WMOD00307

• Title: A Proposal for Cooperative Weather Research Between the Santa Barbara County Water Agency and the US Department of Interior Bureau of Reclaimation in the Context of the Weather Damage Modification Program through the State of CA 2002-2003 Winter Season
• Date: 10/17/2002
• State: CA
• Weather Modification - Doc Type: Report

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1.4 Statement of Work

SBCWA in conjunction with North American Weather Consultants (NAWC) and Weather
Modification Inc. (WMI), proposed sub-contractors on this research propose a two-phase
research program to be initiated with Phase I during the winter of 2002-2003. In phase I we
propose to do a sulfur-hexaflouride tracer study in which we release SF6 in convective bands
embedded within storms passing over Santa Barbara County and track the seeding plume from
release site to target and/or dispersion area. This will better educate us about seeding material
dispersions and plume migrations. We will also use the dedicated plume tracking plane for
complete cloud microphysics observation which will tell us about the processes that are taking
place in the convective band and if conditions are being met for production of additional rainfall
through the seeding methodologies employed. We will adapt a new WMI targeting and
dispersion computer model to the local terrain, and use the model to fine tune our seeding
operations and correlate observations made with the aircraft microphysics package.

The trace chemistry and cloud microphysics field work will be for a period of one month during
the 2002-2003 winter season. Depending on date of potential grant award and long range
forecasting provided by both the Climate Prediction Center and Pacific Weather Analysis, who is
the project's local forecaster, this 30-day research period will occur between January 15 and
March 15.

Phase II of the proposed research, contingent upon continued funding of the Weather Damage
Modification Program, will use trace chemistry to track treated precipitation to the ground in the
operational target area, the last link in the chain of events linking seeding to precipitation on the
ground. In addition, more complete analysis of the data set collected in Santa Barbara WDMP
Phase I will be in order. A complete overview of the work for this years proposed research
program is described in section 2.0

Weather Damage Modification Program 13

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