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Project at a Glance

Project Status: complete

Title: SCAQS meteorological support program

Principal Investigator / Author(s): Lehrman, Don

Contractor: Technical & Business Systems, Inc.

Contract Number: a6-097-32

Research Program Area: Atmospheric Processes


During the summer and fall of 1987, the Southern California Air Quality Study (SCAQS) was conducted to develop a comprehensive air quality and meteorological database for the South Coast Air Basin (SCAB). Extensive measurements of gaseous and particulate pollutants, atmospheric tracers, and meteorological conditions were made on seventeen select days. Technical and Business Systems (T & B Systems) established a network consisting of upper-air and surface sites designed to augment the existing meteorological resources in the SCAB.

The network was comprised of six upper-air sites and three surface sites during the summer study and five upper-air and two surface sites during the fall study. The upper-air measurements consisted of temperature, humidity, wind speed and direction as a function of height to 10,000 feet or more. Typically soundings were taken six times daily at 0500, 0800, 1100, 1400, 1700, and 2200 local time. A total of 386 atmospheric soundings were made during the summer and 212 during the fall study. Plots and tabular listings of the upper-air data are contained under separate covers from this report in two appendices.

Although existing surface meteorological coverage is unusually complete in the SCAB, T & B Systems installed and operated weather stations in the few areas where coverage was inadequate. Three sites were established in the summer study and two sites in the fall study. Hourly averaged temperature and wind speed and direction from these sites are tabulated herein.

Both the surface and the upper-air data are available as computer files on MS-DOS formatted diskettes.


For questions regarding this research project, including available data and progress status, contact: Heather Choi at (916) 322-3893

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