An Adjoint-Free CNOP–4DVar Hybrid Method for Identifying Sensitive Areas Targeted Observations: Method Formulation and Preliminary Evaluation

Nonlinear Least Squares En4DVar to 4DEnVar Methods for Data Assimilation: Formulation, Analysis, and Preliminary Evaluation

(2018) Xiangjun Tian et al.   MONTHLY WEATHER REVIEW

An Efficient Local Correlation Matrix Decomposition Approach for the Localization Implementation of Ensemble-Based Assimilation Methods

(2018) Hongqin Zhang et al.   JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES

A Multigrid Nonlinear Least Squares Four-Dimensional Variational Data Assimilation Scheme With the Advanced Research Weather Research and Forecasting Model

(2018) Hongqin Zhang et al.   JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES

A Review of Targeted Observations

(2016) Sharanya J. Majumdar   BULLETIN OF THE AMERICAN METEOROLOGICAL SOCIETY

A nonlinear least-squares-based ensemble method with a penalty strategy for computing the conditional nonlinear optimal perturbations

(2016) Xiangjun Tian et al.   QUARTERLY JOURNAL OF THE ROYAL METEOROLOGICAL SOCIETY

Ensemble transform sensitivity method for adaptive observations

(2015) Yu Zhang et al.   ADVANCES IN ATMOSPHERIC SCIENCES

An enhanced ensemble-based method for computing CNOPs using an efficient localization implementation scheme and a two-step optimization strategy: formulation and preliminary tests

(2015) Xiangjun Tian et al.   QUARTERLY JOURNAL OF THE ROYAL METEOROLOGICAL SOCIETY

A non-linear least squares enhanced POD-4DVar algorithm for data assimilation

(2015) Xiangjun Tian et al.   TELLUS SERIES A-DYNAMIC METEOROLOGY AND OCEANOGRAPHY

Methods, current status, and prospect of targeted observation

(2013) Mu Mu   Science China-Earth Sciences

Implementations of a square-root ensemble analysis and a hybrid localisation into the POD-based ensemble 4DVar

(2012) Xiangjun Tian et al.   TELLUS SERIES A-DYNAMIC METEOROLOGY AND OCEANOGRAPHY

The impact of verification area design on tropical cyclone targeted observations based on the CNOP method

(2011) Feifan Zhou et al.   ADVANCES IN ATMOSPHERIC SCIENCES

Effect of random perturbations on adaptive observation techniques

(2011) M. J. Hossen et al.   INTERNATIONAL JOURNAL FOR NUMERICAL METHODS IN FLUIDS

A Study on the Reduction of Forecast Error Variance by Three Adaptive Observation Approaches for Tropical Cyclone Prediction

(2011) Xiaohao Qin et al.   MONTHLY WEATHER REVIEW

A POD-based ensemble four-dimensional variational assimilation method

(2011) Xiangjun Tian et al.   TELLUS SERIES A-DYNAMIC METEOROLOGY AND OCEANOGRAPHY

An Observing System Experiment for Tropical Cyclone Targeting Techniques Using the Global Forecast System

(2010) Sim D. Aberson et al.   MONTHLY WEATHER REVIEW

The Impact of Dropwindsonde Observations on Typhoon Track Forecasts in DOTSTAR and T-PARC

(2010) Kun-Hsuan Chou et al.   MONTHLY WEATHER REVIEW

An ensemble conditional nonlinear optimal perturbation approach: Formulation and applications to parameter calibration

(2010) Xiangjun Tian et al.   WATER RESOURCES RESEARCH

An ensemble-based explicit four-dimensional variational assimilation method

(2008) Xiangjun Tian et al.   JOURNAL OF GEOPHYSICAL RESEARCH

A Method for Identifying the Sensitive Areas in Targeted Observations for Tropical Cyclone Prediction: Conditional Nonlinear Optimal Perturbation

(2008) Mu Mu et al.   MONTHLY WEATHER REVIEW