NCAR Data Assimilation Research Section

Publications and presentations featuring ensemble Data Assimilation -
DART : the Data Assimilation Research Testbed.

The Publications section is about halfway down this page.

Presentations featuring DART: The Data Assimilation Research Testbed

Jeffrey Anderson Aug 2008
Using Small Ensembles in High Dimensions: Hierarchical Bayesian Approaches to Adaptive Ensemble Filters. (soon to be) Presented at the Joint Statistical Meetings 2008, Denver, CO, USA


Jeffrey Anderson July 2008
A non-gaussian ensemble filter for nonlinear models and discrete structures. [pdf] (soon to be) Presented at the University of Maryland, MD, USA


Kevin Raeder Jun 2008
Diagnosis of Noise in the FV core using DART. [pdf] Presented at the CCSM User Group meeting 2008, Breckenridge, CO, USA


Hui Liu Apr 2008
Improving Forecasts of Tropical Cyclones with Innovative GPSRO Satellite Observations [pdf] Presented at the Hurricanes session of the 2008 AMS, Orlando, FL, USA


Jeff Anderson Apr 2008
Adaptive Inflation for Ensemble Assimilation [pdf] Presented at the Workshop on Kalman Filtering, 4-9 April 2008, Marble Falls, TX, USA


Jeff Anderson Feb 2008
Using the DART-CAM Ensemble Data Assimilation System for Climate Model Development [pdf] Presented at the Atmosphere Model Working Group (AMWG), 14 February 2008, Boulder, CO, USA


Jeff Anderson Jan 2008
The Relation Between Ensemble Size and Expected Error in Ensemble Filter Data Assimilation [pdf] Presented at the 88th AMS Annual Meeting, 20--24 January 2008, New Orleans, Louisiana, USA


Josh Hacker Jan 2008
PBL State estimates with surface observations, a column model, and an ensemble filter: Probabilistic evaluation under various mesoscale regimes. [extended abstract] Presented at the 12th Conference on Integrated Observing and Assimilation Systems for Atmosphere, Oceans, and Land Surface (IOAS-AOLS), 20--24 January 2008, New Orleans, Louisiana, USA


Hui Liu Jan 2008
Multiple presentations at the 88th AMS Annual Meeting, 20--24 January 2008, New Orleans, Louisiana, USA
Impact of GPS Radio Occultation Observations on Ensemble Analyses and Forecasts of Typhoon Shanshan [ppt]
Improving Analyses and Forecasts of the Asian Monsoon with GPS Radio Occultation Refractivity Observations [ppt]


Nancy Collins Nov 2007
DART overview. [pdf] [animation1 (.mov)] [animation2 (.mov)] [animation3 (.mov)] talk presented at the NCAR booth of the Supercomputing 2007 Conference Reno, NV, USA


Tim Hoar Nov 2007
Data Assimilation Research Section - Overview [pdf] [animation1 (.mov)] [animation2 (.mpg)] Talk presented at the NCAR/Univ of Wyoming Retreat, Steamboat Springs, CO, USA


Hui Liu Aug 2007
The Impacts of Radio Occultation Data on analyses and prediction of the Monsoon and hurricanes using WRF ensemble forecast system. Talk presented at SPIE, San Diego, CA, USA


Hui Liu Jul 2007
Assimilation of GPS radio occultation refractivity with WRF using a non-local observation operator. [pdf] Poster presented at the IUGG, Data Assimilation session, Perugia, Italy.


Jeff Anderson Jun 2007
Data Assimilation for CAM - Research & Development. [pdf] Poster presented at the CCSM Summer Workshop, Breckenridge, CO, USA


David Dowell Jun 2007
Mesoscale WRF Surface-Data Assimilation: Spring 2007 Experiments at the National Severe Storms Laboratory [pdf] Talk presented at the WRF User's Workshop, Boulder, CO, USA


Jeff Anderson Jun 2007
Multiple talks presented at the 22nd Conference on Weather Analysis and Forecasting/18th Conference on Numerical Weather Prediction, Park City, UT, USA
DART: A Community Tool for Ensemble Data Assimilation Research and Development. [pdf],
An Introduction to Ensemble Kalman Filtering. [pdf], and
A Boxcar Kernel Filter for Assimilation of Discrete Structures (and Other Stuff). [pdf]


Josh Hacker Jun 2007
PBL state estimation with surface observations, a column model and an ensemble filter, Talk presented at the 22nd Conference on Weather Analysis and Forecasting/18th Conference on Numerical Weather Prediction, Park City, UT, USA


