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Keith Summey North Charleston Library
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Phone: (843) 744-2489
Folly Beach Library
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Main Library
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Phone: (843) 805-6930
West Ashley Library
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Wando Mount Pleasant Library
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Degrading permafrost river catchments and their impact on Arctic Ocean nearshore processes.
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- Author(s): Mann, Paul J.; Strauss, Jens; Palmtag, Juri; Dowdy, Kelsey; Ogneva, Olga; Fuchs, Matthias; Bedington, Michael; Torres, Ricardo; Polimene, Luca; Overduin, Paul; Mollenhauer, Gesine; Grosse, Guido; Rachold, Volker; Sobczak, William V.; Spencer, Robert G. M.; Juhls, Bennet
- Source:
AMBIO - A Journal of the Human Environment; Feb2022, Vol. 51 Issue 2, p439-455, 17p- Subject Terms:
- Source:
- Additional Information
- Subject Terms:
- Abstract: Arctic warming is causing ancient perennially frozen ground (permafrost) to thaw, resulting in ground collapse, and reshaping of landscapes. This threatens Arctic peoples' infrastructure, cultural sites, and land-based natural resources. Terrestrial permafrost thaw and ongoing intensification of hydrological cycles also enhance the amount and alter the type of organic carbon (OC) delivered from land to Arctic nearshore environments. These changes may affect coastal processes, food web dynamics and marine resources on which many traditional ways of life rely. Here, we examine how future projected increases in runoff and permafrost thaw from two permafrost-dominated Siberian watersheds—the Kolyma and Lena, may alter carbon turnover rates and OC distributions through river networks. We demonstrate that the unique composition of terrestrial permafrost-derived OC can cause significant increases to aquatic carbon degradation rates (20 to 60% faster rates with 1% permafrost OC). We compile results on aquatic OC degradation and examine how strengthening Arctic hydrological cycles may increase the connectivity between terrestrial landscapes and receiving nearshore ecosystems, with potential ramifications for coastal carbon budgets and ecosystem structure. To address the future challenges Arctic coastal communities will face, we argue that it will become essential to consider how nearshore ecosystems will respond to changing coastal inputs and identify how these may affect the resiliency and availability of essential food resources. [ABSTRACT FROM AUTHOR]
- Abstract: Copyright of AMBIO - A Journal of the Human Environment is the property of Springer Nature and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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