High terrestrial carbon load via groundwater to a boreal lake dominated by surface water inflow

Main findings:
• Significant terrestrial load of DOC, DIC, and CH4 via groundwater to a boreal lake, even though most water enters via streams
• Terrestrial DIC load accounted for less than 12% of lake CO2 emission
• Terrestrial DOC was more prone to mineralization and flocculation than lake DOC