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<br />Griffith, D. A., G. W. Wilkerson, W. J. Hauze, and D. A. Risch, 1992: Observations of ground.,released sulfur
<br />hexafluoride tracer gas plumes in two Utah winter stonns. Journal of Weather Modification, 24:49-65.
<br />
<br />Research was conducted for a two-month period over the Wasatch Plateau of central Utah during the
<br />winter of 1990-91. A portion of this research was devoted to tracking sulfur hexafluoride (SF6) released
<br />from various ground-based locations during winter stonns. A NOAA King Air research aircraft was the
<br />primary mode of tracking the SF6. Seven flights were conducted under IFR conditions when SF6 was
<br />released from a foothill or valley location. SF6 was detected on six of these flights. Infonnation on SF6
<br />plume widths, concentrations, vertical extent, and estimated numbers of ice crystals that would be
<br />possible if a silver iodide generator had been operated from the SF6 release site are provided for two of
<br />these flights.
<br />
<br />Griffith, D. A., G. W. Wilkerson, and D. A. Risch, 1990: Airborne observations of a summertime, ground-based
<br />tracer gas release. Journal of Weather Modification, 22:43-48.
<br />
<br />Two research aircraft were equipped with real-time sllllfur hexafluoride analyzers in support of the
<br />North Dakota/NOAA 1987 summertime weather mod.ification research program. Sulfur hexafluoride
<br />(SF6) was released from a ground location and the plume was detected by both aircraft on several
<br />downwind transects. The SF6 plume was tracked to lIlear the base of a developing thunderstonn by one
<br />of the research aircraft. Calculations were made of what the concentration of silver iodide (AgI)
<br />seeding material would have been had a seeding generator been operated concurrently with the SF6
<br />release. These calculations utilized the SF6 release rate, an assumed AgI release rate, and the observed
<br />SF6 concentrations.
<br />
<br />Griffith, D. A., H. R. Swart, and G. W. Wilkerson, 1988: Transport and diffusion in complex terrain as depicted
<br />by winter tracer programs. Preprints, 8th Symposium on Turbulence and Diffusion, San Diego, CA,
<br />April 25-29, 1988. American Meteorological Society, Boston, MA, 384-387.
<br />
<br />No abstract.
<br />
<br />Griffith, D. A., H. R. Swart, and G. W. Wilkerson, 1988: Transport and dispersion in complex terrain as
<br />depicted by winter tracer programs. Preprints, 81st ~illnual Air Pollution Control Association (APCA)
<br />Meeting, Dallas, TX, June 20-24, 1988, Paper no. 88,49.3.
<br />
<br />No abstract.
<br />
<br />Griffith, D. A., R. L. Benner, and J. L. Stith, 1986: In-cloud plume tracking in North Dakota. Preprints,
<br />10th Conference on Planned and Inadvertent Weather Modification, Arlington, V A, May 27-30, 1986.
<br />American Meteorological Society, Boston, MA, 248-252.
<br />
<br />No abstract.
<br />
<br />Griffith, D. A., 1985: Utilization of sulfur hexafluoride gas as a tracer in a summer cloud seeding experiment.
<br />Proceedings, 4th WMO Scientific Conference on Weather Modification, A Joint WMO/lAMAP
<br />Symposium, Honolulu, HI, August 12-14, 1985. Wodd Meteorological Organization, Geneva,
<br />WMO{I'D-No. 53, 255-260.
<br />
<br />No abstract.
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