WRF-DFI project meeting – 20060905

Hans, Ju-Won, Wei Wang

Lilly room, 1:00-2:00pm, Tuesday 5 September 2006

1. The KMA requests

The KMA want to put DFI in WRFV2.1.2.

• The version is the trial version in KMA now.
• It may take too much time for KMA to install a new version on CRAY.
• KMA should be able to run DFI on its Cray this September.

2. The NCAR responses

• It is difficult to convert from current version of DFI to WRFV2.1.2. There are many changes from WRFV2.1.2. These changes are not part of DFI, but essential for DFI.
• The current DFI version should be closer to WRF2.2 than to WRF2.1.2. In the coming year, we may need a small task to upgrade DFI to 2.2.
• On the other hand, the current DFI version differs from WRF2.1.2 mainly in coding structures, not in meteorology.
• There are three executions for DFI: 1. Backward integration (with or without filter), 2. Forward integration (with filter), and 3. Forecast. To run DFI, we need at least 3 separate executables: tdfi1.exe, tdfi2.exe and fst.exe. It should be relatively easy to replace fst.exe with wrf212.exe. (If KMA wants consistency with early test using WRFV2.1.2, the same executable (wrf212.exe) can be used for forecast.)
• The released WRF should compile on the supported Cray systems (there are more than one type of Cray system - some run Cray OS, and others run Linux). We have been receiving changes continuously from Cray people to update compile options. We do not exactly understand why KMA has difficulty to install the WRF code on their system – unless code performance tuning is involved. If KMA has difficulty installing the model on its system, they should contact us and let us know the problems. We will work with Cray specialists to get that resolved.

3. Work plan for this week

Hans and Wei: Check the latest code for DFI to be sent KMA.

Ju-won:

• Contact Sang-Won about testing DFI at KMA;
• Make a powerpoint to explain the weather situation for the KMA case during May 4^th ~ 11^th 2006;
• Clean up results obtained at NCAR.

4. AOB

Ju-Won will return to on Sep. 11^th 2006.

We will have the next project meeting on: Thursday 7 Sep, 2 pm, Lilly room.