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Total result(s) found: 20
  • ​Nested sampling algorithm for subsurface flow model selection, uncertainty quantification, and nonlinear calibration
    A. El-Sheikh, M. Wheeler, and I. Hoteit
    Water Resources Research, 49, 1-17, 2013
Keywords:
Contaminant remediation; Efficient sampling; Hydrocarbon reservoir; Information contents; Nonlinear calibration; Posterior distributions; Sampling algorithm; Uncertainty quantifications
  • ​Observation quality control with a robust ensemble Kalman filter
    S. Roh, M. Genton, M. Jun, I. Szunyogh, and I. Hoteit
    Monthly Weather Review, 141, 4414 - 4428, 2013
Keywords:
Ensemble forecasting; Error analysis; Kalman filter; Numerical model; Outlier; Quality control; Statistical analysis
  • Improving short-range ensemble Kalman storm surge forecasting using robust adaptive inflation
    U. Altaf, T. Butler, X. Luo, C. Dawson, T. Mayo, and I. Hoteit
    Monthly Weather Review, 141, 2705-2720, 2013
Keywords:
Climate modeling; Climate prediction; Data assimilation; Ensemble forecasting; Error analysis; Hurricane Ike 2008; Hurricane Katrina 2005; Hydrodynamics; Kalman filter; Storm surge
  • Dual states estimation of a subsurface flow-contaminant coupled model using ensemble Kalman filtering
    M. Elgharamti, I. Hoteit, and J. Valstar
    Advances in Water Resources, 60, 75-88, 2013
Keywords:
Dual states estimation; Ensemble Kalman filter; Flow and transport coupled models; Joint states estimation
  • ​Covariance inflation in the ensemble Kalman filter: A residual nudging perspective and some implications
    X. Luo and I. Hoteit
    Monthly Weather Review, 141, 3360 - 3368, 2013
Keywords:
Filtering techniques; Kalman filters
  • Remote sensing the phytoplankton seasonal succession of the Red Sea
    D. Raitsos, P. Pradhan, R. Brewin, G. Stenchikov, and I. Hoteit
    PLoS ONE, Volume 8, Issue 6, Article number e64909, 2013
Keywords:
Chlorophyll; Coral Reefs; Indian Ocean; Phytoplankton; Remote Sensing Technology; Seasons; Seawater; Spacecraft
  • An adaptive adjoint-based ensemble Kalman filter
    H. Song, I. Hoteit, B. Cornuelle, X. Luo, and A. Subramanian
    Monthly Weather Review, 141, 3343 - 3359, 2013
Keywords:
Data assimilation; Ensembles; Filtering techniques; Kalman filters; Optimization; Variational analysis
  • State estimates and forecasts of the loop current in the Gulf of Mexico using the MITgcm and its adjoint
    G. Gopalakrishnan, B. Cornuelle, I. Hoteit, D. Rudnick, and W. Brechner
    Journal of Geophysical Research, Volume 118, Issue 7, Pages 3292–3314, 2013
Keywords:
Gulf of Mexico; hindcast and forecast; loop current; MITgcm; ocean modeling; state estimation
  • Adjoint sensitivity studies of loop current and eddy shedding in the Gulf of Mexico using the MITgcm and its adjoint
    G. Gopalakrishnan, B. Cornuelle, and I. Hoteit
    Journal of Geophysical Research, Volume 118, Issue 7, Pages 3315-3335, 2013
Keywords:
Adjoint sensitivity; Gulf of Mexico; Hindcast/forecast; Loop current; MIT general circulation model; State estimation
  • Estimation of the drag coefficient from the upper ocean response to a hurricane: a variational data assimilation approach
    S. Zedler, G. Kanschat, I. Hoteit, and R. Korty
    Ocean Modelling, 68, 57-71, 2013
Keywords:
Drag coefficient adjustment; Hurricane; Mixed layer dynamics; Ocean response to a hurricane; Tropical cyclone; Upper ocean processes
  • Clustered iterative stochastic ensemble method for multi-modal calibration of subsurface flow models
    A. El-Sheikh, M. Wheeler, and I. Hoteit
    Journal of Hydrology, 491, 40-55, 2013
Keywords:
K-means Clustering; Multi-modal Optimization; Parameter estimation; Regularization; Subsurface Flow Models
  • Comparison of chlorophyll in the Red Sea derived from MODIS-Aqua and in vivo fluorescence 
    R. Brewin, D. Raitsos, Y. Pradhan, and I. Hoteit
    Remote Sensing of Environment, 136, 218-224, 2013
Keywords:
Chlorophyll; Comparison; Ocean colour; Phytoplankton; Red Sea; Remote sensing
  • Efficient particle filtering through residual nudging
    X. Luo and I. Hoteit
    Quarterly Journal of the Royal Meteorological Society, doi:10.1002/qj.2152, 2013
Keywords:
Data assimilation; Particle filter; Residual nudging
  • Sparse calibration of subsurface flow models using a stochastic ensemble method
    A. El-Sheikh, M. Wheeler, and I Hoteit
    Advances in Water Resources, 56, 14-26, 2013
Keywords:
Iterative stochastic ensemble method; Orthogonal matching pursuit; Parameter estimation; Sparse regularization; Subsurface flow models
  • Boosting iterative stochastic ensemble method for nonlinear calibration of subsurface flow models
    A. El-Sheikh, R. Tavakoli, M. Wheeler, and I. Hoteit
    Computer Methods in Applied Mechanics and Engineering, 259, 10-23, 2013
Keywords:
Boosting; Gaussian process regression; Iterative stochastic ensemble method; Karhunen-Loève expansion; Parameter estimation; Subsurface flow models
  • A MITgcm/DART ocean prediction and analysis system with application to the Gulf of Mexico
    I. Hoteit, T. Hoar, G. Gopalakrishnan, J. Anderson, N. Collins, B. Cornuelle, A. Kohl, and P. Heimbach
    Dynamics of Atmospheres and Oceans, 63, 1-23, 2013
Keywords:
Data assimilation; Ensemble Kalman filter; Gulf of Mexico; Ocean state estimation
  • ​A iterative stochastic ensemble method for parameter estimation of subsurface flow models
    A. El-Sheikh, M. Wheeler, and I. Hoteit
    Journal of Computational Physics, 242, 696-714, 2013
Keywords:
Iterative stochastic ensemble method; Parameter estimation; Regularization; Subsurface flow models
  • Atmospheric forcing of the winter air-sea heat fluxes over the northern Red Sea
    V. Papadopoulos, Y. Abualnaja, A. Bower, D. Raitsos, H. Kontoyiannis, and I. Hoteit
    Journal of Climate, 26, 1685-1701, 2013
Keywords:
Air-sea interaction; Extreme events; Forcing; Surface fluxes; Trends
  • Assessing a robust ensemble-based Kalman filter for efficient ecosystem data assimilation of the Cretan Sea
    G. Triantafyllou, I. Hoteit, X. Luo, K. Tsiara, and G. Petihakis
    Journal of Marine Systems, Volume 125, September 2013, Pages 90–100
Keywords:
Coupled biophysical models; Data assimilation; Ensemble Kalman filtering; H infinity filter; Kalman filter
  • A reduced adjoint approach to variational data assimilation
    U. Altaf, M. Algharamti, A. Heemink, and I. Hoteit
    Computer Methods in Applied Mechanics and Engineering, 254, 1-13, 2013
Keywords:
4DVAR; Model order reduction; Proper orthogonal decomposition