WMOD00284

• Applicant: Thompson, J.R., G.W. Wilderson, and D.A. Griffith, North American Weather Consultants
• Sponsor Name: USBR
• Title: Cloud Seeding Data Collection, and Analysis Assoc. with the Colo River Augmentation Demonstration Program
• Prepared For: USBR, Divison of Atmospheric Research
• Prepared By: Thompson, Wilderson, Griffith
• Date: 12/1/1987
• State: AZ
• Weather Modification - Doc Type: Scientific Study

3.0 DATA REDUCTION AND ANALYSES

Some quality control data reduction and preliminary analyses
were performed during the field season mainly to determine
that the instrumentation systems were operating properly.
However, most of the data reduction and analyses began after
the end of the field season. This was a joint effort between
~AWC and the Bureau with NAWC participating in supporting
the analysis effort as needed.

Analyses of the data collected on the project essentially
fell into three general areas of investigation. These were:

Case study analyses of the transport and diffusion studies.

Development of a preliminary winter storm climatology
for the Arizona Mogollon Rim.

Case study analyses of selected Arizona storms.

The Bureau has taken the lead in the latter two areas
with NAWC contributing to the development of the storm climatology
and doing most of the transport and dispersion analysis of
sulfur hexafluoride gas. It was used as a tracer to simulate
the release of ground based silver iodide seeding material.

The climatological and case study analyses, which involve
integrating the data acquired from a variety of meteorological
sensors (e.g., microwave radiometer, acoustical sounder, precipi-
tation gauges, radar and rawinsonde measurements) are being
done to refine understanding of winter storms and their precipi-
tation mechanisms in the Mogollon Rim region. Attempts will

3-1

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