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Application of multigrid NLS-4DVar in radar radial velocity data assimilation with WRF-ARWZHANG, Lu; TIAN, Xiangjun; ZHANG, Hongqin · Atmospheric and Oceanic Science Letters · 2019
An Efficient Local Correlation Matrix Decomposition Approach for the Localization Implementation of Ensemble-Based Assimilation MethodsZhang, Hongqin; Tian, Xiangjun · Journal of Geophysical Research: Atmospheres · 2018
Nonlinear Least Squares En4DVar to 4DEnVar Methods for Data Assimilation: Formulation, Analysis, and Preliminary EvaluationTian, Xiangjun; Zhang, Hongqin; Feng, Xiaobing; Xie, Yuanfu · Monthly Weather Review · 2018
A Multigrid Nonlinear Least Squares Four-Dimensional Variational Data Assimilation Scheme With the Advanced Research Weather Research and Forecasting ModelZhang, Hongqin; Tian, Xiangjun · Journal of Geophysical Research: Atmospheres · 2018
An enhanced ensemble-based method for computing CNOPs using an efficient localization implementation scheme and a two-step optimization strategy: formulation and preliminary testsTian, Xiangjun; Feng, Xiaobing; Zhang, Hongqin; Zhang, Bin; Han, Rui · Quarterly Journal of the Royal Meteorological Society · 2016
Issue InformationEarth and Space Science · 2016
Issue InformationEarth and Space Science · 2015