American Institute of Mathematical Sciences

Advanced
doi: 10.3934/fods.2021019
Online First

Online First articles are published articles within a journal that have not yet been assigned to a formal issue. This means they do not yet have a volume number, issue number, or page numbers assigned to them, however, they can still be found and cited using their DOI (Digital Object Identifier). Online First publication benefits the research community by making new scientific discoveries known as quickly as possible.

Readers can access Online First articles via the “Online First” tab for the selected journal.

A surrogate-based approach to nonlinear, non-Gaussian joint state-parameter data assimilation

John Maclean 1,, and  Elaine T. Spiller 2,

1. 

School of Mathematical Sciences, University of Adelaide, SA 5005, Australia
2. 

Department of Mathematical and Statistical Sciences, Marquette University, Milwaukee, WI 53201, USA

* Corresponding author: John Maclean

Received  October 2020 Revised  June 2021 Early access August 2021

Fund Project: The first author is supported by the ARC grant DP180100050, and acknowledges past support from ONR grant N00014-18-1-2204. The second author is supported by NSF grant DMS-1821338

Many recent advances in sequential assimilation of data into nonlinear high-dimensional models are modifications to particle filters which employ efficient searches of a high-dimensional state space. In this work, we present a complementary strategy that combines statistical emulators and particle filters. The emulators are used to learn and offer a computationally cheap approximation to the forward dynamic mapping. This emulator-particle filter (Emu-PF) approach requires a modest number of forward-model runs, but yields well-resolved posterior distributions even in non-Gaussian cases. We explore several modifications to the Emu-PF that utilize mechanisms for dimension reduction to efficiently fit the statistical emulator, and present a series of simulation experiments on an atypical Lorenz-96 system to demonstrate their performance. We conclude with a discussion on how the Emu-PF can be paired with modern particle filtering algorithms.

Keywords: Data assimilation, uncertainty quantification, data science, statistical surrogates, parameter estimation.
Mathematics Subject Classification: Primary: 62R07, 62M20, 62C12; Secondary: 62M05, 62G07, 86A10.
Citation: John Maclean, Elaine T. Spiller. A surrogate-based approach to nonlinear, non-Gaussian joint state-parameter data assimilation. Foundations of Data Science, doi: 10.3934/fods.2021019
References:
[1]

M. J. Bayarri, J. O. Berger, J. Cafeo, G. Garcia-Donato and F. Liu, Computer model validation with functional output, Ann. Statist., 35 (2007), 1874-1906.  doi: 10.1214/009053607000000163.  Google Scholar

[2]

J. Betancourt, F. Bachoc, T. Klein, D. Idier, R. Pedreros and J. Rohmer, Gaussian process metamodeling of functional-input code for coastal flood hazard assessment, Reliability Engineering & System Safety, 198 (2020). doi: 10.1016/j.ress.2020.106870.  Google Scholar

[3]

M. Bocquet, J. Brajard, A. Carrassi and L. Bertino, Bayesian inference of chaotic dynamics by merging data assimilation, machine learning and expectation-maximization, Foundations of Data Science, 2 (2020), 55-80.  doi: 10.3934/fods.2020004.  Google Scholar

[4]

J. Brajard, A. Carassi, M. Bocquet and L. Bertino, Combining data assimilation and machine learning to emulate a dynamical model from sparse and noisy observations: A case study with the Lorenz 96 model, J. Comput. Sci., 44 (2020), 11pp. doi: 10.1016/j.jocs.2020.101171.  Google Scholar

[5]

A. Carrassi, M. Bocquet, L. Bertino and G. Evensen, Data assimilation in the geosciences: An overview of methods, issues, and perspectives, Wiley Interdisciplinary Reviews: Climate Change, 9 (2018). doi: 10.1002/wcc.535.  Google Scholar

[6]

E. Cleary, A. Garbuno-Inigo, S. Lan, T. Schneider and A. M. Stuart, Calibrate, emulate, sample, J. Comput. Phys., 424 (2021), 20pp. doi: 10.1016/j.jcp.2020.109716.  Google Scholar

[7]

D. Crisan and K. Li, Generalised particle filters with Gaussian mixtures, Stochastic Process. Appl., 125 (2015), 2643-2673.  doi: 10.1016/j.spa.2015.01.008.  Google Scholar

[8]

A. Doucet, N. de Freitas and N. Gordon, Sequential Monte Carlo Methods in Practice, Statistics for Engineering and Information Science, Springer-Verlag, New York, 2001. doi: 10.1007/978-1-4757-3437-9.  Google Scholar

[9]

G. Evensen, Data Assimilation. The Ensemble Kalman Filter, Springer-Verlag, Berlin, 2009. doi: 10.1007/978-3-642-03711-5.  Google Scholar

