Natural Mechanism of Atmospheric Carbon Absorption by River Runoff

Abstract: This study explores the role of continental runoff, particularly in high-latitude river systems, as a significant mechanism for long-term carbon sequestration. The research highlights the unique interplay between water's capacity to dissolve CO2, temperature gradients in northern rivers flowing into colder oceans, and hydrological processes facilitated by taiga and boreal forests. The findings suggest that these river systems facilitate a carbon removal rate of approximately 3.5-2.4 GtC/year, exceeding several prior estimates. This work contributes to a better understanding of global carbon budgets and informs strategies for managing carbon sinks.