Surface-to-mountaintop transport characterised by radon observations at the Jungfraujoch
Alan D. Griffiths,Franz Conen,Ernest Weingartner,Lukas Zimmermann,Scott D. Chambers,Alastair G. Williams,Martin Steinbacher +6 more
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In this article, the authors quantify the land-surface influence at Jungfraujoch hour by hour and detect the presence of anabatic winds on a daily basis during 2010-2011, but only from April to September.Abstract:
. 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.read more
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Background Free‐Tropospheric Ice Nucleating Particle Concentrations at Mixed‐Phase Cloud Conditions
Larissa Lacher,Larissa Lacher,Paul J. DeMott,Ezra J. T. Levin,Kaitlyn J. Suski,Kaitlyn J. Suski,Yvonne Boose,Yvonne Boose,Assaf Zipori,Assaf Zipori,Erik Herrmann,Nicolas Bukowiecki,Martin Steinbacher,Ellen Gute,Jonathan P. D. Abbatt,Ulrike Lohmann,Zamin A. Kanji +16 more
TL;DR: In this paper, the authors quantify the number of ice nucleating particles (INPs) in the free troposphere (FT) as measured at the High Altitude Research Station Jungfraujoch (JFJ), during the winter, spring, and summer of the years 2014-2017.
Journal ArticleDOI
Characterization and source apportionment of organic aerosol using offline aerosol mass spectrometry
Kaspar R. Daellenbach,Carlo Bozzetti,Adéla Křepelová,Francesco Canonaco,Robert Wolf,Peter Zotter,Peter Zotter,Paola Fermo,Monica Crippa,Jay G. Slowik,Yulia Sosedova,Yan-Lin Zhang,Ru-Jin Huang,Laurent Poulain,Sönke Szidat,Urs Baltensperger,I. El Haddad,André S. H. Prévôt +17 more
TL;DR: In this paper, the water-soluble organic fingerprint of ambient particles collected onto conventional quartz filters, which are routinely sampled at many air quality sites, was applied to 256 particulate matter (PM) filter samples (PM1, PM2, and PM10) collected at 16 urban and rural sites during summer and winter.
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Bacterial Composition and Survival on Sahara Dust Particles Transported to the European Alps
TL;DR: The results show that bacteria survive and are metabolically active after the transport to the European Alps, and distinct differences in bacterial community composition and structure in SD-layers as compared to clean snow layers.
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Analysis of long‐term aerosol size distribution data from Jungfraujoch with emphasis on free tropospheric conditions, cloud influence, and air mass transport
Erik Herrmann,Ernest Weingartner,Stephan Henne,Laurent Vuilleumier,Nicolas Bukowiecki,Martin Steinbacher,Franz Conen,Martine Collaud Coen,Emanuel Hammer,Z. Jurányi,Urs Baltensperger,Martin Gysel +11 more
TL;DR: In this paper, six years of aerosol size distribution measurements between 20 and 600 nm diameters and total aerosol concentration above 10 µnm from March 2008 to February 2014 at the high-alpine site Jungfraujoch are presented.
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Atmospheric ice nuclei at the high-altitude observatory Jungfraujoch, Switzerland
Franz Conen,Sergio Rodríguez,Christoph Hüglin,Stephan Henne,Erik Herrmann,Nicolas Bukowiecki,Christine Alewell +6 more
TL;DR: In this article, the atmospheric abundance of particles active as ice nuclei at −8°C (IN −8 ) over the course of a year at the high-alpine station Jungfraujoch (3580 m.a.s.l., Switzerland) through the use of immersion freezing assays of particles collected on quartz micro-fibre filters.
References
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TL;DR: In this article, a 9-year aerosol record from the Jungfraujoch (3454 meters) on the northern side of the Swiss Alps and a 2.5-year record from Colle Gnifetti (4452 meters), was analyzed.
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Christoph Zellweger,J. Forrer,J. Forrer,Peter Hofer,S. Nyeki,S. Nyeki,B. Schwarzenbach,Ernest Weingartner,Markus Ammann,Urs Baltensperger +9 more
TL;DR: In this article, the results of continuous nitrogen oxide (NO), nitrogen dioxide (NO 2 ), peroxyacetyl nitrate (PAN) and total reactive nitrogen (NO y ) measurements along with seasonal field campaigns of nitric acid (HNO 3 ) and particulate nitrate(NO 3 - ) measurements are presented for a two-year period at the high-alpine research station Jungfraujoch (JFJ), 3580 m asl.
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Chemical composition of free tropospheric aerosol for PM1 and coarse mode at the high alpine site Jungfraujoch
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TL;DR: The chemical composition of submicron and supermicron (coarse mode) aerosol particles has been investigated at the Jungfraujoch high alpine research station (3580 m a.s.l., Switzerland) as part of the GAW aerosol monitoring program since 1999 as mentioned in this paper.
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Baseline radon detectors for shipboard use: Development and deployment in the First Aerosol Characterization Experiment (ACE 1)
S. Whittlestone,W. Zahorowski +1 more
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