[10]

G. Evensen, The ensemble Kalman filter: Theoretical formulation and practical implementation, Ocean Dynamics, 53 (2003), 343-367.  doi: 10.1007/s10236-003-0036-9.  Google Scholar

[11]

G. A. Gottwald and S. Reich, Supervised learning from noisy observations: Combining machine-learning techniques with data assimilation, Phys. D, 423 (2021), 15pp. doi: 10.1016/j.physd.2021.132911.  Google Scholar

[12]

M. Gu and J. O. Berger, Parallel partial Gaussian process emulation for computer models with massive output, Ann. Appl. Stat., 10 (2016), 1317-1347.  doi: 10.1214/16-AOAS934.  Google Scholar

[13]

M. Gu, J. Palomo and J. O. Berger, RobustGaSP: Robust Gaussian Stochastic Process Emulation in R, The R Journal, 11 (2019), 112-136.  doi: 10.32614/RJ-2019-011.  Google Scholar

[14]

M. E. Johnson, L. M. Moore and D. Ylvisaker, Minimax and maximin distance designs, J. Statist. Plann. Inference, 26 (1990), 131-148.  doi: 10.1016/0378-3758(90)90122-B.  Google Scholar

[15]

K. Law, A. Stuart and K. Zygalakis, Data Assimilation. A Mathematical Introduction, Texts in Applied Mathematics, 62, Springer, Cham, 2015. doi: 10.1007/978-3-319-20325-6.  Google Scholar

[16]

J. Liu and M. West, Combined parameter and state estimation in simulation-based filtering, in Sequential Monte Carlo Methods in Practice, Stat. Eng. Inf. Sci., Springer, New York, 2001,197–223. doi: 10.1007/978-1-4757-3437-9_10.  Google Scholar

[17]

J. S. Liu and R. Chen, Sequential Monte Carlo methods for dynamic systems, J. Amer. Statist. Assoc., 93 (1998), 1032-1044.  doi: 10.1080/01621459.1998.10473765.  Google Scholar

[18]

X. Liu and S. Guillas, Dimension reduction for Gaussian process emulation: An application to the influence of bathymetry on tsunami heights, SIAM/ASA J. Uncertain. Quantif., 5 (2017), 787-812.  doi: 10.1137/16M1090648.  Google Scholar

[19] E. N. Lorenz, Predictability - A problem partly solved, in Proceedings of Seminar on Predictability, Cambridge University Press, Reading, UK, 1996.  doi: 10.1017/CBO9780511617652.004.  Google Scholar
[20]

J. Maclean and E. S. V. Vleck, Particle filters for data assimilation based on reduced-order data models, Q. J. Roy. Meteor. Soc., 147 (2021), 1892-1907.  doi: 10.1002/qj.4001.  Google Scholar

[21]

M. Morzfeld and D. Hodyss, Gaussian approximations in filters and smoothers for data assimilation, Tellus A, 71 (2019). doi: 10.1080/16000870.2019.1600344.  Google Scholar

[22]

S. Nakano, G. Ueno and T. Higuchi, Merging particle filter for sequential data assimilation, Nonlin. Processes Geophys., 14 (2007), 395-408.  doi: 10.5194/npg-14-395-2007.  Google Scholar

[23]

D. Orrell and L. A. Smith, Visualizing bifurcations in high dimensional systems: The spectral bifurcation diagram, Internat. J. Bifur. Chaos Appl. Sci. Engrg., 13 (2003), 3015-3027.  doi: 10.1142/S0218127403008387.  Google Scholar

[24]

J. Poterjoy, A localized particle filter for high-dimensional nonlinear systems, Monthly Weather Review, 144 (2016), 59-76.  doi: 10.1175/MWR-D-15-0163.1.  Google Scholar

[25]

R. Potthast, A. Walter and A. Rhodin, A localized adaptive particle filter within an operational NWP framework, Monthly Weather Review, 147 (2019), 345-362.  doi: 10.1175/MWR-D-18-0028.1.  Google Scholar

[26]

C. E. Rasmussen and C. K. I. Williams, Gaussian Processes for Machine Learning, Adaptative Computation and Machine Learning, MIT Press, Cambridge, MA, 2006. Available from: http://www.gaussianprocess.org/gpml/chapters.  Google Scholar

[27] S. Reich and C. Cotter, Probabilistic Forecasting and Bayesian Data Assimilation, Cambridge University Press, New York, 2015.  doi: 10.1017/CBO9781107706804.  Google Scholar
[28]

