Ozone and ozone precursors in the atmosphere of Chapel Hill, North Carolina

Conference · Fri Oct 15 04:00:00 EDT 1965 · J. Geophys. Res.; (United States)

OSTI ID:6432742

Ripperton, L A

Seventeen continuous 24-hour samples of ozone were obtained in the community air of Chapel Hill, NC. The readings were made over the period of a year with a Mast ozone meter. The over-all range was 0.0 to 13.0 pphm. The daily ranges varied from 0.0-0.1 to 6.4-13.0. Atmospheric sampling for a number of pollutants revealed the fact that the air of Chapel Hill was intermediate in cleanliness between rural and urban air. Ambient air was captured in three different systems, two glass and one Mylar, and irradiated with artificial light or sunlight. Of 29 samples, irradiation caused an apparent ozone synthesis in 25. Four of these cases were confirmed with a Regener oxyluminescent ozone meter. Of the 21 increases measured with the Mast ozone meter alone, 9 were greater than 1.2 pphm. The differential of 1.2 pphm was established as the confidence level of the Mast instrument by evaluation in this laboratory. 18 references, 3 figures, 6 tables.

• Research Organization: Univ. of North Carolina, Chapel Hill
• OSTI ID: 6432742
• Conference Information: Journal Name: J. Geophys. Res.; (United States) Journal Volume: 70:20
• Country of Publication: United States
• Language: English

Related Subjects

500200* -- Environment
Atmospheric-- Chemicals Monitoring & Transport-- (-1989)
54 ENVIRONMENTAL SCIENCES
AIR POLLUTION
AIR POLLUTION MONITORING
AIR POLLUTION MONITORS
DAILY VARIATIONS
DATA
ECOLOGICAL CONCENTRATION
ELECTROMAGNETIC RADIATION
EXPERIMENTAL DATA
FEDERAL REGION IV
INFORMATION
MEASURING INSTRUMENTS
MONITORS
NORTH AMERICA
NORTH CAROLINA
NUMERICAL DATA
OZONE
POLLUTION
PRECURSOR
RADIATIONS
RURAL AREAS
URBAN AREAS
USA
VARIATIONS
VISIBLE RADIATION