Glacial weathering, sulfide oxidation, and global carbon cycle feedbacks.

ABSTRACT: Connections between glaciation, chemical weathering, and the global carbon cycle could steer the evolution of global climate over geologic time, but even the directionality of feedbacks in this system remain to be resolved. Here, we assemble a compilation of hydrochemical data from glacierized catchments, use this data to evaluate the dominant chemical reactions associated with glacial weathering, and explore the implications for long-term geochemical cycles. Weathering yields from catchments in our compilation are higher than the global average, which results, in part, from higher runoff in glaciated catchments. Our analysis supports the theory that glacial weathering is characterized predominantly by weathering of trace sulfide and carbonate minerals. To evaluate the effects of glacial w

SUBMITTER: Torres MA 

PROVIDER: S-EPMC5565423 | biostudies-literature | 2017 Aug

REPOSITORIES: biostudies-literature