Dr. Cuiqi Zhang takes on new role as co-chair of the ACTRIS Early Career Investigators (ECI) Group

Several ACTRIS Switzerland members attended this year’s ACTRIS Week meeting in Evora, Portugal. ACTRIS Week is an important chance for the ACTRIS community to come together and share updates about recent and ongoing ACTRIS progress, projects, and challenges. At this year’s meeting ACTRIS Switzerland member Dr. Cuiqi Zhang took on…

ACTRIS ECI activity in Evora. Left: Aleksandra Rubin from University of Silesia in Katowice. Right: Cuiqi Zhang from ETH

Jungfraujoch Cloud in situ measurements achieve major ACTRIS labelling milestone

Following installation of the new fog monitor, the Jungfraujoch National Facility has been initially accepted for Cloud in situ measurements by the ACTRIS ERIC Director General on 6 October, 2025. From this date on, the instruments used and data provided by the facility are officially under the operation supported by…

The 6th Filter Radiometer Comparison campaign for Aerosol Optical Depth (AOD) measurements successfully held in Davos

The team at PMOD/WRC have had a busy month in Davos with the 6th Filter Radiometer Comparison campaign for Aerosol Optical Depth (AOD) measurements, which was held from 20 September to 10 October 2025. This campaign was organized by the PMOD/WRC and supported by the World Meteorological Organization. It was…

TOFWERK tests new instrument for measuring VOCs at Jungfraujoch

TOFWERK is a Swiss-based company that designs and manufacturers high-quality mass spectrometers for characterizing atmospheric composition. Recently, the company has developed a robust new instrument for monitoring VOCs (volatile organic compounds) in real time: the AirTox Monitor. Working in partnership with Dr. Stefan Reimann from Empa, TOFWERK is currently operating…

ETH Zürich Installs Fog Monitor at Jungfraujoch: A Milestone for ACTRIS Cloud In Situ Measurements in Switzerland

Researchers from Dr. Zamin Kanji’s research group at ETH Zürich including Dr. Cuiqi Zhang and Dr. Michael Rösch have  successfully installed and operated a fog monitor (Droplet Measurement Technologies; model FM-100) at the high-altitude research station Jungfraujoch (JFJ; 3580 m a.s.l., 46°33’ N, 7°59’ E), marking a major milestone in Switzerland’s contribution to…

Fig. 1 FM-100 with new design for ACTRIS-CH CIS measurement. Photo credit: Dr. Cuiqi Zhang

Hazy days in Switzerland

Despite the fine weather across Switzerland this week, many observers have noted the poor sky visibility and startling red sunsets. These are the effects of two atmospheric constituents that visited us from far away locations. Our first visitor arrived last weekend and stayed around for a few days: wildfire emissions…

Payerne National Facility receives a major new upgrade in cloud remote sensing

Last week saw a major step forward in observation by ACTRIS-Switzerland: a radar dedicated to the remote sensing of clouds in the atmosphere was installed by the University of Bern at the National Facility in Payerne, hosted by MeteoSwiss. This instrument of utmost importance will profile cloud structure with high…