Nancy Collins May 2007
Parallel Implementation of Ensemble Filter Algorithms for Data Assimilation. [pdf] Poster presented at the LCI International Conference on High-Performance Clustered Computing, South Lake Tahoe, CA, USA


Kevin Raeder May 2007
Presentation and poster at the AGU Spring meeting 2007, Acapulco, Mexico.
Adaptive Spatially-varying Variance Inflation in an Ensemble Filter. [pdf]
A General Purpose Data Assimilation Facility: DART. [poster]


Josh Hacker Apr 2007
State estimation and predictability in the planetary boundary layer, Talk presented to the EGU General Assembly 2007, Vienna, Austria


Jeff Anderson Apr 2007
Using Observations to Estimate Climate Model Parameters [pdf] Talk presented at MSRI Symposium on Climate Change, Berkeley, CA, USA.


Jeff Anderson Mar 2007
The Data Assimilation Research Testbed: Powerful, Adaptive, and Fast Assimilation for Geophysical Applications. [pdf] Talk presented at NCAR, Boulder, CO, USA.


Ave Arellano Jan 2007
Constraining Tropospheric CO using Ensemble-based Data Assimilation [pdf] Talk presented to the AMS, San Antonio, TX, USA.


Jeff Anderson Jan 2007
Capabilities and Limitations of Ensemble Data Assimilation [pdf] Talk presented to the AMS, San Antonio, TX, USA.


Jeff Anderson Jan 2007
Using the DART-CAM Ensemble Data Assimilation System for Climate Model Development. [pdf] Talk presented to the Atmospheric Modeling Working Group (AMWG), Boulder, CO, USA.


D. Rostkier-Edelstein Jan 2007
PBL State Estimation with Surface Observations, a Column Model and an Ensemble Filter. Department seminar to The Department of Geophysics and Planetary Sciences, Tel-Aviv University, Israel


Hui Liu Dec 2006
Application of GPS radio occultation data in improving regional analyses of water vapor and temperature over tropical oceans. Talk presented at the China National Climate Center, Beijing, China


Hui Liu Dec 2006
Influence of COSMIC Satellite data in improving analyses over tropical oceans Talk presented at the AGU Fall meeting, San Francisco, CA, USA


Alexis Zubrow Oct 2006
EAKF-CMAQ: Development and initial evaluation of an Ensemble Adjustment Kalman Filter based data assimilation for CO. [Extended Abstract] Talk presented at the 5th Annual CMAS Conference, Chapel Hill, NC, USA


Hui Liu Oct 2006
Application of GPS radio occultation refractivity in improving tropical analyses of tempeature and water vapor. Talk presented at the First FORMSAT-3/COSMIC User Data Workshop, Boulder, CO, USA


D. Rostkier-Edelstein Oct 2006
PBL State Estimation with Surface Observations, a Column Model and an Ensemble Filter. Talk presented to the Environmental Sciences Division of the Israel Institute for Biological Research, Israel


Hui Liu Aug 2006
Assimilations of Global Positioning System radio occultation observations with an Ensemble filter in Atmospheric Prediction Models. Talk presented at the IEEE International Geoscience and Remote Sensing Symposium, Denver, CO, USA


D. Rostkier-Edelstein Aug 2006
Estimates of boundary layer profiles by means of ensemble-filter assimilation of near surface observations in a parameterized PBL - Application to transport and dispersion. Talk presented at the 10th Annual George Mason University Conference on Atmospheric Transport and Dispersion Modeling, George Mason University, Fairfax, VA, USA


Hui Liu Jun 2006
Exploring application of GPS RO data in improving analyses of T and Q in radiosonde sparse regions using WRF ensemble data assimilation system. Talk presented at the 7th WRF User Workshop, Boulder, CO, USA


Hui Liu Apr 2006
Exploring application of Radio Occultation measurements in Improving Analyses in traditional data sparse regions with WRF/DART ensemble data assimilation system. Talk presented at the 2nd Ensemble Data Assimilation Workshop, Austin, TX, USA


Josh Hacker Apr 2006
Retrieving PBL profiles with ensemble-filter assimilation: Experiments with real observations, uncovering model behavior, and finding parameter distributions. Talk presented at the 2nd Ensemble Data Assimilation Workshop, Austin, TX, USA


Hui Liu Dec 2005
Preliminary results from assimilation of GPS radio occultation data in WRF using an ensemble filter. [ppt]


Alain Caya 2005
Evaluation of an Ensemble Kalman Filter for WRF against a 3D-Var Assimilation System. [pdf]


Tim Hoar Oct 2004
An Operational-Quality Ensemble Assimilation System for NCAR's CAM Climate Model. [pdf] Talk presented at the "Workshop on Ensemble Methods" at the UK Met Office in Exeter.


