Surface-to-mountaintop transport characterised by radon observations at the Jungfraujoch
Item
Title (Dublin Core)
Surface-to-mountaintop transport characterised by radon observations at the Jungfraujoch
Description (Dublin Core)
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.
Creator (Dublin Core)
Griffiths, A. D.
Conen, F.
Weingartner, E.
Zimmermann, L.
Chambers, S. D.
Williams, A. G.
Steinbacher, M.
Date (Dublin Core)
2018-09-11
Type (Dublin Core)
Text
Format (Dublin Core)
application/pdf
Identifier (Dublin Core)
10.5194/acp-14-12763-2014
https://acp.copernicus.org/articles/14/12763/2014/
Source (Dublin Core)
eISSN: 1680-7324
Language (Dublin Core)
eng
