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

Experiment 3: Spatial and temporal distribution of supercooled
liquid water

Lead Scientist: Alexis B. Long, DRI

Participating Scientists:

Patricia A. Walsh, DRI
Jack B. Snider, WPL
Robert M. Rauber, CSU
Norihiko Fukuta, Kenneth Sassen, UU
Thomas J. Henderson, AI

Objectives of the analysis are 1) to describe the spatial distribu-

tion and temporal variation of supercooled liquid water in clouds in the

vicinity of the WPL radiometer and to relate this information to

orographic features of the Tushar Mtns, 2) to measure the height and

from this calculate the temperature of the liquid water in clouds above

the Iidar, and 3) to intercompare supercooled liquid water detector

data, surface microphysics observations, radiometer data, and Iidar

information on liquid water.

The analysis leading to the first objective will be based in part

on contoured plots of liquid water depth as a function of azimuth and

time for groups of radiometer azimuth scans made during important

segments of STORMS.

Interpretation of the plots will consider

orographic features, the direction and speed of ambient flow over the

mountains, and the convective or stratiform nature of the clouds.

Radiometer data collected in the elevation scan mode will also be ana-

Iyzed.

The data will first be normalized for slant path length of the

radiometer field of view.

Interpretations will then be made as to how

the liquid water amount varies with pos!~tion upwind and over the Tushar

Mtns. The radiometer data for individual STORMS will be appropriately

composited to yield a picture of the liquid water distribution for the

entire field program.

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