Landscape controls and vertical variability of soil organic carbon storage in permafrost-affected soils of the Lena River Delta
To project the future development of the soil organic carbon (SOC) storage in permafrost environments, the spatial and vertical distribution of key soil properties and their landscape controls needs to be understood. This article reports findings from the Arctic Lena River Delta where we sampled 50...
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2016
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ftcopenhagenunip:oai:pure.atira.dk:publications/28c1a968-e26b-4c3b-82e6-6da5cbe2c55d 2024-04-21T08:04:31+00:00 Landscape controls and vertical variability of soil organic carbon storage in permafrost-affected soils of the Lena River Delta Siewert, Matthias Benjamin Hugelius, Gustaf Heim, Birgit Faucherre, Samuel 2016 https://curis.ku.dk/portal/da/publications/landscape-controls-and-vertical-variability-of-soil-organic-carbon-storage-in-permafrostaffected-soils-of-the-lena-river-delta(28c1a968-e26b-4c3b-82e6-6da5cbe2c55d).html https://doi.org/10.1016/j.catena.2016.07.048 eng eng info:eu-repo/semantics/closedAccess Siewert , M B , Hugelius , G , Heim , B & Faucherre , S 2016 , ' Landscape controls and vertical variability of soil organic carbon storage in permafrost-affected soils of the Lena River Delta ' , CATENA , vol. 147 , pp. 725-741 . https://doi.org/10.1016/j.catena.2016.07.048 Deltas Permafrost Soil organic carbon Soil taxonomy Thematic mapping article 2016 ftcopenhagenunip https://doi.org/10.1016/j.catena.2016.07.048 2024-03-28T01:21:43Z To project the future development of the soil organic carbon (SOC) storage in permafrost environments, the spatial and vertical distribution of key soil properties and their landscape controls needs to be understood. This article reports findings from the Arctic Lena River Delta where we sampled 50 soil pedons. These were classified according to the U.S.D.A. Soil Taxonomy and fall mostly into the Gelisol soil order used for permafrost-affected soils. Soil profiles have been sampled for the active layer (mean depth 58 ± 10 cm) and the upper permafrost to one meter depth. We analyze SOC stocks and key soil properties, i.e. C%, N%, C/N, bulk density, visible ice and water content. These are compared for different landscape groupings of pedons according to geomorphology, soil and land cover and for different vertical depth increments. High vertical resolution plots are used to understand soil development. These show that SOC storage can be highly variable with depth. We recommend the treatment of permafrost-affected soils according to subdivisions into: the surface organic layer, mineral subsoil in the active layer, organic enriched cryoturbated or buried horizons and the mineral subsoil in the permafrost. The major geomorphological units of a subregion of the Lena River Delta were mapped with a land form classification using a data-fusion approach of optical satellite imagery and digital elevation data to upscale SOC storage. Landscape mean SOC storage is estimated to 19.2 ± 2.0 kg C m − 2 . Our results show that the geomorphological setting explains more soil variability than soil taxonomy classes or vegetation cover. The soils from the oldest, Pleistocene aged, unit of the delta store the highest amount of SOC per m 2 followed by the Holocene river terrace. The Pleistocene terrace affected by thermal-degradation, the recent floodplain and bare alluvial sediments store considerably less SOC in descending order. Article in Journal/Newspaper Ice lena river permafrost University of Copenhagen: Research CATENA 147 725 741 |
institution |
Open Polar |
collection |
University of Copenhagen: Research |
op_collection_id |
ftcopenhagenunip |
language |
English |
topic |
Deltas Permafrost Soil organic carbon Soil taxonomy Thematic mapping |
spellingShingle |
Deltas Permafrost Soil organic carbon Soil taxonomy Thematic mapping Siewert, Matthias Benjamin Hugelius, Gustaf Heim, Birgit Faucherre, Samuel Landscape controls and vertical variability of soil organic carbon storage in permafrost-affected soils of the Lena River Delta |
