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Testing the daytime oxidizing capacity of the troposphere: 1994 OH field campaign at the Izaña Observatory, Tenerife
Title: Testing the daytime oxidizing capacity of the troposphere: 1994 OH field campaign at the Izaña Observatory, Tenerife
Authors: Armerding, W.Comes, F. J.Crawack, Hans JoachimForberich, O.Gold, G.Ruger, C.Spiekermann, M.Walter, J.Cuevas Agulló, Emilio ORCID RESEARCHERID SCOPUSID Autor AEMETRedondas, Alberto ORCID RESEARCHERID Autor AEMETSchmitt, RainerMatuska, P.
Keywords: Oxidizing capacity; Troposphere; Measurements; Ozone photolysis
Issue Date: 1997
Publisher: American Geophysical Union
Citation: Journal of Geophysical Research: Atmospheres. 1997, 102(D9), p. 10603–10611
Publisher version:
Abstract: A field campaign was carried out during May 1994 at the Izaña station, Tenerife. This campaign was part of the program Environment and Climate sponsored by the European Commission to study the influence of European emissions on the oxidizing capacity of a clean tropospheric environment. Daytime and also nighttime measurements were made, covering the OH as well as the NO3 chemistry. This paper presents the OH measurements taken with a multipass optical absorption spectrometer (MOAS) and discusses the daytime chemistry in a statistical and therefore more preliminary way. All relevant parameters influencing the OH concentration were monitored. From the data the two main contributions to the OH production can clearly be discerned and are given by the primary production following the ozone photolysis and the O(1D)-H2O reaction and by the catalytic reactions of NOx in the recycling process. The latter processes prove to contribute a dominant part to the OH concentration. The measurements of the nonmethane hydrocarbons (NMHC) especially of the biogenics, indicate a considerable influence of the NMHC on the absolute values of the OH concentration at Tenerife.
Sponsorship : This work has been financially supported by the European Commission (grant EV5V-CT93-0321), by the DFG, and by the Fonds der Chemischen Industrie, which is gratefully acknowledged.
ISSN: 2169-897X
Appears in Collections:Artículos científicos 1995-1999

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