Dear WG4,

This is to provide those of you who did not attend the workshop with a

brief summary of workshop action items. I will be out of the office in

next two weeks and provide you with an update after my return.

1. I plan to create a workshop web site with the agenda and links to

papers. For those who attended: please upload your workshop presentations

into University of Utah ftp site at ftp.met.utah.edu/incoming. Please

contact Steve Krueger if you encounter problems.

2. After some discussions at the workshop, it was proposed that Jon

Petchfrom UK Met Office assumes the WG4 command on January 1, 2004.

3. Case 2 paper. Steve Krueger agreed to e-mail all of the co-authors

current version of the paper in the next few days. The paper seems to be

nearly completed and we need to put pressure on Steve to finish the draft.

4. WG4 is also interested in the status of the radiation/surface

flux intercomparison. I will e-mail Dr Tao about it.

5. The need to include more data into the analysis of the LBA case was

expressed at both the group discussions and at the Steering Group meeting

on Friday. This might turned out very helpful in quantifying daytime

convective development in westerly wind regime in the LBA area. I will

look at the boundary layer data I recently received from Alan Betts. Steve

Krueger volunteered to contact Pat Minnis and inquire about satellite

data. NASA Goddard and CSU folks might help us with the TRMM-LBA radar

data. It might be possible to use them to further quantify development

of convection from the observational point of view.

6. I will continue analyzing the benchmark ensemble simulation. Evolution

of cloud properties (along the lines presented by Chris Bretherton),

cloud width, and development of anvils will be my starting point. Any

suggestions are welcome.

7. We discussed directions WG4 may want to go in the future. As far as the

next case is concerned, I suggested two possibilities:

I. Extend LBA case into multi-day case with interactive radiation and

a simple land-surface model. This is to investigate feedbacks between

the surface and the atmosphere in a controlled environment, similarly

to Betts and Jakob study (JGR 2002). I volunteer to lead this case.

II. Select a case that will bring people associated with funded

programs, e.g., ARM. Our association with ARM was beneficial in the

past and will likely work well in the future. Looking into convective

downdrafts, the biggest difference between continental and

maritime deep convection according to WG4 previous findings,

is one possibility. ARM mesonet may turn very useful in such a case.

No consensus among WG4 members attending the workshop was reached in

this regard. A possible option is to pursue both cases.

8. It was proposed that the next Pan-GCSS meeting (similar to that in

Kananaskis more than a year ago) is held in Greece in late spring 2005.

Please e-mail me with any comments.

Regards,

Wojtek.