Publications


in preparation



Anderson, J. L.,
A hierarchical ensemble filter for data assimilation. Monthly Weather Review, submitted.


Anderson, J. L.
Spatially-varying adaptive covariance inflation for an ensemble filter. Tellus A, submitted.


Anthes, R. A., P. A. Bernhardt, Y. Chen, L. Cucurull, K. F. Dymond, D. Ector, S. Healy, S.-P. Ho, D. C. Hunt, Y.-H. Kuo, H. Liu, K. Manning, C. McCormick, T. K. Meehan, W. J. Randel, C. Rocken, W. Schreiner, S. V. Sokolovskiy, S. Syndergaard, D. C. Thompson, K. E. Trenberth, T.-K. Wee, N. L. Yen, and Z. Zeng,
The COSMIC/FORMOSAT-3 Mission: Early Results, BAMS, to appear ... March 2008?


Liu H., J. L. Anderson, Y. Chen, Y.-H. Kuo, and C. Snyder
Exploring the impact of COSMIC radio occultation data on analyses and forecast of Hurricane Ernesto (2006) Monthly Weather Review, submitted.


Matsuo, T., H. Liu, J. Anderson, D. Marsh, and A. K. Smith
On model error growth in applications of ensemble Kalman filtering to the mesosphere and lower thermosphere region. Journal of Geophysical Research - Atmospheres., submitted.


Stensrud, David J., N. Yussouf, D. C. Dowell, and M. C. Coniglio
Assimilating surface data into a mesoscale model ensemble: Cold pool analyses from spring 2007. [pdf] Submitted to a special issue of Atmospheric Research for work presented at the European Severe Storms Conference.


Anderson, J. L.
Ensemble Kalman filters for very large geophysical applications. In preparation for the IEEE Control Systems special issue on 50th Anniversary of Kalman Filter.


Anderson, J., K. Raeder, T. Hoar, and N. Collins
An ensemble filter assimilation system for the Community Atmospheric Model.  , in preparation.


Anderson, J., and X. Wang
Posterior adaptive covariance inflation for ensemble filters.  , in preparation.


Arellano, A. F., K. Raeder, J. Anderson, and P. G. Hess
Ensemble-based chemical data assimilation in a global atmospheric model.  , in preparation.


Chen Y., H. Lui, Y.-H. Kuo, C. Synder, and J. L. Anderson
Impact of COSMIC radio occultation profiles on prediction of hurricane Ernesto (2006)  , in preparation.


Liu H., J. L. Anderson, Y.-H. Kuo, G. Wu, Y. Chen, and C. Snyder
Application of GPS radio occultation data in analysis and forecast of the East-Asian Monsoon rainfall.  , in preparation.


Snyder, C., T. Bengtsson, P. Bickel, and J. Anderson
Obstacles to high-dimensional particle filtering.  , in preparation.



2008



Zubrow, A., L. Chen, and V.R. Kotamarthi 2008
EAKF-CMAQ: Introduction and evaluation of a data assimilation for CMAQ based on the ensemble adjustment Kalman filter, J. Geophys. Res., 113, D09302, doi:10.1029/2007JD009267



2007



Arellano, A.F., K. Raeder, J. Anderson, P. Hess, L. Emmons, D. Edwards, G. Pfister, T. Campos, and G. Sachse, 2007
Evaluating model performance of an ensemble-based chemical data assimilation system during INTEX-B field mission. Atmos. Chem. Phys., 7, 5695-5710.


Arellano, A.F., P. Hess, D. Edwards, J. Anderson, K. Raeder, L. Emmons, G. Pfister, T. Campos, G. Diskin, J. Jimenez, and R. Subramanian, 2007
Chemical Data Assimilation of MOPITT CO and MODIS AOD Retrievals in the Community Atmosphere Model. Eos. Trans. AGU, 88(52), Fall Meet. Suppl., Abstract A14D-03.


Edwards, D., A. Arellano, and M. Deeter 2007
Defining Requirements for Future Satellite Air Quality Chemistry Observations. Eos. Trans. AGU, 88(52), Fall Meet. Suppl., Abstract A54C-01.


Khare, S. P., J. Anderson, T. J. Hoar, and D. Nychka, 2007
An investigation into the application of an ensemble Kalman smoother to high-dimensional geophysical systems. to appear in Tellus A (accepted 20 Sep 2007)


Liu, H., J. Anderson, Y.-H. Kuo, and K. Raeder, 2007
Importance of forecast error multivariate correlations in idealized assimilation of GPS radio occultation data with the Ensemble Adjustment filter. Monthly Weather Review, 135, 173-185. DOI:10.1175/MWR3270.1


Liu H., J. L. Anderson, Y.-H. Kuo, C. Snyder, and A. Caya, 2007
Evaluation of a non-local observation operator in assimilation of CHAMP radio occultation refractivity with WRF. Monthly Weather Review (in press).


