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<br />. <br /> <br />. <br /> <br />The concentration data contain information on the duration and spa- <br /> <br />tial extent of the plume. The temporal data at anyone site depend to a <br />degree on the length of time the plume is in a region of precipitation <br />near that site and on the duration of the precipitation. The site-to- <br />site concentration data reveal how wide a plume may be. The temporal <br />and site-to-site concentrations when appropriately combin.ed together may <br />reveal the extent of meandering of the released plume. Information in <br />these areas is of practical importance. <br />The SF 6 concentration data will be related to other kinds of infor- <br />mation. Precipitation rate dlata may help in an assessment of how <br />measured SF 6 concentrations depend on the rate of scavenging by snow (or <br />rain). Rawinsonde data may be used in an attempt to explain how SF6 <br />concentrations depend on the presence of atmospheric inversions, on <br /> <br /> <br />instability, and on variability of wind with height. The SF 6 data may <br /> <br /> <br />also depend on the dominant PIETs present during individual experiments. <br /> <br />The constant volume balloon trajectories will be obtained at a <br /> <br /> <br />number of density altitudes over an extended part of the life of a STORM. <br /> <br /> <br />The trajectories may reveal vertical variations present in airflow <br /> <br />toward or around the Tushar Mtns. Variability of the airflow during a <br /> <br />STORM may also be revealed. It will be important to note how well the <br /> <br /> <br />Adamsville rawinsonde winds and winds derived from the balloon trajec- <br /> <br /> <br />tories agree. The analyses will incorporate information on inversions <br /> <br />above or below the balloon trcljectories, on instability, and on existing <br /> <br />PETs. <br /> <br /> <br />The NAWC GUIDE model will be upgraded and used to support these <br /> <br />studies. The model estimates plume transport. It should thus provide <br /> <br />information allowin9 some int(~9ration of the SF6 data and constant <br /> <br /> <br />volume balloon trajectories. <br /> <br />. <br /> <br />. <br /> <br />. <br /> <br />. <br /> <br />.----.. <br /> <br />. <br /> <br />. <br /> <br />. <br /> <br />. <br /> <br />1'7 <br />