The Finnish Meteorological Institute is a leading expert in meteorology, air quality, climate change, earth observation, marine and arctic research areas.
FMI's researchers publish about 300 peer-reviewed articles annually.
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An in situ method for studying gas phase C2-C7 monocarboxylic volatile organic acids (VOAs) in ambient air has been developed and evaluated at the Finnish Meteorological Institute.
Organic acids comprise a large fraction of the non-methane hydrocarbons in the atmosphere, but knowledge of especially volatile organic acids is poor. This is at least partly due to the lack of sensitive enough measurement methods for detecting concentrations in ambient air. These acids potentially play a role in the atmospheric chemistry and production of secondary organic aerosols and therefore they have effects also on air quality and climate.
In this method samples are collected directly into the cold trap of the thermal desorption unit and analyzed in situ using a gas chromatograph coupled to a mass spectrometer. The method was validated in the laboratory and tested on the ambient air of a boreal forest in June 2015. The highest mixing ratios were found for acetic acid and the highest relative variations for hexanoic acid.
This novel method will allow us to study diurnal and seasonal variations of VOAs in ambient air and produce new data on, which will benefit atmospheric chemistry and new particle formation studies.
Academy Research fellow Heidi Hellén, email@example.com
Hellén, H., Schallhart, S., Praplan, A. P., Petäjä, T., and Hakola, H.: Using in situ GC-MS for analysis of C2–C7 volatile organic acids in ambient air of a boreal forest site, Atmos. Meas. Tech., 10, 281-289, doi:10.5194/amt-10-281-2017, 2017.
FMI researchers produce some 300 publications annually, the majority of them in international scientific journals. Research results are also published in FMI´ss own publications series. FMI`s own series are:
* FMI Contributions: high-quality peer-reviewed research results, mainly doctoral dissertations
* FMI Reports: current research results mainly for customers and other stakeholders
All publications from 2016 onwards can be found on Helda.