High-quality research is utilized to develop services to benefit our everyday life. Visible examples are improvement of weather forecasts, development of new expert and warning services as well as applications of the newest research results.
FMI's researchers publish about 300 peer-reviewed articles annually.
In Science News we publish current information about FMI's studies on the weather, the sea and the climate.
FMI implements method that improves current understanding of air chemistry in boreal forests, which will help to improve predictions of global climate models in the future.
The instrument based on the Comparative Reactivity Method (CRM) was originally developed at the Max Planck Institute for Chemistry in Germany. This new instrument has now been build and characterized in FMI´s laboratory. With the instrument long-term studies in the boreal forest will be conducted to investigate in detail what are the unknown chemical compounds in the air of boreal forests and what are their origins.
The instrument was tested in the vicinity of the Finnish Meteorological Institute in Helsinki. The test took place in February 2016. This first test showed that emissions from traffic dominated the air chemistry during that period.
The method allows measurements of the total hydroxyl radical (OH) reactivity. OH is the most important oxidant in the atmosphere. "OH reactivity, also called OH loss rate, is defined as the inverse of the OH lifetime, i.e. how long OH remains in the atmosphere before reacting with other compounds", explains researcher Arnaud Praplan.
Therefore, OH reactivity measurements reveal how much of reactive compounds are present in the air. A higher amount means a higher reactivity and a reduced OH lifetime. Studies found that total OH reactivity values in forests can be high, despite low pollution levels. However, the reactivity cannot be explained by the known compounds emitted by vegetation.
Arnaud Praplan, firstname.lastname@example.org
Praplan, A. P.; Pfannerstill, E. Y.; Williams, J. & Hellén, H. OH reactivity of the urban air in Helsinki, Finland, during winter, Atmos. Environ., 2017, 169, 150 - 161, doi: 10.1016/j.atmosenv.2017.09.013.
Scientific Director Ari Laaksonen
tel. +358 539 5530
Meteorological and Marine Research Programme
Director Sami Niemelä
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Climate Research Programme
Director Hannele Korhonen
tel. +358 29 539 2135
Space and Earth Observation Centre
Director Jouni Pulliainen
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FMI´s own publications series are:
All publications from 2016 onwards can be found on Helda.