Contemporary limnology of the rapidly changing glacierized watershed of the world's largest High Arctic lake.

ABSTRACT: Glacial runoff is predicted to increase in many parts of the Arctic with climate change, yet little is known about the biogeochemical impacts of meltwaters on downstream freshwater ecosystems. Here we document the contemporary limnology of the rapidly changing glacierized watershed of the world's largest High Arctic lake (Lake Hazen), where warming since 2007 has increased delivery of glacial meltwaters to the lake by up to 10-times. Annually, glacial meltwaters accounted for 62-98% of dissolved nutrient inputs to the lake, depending on the chemical species and year. Lake Hazen was a strong sink for NO₃^--NO₂^-, NH₄⁺ and DOC, but a source of DIC to its outflow the Ruggles River. Most nutrients entering Lake Hazen were, however

SUBMITTER: St Pierre KA 

PROVIDER: S-EPMC6418217 | biostudies-literature | 2019 Mar

REPOSITORIES: biostudies-literature