Abstract
The representativeness of the monitoring station at L1. Valby, Denmark, has been tested. Furthermore, the relation of gaseous NOy and O-3 is investigated. From the linear orthogonal regression analyses of Ox (sum of O-3+NO2) and other photochemical products measured at L1. Valby Denmark and from literature results it is estimated that the non-photochemical background mixing ratio of O-3 in the Northern Hemisphere is 24+/-6 ppbv. The correlation of HCOOH and CH3COOH with Ox indicates that these acids are of photochemical origin. A high correlation of HNO3 with Ox is also found. The anti-correlation of O-3 with MSA observed in this study (methane sulphonic acid) indicates that O-3 at L1. Valby, Denmark, is produced by emissions from land sources. Finally, evidence is found that NO3 reactions is only a supplementary source of unidentified nitrogen species in the troposphere. Copyright (C) 1996 Elsevier Science Ltd.
Original language | English |
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Journal | Atmospheric Environment |
Volume | 31 |
Issue number | 5 |
Pages (from-to) | 685-691 |
ISSN | 1352-2310 |
DOIs | |
Publication status | Published - 1997 |