J. Sacks, W. J. Welch, T. J. Mitchell and H. P. Wynn, Design and analysis of computer experiments, Statist. Sci., 4 (1989), 409-423.  doi: 10.1214/ss/1177012413.  Google Scholar

[29]

N. Santitissadeekorn and C. Jones, Two-stage filtering for joint state-parameter estimation, Monthly Weather Review, 143 (2015), 2028-2042.  doi: 10.1175/MWR-D-14-00176.1.  Google Scholar

[30]

T. J. Santner, B. J. Williams and W. I. Notz, The Design and Analysis of Computer Experiments, Springer Series in Statistics, Springer, New York, 2018. doi: 10.1007/978-1-4939-8847-1.  Google Scholar

[31]

C. Snyder, Particle filters, the "optimal" proposal and high-dimensional systems, in Proceedings of the ECMWF Seminar on Data Assimilation for Atmosphere and Ocean, 2011, 1–10. Available from: https://www.ecmwf.int/sites/default/files/elibrary/2012/12354-particle-filters-optimal-proposal-and-high-dimensional-systems.pdf. Google Scholar

[32]

C. Snyder, T. Bengtsson, P. Bickel and J. Anderson, Obstacles to high-dimensional particle filtering, Monthly Weather Review, 136 (2008), 4629-4640.  doi: 10.1175/2008MWR2529.1.  Google Scholar

[33]

P. J. van Leeuwen, Nonlinear data assimilation in geosciences: An extremely efficient particle filter, Q. J. Roy. Meteor. Soc., 136 (2010), 1991-1999.  doi: 10.1002/qj.699.  Google Scholar

[34]

P. J. van Leeuwen, H. R. Künsch, L. Nerger, R. Potthast and S. Reich, Particle filters for high-dimensional geoscience applications: A review, Q. J. Roy. Meteor. Soc., 145 (2019), 2335-2365.  doi: 10.1002/qj.3551.  Google Scholar

[35]

W. J. Welch, R. J. Buck, J. Sacks, H. P. Wynn, T. J. Mitchell and M. D. Morris, Screening, predicting, and computer experiments, Technometrics, 34 (1992), 15-25.  doi: 10.2307/1269548.  Google Scholar

show all references

References:
[1]

M. J. Bayarri, J. O. Berger, J. Cafeo, G. Garcia-Donato and F. Liu, Computer model validation with functional output, Ann. Statist., 35 (2007), 1874-1906.  doi: 10.1214/009053607000000163.  Google Scholar

[2]

J. Betancourt, F. Bachoc, T. Klein, D. Idier, R. Pedreros and J. Rohmer, Gaussian process metamodeling of functional-input code for coastal flood hazard assessment, Reliability Engineering & System Safety, 198 (2020). doi: 10.1016/j.ress.2020.106870.  Google Scholar

[3]

M. Bocquet, J. Brajard, A. Carrassi and L. Bertino, Bayesian inference of chaotic dynamics by merging data assimilation, machine learning and expectation-maximization, Foundations of Data Science, 2 (2020), 55-80.  doi: 10.3934/fods.2020004.  Google Scholar

[4]

J. Brajard, A. Carassi, M. Bocquet and L. Bertino, Combining data assimilation and machine learning to emulate a dynamical model from sparse and noisy observations: A case study with the Lorenz 96 model, J. Comput. Sci., 44 (2020), 11pp. doi: 10.1016/j.jocs.2020.101171.  Google Scholar

[5]

A. Carrassi, M. Bocquet, L. Bertino and G. Evensen, Data assimilation in the geosciences: An overview of methods, issues, and perspectives, Wiley Interdisciplinary Reviews: Climate Change, 9 (2018). doi: 10.1002/wcc.535.  Google Scholar

[6]

E. Cleary, A. Garbuno-Inigo, S. Lan, T. Schneider and A. M. Stuart, Calibrate, emulate, sample, J. Comput. Phys., 424 (2021), 20pp. doi: 10.1016/j.jcp.2020.109716.  Google Scholar

[7]

D. Crisan and K. Li, Generalised particle filters with Gaussian mixtures, Stochastic Process. Appl., 125 (2015), 2643-2673.  doi: 10.1016/j.spa.2015.01.008.  Google Scholar

[8]

A. Doucet, N. de Freitas and N. Gordon, Sequential Monte Carlo Methods in Practice, Statistics for Engineering and Information Science, Springer-Verlag, New York, 2001. doi: 10.1007/978-1-4757-3437-9.  Google Scholar

[9]

G. Evensen, Data Assimilation. The Ensemble Kalman Filter, Springer-Verlag, Berlin, 2009. doi: 10.1007/978-3-642-03711-5.  Google Scholar

[10]