Torn, R. D. and G. J. Hakim, 2007
Ensemble-based sensitivity analysis. To appear in Monthly. Weather. Review 134


Hacker, J. P., J. Anderson, and M. Pagowski, 2007
Improved vertical covariance estimates for ensemble filter assimilation of near-surface observations. Monthly Weather Review, 135, 1021-1036. DOI:10.1175/MWR3333.1


Anderson, J., and N. Collins , 2007
Scalable implementations of ensemble filter algorithms for data assimilation. Journal of Atmospheric and Oceanography Technology A, 24 1452-1463


Anderson, J. L., 2007
An adaptive covariance inflation error correction algorithm for ensemble filters. Tellus A, 59, 210-224.


Anderson, J. L., 2007
Exploring the need for localization in ensemble data assimilation using a hierarchical ensemble filter. Physica D 230, 99-111, doi:10.1016/j.physd.2006.02.011


Hacker, Joshua P., and Dorita Rostkier-Edelstein, 2007
PBL state estimation with surface observations, a column model, and an ensemble filter. Monthly Weather Review, 135, Issue 8, 2958-2972,  DOI:10.1175/MWR3443.1


Karspeck, A., and J. Anderson, 2007
Experimental implementation of an ensemble adjustment filter for an intermediate ENSO model. Journal of Climate, 20 4638-4658 DOI:10.1175/JCLI4245.1



2006



Aksoy, A., F. Zhang, and J. W. Nielsen-Gammon, 2006
Ensemble-based simultaneous state and parameter estimation with MM5. Geophysical Research Letters, 33, L12801


Aksoy, A., F. Zhang and J. W. Nielsen-Gammon, 2006
Ensemble-based simultaneous state and parameter estimation in a two-dimensional sea breeze model. Monthly Weather Review, 134, 2951-2970.

Khare, S. P., and J. Anderson, 2006
An examination of ensemble filter based adaptive observation methodologies. Tellus A, 58, 179-195


Chen, Y. and C. Snyder, 2006
Assimilation of hurricane position with an ensemble Kalman Filter. Geophysical Research Abstracts, 8, 09910


D. Rostkier-Edelstein, J. Hacker and M. Pagowski, 2006
Estimates of boundary layer profiles by means of ensemble-filter assimilation of near surface observations in a parameterized PBL, Proceedings of the 17th Symposium on Boundary Layers and Turbulence, AMS, San Diego, 16-22 May 2006.


J. Hacker, M. Pagowski and D. Rostkier-Edelstein, 2006
Parameter estimation in land-surface model using atmospheric data assimilation: finding distributions for use in an ensemble prediction system, Proceedings of the 17th Symposium on Boundary Layers and Turbulence, AMS, San Diego, 16-22 May 2006.



2005



Anderson, J. L., B. Wyman, S. Zhang, and T. Hoar, 2005
Assimilation of surface pressure observations using an ensemble filter in an idealized global atmospheric prediction system. Journal of the Atmospheric Sciences, 62, 2952-2938 DOI:10.1175/JAS3510.1



BD ... Before DART



Bengtsson, T., C. Snyder, and D. Nychka, 2003
A nonlinear filter that extends to high dimensional systems. Journal of Geophysical Research-Atmosphere, 108, 1-10


Zhang, F., C. Snyder, and J. Sun, 2004
Impacts of initial estimate and observation availability on convective-scale data assimilation with an ensemble Kalman filter. Monthly Weather Review, 132, 1238-1253.


Tribbia, J. J., and D. P. Baumhefner, 2004
Scale interactions and atmospheric predictablility: An updated perspective. Monthly Weather Review, 132, 703-713.


Anderson, J. L.,, 2003
A local least squares framework for ensemble filtering. Monthly Weather Review, 131, 634-642.


Tippett, M. K., J. L. Anderson, C. H. Bishop, T. M. Hamill, and J. S. Whitaker, 2003
Ensemble square root filters. Monthly Weather Review, 131, 1485-1490.


Zhang, S., and J. L. Anderson, 2003
Impact of spatially and temporally varying estimates of error covariance on assimilation in a simple atmospheric model. Tellus, 55A, 126-147.


Snyder, C., and F. Zhang, 2003
Assimilation of simulated Doppler radar observations with an ensemble Kalman filter Monthly Weather Review, 131, 1663-16776.