the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Long-term fluxes of carbonyl sulfide and their seasonality and interannual variability in a boreal forest
Timo Vesala
Kukka-Maaria Kohonen
Linda M. J. Kooijmans
Arnaud P. Praplan
Lenka Foltýnová
Pasi Kolari
Markku Kulmala
Jaana Bäck
David Nelson
Dan Yakir
Mark Zahniser
Ivan Mammarella
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Boreal rivers are significant sources of carbon dioxide (CO2) and methane (CH4) to the atmosphere but the controls of these emissions are uncertain. We measured four months of CO2 and CH4 exchange between a regulated boreal river and the atmosphere with eddy covariance. We found statistical relationships between the gas exchange and several environmental variables, the most important of which were dissolved CO2 partial pressure in water, wind speed, and water temperature.
Boreal rivers are significant sources of carbon dioxide (CO2) and methane (CH4) to the atmosphere but the controls of these emissions are uncertain. We measured four months of CO2 and CH4 exchange between a regulated boreal river and the atmosphere with eddy covariance. We found statistical relationships between the gas exchange and several environmental variables, the most important of which were dissolved CO2 partial pressure in water, wind speed, and water temperature.
We present a novel version of an aerosol number size distribution instrument, showcasing its capability to measure particle number concentration and particle number size distribution between 1 and 12 nm. Our results show that the instrument agrees well with existing instrumentation and allows for both the accurate measurement of the smallest particles and overlap with more conventional aerosol number size distribution instruments.