Joint NCAR/MMM CSU/CIRA Data Assimilation Workshop

September 19th 2005, Room 2072, Foothills Lab 3, NCAR, Boulder, Colorado

08:00 - 08:30 - Arrival, Refreshments.

08:30 - 08:40 - Welcome (Greg Holland, Introduces MMM, WRF and MMM DA Strategy)

08:40 - 08:50 - Welcome (Thomas Von Der Haar, Introduces CIRA, motivations)

08:50 - 09:00 - Logistics (Dale Barker)

Session 1: Variational Data Assimilation Techniques (Chair: D. Zupanski)

09:00 - 09:15 - The WRF-Var System (Barker)

09:15 - 09:30 - WRF 4D-Var (Huang)

09:30 - 09:45 - WRF Linear and Adjoint Model Development (Xiao)

09:45 - 10:00 - Cloud Resolving models in 4DVAR (Fowler and Vukicevic)

10:00 - 10:30 - Discussion on variational data assimilation (lead by chair)

10:30 - 10:45 - Break

Session 2: Ensemble Data Assimilation Techniques (Chair: Jenny Sun)

10:45 - 11:00 - Results from WRF/DART ensemble filter at synoptic scales (Snyder)

11:00 - 11:15 - Maximum Likelihood Ensemble Filter (M. Zupanski)

11:15 - 11:30 - Model error and parameter estimation (D. Zupanski)

11:30 - 12:00 - Discussion on ensemble data assimilation (lead by chair)

12:00 - 13:30 - Lunch

Session 3: Observational Issues (Chair: Andy Jones)

13:30 - 13:45 - Implementation of Radiance Assimilation in WRF-Var and Early Results (Liu)

13:45 - 14:00 - Assimilation of satellite radiance in all weather conditions (Vukicevic).

14:00 - 14:15 - Soil moisture data assimilation with microwave radiance (Jones)

14:15 - 14:30 - Mesoscale model skill analysis with satellite radiance observations (Sengupta)

14:30 - 14:45 - GPS Data Assimilation and COSMIC (Kuo)

14:45 - 15:00 - Use of Radar Observations to Improve Microphysics Parameterizations (Jenny Sun)

15:00 - 15:30 - Break

15:30 - 16:00 - Discussion on observational issues (lead by chair)

Session 4: Open Discussions (16:00 - 17:00) (Chairs: Barker + Vukicevic), e.g.

Radiance Assimilation (mesoscale, all-condition).

Community models: CSU work with WRF?

Microphysics (assimilation-based diagnostics, algorithms - invite Heymsfield, etc?).

17:00 - End Of Workshop

Purpose of Workshop:

"Tom Vonder Haar, CIRA's director, originally suggested the idea of a two-part workshop/meeting between MMM and CIRA data assimilation groups. This followed discussions with Greg Holland, who expressed interest to discuss possible avenues for exchange and collaboration. It was originally suggested that there be two 1/2 day meetings (one at CSU and one in Boulder). The focus at this time is on a single 1-day meeting in Boulder, with a potential follow-up meeting later in Fort Collins. Participants would be scientists in MMM/CIRA with an interest in discussing data assimilation activities and possible synergy. During the meetings there should be brief presentations and significant time for discussion."

NCAR/MMM Attendees:

Dale Barker, Alain Caya(?), Greg Holland, Hans Huang, Joe Klemp, Bill Kuo(?), Zhiquan Liu, Chris Snyder, Jenny Sun, Qingnong Xiao, David Dowell (?)

CSU/CIRA Attendees:

Arif Albayrak, Andy Jones, Steve Fletcher, Laura Fowler, Manajit Sengupta, Tom Vonder Haar, Tomi Vukicevic, Milija Zupanski and Dusanka Zupanski

Logistics:

Speakers: Please send powerpoint presentations to dmbarker@ucar.edu by 5pm Friday Sept. 16th.

Talks: Maximum of 12 minutes, leaving 3 minutes for immediate questions (time in discussion sessions later for more questions). Please keep in mind that we wish the presentations to serve the purpose of a very short review of a particular activity and introduction to the participants of the presenter's interest and expertise.

Directions to Foothills Lab:

http://www.mmm.ucar.edu/mmm/visit.html

Visitors report to FL2 reception desk, and ask to phone Dale Barker (x8148).

Room 2072 is in FL3 (walk across bridge from FL2, then on right opposite restrooms).

Dale Barker and Tomi Vukicevic

09/13/05