3816f2a0-d3b6-4d17-9375-f4335f269b9c eng Ev-K2-CNR +39 035 3230511 +39 035 3230551 Via San Bernardino 145 Bergamo BG 24126 Italy metadata@evk2cnr.org http://www.evk2cnr.org/ 2012-02-27T18:38:09 ISO 19115:2003/19139 1.0 A climatology of 7Be at four high-altitude stations at the Alps and the Northern Apennines 2011-11-27T00:00:00 Atmos. Environ., 35, Pages 6347-6360,2001. 1352-2310 The 7Be activity concentrations measured from 1996 to 1998 at four high-altitude stations, Jungfraujoch—Switzerland, Zugspitze—Germany, Sonnblick—Austria and Mt. Cimone—Italy, were analyzed in combination with a set of, meteorological and atmospheric parameters such as the tropopause height, relative and specific humidity and also in conjunction with 3D back-trajectories in order to investigate the climatological features of 7Be. A frequency distribution analysis on 7Be activity concentrations revealed the existence of two concentration classes around 1.5 and 6 mBq m(-3) and a transition class between the two modes of the distribution at 3-4 mBq (m-3). Cross-correlation analysis performed between 7Be and a number of meteorological and atmospheric parameters at the first three stations showed a strong negative correlation with relative humidity (-0.56, -0.51,-0.41) indicating the importance of wet scavenging as a controlling mechanism. Also, the positive correlation with the height of 3-days back-trajectories and tropopause height (+0.49/+0.43, +0.59/+0.36, +0.44/+0.38) shows that downward transport from the upper or middle to lower troposphere within anticyclonic conditions plays also an important role. Trajectory statistics showed that low 7Be concentrations typically originate from lower-altitude subtropical ocean areas, while high concentrations arrive from the north and high altitudes, as is characteristic for stratospheric intrusions. Although the 7Be activity concentrations are highly episodic, the monthly means indicate an annual cycle with a late-summer maximum at all stations. The correlation coefficients calculated for monthly means of the 7Be and atmospheric data suggest that the main predictor controlling the seasonality of the 7Be concentrations is tropopause height (+0.76, +0.56, +0.60), reflecting more vertical transport from upper tropospheric levels into the lower troposphere during the warm season than during the cold season. Elsevier Science Publishing Company nlinfo@sciencedirect.com http://www.elsevier.com/wps/find/homepage.cws_home E. Gerasopoulos Nuclear Physics Department, Aristotle University of Thessaloniki, +30 31998202 +30 31998058 Thessaloniki 54006 Greece egera@skiathos.physics.auth.gr Prodromos Zanis Department of Meteorology and Climatology School of Geology, Faculty of Sciences Aristotle University of Thessaloniki +30 2310998240 +30 2310995392 Thessaloniki Greece zanis@geo.auth.gr zanis@auth.gr http://www.geo.auth.gr/ Andreas Stohl Department of Ecology, Technical University Munich, +49 8161714742 +49 8161714753 Am Hochanger 13 Freising-Weihenstephan D-85354 Germany stohl@forst.tu-muenchen.de www.forst.tu-muenchen.de C.S. Zerefos Laboratory of Atmospheric Physics, Aristotle University of Thessaloniki +30 310998041 +30 310283752 Thessalonik GR-54006 Greece zerefos@auth.gr http://www.auth.gr/ C. Papastefanou Nuclear Physics Department, Aristotle University of Thessaloniki +30 2310998005 +30 2310998058 GR-54006 Greece papastefanou@physics.auth.gr www.physics.auth.gr/ Wolfgang Ringer Federal Office of Agrobiology +43 7327750920 +43 7327750924 Derfflingerstr. 2, Linz A-4020 Austria wringer@balulinz.gv.at http://arcas.nuclear.ntua.gr/arcas/ L. Tobler Paul Scherrer Institute +41 0563104117 +41 0563104220 Villigen 5232 Switzerland leonhard.tobler@psi.ch http://lch.web.psi.ch/ S. Hubener Department of Chemistry and Biochemistry, University of Bern, Freiestrasse 3 Bern CH-3012 Switzerland http://www.ub.unibe.ch/ H.W. Gaggeler Paul Scherrer Institute;Department of Chemistry and Biochemistry, University of Bern, Freiestrasse 3 Bern CH-3012 Switzerland http://lch.web.psi.ch/ Andreas Tuerler Paul Scherrer Institute;University of Berne +41 0563102404 +41 0316314264 +41 0563104435 +41 0316313993 Freiestr. 3 Bern CH-3012 Switzerland andreas.tuerler@psi.ch andreas.tuerler@iac.unibe.ch http://lch.web.psi.ch/ H.J. Kanter Fraunhofer Institute for Atmospheric Environmental Research (IFU), Garmisch-Partenkirchen D-82467 Germany imk-ifu.fzk.de https://geoportal.mountaingenius.org/geonetwork/srv/eng/resources.get?uuid=3816f2a0-d3b6-4d17-9375-f4335f269b9c&fname=mountain_witness__s.png thumbnail png SHARE 7 Be Surface ozone Climatology Stratospheric intrusions Alps eng climatologyMeteorologyAtmosphere -11.5 43.2 35.3 81.4 http://www.sciencedirect.com/science/article/pii/S1352231001004009 WWW:LINK-1.0-http--partners Abstract:"A climatology of 7Be at four high-altitude stations at the Alps and the Northern Apennines". https://geoportal.mountaingenius.org/webapp/srv/en/resources.get?id=37663&fname=40.pdf&access=private WWW:DOWNLOAD-1.0-http--download 40.pdf Full Text(pdf):"A climatology of 7Be at four high-altitude stations at the Alps and the Northern Apennines" “A climatology of 7Be at four high-altitude stations at the Alps and the Northern Apennines “ Gerasopoulos, E., Zanis, P., Stohl, A., Zerefos, C. S., Papastefanou, C., Ringerd, W., Tobler, L., Hubener, S., Gaeggler, H. W., Kanter, H. J., Tositti, L., Sandrini, S. : A climatology of 7Be at four high-altitude stations at the Alps and the Northern Apennines, Atmos. Environ., 35, Pages 6347-6360,2001.