Sedimentary and geochemical characteristics of two small permafrost-dominated Arctic river deltas in northern Alaska
Arctic river deltas are highly dynamic environments in the northern circumpolar permafrost region that are affected by fluvial, coastal, and permafrost-thaw processes. They are characterized by thick sediment deposits containing large but poorly constrained amounts of frozen organic carbon and nitro...
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ftawi:oai:epic.awi.de:48027 2024-09-15T17:50:14+00:00 Sedimentary and geochemical characteristics of two small permafrost-dominated Arctic river deltas in northern Alaska Fuchs, Matthias Grosse, Guido Jones, Benjamin M. Strauss, Jens Baughman, Carson A. Walker, Donald A. 2018 https://epic.awi.de/id/eprint/48027/ https://hdl.handle.net/10013/epic.aaca16c8-2d0e-408f-8a46-5bbec5df1c9c unknown Springer International Publishing Fuchs, M. orcid:0000-0003-3529-8284 , Grosse, G. orcid:0000-0001-5895-2141 , Jones, B. M. , Strauss, J. orcid:0000-0003-4678-4982 , Baughman, C. A. and Walker, D. A. (2018) Sedimentary and geochemical characteristics of two small permafrost-dominated Arctic river deltas in northern Alaska , arktos - The Journal of Arctic Geosciences, 4 (20) . doi:10.1007/s41063-018-0056-9 <https://doi.org/10.1007/s41063-018-0056-9> , hdl:10013/epic.aaca16c8-2d0e-408f-8a46-5bbec5df1c9c info:eu-repo/semantics/openAccess EPIC3arktos - The Journal of Arctic Geosciences, Springer International Publishing, 4(20), ISSN: 2364-9461 Article isiRev info:eu-repo/semantics/article 2018 ftawi https://doi.org/10.1007/s41063-018-0056-9 2024-06-24T04:21:00Z Arctic river deltas are highly dynamic environments in the northern circumpolar permafrost region that are affected by fluvial, coastal, and permafrost-thaw processes. They are characterized by thick sediment deposits containing large but poorly constrained amounts of frozen organic carbon and nitrogen. This study presents new data on soil organic carbon and nitrogen storage as well as accumulation rates from the Ikpikpuk and Fish Creek river deltas, two small, permafrost-dominated Arctic river deltas on the Arctic Coastal Plain of northern Alaska. A soil organic carbon storage of 42.4 ± 1.6 and 37.9 ± 3.5 kg C m− 2 and soil nitrogen storage of 2.1 ± 0.1 and 2.0 ± 0.2 kg N m− 2 was found for the first 2 m of soil for the Ikpikpuk and Fish Creek river delta, respectively. While the upper meter of soil contains 3.57 Tg C, substantial amounts of carbon (3.09 Tg C or 46%) are also stored within the second meter of soil (100–200 cm) in the two deltas. An increasing and inhomogeneous distribution of C with depth is indicative of the dominance of deltaic depositional rather than soil forming processes for soil organic carbon storage. Largely, mid- to late Holocene radiocarbon dates in our cores suggest different carbon accumulation rates for the two deltas for the last 2000 years. Rates up to 28 g C m− 2 year− 1 for the Ikpikpuk river delta are about twice as high as for the Fish Creek river delta. With this study, we highlight the importance of including these highly dynamic permafrost environments in future permafrost carbon estimations. Article in Journal/Newspaper Arctic permafrost Alaska Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) arktos 4 1 1 18 |
institution |
Open Polar |
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Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) |
op_collection_id |
ftawi |
language |
unknown |
description |
