WMOD00275

• Contract/Permit #: 85-5071
• Title: Cooperative Weather Modification Research Program - 1985 Analysis Plan
• Date: 1/1/1985
• State: UT
• Weather Modification - Doc Type: Report

2. Research objectives and experimental approach

The. objectives of the research program are to increase our

understanding of 1) the delivery of seeding material to the clouds over

the Tushar Mtns, and 2) the physics and kinematics of these clouds.

Several experiments have been devised in order to reach these objectives.

An increased understanding of the delivery of seeding materials

will be achieved with the following two experiments.

First, sulfur

hexafluoride (SF6) tracer material will be released from ground loca-

tions upwind of the Tushar Mtns, and it will be sampled at surface sites

near and on the mountains.

Second, constant volume balloons will be

released from the same upwind sites and tracked as they move toward the

Tushar Mtns (or in other directions). Supporting rawinsonde data will

be gathered during both experiments. The information acquired in these

experiments will be examined and conclusions drawn as to the effects of

wind and atmospheric structure on the delivery of seeding material that

would have been likely had there been seeding.

The physics and kinematics of winter clouds over the Tushar Mtns

will be examined through several different but related experiments:

Experiment 1: Mesoscale atmospheric kinematics. The mesoscale airflow

at different levels toward, around, and over the west

side of the Tushar Mtns will be described in order to

establish the kinematic context on this scale of cloud

formation and precipitation development.

Experiment 2: Kinematics of the particle growth environment.

Estimates

will be made of the rate of lift of air over the Tushar

Mtns and of the velocities of particles as they blow

across the mountains. From these results estimates will

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