Adaptive ensemble size reduction and inflation
نویسندگان
چکیده
An important question in ensemble based data assimilation scheme is how many ensembles do we require to correctly capture the important features in either our atmospheric or oceanic models given a set of observations. In this paper we present a method to evaluate how many ensembles we require. This method is based on the ensembles representing the modes of the system that contain the directions of maximum variability. We present the theory behind this method as well as an example with a global shallow water equations model on the sphere in conjunction with a ensemble filter under development at Florida State University and the Cooperative Institute for Research in the Atmosphere at Colorado State University.
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