 |
| Titel |
Surface-to-mountaintop transport characterised by radon observations at the Jungfraujoch |
| VerfasserIn |
A. D. Griffiths, F. Conen, E. Weingärtner, L. Zimmermann, S. D. Chambers, A. G. Williams, M. Steinbacher |
| Medientyp |
Artikel
|
| Sprache |
Englisch
|
| ISSN |
1680-7316
|
| Digitales Dokument |
URL |
| Erschienen |
In: Atmospheric Chemistry and Physics ; 14, no. 23 ; Nr. 14, no. 23 (2014-12-05), S.12763-12779 |
| Datensatznummer |
250119207
|
| Publikation (Nr.) |
 copernicus.org/acp-14-12763-2014.pdf |
|
|
|
|
|
| Zusammenfassung |
| Atmospheric composition measurements at Jungfraujoch are affected
intermittently by boundary-layer air which is brought to the station by
processes including thermally driven (anabatic) mountain winds. Using
observations of radon-222, and a new objective analysis method, we quantify
the land-surface influence at Jungfraujoch hour by hour and detect the
presence of anabatic winds on a daily basis. During 2010–2011, anabatic
winds occurred on 40% of days, but only from April to September. Anabatic
wind days were associated with warmer air temperatures over a large fraction
of Europe and with a shift in air-mass properties, even when comparing days
with a similar mean radon concentration. Excluding days with anabatic winds,
however, did not lead to a better definition of the unperturbed aerosol
background than a definition based on radon alone. This implies that a radon
threshold reliably excludes local influences from both anabatic and
non-anabatic vertical-transport processes. |
| |
|
| Teil von |
|
|
|
|
|
|
|
|