G. Evensen, The ensemble Kalman filter: Theoretical formulation and practical implementation, Ocean Dynamics, 53 (2003), 343-367.  doi: 10.1007/s10236-003-0036-9.  Google Scholar

[11]

G. A. Gottwald and S. Reich, Supervised learning from noisy observations: Combining machine-learning techniques with data assimilation, Phys. D, 423 (2021), 15pp. doi: 10.1016/j.physd.2021.132911.  Google Scholar

[12]

M. Gu and J. O. Berger, Parallel partial Gaussian process emulation for computer models with massive output, Ann. Appl. Stat., 10 (2016), 1317-1347.  doi: 10.1214/16-AOAS934.  Google Scholar

[13]

M. Gu, J. Palomo and J. O. Berger, RobustGaSP: Robust Gaussian Stochastic Process Emulation in R, The R Journal, 11 (2019), 112-136.  doi: 10.32614/RJ-2019-011.  Google Scholar

[14]

M. E. Johnson, L. M. Moore and D. Ylvisaker, Minimax and maximin distance designs, J. Statist. Plann. Inference, 26 (1990), 131-148.  doi: 10.1016/0378-3758(90)90122-B.  Google Scholar

[15]

K. Law, A. Stuart and K. Zygalakis, Data Assimilation. A Mathematical Introduction, Texts in Applied Mathematics, 62, Springer, Cham, 2015. doi: 10.1007/978-3-319-20325-6.  Google Scholar

[16]

J. Liu and M. West, Combined parameter and state estimation in simulation-based filtering, in Sequential Monte Carlo Methods in Practice, Stat. Eng. Inf. Sci., Springer, New York, 2001,197–223. doi: 10.1007/978-1-4757-3437-9_10.  Google Scholar

[17]

J. S. Liu and R. Chen, Sequential Monte Carlo methods for dynamic systems, J. Amer. Statist. Assoc., 93 (1998), 1032-1044.  doi: 10.1080/01621459.1998.10473765.  Google Scholar

[18]

X. Liu and S. Guillas, Dimension reduction for Gaussian process emulation: An application to the influence of bathymetry on tsunami heights, SIAM/ASA J. Uncertain. Quantif., 5 (2017), 787-812.  doi: 10.1137/16M1090648.  Google Scholar

[19] E. N. Lorenz, Predictability - A problem partly solved, in Proceedings of Seminar on Predictability, Cambridge University Press, Reading, UK, 1996.  doi: 10.1017/CBO9780511617652.004.  Google Scholar
[20]

J. Maclean and E. S. V. Vleck, Particle filters for data assimilation based on reduced-order data models, Q. J. Roy. Meteor. Soc., 147 (2021), 1892-1907.  doi: 10.1002/qj.4001.  Google Scholar

[21]

M. Morzfeld and D. Hodyss, Gaussian approximations in filters and smoothers for data assimilation, Tellus A, 71 (2019). doi: 10.1080/16000870.2019.1600344.  Google Scholar

[22]

S. Nakano, G. Ueno and T. Higuchi, Merging particle filter for sequential data assimilation, Nonlin. Processes Geophys., 14 (2007), 395-408.  doi: 10.5194/npg-14-395-2007.  Google Scholar

[23]

D. Orrell and L. A. Smith, Visualizing bifurcations in high dimensional systems: The spectral bifurcation diagram, Internat. J. Bifur. Chaos Appl. Sci. Engrg., 13 (2003), 3015-3027.  doi: 10.1142/S0218127403008387.  Google Scholar

[24]

J. Poterjoy, A localized particle filter for high-dimensional nonlinear systems, Monthly Weather Review, 144 (2016), 59-76.  doi: 10.1175/MWR-D-15-0163.1.  Google Scholar

[25]

R. Potthast, A. Walter and A. Rhodin, A localized adaptive particle filter within an operational NWP framework, Monthly Weather Review, 147 (2019), 345-362.  doi: 10.1175/MWR-D-18-0028.1.  Google Scholar

[26]

C. E. Rasmussen and C. K. I. Williams, Gaussian Processes for Machine Learning, Adaptative Computation and Machine Learning, MIT Press, Cambridge, MA, 2006. Available from: http://www.gaussianprocess.org/gpml/chapters.  Google Scholar

[27] S. Reich and C. Cotter, Probabilistic Forecasting and Bayesian Data Assimilation, Cambridge University Press, New York, 2015.  doi: 10.1017/CBO9781107706804.  Google Scholar
[28]

J. Sacks, W. J. Welch, T. J. Mitchell and H. P. Wynn, Design and analysis of computer experiments, Statist. Sci., 4 (1989), 409-423.  doi: 10.1214/ss/1177012413.  Google Scholar

