Deep learning-enhanced ensemble-based data assimilation for high-dimensional nonlinear dynamical systems
Deep learning-enhanced ensemble-based data assimilation for high-dimensional nonlinear dynamical systems
复制标题
高维非线性动力系统的深度学习增强型基于集成的数据同化
DOI:
10.1016/j.jcp.2023.111918
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发表时间:
2023
影响因子:
4.1
通讯作者:
Hassanzadeh, Pedram
中科院分区:
文献类型:
--
作者:
Chattopadhyay, Ashesh;Nabizadeh, Ebrahim;Bach, Eviatar;Hassanzadeh, Pedram
Data assimilation (DA) is a key component of many forecasting models in science and engineering. DA allows one to estimate better initial conditions using an imperfect dynamical model of the system and noisy/sparse observations available from the system. Ensemble Kalman filter (EnKF) is a DA algorithm that is widely used in applications involving high-dimensional nonlinear dynamical systems. However, EnKF requires evolving large ensembles of forecasts using the dynamical model of the system. This often becomes computationally intractable, especially when the number of states of the system is very large, e.g., for weather prediction. With small ensembles, the estimated background error covariance matrix in the EnKF algorithm suffers from sampling error, leading to an erroneous estimate of the analysis state (initial condition for the next forecast cycle). In this work, we propose hybrid ensemble Kalman filter (H-EnKF), which is applied to a two-layer quasi-geostrophic turbulent flow as a test case. This framework utilizes a pre-trained deep learning-based data-driven surrogate that inexpensively generates and evolves a large data-driven ensemble of the states to accurately compute the background error covariance matrix with smaller sampling errors. The H-EnKF framework outperforms EnKF with only dynamical model or only the data-driven surrogate, and estimates a better initial condition without the need for any ad-hoc localization strategies. H-EnKF can be extended to any ensemble-based DA algorithm, e.g., particle filters, which are currently too expensive to use for high-dimensional systems.
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影响因子:
3.2
作者:
K. Kondo;T. Miyoshi
通讯作者:
K. Kondo;T. Miyoshi
影响因子:
4.4
作者:
J. Bell;M. Day;J. Goodman;R. Grout;M. Morzfeld
通讯作者:
J. Bell;M. Day;J. Goodman;R. Grout;M. Morzfeld
DOI:
10.1080/16000870.2019.1600344
发表时间:
2019
期刊:
Tellus A: Dynamic Meteorology and Oceanography
影响因子:
--
作者:
Morzfeld, Matthias;Hodyss, Daniel
通讯作者:
Hodyss, Daniel
DOI:
10.1007/978-3-030-77977-1_33
发表时间:
2021
期刊:
Frontiers Appl. Math. Stat.
影响因子:
--
作者:
Maximilian L. Croci;Ushnish Sengupta;M. Juniper
通讯作者:
M. Juniper
影响因子:
4.1
作者:
Arcucci, Rossella;Mottet, Laetitia;Guo, Yi-Ke
通讯作者:
Guo, Yi-Ke