topic_facet |
Deltas Permafrost Soil organic carbon Soil taxonomy Thematic mapping |
description |
To project the future development of the soil organic carbon (SOC) storage in permafrost environments, the spatial and vertical distribution of key soil properties and their landscape controls needs to be understood. This article reports findings from the Arctic Lena River Delta where we sampled 50 soil pedons. These were classified according to the U.S.D.A. Soil Taxonomy and fall mostly into the Gelisol soil order used for permafrost-affected soils. Soil profiles have been sampled for the active layer (mean depth 58 ± 10 cm) and the upper permafrost to one meter depth. We analyze SOC stocks and key soil properties, i.e. C%, N%, C/N, bulk density, visible ice and water content. These are compared for different landscape groupings of pedons according to geomorphology, soil and land cover and for different vertical depth increments. High vertical resolution plots are used to understand soil development. These show that SOC storage can be highly variable with depth. We recommend the treatment of permafrost-affected soils according to subdivisions into: the surface organic layer, mineral subsoil in the active layer, organic enriched cryoturbated or buried horizons and the mineral subsoil in the permafrost. The major geomorphological units of a subregion of the Lena River Delta were mapped with a land form classification using a data-fusion approach of optical satellite imagery and digital elevation data to upscale SOC storage. Landscape mean SOC storage is estimated to 19.2 ± 2.0 kg C m − 2 . Our results show that the geomorphological setting explains more soil variability than soil taxonomy classes or vegetation cover. The soils from the oldest, Pleistocene aged, unit of the delta store the highest amount of SOC per m 2 followed by the Holocene river terrace. The Pleistocene terrace affected by thermal-degradation, the recent floodplain and bare alluvial sediments store considerably less SOC in descending order. |
format |
Article in Journal/Newspaper |
author |
Siewert, Matthias Benjamin Hugelius, Gustaf Heim, Birgit Faucherre, Samuel |
author_facet |
Siewert, Matthias Benjamin Hugelius, Gustaf Heim, Birgit Faucherre, Samuel |
author_sort |
Siewert, Matthias Benjamin |
title |
Landscape controls and vertical variability of soil organic carbon storage in permafrost-affected soils of the Lena River Delta |
title_short |
Landscape controls and vertical variability of soil organic carbon storage in permafrost-affected soils of the Lena River Delta |
title_full |
Landscape controls and vertical variability of soil organic carbon storage in permafrost-affected soils of the Lena River Delta |
title_fullStr |
Landscape controls and vertical variability of soil organic carbon storage in permafrost-affected soils of the Lena River Delta |
title_full_unstemmed |
Landscape controls and vertical variability of soil organic carbon storage in permafrost-affected soils of the Lena River Delta |
title_sort |
landscape controls and vertical variability of soil organic carbon storage in permafrost-affected soils of the lena river delta |
publishDate |
2016 |
url |
https://curis.ku.dk/portal/da/publications/landscape-controls-and-vertical-variability-of-soil-organic-carbon-storage-in-permafrostaffected-soils-of-the-lena-river-delta(28c1a968-e26b-4c3b-82e6-6da5cbe2c55d).html https://doi.org/10.1016/j.catena.2016.07.048 |
genre |
Ice lena river permafrost |
genre_facet |
Ice lena river permafrost |
op_source |
Siewert , M B , Hugelius , G , Heim , B & Faucherre , S 2016 , ' Landscape controls and vertical variability of soil organic carbon storage in permafrost-affected soils of the Lena River Delta ' , CATENA , vol. 147 , pp. 725-741 . https://doi.org/10.1016/j.catena.2016.07.048 |
op_rights |
info:eu-repo/semantics/closedAccess |
op_doi |
https://doi.org/10.1016/j.catena.2016.07.048 |
container_title |
CATENA |
container_volume |
147 |
container_start_page |
725 |
op_container_end_page |
741 |
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