Spatio-temporal patterns of stream methane and carbon dioxide emissions in a hemiboreal catchment in Southwest Sweden.

ABSTRACT: Global stream and river greenhouse gas emissions seem to be as large as the oceanic C uptake. However, stream and river emissions are uncertain until both spatial and temporal variability have been quantified. Here we investigated in detail the stream CH₄ and CO₂ emissions within a hemiboreal catchment in Southwest Sweden primarily covered by coniferous forest. Gas transfer velocities (k₆₀₀), CH₄ and CO₂ concentrations were measured with multiple methods. Our data supported modelling approaches accounting for various stream slopes, water velocities and discharge. The results revealed large but partially predictable spatio-temporal variabilities in k₆₀₀, dissolved gas concentrations, and emissions. The variability in CO₂

SUBMITTER: Natchimuthu S 

PROVIDER: S-EPMC5206626 | biostudies-literature | 2017 Jan

REPOSITORIES: biostudies-literature