[29]

N. Santitissadeekorn and C. Jones, Two-stage filtering for joint state-parameter estimation, Monthly Weather Review, 143 (2015), 2028-2042.  doi: 10.1175/MWR-D-14-00176.1.  Google Scholar

[30]

T. J. Santner, B. J. Williams and W. I. Notz, The Design and Analysis of Computer Experiments, Springer Series in Statistics, Springer, New York, 2018. doi: 10.1007/978-1-4939-8847-1.  Google Scholar

[31]

C. Snyder, Particle filters, the "optimal" proposal and high-dimensional systems, in Proceedings of the ECMWF Seminar on Data Assimilation for Atmosphere and Ocean, 2011, 1–10. Available from: https://www.ecmwf.int/sites/default/files/elibrary/2012/12354-particle-filters-optimal-proposal-and-high-dimensional-systems.pdf. Google Scholar

[32]

C. Snyder, T. Bengtsson, P. Bickel and J. Anderson, Obstacles to high-dimensional particle filtering, Monthly Weather Review, 136 (2008), 4629-4640.  doi: 10.1175/2008MWR2529.1.  Google Scholar

[33]

P. J. van Leeuwen, Nonlinear data assimilation in geosciences: An extremely efficient particle filter, Q. J. Roy. Meteor. Soc., 136 (2010), 1991-1999.  doi: 10.1002/qj.699.  Google Scholar

[34]

P. J. van Leeuwen, H. R. Künsch, L. Nerger, R. Potthast and S. Reich, Particle filters for high-dimensional geoscience applications: A review, Q. J. Roy. Meteor. Soc., 145 (2019), 2335-2365.  doi: 10.1002/qj.3551.  Google Scholar

[35]

W. J. Welch, R. J. Buck, J. Sacks, H. P. Wynn, T. J. Mitchell and M. D. Morris, Screening, predicting, and computer experiments, Technometrics, 34 (1992), 15-25.  doi: 10.2307/1269548.  Google Scholar

Figure 1.  Schematic for state dependence on parameters: we plot the state at eight different samples (1a), then apply a variety of interpolating schemes (1b) and lastly a statistical surrogate (1c). The shaded region in the rightmost plot shows one standard deviation in uncertainty. The second and third plot allow for the state to be estimated at a variety of parameter values
Figure Options

Download full-size image

Download as PowerPoint slide

Figure 1) can be used in a particle filter update step. (A) The same GP mapping from parameter to state space is plotted (black line) along with the design points (blue dots along black line) used to fit that mapping and an observation (red dot and line) in state space along the left axis. A bi-modal prior distribution is plotted (light blue) along with samples from that distribution ($ 10^3 $ in light blue and 8 in black) along the horizontal axis. (B) Stem plots of the eight-sample PF posterior along with $ 10^3 $-sample normalized posterior histogram of parameters taking into account the likelihood of GP mapped prior samples given the observation in (A). Plotted behind the emuPF histogram is the equivalent (and nearly identical) histogram using the true mapping instead of the GP mapping for each of the $ 10^3 $ samples.">Figure 2.  Here we demonstrate how the GP example mapping from parameter space to state space (as in Figure 1) can be used in a particle filter update step. (A) The same GP mapping from parameter to state space is plotted (black line) along with the design points (blue dots along black line) used to fit that mapping and an observation (red dot and line) in state space along the left axis. A bi-modal prior distribution is plotted (light blue) along with samples from that distribution ($ 10^3 $ in light blue and 8 in black) along the horizontal axis. (B) Stem plots of the eight-sample PF posterior along with $ 10^3 $-sample normalized posterior histogram of parameters taking into account the likelihood of GP mapped prior samples given the observation in (A). Plotted behind the emuPF histogram is the equivalent (and nearly identical) histogram using the true mapping instead of the GP mapping for each of the $ 10^3 $ samples.
Figure Options

Download full-size image

Download as PowerPoint slide

Figure 3.  Overview of the novel synthesis of Gaussian process emulators with Data Assimilation methods
Figure Options

Download full-size image

Download as PowerPoint slide

Figure 4.  Visualisation of the internal Emu-PF mechanisms over one assimilation step. Left column shows components of dimension $ n_D = 100. $ Right column shows components of dimension $ N_F = 10,000 $. (a): parameter ensembles at time $ t_j $. (b): distribution of one state variable as a function of parameters. (c): parameter ensembles at time $ t_{j+1} $. Full details for this $ 8 $ state, $ 2 $ parameter experiment are given in section 4
Figure Options

