College of Engineering and Physical Sciences

Gabor Vali, Professor Emeritus

Retired Since September 2006
Department of Atmospheric Science
College of Engineering and Physical Sciences
University of Wyoming
Mailing Address: 1000 E. University Ave., Laramie, WY 82071
E-mail: vali@uwyo.edu
Dept. phone: (307) 766-3245
Fax: (307) 766-2635

 

Education:

• B.S., Sir George Williams University (Montreal), 1961
• M.S., Physics, McGill University (Montreal), 1964
• Ph.D., Physics, McGill University (Montreal), 1968
  
  

Areas of Expertise:

• Cloud and precipitation physics. Ice nucleation.
  
  

Selected Publications (By Topic):

• Ice Nucleation
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• Cloud Studies
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• Various
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UWYO DYCOMS Project Reports:

• LWC instrument comparisons. Posted October 6, 2004.

• Summary of findings for rf05. Paper for the International Cloud Physics Conference, 2004. Posted March 17, 2004.

• rf01 no drizzle portion. Images and statistics of reflectivity and vertical velocity for the non-drizzling portion of RL2, 1155-1207 UTC.

• rf07 reflectivity pdfs given here show that the drizzle rate decreased during the night between 0800 and 1400 UTC. Posted September 24, 2003.

• " Indentifying drizzle within marine stratus with W-band radar reflectivity profiles." S. thesis by Wang, Jingyun. Posted: June 6, 2003.

• Circle images linked here are for one of the circle patterns from each flight. The images depict radar reflectivity from the nadir beam of the W-band instrument on the C-130. Posted February 7, 2003.

• rf05 - Flow field in the radar scan plane. Images found under this link show the results of the dual-Doppler analyses for the 10:30 to 10:58 circle. There are 15 pages of it. The flight altitude was 998 m. The grid spacing for these analyses is 25 m in the vertical and 22 m in the horizontal, though only every third point in the horizontal is shown in the figures. The images have roughly 2:1 horizontal to vertical aspect ratios. The horizontal winds represent the local deviation of the wind from the large-scale average in the vertical plane extendig down from the flight path. The narrower strips contain images of the reflectivity field and of the vertical velocity at 1:1 aspect ratio. The abscissa for these plots is the azimuth angle of the quasi-circular flight track, but time is also given. These analyses were done and the images were produced by David Leon.    Posted: December 5, 2002.

• "Rain rate - reflectivity relationship for marine stratus"S. thesis by Qing Yang. Posted: December 5, 2002.

• rf05 - Case of minumum drizzle. Part 2. Posted: September 13, 2002.

• rf05 - Case of minumum drizzle. Part 1. Posted: May 25, 2002.   Revised May 29, 2002.

• Z-R relationship from in-situ probe data. Posted: May 5, 2002.

• Reference hydrometeor distributions.

NOTE: Much of the material is based on work supported by the National Science Foundation under Grant No. 0094956 and others. Any opinions, findings, and conclusions or recommendations expressed in this material are those of the author(s) and do not necessarily reflect the views of the National Science Foundation.

 

Past Professional Activities:

• 1970: Participant for "Review Report on Weather Modification", for the Canada Department of Agriculture.

• 1973: Participated in the writing of the AMS/NSF Cloud Physics Review.

• 1975: Organized and chaired at the University of Wyoming the Third International Workshop on Ice Nucleation Measurement. This workshop was held under the auspices of the Committee on Nucleation of the International Commission for Cloud Physics.

• 1975: Local host for AMS Symposium on the Prediction and Measurement of Ice Crystal Concentrations in Clouds.

• 1975-1977: Member, AMS Cloud Physics Committee

• 1976: Chair, Review Panel for NCAR's Research Aviation Facility

• 1976-1979: Member, Committee on Aerobiology, National Research Council, National Academy of Sciences.

• 1977: Chair, AMS Cloud Physics Committee

• 1977: Sabbatical (one semester) - Commonwealth Scientific and Research Organization, Cloud Physics Division, Sydney, Australia.

• 1978: Participant, Atmospheric Research Review Workshop for the NRC Committee on Atmospheric Sciences

• 1980-1982: Member, AMS Committee on Weather Modification

• 1980-1988: Chairman, Committee on Nucleation and Atmospheric Aerosols; International Commission on Cloud Physics International Association for Meteorology and Atmospheric Physics, IUGG.

