Carbon Pools and Accumulation Rates in an Age‐Series of Soils in Drained Thaw‐Lake Basins, Arctic Alaska
We examined soils in 20 drained thaw‐lake basins (DTLBs) near Barrow representing four age classes: young [0–50 years before present (BP)], medium (50–300 BP), old (300–2000 BP), and ancient (2000–5500 BP). In addition, we examined an erosional remnant that is about 8000 yr in age with deep organic...
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crwiley:10.2136/sssaj2004.6970 2024-09-09T19:24:11+00:00 Carbon Pools and Accumulation Rates in an Age‐Series of Soils in Drained Thaw‐Lake Basins, Arctic Alaska Bockheim, J. G. Hinkel, K. M. Eisner, W. R. Dai, X. Y. National Science Foundation 2004 http://dx.doi.org/10.2136/sssaj2004.6970 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.2136%2Fsssaj2004.6970 https://onlinelibrary.wiley.com/doi/pdf/10.2136/sssaj2004.6970 https://onlinelibrary.wiley.com/doi/full-xml/10.2136/sssaj2004.6970 en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Soil Science Society of America Journal volume 68, issue 2, page 697-704 ISSN 0361-5995 1435-0661 journal-article 2004 crwiley https://doi.org/10.2136/sssaj2004.6970 2024-06-18T04:12:04Z We examined soils in 20 drained thaw‐lake basins (DTLBs) near Barrow representing four age classes: young [0–50 years before present (BP)], medium (50–300 BP), old (300–2000 BP), and ancient (2000–5500 BP). In addition, we examined an erosional remnant that is about 8000 yr in age with deep organic deposits. There are significant age‐related differences in thickness of the organic layer, which for DTLBs represents surface organic accumulation since lake drainage. The lower portion of the organic layer progresses in decomposition stage from fibric in young basins to sapric in ancient basins and the erosional remnant. Whereas extractable organic matter (humic‐ and fulvic‐acid fractions) in the organic layer decreases, the nonextractable portion (humin) increases with basin age. There are significant age‐related differences ( p = 0.027) in soil organic carbon (SOC) of the organic layer; however, there were no significant differences in C pools for other depths or within the upper 100 cm. Profile SOC pools in DTLBs average 48 kg m −3 , which is less than elsewhere on the Arctic Coastal Plain (62 kg m −3 ). From a depth of 100 to approximately 160 cm, SOC pools average 3.2 kg C m −2 dm −1 , confirming that there are large amounts of SOC below the traditional reporting depth of 100 cm. The spatial variability of SOC pools increases with relative basin age class and is likely because of increased variability in hydrology related to enrichment of ground ice in the upper permafrost. The long‐term net accumulation (during the last 5500 yr) of SOC is 13 g m −2 yr −1 Article in Journal/Newspaper Arctic Barrow Ice permafrost Alaska Wiley Online Library Arctic Soil Science Society of America Journal 68 2 697 704 |
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Open Polar |
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Wiley Online Library |
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crwiley |
language |
English |
description |
We examined soils in 20 drained thaw‐lake basins (DTLBs) near Barrow representing four age classes: young [0–50 years before present (BP)], medium (50–300 BP), old (300–2000 BP), and ancient (2000–5500 BP). In addition, we examined an erosional remnant that is about 8000 yr in age with deep organic deposits. There are significant age‐related differences in thickness of the organic layer, which for DTLBs represents surface organic accumulation since lake drainage. The lower portion of the organic layer progresses in decomposition stage from fibric in young basins to sapric in ancient basins and the erosional remnant. Whereas extractable organic matter (humic‐ and fulvic‐acid fractions) in the organic layer decreases, the nonextractable portion (humin) increases with basin age. There are significant age‐related differences ( p = 0.027) in soil organic carbon (SOC) of the organic layer; however, there were no significant differences in C pools for other depths or within the upper 100 cm. Profile SOC pools in DTLBs average 48 kg m −3 , which is less than elsewhere on the Arctic Coastal Plain (62 kg m −3 ). From a depth of 100 to approximately 160 cm, SOC pools average 3.2 kg C m −2 dm −1 , confirming that there are large amounts of SOC below the traditional reporting depth of 100 cm. The spatial variability of SOC pools increases with relative basin age class and is likely because of increased variability in hydrology related to enrichment of ground ice in the upper permafrost. The long‐term net accumulation (during the last 5500 yr) of SOC is 13 g m −2 yr −1 |
author2 |
National Science Foundation |
format |
Article in Journal/Newspaper |
author |
Bockheim, J. G. Hinkel, K. M. Eisner, W. R. Dai, X. Y. |
spellingShingle |
Bockheim, J. G. Hinkel, K. M. Eisner, W. R. Dai, X. Y. Carbon Pools and Accumulation Rates in an Age‐Series of Soils in Drained Thaw‐Lake Basins, Arctic Alaska |
author_facet |
Bockheim, J. G. Hinkel, K. M. Eisner, W. R. Dai, X. Y. |
author_sort |
Bockheim, J. G. |
title |
Carbon Pools and Accumulation Rates in an Age‐Series of Soils in Drained Thaw‐Lake Basins, Arctic Alaska |
title_short |
Carbon Pools and Accumulation Rates in an Age‐Series of Soils in Drained Thaw‐Lake Basins, Arctic Alaska |
title_full |
Carbon Pools and Accumulation Rates in an Age‐Series of Soils in Drained Thaw‐Lake Basins, Arctic Alaska |
title_fullStr |
Carbon Pools and Accumulation Rates in an Age‐Series of Soils in Drained Thaw‐Lake Basins, Arctic Alaska |
title_full_unstemmed |
Carbon Pools and Accumulation Rates in an Age‐Series of Soils in Drained Thaw‐Lake Basins, Arctic Alaska |
title_sort |
carbon pools and accumulation rates in an age‐series of soils in drained thaw‐lake basins, arctic alaska |
publisher |
Wiley |
publishDate |
2004 |
url |
http://dx.doi.org/10.2136/sssaj2004.6970 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.2136%2Fsssaj2004.6970 https://onlinelibrary.wiley.com/doi/pdf/10.2136/sssaj2004.6970 https://onlinelibrary.wiley.com/doi/full-xml/10.2136/sssaj2004.6970 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic Barrow Ice permafrost Alaska |
genre_facet |
Arctic Barrow Ice permafrost Alaska |
op_source |
Soil Science Society of America Journal volume 68, issue 2, page 697-704 ISSN 0361-5995 1435-0661 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.2136/sssaj2004.6970 |
container_title |
Soil Science Society of America Journal |
container_volume |
68 |
container_issue |
2 |
container_start_page |
697 |
op_container_end_page |
704 |
_version_ |
1809894109797679104 |