What controls methanol emissions from grassland?



Emission of volatile organic compounds, including methanol (CH3OH), from plants can affect atmospheric chemistry and climate. Seasonal variations such as changes in leaf growth result in changes in atmospheric methanol concentrations.Hörtnagl et al. sought to test whether the controls on methanol fluxes reported from controlled laboratory experiments at the leaf level applied to in situ conditions at ecosystem scales. They measured methanol fluxes above a managed grassland in the Stubai Valley in Austria and studied controls on methanol exchange by analyzing half hourly and daily average data.