the Creative Commons Attribution 3.0 License.
the Creative Commons Attribution 3.0 License.
Soil concentrations and soil–atmosphere exchange of alkylamines in a boreal Scots pine forest
Antti-Jussi Kieloaho
Mari Pihlatie
Samuli Launiainen
Markku Kulmala
Marja-Liisa Riekkola
Jevgeni Parshintsev
Ivan Mammarella
Timo Vesala
Jussi Heinonsalo
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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.
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.
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main playersin the formation of tropospheric O3 and secondary aerosols, which have a significant impact on climate, human health and crops. A complex mixture of VOCs, formed as a result of physicochemical and biological processes, is released into the atmosphere from the forest floor. This review presents data on the composition of VOCs and contribution of various processes to their emissions.