Laserfiche WebLink
<br />e <br /> <br />e <br /> <br />- <br /> <br />.. <br /> <br />sufficient for detecting the light py'ecipitation rates expected from <br />these SCPP-1 clouds. It is felt that :3 to 4 years will be required for <br />a statistically meaningful result to em,erge from precipitation intensity <br />and duration response variables. <br /> <br />6. There were a number of suspensions during exce11 ent SCPP-1 condi- <br />tions. Some 50 percent of the 10 SCPP-1 cases were nonrandomized and <br />not seeded due to flood potential or low elevation snow conditions. <br />There is no way to determine if such a percentage of suspensions is <br />realistic for an entire experiment. It is likely that the percentage is <br />higher than normal. No adj ustments to the suspension criteri a are <br />p1 anned . <br /> <br />7. Very promising results have been obtained from seeding the oro- <br />graphic cloud with dry ice. There is l~vidence in one case for a signa- <br />ture in both the radar data and from thle ground-based microphysics data; <br />It is unlikely that such seeding of the orographic cloud will have a <br />strong signature in the aircraft microphysics data due to higher back- <br />ground concentrations of ice crystals. <br /> <br />8. Seeding with silveriodide'AgI f1alres far upwind of the barrier in <br />orographic cloud situations has shown that large scale diffusion in such <br />conditions is quite slow, perhaps so slow that this seeding technique <br />is not appropriate for this portion of Sierra storms. The AgI curtains <br />released far upwind act as excellent tracers. In one case, individual <br />curtains were tracked for some 7 hours after seeding. <br /> <br />9. The 1981-82 season for bands was somewhat disappointing. No <br />actual seeding of a band was possible although some very interesting <br /> <br />1-17 <br />