The behavior of some organic nitrates at Boulder and Niwot Ridge, Colorado
- National Center for Atmospheric Research, Boulder, CO (USA)
- NOAA Aeronomy Lab., Boulder, CO (USA)
- Washington State Univ., Pullman (USA)
Observations show that the ratio of peroxypropionyl nitrate (PPN) to peroxyacetyl nitrate (PAN) increases to a maximum in the afternoon period at Boulder and at Niwot Ridge. In Boulder air and in easterly flow reaching Niwot Ridge, maximum average PPN/PAN ratios were near 15%, while in westerly flow or more remote continental air, the ratio was much smaller and averaged 4%. Relative to the PAN-mixing ratios, methyl nitrate (MN) was less than 0.2% in the afternoon and less than 0.9% at night in Boulder air masses. The sum of ambient n-propyl nitrate (NPN) and 2-butyl nitrate (2BN) mixing ratios was also small, the diurnal average at Niwot Ridge being about 2% of the PAN-mixing ratio. The diurnal average contribution of MN + PPN + (NPN+2BN) to the total odd nitrogen budget at Niwot Ridge was at most 4%, leaving a 21-27% shortfall between the sum of individual measurements of odd nitrogen species and the total odd nitrogen (NO{sub y}) measurement.
- OSTI ID:
- 6104176
- Journal Information:
- Journal of Geophysical Research; (USA), Journal Name: Journal of Geophysical Research; (USA) Vol. 95:D9; ISSN 0148-0227; ISSN JGREA
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
540120* -- Environment
Atmospheric-- Chemicals Monitoring & Transport-- (1990-)
AIR POLLUTION
ATMOSPHERIC CHEMISTRY
CHALCOGENIDES
CHEMISTRY
COLORADO
DAILY VARIATIONS
ECOLOGICAL CONCENTRATION
ESTERS
FEDERAL REGION VIII
NITRATES
NITRIC ACID ESTERS
NITROGEN COMPOUNDS
NITROGEN OXIDES
NORTH AMERICA
ORGANIC COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
PEROXYACETYL NITRATE
POLLUTION
QUANTITY RATIO
USA
VARIATIONS