Magnitude and Origin of CO ₂ Evasion From High‐Latitude Lakes

Lakes evade significant amounts of carbon dioxide (CO2) to the atmosphere; yet magnitude and origin evasion are still poorly constrained. We quantified annual CO2 its (in-lake net ecosystem production vs. lateral inputs from terrestrial ecosystems) in 14 high-latitude lakes through high-frequency estimates open water flux metabolism inorganic mass-balance before after ice breakup. Annual ranged 1 25 g C m−2 yr−1 which an average 57% was evaded over a short period at ice-breakup. internal −6 21 yr−1, least half produced winter. The contribution versus external source varied between lakes, ranging fully with most having 75% sustained single source. Overall, study stresses large variability control suggests that environmental change impacts on not uniform.