in to continue.TitleEstimating observation impact without adjoint model in an ensemble Kalman filter.AuthorsLiu, Junjie; Kalnay, EugeniaPublicationQuarterly Journal of the Royal Meteorological Society, 2008, Vol 134, Issue 634, p1327ISSN0035-9009Publication typeArticleDOI10.1002/qj.280