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Summary: Pergamon Atmospherrc Environment Vol. 30, No. 4, pp. 649-659, 1996
Copyright Q 1996 Elsevier Science Ltd
Printed in Great Britain. All rights resnvd
135%2310/96 $15.00 + 0.00
1352-2310(95)00294-A
MEASUREMENTS AND ANALYSIS OF REACTIVE NITROGEN
SPECIES IN THE RURAL TROPOSPHERE OF SOUTHEAST
UNITED STATES: SOUTHERN OXIDANT STUDY SITE SONIA
VINEY P. ANEJA,* DEUG-SO0 KIM, MITA DAS
and BENJAMIN E. HARTSELL
Department of Marine, Earth and Atmospheric Sciences, North Carolina State University, Raleigh,
NC 27695-8208, U.S.A.
(First received 18 March 1993 and infinalform 10 July 1995)
Abstract-Ambient concentrations of reactive nitrogen compounds as well as total NO, were measured
during June and early July 1992 at a rural site, site SONIA, in the central Piedmont region of North
Carolina as a part of the Southern Oxidants Study. The measurements of reactive nitrogen species were
made in an effort to provide a comprehensive understanding of nitrogen chemistry and to investigate the
total nitrogen budget at the site. NO, NO, and NO showed diurnal variations with maxima in the morning
between 0600 and 0900 EST. The maximum NO,, concentration reached was _ 14.5ppbv, and the
maximum concentrations of NO and NO, were 5.4 and 7.8 ppbv, respectively. The mean NO, mixing ratio
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