Particulate organic carbon composition and landscape characteristics in the Peel River Watershed, Canada

Kirsi Keskitalo, Niek Speetjens, Paul Overduin, Sebastian Westermann, Frederieke Miesner, Torsten Sachs, Ingmar Nitze, Lisa Bröder, Negar Haghipour, Timothy Eglinton, Jorien Vonk

Research output: Contribution to conferenceAbstract


Rapid warming of the Arctic is accelerating thaw of permafrost, which mobilizes organic carbon (OC). Remineralization of this carbon can contribute to further climate warming. The Peel River watershed is underlain by continuous and discontinuous permafrost and covers a diverse set of landscapes from wetlands to barren mountainous areas. Part of the watershed undergoes abrupt permafrost thaw that releases particulate OC (POC) to the fluvial system. In this study, we couple landscape characteristics to river POC to better understand its spatial variability and the changes imposed on the watershed by permafrost thaw. We sampled POC in July-August 2019 in the Peel River main stem and its tributaries (total n=~120) and used carbon isotopes and lipid biomarkers to characterize its composition and trace its sources. Our first results indicate a compositional diversity within the watershed as POC ranges between
Original languageEnglish
Number of pages1
Publication statusPublished - 25 Mar 2022
Externally publishedYes
EventEuropean Geosciences Union (EGU) General Assembly 2022 - Austria Center Vienna, Bruno-Kreisky-Platz 1, 1220, Vienna, Austria
Duration: 23 May 202227 May 2022


ConferenceEuropean Geosciences Union (EGU) General Assembly 2022
Abbreviated titleEGU22
Internet address

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