Mineral soils are an important intermediate storage pool of black carbon in fennoscandian boreal forests
Approximately 40% of earth's carbon (C) stored in land vegetation and soil is within the boreal region. This large C pool is subjected to substantial removals and transformations during periodic wildfire. Fire-altered C, commonly known as pyrogenic carbon (PyC), plays a significant role in fore...
Published in: | Global Biogeochemical Cycles |
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Umeå universitet, Institutionen för ekologi, miljö och geovetenskap
2022
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Online Access: | http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-201580 https://doi.org/10.1029/2022GB007489 |
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ftumeauniv:oai:DiVA.org:umu-201580 2023-10-09T21:51:28+02:00 Mineral soils are an important intermediate storage pool of black carbon in fennoscandian boreal forests Eckdahl, Johan A. Rodriguez, Pere Casal Kristensen, Jeppe A. Metcalfe, Daniel B. Ljung, Karl 2022 application/pdf http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-201580 https://doi.org/10.1029/2022GB007489 eng eng Umeå universitet, Institutionen för ekologi, miljö och geovetenskap Department of Physical Geography and Ecosystem Science, Lund University, Lund, Sweden Department of Geology, Lund University, Lund, Sweden Environmental Change Institute, School of Geography and the Environment, University of Oxford, Oxford, United Kingdom Global Biogeochemical Cycles, 0886-6236, 2022, 36:11, orcid:0000-0003-1075-9224 orcid:0000-0001-8325-9269 http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-201580 doi:10.1029/2022GB007489 ISI:000889539200001 Scopus 2-s2.0-85142896880 info:eu-repo/semantics/openAccess black carbon boreal wildfire carbon cycle fire severity mineral soil pyrogenic carbon Soil Science Markvetenskap Geochemistry Geokemi Ecology Ekologi Article in journal info:eu-repo/semantics/article text 2022 ftumeauniv https://doi.org/10.1029/2022GB007489 2023-09-22T14:01:28Z Approximately 40% of earth's carbon (C) stored in land vegetation and soil is within the boreal region. This large C pool is subjected to substantial removals and transformations during periodic wildfire. Fire-altered C, commonly known as pyrogenic carbon (PyC), plays a significant role in forest ecosystem functioning and composes a considerable fraction of C transport to limnic and oceanic sediments. While PyC stores are beginning to be quantified globally, knowledge is lacking regarding the drivers of their production and transport across ecosystems. This study used the chemo-thermal oxidation at 375°C (CTO-375) method to isolate a particularly refractory subset of PyC compounds, here called black carbon (BC), finding an average increase of 11.6 g BC m−2 at 1 year postfire in 50 separate wildfires occurring in Sweden during 2018. These increases could not be linked to proposed drivers, however BC storage in 50 additional nearby unburnt soils related strongly to soil mass while its proportion of the larger C pool related negatively to soil C:N. Fire approximately doubled BC stocks in the mineral layer but had no significant effect on BC in the organic layer where it was likely produced. Suppressed decomposition rates and low heating during fire in mineral subsoil relative to upper layers suggests potential removals of the doubled mineral layer BC are more likely transported out of the soil system than degraded in situ. Therefore, mineral soils are suggested to be an important storage pool for BC that can buffer short-term (production in fire) and long-term (cross-ecosystem transport) BC cycling. Article in Journal/Newspaper Fennoscandian Umeå University: Publications (DiVA) Global Biogeochemical Cycles 36 11 |
institution |
Open Polar |
collection |
Umeå University: Publications (DiVA) |
op_collection_id |
ftumeauniv |
language |
English |
topic |
black carbon boreal wildfire carbon cycle fire severity mineral soil pyrogenic carbon Soil Science Markvetenskap Geochemistry Geokemi Ecology Ekologi |
spellingShingle |
black carbon boreal wildfire carbon cycle fire severity mineral soil pyrogenic carbon Soil Science Markvetenskap Geochemistry Geokemi Ecology Ekologi Eckdahl, Johan A. Rodriguez, Pere Casal Kristensen, Jeppe A. Metcalfe, Daniel B. Ljung, Karl Mineral soils are an important intermediate storage pool of black carbon in fennoscandian boreal forests |
topic_facet |
black carbon boreal wildfire carbon cycle fire severity mineral soil pyrogenic carbon Soil Science Markvetenskap Geochemistry Geokemi Ecology Ekologi |
description |
Approximately 40% of earth's carbon (C) stored in land vegetation and soil is within the boreal region. This large C pool is subjected to substantial removals and transformations during periodic wildfire. Fire-altered C, commonly known as pyrogenic carbon (PyC), plays a significant role in forest ecosystem functioning and composes a considerable fraction of C transport to limnic and oceanic sediments. While PyC stores are beginning to be quantified globally, knowledge is lacking regarding the drivers of their production and transport across ecosystems. This study used the chemo-thermal oxidation at 375°C (CTO-375) method to isolate a particularly refractory subset of PyC compounds, here called black carbon (BC), finding an average increase of 11.6 g BC m−2 at 1 year postfire in 50 separate wildfires occurring in Sweden during 2018. These increases could not be linked to proposed drivers, however BC storage in 50 additional nearby unburnt soils related strongly to soil mass while its proportion of the larger C pool related negatively to soil C:N. Fire approximately doubled BC stocks in the mineral layer but had no significant effect on BC in the organic layer where it was likely produced. Suppressed decomposition rates and low heating during fire in mineral subsoil relative to upper layers suggests potential removals of the doubled mineral layer BC are more likely transported out of the soil system than degraded in situ. Therefore, mineral soils are suggested to be an important storage pool for BC that can buffer short-term (production in fire) and long-term (cross-ecosystem transport) BC cycling. |
format |
Article in Journal/Newspaper |
author |
Eckdahl, Johan A. Rodriguez, Pere Casal Kristensen, Jeppe A. Metcalfe, Daniel B. Ljung, Karl |
author_facet |
Eckdahl, Johan A. Rodriguez, Pere Casal Kristensen, Jeppe A. Metcalfe, Daniel B. Ljung, Karl |
author_sort |
Eckdahl, Johan A. |
title |
Mineral soils are an important intermediate storage pool of black carbon in fennoscandian boreal forests |
title_short |
Mineral soils are an important intermediate storage pool of black carbon in fennoscandian boreal forests |
title_full |
Mineral soils are an important intermediate storage pool of black carbon in fennoscandian boreal forests |
title_fullStr |
Mineral soils are an important intermediate storage pool of black carbon in fennoscandian boreal forests |
title_full_unstemmed |
Mineral soils are an important intermediate storage pool of black carbon in fennoscandian boreal forests |
title_sort |
mineral soils are an important intermediate storage pool of black carbon in fennoscandian boreal forests |
publisher |
Umeå universitet, Institutionen för ekologi, miljö och geovetenskap |
publishDate |
2022 |
url |
http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-201580 https://doi.org/10.1029/2022GB007489 |
genre |
Fennoscandian |
genre_facet |
Fennoscandian |
op_relation |
Global Biogeochemical Cycles, 0886-6236, 2022, 36:11, orcid:0000-0003-1075-9224 orcid:0000-0001-8325-9269 http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-201580 doi:10.1029/2022GB007489 ISI:000889539200001 Scopus 2-s2.0-85142896880 |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1029/2022GB007489 |
container_title |
Global Biogeochemical Cycles |
container_volume |
36 |
container_issue |
11 |
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1779314575402860544 |