 |
| Titel |
Peroxy radicals in the summer free troposphere: seasonality and potential for heterogeneous loss |
| VerfasserIn |
A. E. Parker, P. S. Monks, K. P. Wyche, J. M. Balzani-Lööv, J. Staehelin, S. Reimann, G. Legreid, M. K. Vollmer, M. Steinbacher |
| Medientyp |
Artikel
|
| Sprache |
Englisch
|
| ISSN |
1680-7316
|
| Digitales Dokument |
URL |
| Erschienen |
In: Atmospheric Chemistry and Physics ; 9, no. 6 ; Nr. 9, no. 6 (2009-03-20), S.1989-2006 |
| Datensatznummer |
250007089
|
| Publikation (Nr.) |
 copernicus.org/acp-9-1989-2009.pdf |
|
|
|
|
|
| Zusammenfassung |
| The sum of peroxy radicals (HO2+ΣiRiO2) and supporting
trace gases were measured on the Jungfraujoch (3580 m a.s.l.) during the late
summer of 2005. The period was marked by extended times of heavy snow which
led to reduction in the observed peroxy radicals during the snowy periods
that was greater than the concomitant reduction in j(O1D). In the limit
a first order loss rate of 0.0063 s−1 can be derived for the peroxy
radical loss in the snowy conditions that could be potentially ascribed to a
heterogenous loss process. On snow free days photolysis of HCHO is shown to
be a significant peroxy radical source. The seasonal trends of the peroxy
radical concentrations have been mapped from the winter to summer transition
in line with previous experiments. Net ozone production in late summer at
the Jungfraujoch was net neutral to marginally ozone destructive. A value of
28±4 pptv is calculated for the ozone compensation point for the snow
free days. |
| |
|
| Teil von |
|
|
|
|
|
|
|
|