Lakes as nitrous oxide sources in the boreal landscape.

ABSTRACT: Estimates of regional and global freshwater N₂ O emissions have remained inaccurate due to scarce data and complexity of the multiple processes driving N₂ O fluxes the focus predominantly being on summer time measurements from emission hot spots, agricultural streams. Here, we present four-season data of N₂ O concentrations in the water columns of randomly selected boreal lakes covering a large variation in latitude, lake type, area, depth, water chemistry, and land use cover. Nitrate was the key driver for N₂ O dynamics, explaining as much as 78% of the variation of the seasonal mean N₂ O concentrations across all lakes. Nitrate concentrations varied among seasons being highest in winter and lowest in summer. Of the surface water samp

SUBMITTER: Kortelainen P 

PROVIDER: S-EPMC7078959 | biostudies-literature | 2020 Mar

REPOSITORIES: biostudies-literature