Arctic river deltas are highly dynamic environments in the northern circumpolar permafrost region that are affected by fluvial, coastal, and permafrost-thaw processes. They are characterized by thick sediment deposits containing large but poorly constrained amounts of frozen organic carbon and nitrogen. This study presents new data on soil organic carbon and nitrogen storage as well as accumulation rates from the Ikpikpuk and Fish Creek river deltas, two small, permafrost-dominated Arctic river deltas on the Arctic Coastal Plain of northern Alaska. A soil organic carbon storage of 42.4 ± 1.6 and 37.9 ± 3.5 kg C m− 2 and soil nitrogen storage of 2.1 ± 0.1 and 2.0 ± 0.2 kg N m− 2 was found for the first 2 m of soil for the Ikpikpuk and Fish Creek river delta, respectively. While the upper meter of soil contains 3.57 Tg C, substantial amounts of carbon (3.09 Tg C or 46%) are also stored within the second meter of soil (100–200 cm) in the two deltas. An increasing and inhomogeneous distribution of C with depth is indicative of the dominance of deltaic depositional rather than soil forming processes for soil organic carbon storage. Largely, mid- to late Holocene radiocarbon dates in our cores suggest different carbon accumulation rates for the two deltas for the last 2000 years. Rates up to 28 g C m− 2 year− 1 for the Ikpikpuk river delta are about twice as high as for the Fish Creek river delta. With this study, we highlight the importance of including these highly dynamic permafrost environments in future permafrost carbon estimations. |
format |
Article in Journal/Newspaper |
author |
Fuchs, Matthias Grosse, Guido Jones, Benjamin M. Strauss, Jens Baughman, Carson A. Walker, Donald A. |
spellingShingle |
Fuchs, Matthias Grosse, Guido Jones, Benjamin M. Strauss, Jens Baughman, Carson A. Walker, Donald A. Sedimentary and geochemical characteristics of two small permafrost-dominated Arctic river deltas in northern Alaska |
author_facet |
Fuchs, Matthias Grosse, Guido Jones, Benjamin M. Strauss, Jens Baughman, Carson A. Walker, Donald A. |
author_sort |
Fuchs, Matthias |
title |
Sedimentary and geochemical characteristics of two small permafrost-dominated Arctic river deltas in northern Alaska |
title_short |
Sedimentary and geochemical characteristics of two small permafrost-dominated Arctic river deltas in northern Alaska |
title_full |
Sedimentary and geochemical characteristics of two small permafrost-dominated Arctic river deltas in northern Alaska |
title_fullStr |
Sedimentary and geochemical characteristics of two small permafrost-dominated Arctic river deltas in northern Alaska |
title_full_unstemmed |
Sedimentary and geochemical characteristics of two small permafrost-dominated Arctic river deltas in northern Alaska |
title_sort |
sedimentary and geochemical characteristics of two small permafrost-dominated arctic river deltas in northern alaska |
publisher |
Springer International Publishing |
publishDate |
2018 |
url |
https://epic.awi.de/id/eprint/48027/ https://hdl.handle.net/10013/epic.aaca16c8-2d0e-408f-8a46-5bbec5df1c9c |
genre |
Arctic permafrost Alaska |
genre_facet |
Arctic permafrost Alaska |
op_source |
EPIC3arktos - The Journal of Arctic Geosciences, Springer International Publishing, 4(20), ISSN: 2364-9461 |
op_relation |
Fuchs, M. orcid:0000-0003-3529-8284 , Grosse, G. orcid:0000-0001-5895-2141 , Jones, B. M. , Strauss, J. orcid:0000-0003-4678-4982 , Baughman, C. A. and Walker, D. A. (2018) Sedimentary and geochemical characteristics of two small permafrost-dominated Arctic river deltas in northern Alaska , arktos - The Journal of Arctic Geosciences, 4 (20) . doi:10.1007/s41063-018-0056-9 <https://doi.org/10.1007/s41063-018-0056-9> , hdl:10013/epic.aaca16c8-2d0e-408f-8a46-5bbec5df1c9c |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1007/s41063-018-0056-9 |
container_title |
arktos |
container_volume |
4 |
container_issue |
1 |
container_start_page |
1 |
op_container_end_page |
18 |
_version_ |
1810292062540529664 |