i4DVar: An Integral Correcting Four‐Dimensional Variational Data Assimilation Method
Sign Up to like & getrecommendations! Published in 2021 at "Earth and Space Science"
DOI: 10.1029/2021ea001767
Abstract: Four‐dimensional variational data assimilation (4DVar) has become an increasingly important tool in data science with wide applications in many engineering and scientific fields. The current state‐of‐the‐art 4DVar offers only two choices in incorporating the forecast… read more here.
Keywords: variational data; assimilation; four dimensional; integral correcting ... See more keywords
A Multi-Time-Scale Four-Dimensional Variational Data Assimilation Scheme and Its Application to Simulated Radial Velocity and Reflectivity Data
Sign Up to like & getrecommendations! Published in 2020 at "Monthly Weather Review"
DOI: 10.1175/mwr-d-19-0203.1
Abstract: AbstractIn this study, a multi-time-scale four-dimensional variational data assimilation (MTS-4DVar) scheme is developed and applied to the assimilation of radar observations. The MTS-4DVar employs... read more here.
Keywords: assimilation; dimensional variational; four dimensional; time scale ... See more keywords
臭氧观测的全球四维变分资料同化技术 The Technologies for Global Four-Dimensional Variational Data Assimilation of Ozone Observations
Sign Up to like & getrecommendations! Published in 2017 at "Advances in Geosciences"
DOI: 10.12677/ag.2017.76088
Abstract: 针对平流层大气观测资料稀少的问题，提出利用同化卫星臭氧观测改进全球数值天气预报效果的方法。将复杂的臭氧资料同化问题转换为一个以大气运动控制方程为约束条件的大规模最优化问题，并实现了SCIAMACHY卫星臭氧观测的全球四维变分资料同化。试验结果表明:由于卫星臭氧观测资料同化的引入，一定程度上提高了地面报和探空报的同化利用率，总气柱臭氧含量预报场的分布具有明显变化，对南北半球形势场预报技巧评分具有一定幅度的提高。 In order to solve the problems of being short of stratospheric atmospheric observations, a method of improving the global numerical weather prediction (NWP) qualities is proposed by assimilating satellite ozone data. The complex problem… read more here.
Keywords: dimensional variational; data assimilation; global four; four dimensional ... See more keywords
A Framework for Four-Dimensional Variational Data Assimilation Based on Machine Learning
Sign Up to like & getrecommendations! Published in 2022 at "Entropy"
DOI: 10.3390/e24020264
Abstract: The initial field has a crucial influence on numerical weather prediction (NWP). Data assimilation (DA) is a reliable method to obtain the initial field of the forecast model. At the same time, data are the… read more here.
Keywords: four dimensional; var; assimilation; dimensional variational ... See more keywords
Determination of an Extremal in Two-Dimensional Variational Problems Based on the RBF Collocation Method
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DOI: 10.3390/e24101345
Abstract: This paper introduces a direct method derived from the global radial basis function (RBF) interpolation over arbitrary collocation nodes occurring in variational problems involving functionals that depend on functions of a number of independent variables.… read more here.
Keywords: two dimensional; collocation; dimensional variational; method ... See more keywords