Field campaign January/February 2013 - Jungfraujoch
The field campaign "INUIT-JFJ" took place in January/February 2013 at the High Alpine Research Station Jungfraujoch (3580 m above sea level), in collaboration with three further projects: CLACE2013, INUPIAQ und NUCLACE.
The research station Jungfraujoch is well suited for cloud studies because of its location. Especially during the winter months the probability for ice clouds or mixed phase clouds is very high.
The focus of the measurements during INUIT-JFJ was on the selection and subsequent physico-chemical analysis (online and offline) of residuals from ice crystals that were directly sampled in the clouds. A second focus was on the activation of background aerosol particles to act as ice nuclei with subsequent analysis, again on- and offline. Both measurements were conducted as collaboration between the INUIT projects RP1, RP2, and RP8.
Furthermore, the ability of background aerosol particles and ice residuals to act as cloud condensation nuclei (CCN) was investigated, and aerosol samples using a high volume sampler were taken for DNA analysis of biological aerosol particles (INUIT RP9).
A large number of project partners (CLACE2013, INUPIAQ) facilitated the full characterization of the cloud properties. The universities of Manchester and Mainz, the ETH Zurich and the Karlsruhe Institute for Technology (KIT) employed various optical instruments that investigated the microphysical cloud properties (number, size, shape) outside the laboratory directly in the cloud. The Paul Scherrer Institute (PSI) and the KIT tested a new ice selective inlet (ISI) and employed a number of other instruments in the laboratory for the measurement of, e.g., number concentration, size distribution, and black carbon content of the aerosol particles and the ice residuals. Additionally to the INUIT ice nucleation chamber FINCH the ETH Zurich employed a second IN counter (PINC) such that comparative measurements between both self-built instruments were possible. A further single particle aerosol mass spectrometer (LAMPAS) was operated by the University Giessen.
Coincident to INUIT/CLACE the project NUCLACE was conducted at the Jungfraujoch station. NUCLACE investigated new particle formation (nucleation). Both research foci (ice formation and aerosol nucleation) will profit from an open data exchange.
More information about the field campaign you can find under http://www.mpic.de/forschung/partikelchemie/gruppe-schneider/projekte/inuit/inuit-jfj.html