Landscape partitioning and burial processes of soil organic carbon in contrasting areas of continuous permafrost
Recent studies have shown that permafrost soils in the northern circumpolar region store almost twice as much carbon as the atmosphere. Since soil organic carbon (SOC) pools have large regional and landscape-level variability, detailed SOC inventories from across the northern permafrost region are n...
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Stockholms universitet, Institutionen för naturgeografi
2017
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ftstockholmuniv:oai:DiVA.org:su-136383 2023-05-15T15:18:10+02:00 Landscape partitioning and burial processes of soil organic carbon in contrasting areas of continuous permafrost Palmtag, Juri 2017 application/pdf http://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-136383 eng eng Stockholms universitet, Institutionen för naturgeografi Stockholm : Department of Physical Geography, Stockholm University Dissertations from the Department of Physical Geography, 1653-7211 61 info:eu-repo/grantAgreement/EC/FP7/282700 orcid:0000-0002-6921-5697 http://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-136383 urn:isbn:978-91-7649-610-7 urn:isbn:978-91-7649-611-4 info:eu-repo/semantics/openAccess soil organic carbon total nitrogen permafrost cryoturbation geomorphology land cover classification slope processes texture upscaling carbon/nitrogen ratio Physical Geography Naturgeografi Climate Research Klimatforskning Doctoral thesis, comprehensive summary info:eu-repo/semantics/doctoralThesis text 2017 ftstockholmuniv 2023-02-23T21:43:34Z Recent studies have shown that permafrost soils in the northern circumpolar region store almost twice as much carbon as the atmosphere. Since soil organic carbon (SOC) pools have large regional and landscape-level variability, detailed SOC inventories from across the northern permafrost region are needed to assess potential remobilization of SOC with permafrost degradation and to quantify the permafrost carbon-climate feedback on global warming. This thesis provides high-resolution data on SOC storage in five study areas located in undersampled regions of the continuous permafrost zone (Zackenberg in NE Greenland; Shalaurovo and Cherskiy in NE Siberia; Ary-Mas and Logata in Taymyr Peninsula). The emphasis throughout the five different study areas is put on SOC partitioning within the landscape and soil horizon levels as well as on soil forming processes under periglacial conditions. Our results indicate large differences in mean SOC 0–100 cm storage among study areas, ranging from 4.8 to 30.0 kg C m-2, highlighting the need to consider numerous factors as topography, geomorphology, land cover, soil texture, soil moisture, etc. in the assessment of landscape-level and regional SOC stock estimates. In the high arctic mountainous area of Zackenberg, the mean SOC storage is low due to the high proportion of bare grounds. The geomorphology based upscaling resulted in a c. 40% lower estimate compared to a land cover based upscaling (4.8 vs 8.3 kg C m-2, respectively). A landform approach provides a better tool for identifying hotspots of SOC burial in the landscape, which in this area corresponds to alluvial fan deposits in the foothills of the mountains. SOC burial by cryoturbation was much more limited and largely restricted to soils in the lower central valley. In the lowland permafrost study areas of Russia the mean SOC 0–100 cm storage ranged from 14.8 to 30.0 kg C m-2. Cryoturbation is the main burial process of SOC, storing on average c. 30% of the total landscape SOC 0–100 cm in deeper C-enriched pockets in ... Doctoral or Postdoctoral Thesis Arctic Cherskiy Global warming Greenland permafrost Taymyr Taymyr Peninsula Zackenberg Siberia Stockholm University: Publications (DiVA) Arctic Ary-Mas ENVELOPE(145.558,145.558,70.840,70.840) Cherskiy ENVELOPE(161.332,161.332,68.753,68.753) Greenland Logata ENVELOPE(95.783,95.783,73.208,73.208) Shalaurovo ENVELOPE(172.768,172.768,69.980,69.980) Taymyr ENVELOPE(89.987,89.987,68.219,68.219) |
institution |
Open Polar |
collection |
Stockholm University: Publications (DiVA) |
op_collection_id |
ftstockholmuniv |
language |
English |
topic |
soil organic carbon total nitrogen permafrost cryoturbation geomorphology land cover classification slope processes texture upscaling carbon/nitrogen ratio Physical Geography Naturgeografi Climate Research Klimatforskning |
spellingShingle |
