Ensemble Data Assimilation 2008

Sunday, April 6

Dinner: 7:00 pm

Poster presenters are encouraged to set up their poster displays this evening and continue to display their posters throughout the workshop.

Monday, April 7

Breakfast: 7:15 am

Session 0: Introduction (Monday: 8:15-8:30 am)

Session 1: Global applications (Monday8:30-10:00 am)

Session Chair: Eugenia Kalnay, UMD

8:30 Jeffrey Whitaker: Ensemble data assimilation for global NWP and reanalysis

8:50 Takemasa Miyoshi: Ensemble Kalman filter and 4D-Var inter-comparison with the JMA global operational experimental system

9:10 Ji-Sun Kang: CO2 data assimilation with the coupled atmosphere-vegetation model using local ensemble transform Kalman filter

9:30 Discussion

9:50-10:10 Break

Session 2: Regional applications(Monday10:10-12:00 pm)

Session Chair: Takemasa Miyoshi, JMA

10:10 Ryan Torn: Evaluating initial condition sensitivities for Hurricanes Katrina and Rita using ensemble data assimilation

10:30 Yongui Weng: Assimilating ground based and airborne Doppler observations from Hurricane Katrina

10:50 Massimo Bonavita: Regional ensemble data assimilation for operational NWP

11:10 Ellie Meng: Comparing EnKF with 3Dvar for regional-scale data assimilation

11:20 Meng Zhang: Coupling EnKF with 4DVar

11:30 Discussion

Lunch: 12:00pm – 1:00pm

Poster Session: 1:00-2:30 pm

Session Chair: Jeff Whitaker, NOAA/ESRL

Yongsheng Chen: Applying the EnKF for tropical cyclone forecasts

Michael Coniglio: Ensemble Kalman filter analyses and forecasts of Tropical Storm Erin over Oklahoma

Jidong Gao: A Comparison of the EnSRF and 4DVAR algorithms with a Shallow Water System

Dan Hodyss: Adaptive moderation of spurious ensemble correlations in the local ensemble transform Kalman filter

Matt Hoffman: LETKF application to the Chesapeake Bay

David Kuhl: Assimilation of SBUV/2 ozone retrievals with a local ensemble Kalman filter

Ting Lei: EnKF analysis of the 8 May 2003 Oklahoma City supercell storm

Huijuan Lu and Qin Xu: Impacts of radar observation accuracy and resolutions on ensemble-based storm-scale data assimilation

Edward Mansell: Microphysics comparison in storm-scale EnKF analysis

Chris Snyder: Ensemble Kalman filter assimilation of real radar observations: A multi-case comparative study of storm-scale forecasts and analyses

Afternoon Outdoor Activities: 2:30-6:00 pm

Dinner: 6:00 pm

Session 3: Localization techniques (Monday7:00-8:30 pm)

Session Chair: Craig Bishop, NRL

7:00 Craig Bishop: Flow adaptive moderation of spurious ensemble correlations

7:20 Fuqing Zhang: Successive covariance localization for hurricane data assimilation

7:40 Shu-chih Yang: Weight interpolation for efficient data assimilation with the LETKF

8:00 Discussion

Tuesday, April 8

Breakfast: 7:30 am

Session 4: Assimilation of surface observations (Tuesday 8:30-10:20 am)

Session Chair: Ryan Torn, NCAR/Albany

8:30 Joshua Hacker: An update on ensemble DA in the PBL with a single column model, and its use in quantifying land-atmosphere coupling strength

8:50 David Stensrud: Assimilating surface data into a mesoscale model ensemble: Initial results from spring 2007

9:10 David Dowell: Influences of surface-data assimilation on ensemble forecasts of convection initiation

9:30 Jili Dong: The impact of surface observations on the analysis and prediction of convective storms using EnKF data assimilation: OSS experiments with and without model and environmental errors

9:50 Discussion

10:20-10:40 Break

Session 5: Microphysics and parameter estimation (Tuesday10:40 am-12:10 am)

Session Chair: David Dowell, NCAR

10:40 Glen Romine: Storm-scale retrieval sensitivities to microphysical complexity and polarimetric observations

11:00 Youngsun Jung: The impact of simulated polarimetric radar data on the storm analysis and model microphysical parameters estimation

11:20 Will Lewis: Ensemble-based microphysical parameter estimation in tropical cyclone simulations

11:40 Discussion

Lunch: 12:00 pm – 1:00pm

Session 6: New techniques (Tuesday 1:00-2:30 pm)

Session Chair: Fuqing Zhang, Texas A&M

1:00 Eugenia Kalnay: Accelerating the spin-up of EnKF

1:20 Qin Xu: Adaptive time-expanded sampling for ensemble-based filter

1:40 Jeff Anderson: Adaptive Inflation for Ensemble Assimilation

2:00 Discussion

Afternoon Outdoor Activities: 2:30-6:00 pm

Dinner: 6:00 pm

Session 7: Predictability and sensitivity (Tuesday 7:00-8:30 pm)

Session Chair: Jeff Anderson, NCAR

7:00 Elizabeth Satterfield: Predictability of the performance of an ensemble-based analysis/forecast system

7:20 Dustan Wheatley: The impact of assimilating standard surface observations on WRF simulations of a severe mesoscale convective system

7:40 Junjie Liu: Estimating observation impact without adjoint model in an ensemble Kalman filter

8:00 Discussion

Wednesday, April 9

Breakfast: 7:30 am

Session 8: Convective-scale data assimilation (Wednesday 8:30- am)

Session Chair: Dave Stensrud, NSSL

8:30 Nathan Snook: Assimilation of CASA radar data of a tornadic convective system using an ensemble Kalman filter

8:50 Nusrat Yussouf: Impact of high temporal frequency radar data assimilation on storm-scale NWP model using observation system simulation experiment

9:10 Mingjing Tong (Ming Xue, presenter):Analysis and prediction of a tornadic thunderstorm case with the EnKF method: Real data and OSS experiments

9:30 Discussion

9:50-10:10 Break

Session 9: Panel discussion: where do we go from here? (Wednesday 10:40-12:00 am)

possible topics: brief summary of workshop, low-hanging fruit, obstacles to progress, unexplored areas

Moderators: Chris Snyder, David Dowell and

Lunch: 12:00 – 1:00 pm

Afternoon: Workshop Adjourn

Poster presenters should retrieve their posters.