Download full-size image

Download as PowerPoint slide

$ n_D = 100 $ model runs (as in the Emu-PF), and a "fine" PF that employs $ N_F = 10,000 $ model runs, equal to the number of samples in the Emu-PF emulator. Performance of Emu-PF is markedly better than the coarse PF">Figure 5.  Long term error statistics for the implementation of Emu-PF from fig. 4, compared to: a "coarse" PF that employs $ n_D = 100 $ model runs (as in the Emu-PF), and a "fine" PF that employs $ N_F = 10,000 $ model runs, equal to the number of samples in the Emu-PF emulator. Performance of Emu-PF is markedly better than the coarse PF
Figure Options

Download full-size image

Download as PowerPoint slide

Figure 6.  Error statistics for Experiment One, $ m = 8 $ observations at each observation time, of accuracy $ \sigma_0 = 1 $. In this (and every) plot, only every $ 20 $th data point is shown. For this mildly difficult filtering problem, we observe that the $ \Gamma = -1 $ implementation of section 3.2, that uses no state variables at all as emulator inputs, is stable and reasonably accurate
Figure Options

Download full-size image

Download as PowerPoint slide

Figure 7.  Error statistics for Experiment Two, $ m = 2 $ observations at each observation time, of accuracy $ \sigma_0 = 1 $. The $ \Gamma = -1 $ Emu-PF and fine PF both under-perform compared to their mean behaviour; the Emu-PF employing PCA is stable and accurate
Figure Options

Download full-size image

Download as PowerPoint slide

Figure 8.  Error statistics for Experiment Three, $ m = 4 $ observations at each observation time, of accuracy $ \sigma_0 = 0.5 $. In this case the $ \Gamma = 1 $ Emu-PF performs only as well as the coarse PF. However the Emu-PF employing PCA is still competitive with the, much more expensive, fine PF
Figure Options

Download full-size image

Download as PowerPoint slide

Figure 9.  Summary statistics for Experiment Four, long-time state estimation with $ m = 4 $ observations of accuracy $ \sigma_o = 1 $. The median RMSE for EnKF and fine PF are similar; however the EnKF error occasionally spikes. The sliced Emu-PF of section 3.2 is stable, with no large error spikes, and performs close to the fine PF in accuracy
Figure Options

Download full-size image

Download as PowerPoint slide

Figure 10.  RMSE against time for Experiment Five: dashed red lines plot the Fine PF (formulated under the Optimal Proposal), and solid blue lines plot the best-performing Emu-PF according to table 5. There is a clear improvement in skill in parameter estimation. State estimates are similar in skill (and, importantly, do possess some skill: the state RMSE is well below $ 5 $, the approximate long-term or climatic mean RMSE of forecasting with no DA)
Figure Options

Download full-size image

Download as PowerPoint slide

Table 1.  Summary statistics for twenty repetitions of experiment One. The 'Resampling' column counts how many resampling steps, out of a thousand, were performed by each algorithm.
RMSE ($ \theta $) Var ($ \theta $) RMSE ($ {{\mathbf x}} $) Var ($ {{\mathbf x}} $) Resampling
Fine PF 0.066 0.0035 0.34 0.15 226
Coarse PF 0.79 0.0015 2.1 0.16 663
EnKF 0.048 0.0018 0.32 0.12 -
Emu-PF ($ \Gamma=-1 $) 0.13 0.00026 2.4 5.1 483
Table Options

Download as excel

RMSE ($ \theta $) Var ($ \theta $) RMSE ($ {{\mathbf x}} $) Var ($ {{\mathbf x}} $) Resampling
Fine PF 0.066 0.0035 0.34 0.15 226
Coarse PF 0.79 0.0015 2.1 0.16 663
EnKF 0.048 0.0018 0.32 0.12 -
Emu-PF ($ \Gamma=-1 $) 0.13 0.00026 2.4 5.1 483
Table 2.  Summary statistics for twenty repetitions of experiment Two.
RMSE ($ \theta $) Var ($ \theta $) RMSE ($ {{\mathbf x}} $) Var ($ {{\mathbf x}} $) Resampling
Fine PF 0.074 0.0043 0.7 0.61 173
Coarse PF 0.49 0.0016 4.9 0.13 312
EnKF 0.065 0.0027 0.78 0.66 -
Emu-PF ($ \Gamma=-1 $) 0.38 0.00085 3.8 6.1 526
Emu-PF (PCA) 0.27 0.00051 3.1 0.58 339
Table Options