soil organic carbon total nitrogen permafrost cryoturbation geomorphology land cover classification slope processes texture upscaling carbon/nitrogen ratio Physical Geography Naturgeografi Climate Research Klimatforskning Palmtag, Juri Landscape partitioning and burial processes of soil organic carbon in contrasting areas of continuous permafrost |
topic_facet |
soil organic carbon total nitrogen permafrost cryoturbation geomorphology land cover classification slope processes texture upscaling carbon/nitrogen ratio Physical Geography Naturgeografi Climate Research Klimatforskning |
description |
Recent studies have shown that permafrost soils in the northern circumpolar region store almost twice as much carbon as the atmosphere. Since soil organic carbon (SOC) pools have large regional and landscape-level variability, detailed SOC inventories from across the northern permafrost region are needed to assess potential remobilization of SOC with permafrost degradation and to quantify the permafrost carbon-climate feedback on global warming. This thesis provides high-resolution data on SOC storage in five study areas located in undersampled regions of the continuous permafrost zone (Zackenberg in NE Greenland; Shalaurovo and Cherskiy in NE Siberia; Ary-Mas and Logata in Taymyr Peninsula). The emphasis throughout the five different study areas is put on SOC partitioning within the landscape and soil horizon levels as well as on soil forming processes under periglacial conditions. Our results indicate large differences in mean SOC 0–100 cm storage among study areas, ranging from 4.8 to 30.0 kg C m-2, highlighting the need to consider numerous factors as topography, geomorphology, land cover, soil texture, soil moisture, etc. in the assessment of landscape-level and regional SOC stock estimates. In the high arctic mountainous area of Zackenberg, the mean SOC storage is low due to the high proportion of bare grounds. The geomorphology based upscaling resulted in a c. 40% lower estimate compared to a land cover based upscaling (4.8 vs 8.3 kg C m-2, respectively). A landform approach provides a better tool for identifying hotspots of SOC burial in the landscape, which in this area corresponds to alluvial fan deposits in the foothills of the mountains. SOC burial by cryoturbation was much more limited and largely restricted to soils in the lower central valley. In the lowland permafrost study areas of Russia the mean SOC 0–100 cm storage ranged from 14.8 to 30.0 kg C m-2. Cryoturbation is the main burial process of SOC, storing on average c. 30% of the total landscape SOC 0–100 cm in deeper C-enriched pockets in ... |
format |
Doctoral or Postdoctoral Thesis |
author |
Palmtag, Juri |
author_facet |
Palmtag, Juri |
author_sort |
Palmtag, Juri |
title |
Landscape partitioning and burial processes of soil organic carbon in contrasting areas of continuous permafrost |
title_short |
Landscape partitioning and burial processes of soil organic carbon in contrasting areas of continuous permafrost |
title_full |
Landscape partitioning and burial processes of soil organic carbon in contrasting areas of continuous permafrost |
title_fullStr |
Landscape partitioning and burial processes of soil organic carbon in contrasting areas of continuous permafrost |
title_full_unstemmed |
Landscape partitioning and burial processes of soil organic carbon in contrasting areas of continuous permafrost |
title_sort |
landscape partitioning and burial processes of soil organic carbon in contrasting areas of continuous permafrost |
publisher |
Stockholms universitet, Institutionen för naturgeografi |
publishDate |
2017 |
url |
http://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-136383 |
long_lat |
ENVELOPE(145.558,145.558,70.840,70.840) ENVELOPE(161.332,161.332,68.753,68.753) ENVELOPE(95.783,95.783,73.208,73.208) ENVELOPE(172.768,172.768,69.980,69.980) ENVELOPE(89.987,89.987,68.219,68.219) |
geographic |
Arctic Ary-Mas Cherskiy Greenland Logata Shalaurovo Taymyr |
geographic_facet |
Arctic Ary-Mas Cherskiy Greenland Logata Shalaurovo Taymyr |
genre |
Arctic Cherskiy Global warming Greenland permafrost Taymyr Taymyr Peninsula Zackenberg Siberia |
genre_facet |
Arctic Cherskiy Global warming Greenland permafrost Taymyr Taymyr Peninsula Zackenberg Siberia |
op_relation |
Dissertations from the Department of Physical Geography, 1653-7211 61 info:eu-repo/grantAgreement/EC/FP7/282700 orcid:0000-0002-6921-5697 http://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-136383 urn:isbn:978-91-7649-610-7 urn:isbn:978-91-7649-611-4 |
op_rights |
info:eu-repo/semantics/openAccess |
_version_ |
1766348398773927936 |