• 1982-1983: Chair, Scientific Program Evaluations Committee of the University Corporation for Atmospheric Research.

• 1983: Reviewer, for Task Groups A, B, C, and D of the National Acid Precipitation Assessment Program.

• 1983: Participant, Discussion Seminar on Precipitation Management, organized by the National Research Council for the Agency for International Development.

• 1984: Co-Chairman, XI International Conference on Atmospheric Aerosols, Condensation and Ice Nuclei. Budapest, Hungary.

• 1985: Guest editor of "Journal de Recherches Atmospheriques" Special Issue.

• 1985: Invited Lecturer at the "Autumn Workshop in Cloud Physics and Climate", International Centre for Theoretical Physics, Trieste, Italy.

• 1986: Co-Author: "Report to the Office of Technology Assessment on the impact of ice-nucleating bacteria on crops".

• 1986-1987: Sabbatical leave (one year): Theta Associates. Short courses on cloud physics and weather modification given in Casablanca, Morocco and ; Cooperative Institute for Research in Environmental Sciences, Boulder, Colorado; Centre National de Recherche Meteorologique, Toulouse, France.

• 1987: Invited Lecturer at the "Second Autumn Workshop in Cloud Physics and Climate", International Centre for Theoretical Physics, Trieste, Italy.

• 1987-1991: Co-Chair, International Aerosol Climatology Project (sponsored by Int'l Commission on Clouds and Precipitation and by the Int'l Radiation Commission; IAMAP, IUGG). Chairman, Sub-Working Group #2 on Aerosol-Cloud Interactions.

• 1988: Lecturer, Chiang Mai, Thailand, US Bureau of Reclamation short course on weather modification.

• 1990: Invited participant -- Workshop on Precipitation Physics of Tropical Convective Systems. Fortaleza. Brazil.

• 1990: Invited participant -- Review meeting of the findings and recommendations of SACPEX I. World Meteorological Organization, Geneva, Switzerland.

• 1988-1992: Member, Advisory Committee for Atmospheric Sciences, National Science Foundation.

• 1988-1992: Editor, Journal of Applied Meteorology (American Meteorological Society).

• 1989-1993: Member, UCAR/UNIDATA Policy Committee

• 1993: Organizer - "Sixth International Conference on Biological Ice Nucleation", Laramie, Wyoming, August 4-6, 1993

• 1993: Member, Steering Committee for "Role of Clouds Energy and Water (ROCEW)", NSF.

• 1994: Member, Long-Range Planning Committee, NSF/ATM.

• 1994-1995: Sabbatical leave (academic year): Fulbright Scholar, Visiting Professor at the Department of Analytical Chemistry, University of Veszprem, Hungary. Visiting lecturer at the Eotvos Lorand University, Budapest, Hungary.

• 1995: Invited expert to the Precipitation Enhancement Workshop conducted under the auspices of the Multilateral Water Resources Group in support of the Middle East Peace Process. Terrigal, Australia.

• 1996: Invited expert to symposium on "Theoretical and Practical Aspects of a Regional Precipitation Enhancement Program for the Middle East and Mediterranean". Sponsored by the European Union. Bari, Italy.

• 1997: Invited participant at the "WMO Workshop on Measurements of Cloud Properties for Forecasts of Weather" held in Mexico City, Mexico

• 1999: Invited participant at the "Workshop on Warm Rain Modification." Sponsored by the World Meteorological Organization and the State of Durango. Mazatlan, Mexico.

• 1996-2000: Vice-President, International Commission on Clouds and Precipitation, IAMAS/IUGG

• 2001: Guest Editor, Special Issue of the journal "Atmospheric Research".

• Board of Trustees, University Corporation for Atmospheric Research (first elected 1997-2000; reelected 2001-2004).

• 2002-2003: Reviewer of "Critical Issues in Weather Modification Research" report by the Committee on the Status and Future Directions in U.S Weather Modification Research and Operations, National Research Council. National Academies Press.

• 2005-2006: Evaluator for the WMO/UAE International Prize for Weather Modification.

• 2002-2012: Member of World Meteorological Organization Expert Team on Weather Modification Research (and its predecessor Panels).