11 January 2000
Long Beach, California

Zaitao Pan, Iowa State Universitypanz@iastate.edu
Jian-Hua (Joshua) Qan, GSFCqian@agnes.gsfc.nasa.gov
Michael Fox-Rabinovitz, U of MD and NASA/GSFCfoxab@atmos.umd.edu
Tanya Smirnova, FSLsmirnova@fsl.noaa.gov
Georg Grell, FSLgrell@fsl.noaa.gov
Ruby Leung, PNNruby.leung@pnl.gov
David Pllard, Penn Statepollard@essc.psu.edu
Eric Small, New Mexico Techesmall@nmt.edu
Xin-Zhong Liang, Illinois State Water Surveyxliang@uiuc.edu
Sin Chan Chou, CPTEC/INPE, Brazilchou@cptec.inpe.br
Fedor Mesinger, NCEP/EMCmesinger@ncep.noaa.gov
Ana Maria B. Nunes, CPTEC/INPE, Brazilbueam@cptec.inpe.br
Jens H. Christensen, DMI;jhc@dmi.dk
John Michalakes, ANL/NCARmichalak@ucar.edu
Bob Oglesby, Purdueroglesby@purdue.edu
Jay Larson, ANLlarson@mcs.anl.gov
Jinwon Kim, LBLjinwon.kim@lbl.gov
Norm Miller, LBLL;nlmiller@lbl.gov
Yuanlong Hu, MIThyl@mit.edu
Ming Chen, PSUcming@essc.psu.gov
Jimy Dudhia, NCARdudhia@ucar.edu
John Roads, Scripps/UCSDjroads@ucsd.edu
Chuck Hakkarinen, EPRIchakk@mecca.epri.com
Hans von Storch, GKSSstorch@gkss.de
Gene Takle, Iowa State Universitygstakle@iastate.edu
Linda Mearns
Also Bill Kuo, Bob Gall

Gene Takle welcomed the group, and the group participated in self introductions. Thanks were extended to the Electric Power Research Institute for the arrangements. A brief overview of PIRCS and its mission was given. Copies of the JGR paper on experiment 1a and the AMS extended abstract of experiment 1b were distributed. A status report on modeling results of experiment 1b showed that 12 models have submitted all the required data. February 15, 2000 is the deadline for groups to submit results for experiment 1b in order to be included in the paper to be submitted to JGR.

A brief presentation was made by Xin-Zhong Liang on results of using MM5v3 over the US for July 1993. He showed that the NCEP/NCAR reanalysis, compared to the ECMWF gave only about .30 correlation in data poor regions. By extending the grid 30% to the south, the model can capture the effect of sea surface temperatures in the Gulf within the model and compensates for the poor representation by the reanalysis.

CSL computing requests were discussed by C. Hakkarinen. The requests must demonstrate use of at least 4 and more likely 8 or 16 processors. A PIRCS collaborative proposal would be well received. Those that are interested will send a paragraph to ISU by Sat night to be included in the ISU/PIRCS proposal. URL is www.scd.ucar.edu/csl/.

PIRCS Experiment 1c (a 2yr run over US) was discussed. It was decided that the PIRCS domain needs to be extended south to capture the NA monsoon and the Gulf of Mexico. A resolution of 40 km might offer significant advantages over 60 or even 50 km for reasons discussed later by M. Fox-Rabinovicz. It was suggested that one group should do a study of the candidate domain sizes to find the optimum configuration. About 6 modeling groups indicated interest in doing this experiment.

Jian-Hua (Joshua) Qian gave a brief overview of the IAI/ARC work plan over South America. The period to be covered in a 2 yr, 3 month period ending May 99. Six models are included.

PIRCS 2 was discussed very briefly. Candidate regions are South America and West Africa (CATCH) region. John Roads mentioned that the GEWEX CATCH region in West
Africa is an area that has not been simulated by any other modeling groups. Also, this is the generation region for hurricanes that strike the US coast. The major problem is that this is a data-poor area. However, it would allow intermodel variances to be examined.

The advantage of the South American region is the availability of more data, particularly in the Brazil region where some tower data from the LBA experiment will be available. The steepness of the Andes terrain may offer another modeling challenge not encountered in the US simulation. Some modeling groups expressed interest in grid nesting and variable grid systems.

A brief presentation was made by Michael Fox-Rabinovicz on his stretched grid results. His simulation for July 1993 showed that he was able to get both the location and magnitude of the flood footprint quite correctly. He also showed sensitivity to resolution in the Louisiana region by running the same simulation at 60 km and 40 km. The 40-km simulation captured the high precipitation region whereas the 60-km simulation gave a very poor representation of this region.

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