WMOD00276

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

.

ABSTRACT

il

The State of Utah Division of Water Resources (UDWR), with major

funding from and in cooperation with the National Oceanic and

Atmospheric Administration (NOAA), is conducting a weather modificcltion

field research program in the Tushar Mtns area of Utah near the town of

Beaver from 15 January to 15 March 1985. Involved with UDWR in the

field are seven subcontractor groups with appropriate instrumentation

and expertise. The research program is being conducted simultaneously

with the State of Utah operational snowpack augmentation project

although in a different part of the State. Objectives of the research

are 1) to assess the transport and delivery of seeding material from

ground-based generators to clouds over the Tushar Mtns, and 2) to

describe the spatial and temporal distribution of supercooled liquid

water in the clouds, the physical processes responsible for precipita-

tion development, and the trajectories of cloud and precipitation par-

ticles. These objectives are approached through the ancllysis and

interpretation of field data. Field data for the seeding material deli-

very studies come from tracing SF6 from potential ground generator sites

to locations near and on the Tushar Mtns slopes and from tracking of

constant volume balloons. Data for the cloud physics and kinematics

studies come from appropriately positioned remote sensing instrumen-

tation including two Doppler radars, a radiometer, and a Iidar, and from

ground based instrumentation for measuring supercooled liquid water and

precipitation particle characteristics. Supporting meteorological data

are also being gathered.

.

.

.

~

.

.

.

.

.

i i i