Download as excel

RMSE ($ \theta $) Var ($ \theta $) RMSE ($ {{\mathbf x}} $) Var ($ {{\mathbf x}} $) Resampling
Fine PF 0.074 0.0043 0.7 0.61 173
Coarse PF 0.49 0.0016 4.9 0.13 312
EnKF 0.065 0.0027 0.78 0.66 -
Emu-PF ($ \Gamma=-1 $) 0.38 0.00085 3.8 6.1 526
Emu-PF (PCA) 0.27 0.00051 3.1 0.58 339
Table 3.  Summary statistics for twenty repetitions of experiment Three.
RMSE ($ \theta $) Var ($ \theta $) RMSE ($ {{\mathbf x}} $) Var ($ {{\mathbf x}} $) Resampling
Fine PF 0.062 0.0032 0.28 0.13 243
Coarse PF 1 0.0012 3.4 0.11 739
EnKF 0.045 0.0017 0.25 0.1 -
Emu-PF ($ \Gamma=-1 $) 0.15 0.00034 2.4 5.1 590
Emu-PF (PCA) 0.084 0.00075 1.5 0.085 334
Table Options

Download as excel

RMSE ($ \theta $) Var ($ \theta $) RMSE ($ {{\mathbf x}} $) Var ($ {{\mathbf x}} $) Resampling
Fine PF 0.062 0.0032 0.28 0.13 243
Coarse PF 1 0.0012 3.4 0.11 739
EnKF 0.045 0.0017 0.25 0.1 -
Emu-PF ($ \Gamma=-1 $) 0.15 0.00034 2.4 5.1 590
Emu-PF (PCA) 0.084 0.00075 1.5 0.085 334
Table 4.  Summary statistics for Experiment Four
RMSE ($ {{\mathbf x}} $) Var ($ {{\mathbf x}} $) Resampling
Fine PF 0.47 0.15 1706
Coarse PF 5.1 0.16 9917
EnKF 1 0.096 -
Emu-PF (Localized) 0.83 0.31 3566
Table Options

Download as excel

RMSE ($ {{\mathbf x}} $) Var ($ {{\mathbf x}} $) Resampling
Fine PF 0.47 0.15 1706
Coarse PF 5.1 0.16 9917
EnKF 1 0.096 -
Emu-PF (Localized) 0.83 0.31 3566
Table 5.  Summary statistics for twenty repetitions of experiment Five.
RMSE ($ \theta $) Var ($ \theta $) RMSE ($ {{\mathbf x}} $) Var ($ {{\mathbf x}} $) Resampling
Fine OP-PF 1.2 0.0075 1.9 3.3 226
Coarse OP-PF 1.2 0.004 2.0 2.8 205
EnKF 1.1 0.00042 1.5 1.8 -
Emu-PF ($ \Gamma=-1 $) 0.5 0.0017 2.6 3.5 243
Emu-PF ($ \Gamma=+2 $) 0.75 0.0035 2.0 3.7 232
Emu-PF (PCA) 1.1 0.061 2.0 2.8 238
Table Options

Download as excel

RMSE ($ \theta $) Var ($ \theta $) RMSE ($ {{\mathbf x}} $) Var ($ {{\mathbf x}} $) Resampling
Fine OP-PF 1.2 0.0075 1.9 3.3 226
Coarse OP-PF 1.2 0.004 2.0 2.8 205
EnKF 1.1 0.00042 1.5 1.8 -
Emu-PF ($ \Gamma=-1 $) 0.5 0.0017 2.6 3.5 243
Emu-PF ($ \Gamma=+2 $) 0.75 0.0035 2.0 3.7 232
Emu-PF (PCA) 1.1 0.061 2.0 2.8 238
[1]

Alex Capaldi, Samuel Behrend, Benjamin Berman, Jason Smith, Justin Wright, Alun L. Lloyd. Parameter estimation and uncertainty quantification for an epidemic model. Mathematical Biosciences & Engineering, 2012, 9 (3) : 553-576. doi: 10.3934/mbe.2012.9.553
[2]

Ryan Bennink, Ajay Jasra, Kody J. H. Law, Pavel Lougovski. Estimation and uncertainty quantification for the output from quantum simulators. Foundations of Data Science, 2019, 1 (2) : 157-176. doi: 10.3934/fods.2019007
[3]

Weihong Guo, Yifei Lou, Jing Qin, Ming Yan. IPI special issue on "mathematical/statistical approaches in data science" in the Inverse Problem and Imaging. Inverse Problems & Imaging, 2021, 15 (1) : I-I. doi: 10.3934/ipi.2021007
[4]

Jiangqi Wu, Linjie Wen, Jinglai Li. Resampled ensemble Kalman inversion for Bayesian parameter estimation with sequential data. Discrete & Continuous Dynamical Systems - S, 2021  doi: 10.3934/dcdss.2021045
[5]

