Variational Data Assimilation System for Operational Regional Models at Japan Meteorological Agency
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This article is published in Journal of the Meteorological Society of Japan.The article was published on 2021-09-14 and is currently open access. It has received 3 citations till now. The article focuses on the topics: Numerical weather prediction & Operational system.read more
Citations
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ASUCA: The JMA Operational Non-hydrostatic Model
TL;DR: ASUCA as mentioned in this paper adopts hybrid parallelization using Message Passing Interface (MPI) and Open Multi Processing (OpenMP) for high computational efficiency on massive parallel scalar computers.
Journal ArticleDOI
A Four‐Dimensional Ensemble‐Variational (4DEnVar) Data Assimilation System Based on GRAPES‐GFS: System Description and Primary Tests
TL;DR: In this article , a four-dimensional ensemble-variational (4DEnVar) data assimilation (DA) system was developed based on the global forecast system of the Global/Regional Assimilation and Prediction System (GRAPES-GFS).
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Multiscale Nonlinearity of Error Growth in High-Resolution Forecasts for Mesoscale Convective Systems
TL;DR: In this paper , the authors examined the nonlinearity in a weather forecast, defined as the extent to which the initial opposite-sign state vector does not keep the same magnitude and opposite direction in a forecast time, in an environment containing a multiscale convective system.
References
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An Analysis of Transformations
George E. P. Box,David Cox +1 more
TL;DR: In this article, Lindley et al. make the less restrictive assumption that such a normal, homoscedastic, linear model is appropriate after some suitable transformation has been applied to the y's.
Journal ArticleDOI
Updating Quasi-Newton Matrices With Limited Storage
TL;DR: An update formula which generates matrices using information from the last m iterations, where m is any number supplied by the user, and the BFGS method is considered to be the most efficient.
Journal ArticleDOI
Variational quality control
Erik Anderson,Heikki Järvinen +1 more
TL;DR: In this paper, the authors describe the implementation of variational quality control in the operational four-dimensional variational data assimilation scheme at the European Centre for Medium-Range Weather Forecasts (ECMWF) the quality control takes place during the iterative solution of the variational analysis problem itself, rather than in a separate step prior to the main analysis.
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