WMOD00568

• Project Name: Snowater
• Title: Snow Water Augmentation for the Eastern Slopes of the Rockies - Stage I: Technology Adaptation
• Date: 6/1/1986
• Weather Modification - Doc Type: Report

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satellite imagery.

Dual-channel microwave radiometer - to determine the amount of
precipitable water vapor end supercooled cloud liquid water in
the atmosphere continuously in real-time. This capability is
critical to the identification of seeding opportunities.
Notably, this state of the art system cannot be obtained Hoff
the shelf" and lead time of 12 to 18 months is necessary before
it can be deployed in the field.

~band vertically Dointino Dooolerized ,radar - this system
would provide continuous remote measurement of cloud droplets
and hydrometeors. It assists the interpretation of the
microwave radiometer data.

Ice crystal measurement Drobe - a laser-based instrument that
gives a two-dimensional image of snowflake and ice particles.
It would be used to confirm the presence of supercooled cloud
liquid water by permitting estimates of crystal riming. These
measurements would be made at the radiometer/Ka-band radar site
to monitor the evolution of the microphysical characteristics
in seeded and un seeded precipitation.

2.4.1.2 Seeding Delivery System

Once a seeding opportunity has been identified additional systems are
required to deliver the seeding material to the designated targets.
The following constitute the proposed Seeding Delivery System to be
adapted to Alberta:

Seeder aircraft
dry ice.

to seed test clouds using pyrotechnics and

Automatic ground-based silver-iodide oenerators - to generate
seeding material for transport to orographic clouds over the
target area. A communication network for remote control of
these seeding delivery systems will be necessary. Monitoring
equipment would be used to assess operational reliability of
these generators.

Portable UDDer air observino stations to determine
cross-barrier winds and transport time from delivery systems to
target area. Sufficient time must be available for ice nuclei
to grow to snowflakes and then fallout of cloud into the
target area. This network would also measure temperature and
indicate occasions when cloud tops are warmer than -20De,
another criteria for seeding opportunity.

Dooolerized weather radar - to measure clouds, snow and winds
for the study of weather systems andtargetting of seeding
material.

2.4.1.3 Physical Effects Measurement System

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