Alexandre J. Chorin, Fei Lu, Robert N. Miller, Matthias Morzfeld, Xuemin Tu. Sampling, feasibility, and priors in data assimilation. Discrete & Continuous Dynamical Systems, 2016, 36 (8) : 4227-4246. doi: 10.3934/dcds.2016.36.4227
[6]

Débora A. F. Albanez, Maicon J. Benvenutti. Continuous data assimilation algorithm for simplified Bardina model. Evolution Equations & Control Theory, 2018, 7 (1) : 33-52. doi: 10.3934/eect.2018002
[7]

Andreas Chirstmann, Qiang Wu, Ding-Xuan Zhou. Preface to the special issue on analysis in machine learning and data science. Communications on Pure & Applied Analysis, 2020, 19 (8) : i-iii. doi: 10.3934/cpaa.2020171
[8]

Xin Guo, Lei Shi. Preface of the special issue on analysis in data science: Methods and applications. Mathematical Foundations of Computing, 2020, 3 (4) : i-ii. doi: 10.3934/mfc.2020026
[9]

Issam S. Strub, Julie Percelay, Olli-Pekka Tossavainen, Alexandre M. Bayen. Comparison of two data assimilation algorithms for shallow water flows. Networks & Heterogeneous Media, 2009, 4 (2) : 409-430. doi: 10.3934/nhm.2009.4.409
[10]

Joshua Hudson, Michael Jolly. Numerical efficacy study of data assimilation for the 2D magnetohydrodynamic equations. Journal of Computational Dynamics, 2019, 6 (1) : 131-145. doi: 10.3934/jcd.2019006
[11]

Yuan Pei. Continuous data assimilation for the 3D primitive equations of the ocean. Communications on Pure & Applied Analysis, 2019, 18 (2) : 643-661. doi: 10.3934/cpaa.2019032
[12]

Juan Carlos De los Reyes, Estefanía Loayza-Romero. Total generalized variation regularization in data assimilation for Burgers' equation. Inverse Problems & Imaging, 2019, 13 (4) : 755-786. doi: 10.3934/ipi.2019035
[13]

Michele La Rocca, Cira Perna. Designing neural networks for modeling biological data: A statistical perspective. Mathematical Biosciences & Engineering, 2014, 11 (2) : 331-342. doi: 10.3934/mbe.2014.11.331
[14]

Adam Larios, Yuan Pei. Approximate continuous data assimilation of the 2D Navier-Stokes equations via the Voigt-regularization with observable data. Evolution Equations & Control Theory, 2020, 9 (3) : 733-751. doi: 10.3934/eect.2020031
[15]

Xiao-Bing Li, Qi-Lin Wang, Zhi Lin. Optimality conditions and duality for minimax fractional programming problems with data uncertainty. Journal of Industrial & Management Optimization, 2019, 15 (3) : 1133-1151. doi: 10.3934/jimo.2018089
[16]

Andrew J. Majda, Michal Branicki. Lessons in uncertainty quantification for turbulent dynamical systems. Discrete & Continuous Dynamical Systems, 2012, 32 (9) : 3133-3221. doi: 10.3934/dcds.2012.32.3133
[17]

Jing Li, Panos Stinis. Mori-Zwanzig reduced models for uncertainty quantification. Journal of Computational Dynamics, 2019, 6 (1) : 39-68. doi: 10.3934/jcd.2019002
[18]

H. T. Banks, Robert Baraldi, Karissa Cross, Kevin Flores, Christina McChesney, Laura Poag, Emma Thorpe. Uncertainty quantification in modeling HIV viral mechanics. Mathematical Biosciences & Engineering, 2015, 12 (5) : 937-964. doi: 10.3934/mbe.2015.12.937
[19]

Ariel Cintrón-Arias, Carlos Castillo-Chávez, Luís M. A. Bettencourt, Alun L. Lloyd, H. T. Banks. The estimation of the effective reproductive number from disease outbreak data. Mathematical Biosciences & Engineering, 2009, 6 (2) : 261-282. doi: 10.3934/mbe.2009.6.261
[20]

Geir Evensen, Javier Amezcua, Marc Bocquet, Alberto Carrassi, Alban Farchi, Alison Fowler, Pieter L. Houtekamer, Christopher K. Jones, Rafael J. de Moraes, Manuel Pulido, Christian Sampson, Femke C. Vossepoel. An international initiative of predicting the SARS-CoV-2 pandemic using ensemble data assimilation. Foundations of Data Science, 2020  doi: 10.3934/fods.2021001

 Impact Factor: 

Tools

Metrics

  • PDF downloads (28)
  • HTML views (95)
  • Cited by (0)

Other articles
by authors

[Back to Top]

Copyright © 2021 American Institute of Mathematical Sciences