Soil carbon loss in warmed subarctic grasslands is rapid and restricted to topsoil
Global warming may lead to carbon transfers from soils to the atmosphere, yet this positive feedback to the climate system remains highly uncertain, especially in subsoils (Ilyina and Friedlingstein, 2016; Shi et al., 2018). Using natural geothermal soil warming gradients of up to +6.4 ∘C in subarct...
Published in: | Biogeosciences |
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European Geosciences Union (EGU)
2022
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Online Access: | https://pure.iiasa.ac.at/id/eprint/18141/ https://doi.org/10.5194/bg-19-3381-2022 https://pure.iiasa.ac.at/id/eprint/18141/1/bg-19-3381-2022.pdf |
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ftiiasalaxendare:oai:pure.iiasa.ac.at:18141 2023-05-15T18:28:14+02:00 Soil carbon loss in warmed subarctic grasslands is rapid and restricted to topsoil Verbrigghe, N. Leblans, N. Sigurdsson, B. Vicca, S. Fang, C. Fuchslueger, L. Soong, J. Weedon, J. Poeplau, C. Ariza-Carricondo, C. Bahn, M. Guenet, B. Gundersen, P. Gunnarsdóttir, G. Kätterer, T. Liu, Z. Maljanen, M. Marañón-Jiménez, S. Meeran, K. Oddsdóttir, E. Ostonen, I. Peñuelas, J. Richter, A. Sardans, J. Sigurðsson, P. Torn, M. Van Bodegom, P. Verbruggen, E. Walker, T. Wallander, H. Janssens, I. 2022-07-20 text https://pure.iiasa.ac.at/id/eprint/18141/ https://doi.org/10.5194/bg-19-3381-2022 https://pure.iiasa.ac.at/id/eprint/18141/1/bg-19-3381-2022.pdf en eng European Geosciences Union (EGU) Copernicus https://pure.iiasa.ac.at/id/eprint/18141/1/bg-19-3381-2022.pdf Verbrigghe, N., Leblans, N., Sigurdsson, B., Vicca, S., Fang, C., Fuchslueger, L., Soong, J., Weedon, J., et al. (2022). Soil carbon loss in warmed subarctic grasslands is rapid and restricted to topsoil. Biogeosciences 19 (14) 3381-3393. 10.5194/bg-19-3381-2022 <https://doi.org/10.5194/bg-19-3381-2022>. doi:10.5194/bg-19-3381-2022 cc_by_4 info:eu-repo/semantics/openAccess CC-BY Article PeerReviewed info:eu-repo/semantics/article 2022 ftiiasalaxendare https://doi.org/10.5194/bg-19-3381-2022 2022-08-07T23:23:22Z Global warming may lead to carbon transfers from soils to the atmosphere, yet this positive feedback to the climate system remains highly uncertain, especially in subsoils (Ilyina and Friedlingstein, 2016; Shi et al., 2018). Using natural geothermal soil warming gradients of up to +6.4 ∘C in subarctic grasslands (Sigurdsson et al., 2016), we show that soil organic carbon (SOC) stocks decline strongly and linearly with warming (−2.8 t ha−1 ∘C−1). Comparison of SOC stock changes following medium-term (5 and 10 years) and long-term (>50 years) warming revealed that all SOC stock reduction occurred within the first 5 years of warming, after which continued warming no longer reduced SOC stocks. This rapid equilibration of SOC observed in Andosol suggests a critical role for ecosystem adaptations to warming and could imply short-lived soil carbon–climate feedbacks. Our data further revealed that the soil C loss occurred in all aggregate size fractions and that SOC stock reduction was only visible in topsoil (0–10 cm). SOC stocks in subsoil (10–30 cm), where plant roots were absent, showed apparent conservation after >50 years of warming. The observed depth-dependent warming responses indicate that explicit vertical resolution is a prerequisite for global models to accurately project future SOC stocks for this soil type and should be investigated for soils with other mineralogies. Article in Journal/Newspaper Subarctic IIASA DARE (Data Repository of the International Institute of Applied Systems Analysis) Biogeosciences 19 14 3381 3393 |
institution |
Open Polar |
collection |
IIASA DARE (Data Repository of the International Institute of Applied Systems Analysis) |
op_collection_id |
ftiiasalaxendare |
language |
English |
description |
Global warming may lead to carbon transfers from soils to the atmosphere, yet this positive feedback to the climate system remains highly uncertain, especially in subsoils (Ilyina and Friedlingstein, 2016; Shi et al., 2018). Using natural geothermal soil warming gradients of up to +6.4 ∘C in subarctic grasslands (Sigurdsson et al., 2016), we show that soil organic carbon (SOC) stocks decline strongly and linearly with warming (−2.8 t ha−1 ∘C−1). Comparison of SOC stock changes following medium-term (5 and 10 years) and long-term (>50 years) warming revealed that all SOC stock reduction occurred within the first 5 years of warming, after which continued warming no longer reduced SOC stocks. This rapid equilibration of SOC observed in Andosol suggests a critical role for ecosystem adaptations to warming and could imply short-lived soil carbon–climate feedbacks. Our data further revealed that the soil C loss occurred in all aggregate size fractions and that SOC stock reduction was only visible in topsoil (0–10 cm). SOC stocks in subsoil (10–30 cm), where plant roots were absent, showed apparent conservation after >50 years of warming. The observed depth-dependent warming responses indicate that explicit vertical resolution is a prerequisite for global models to accurately project future SOC stocks for this soil type and should be investigated for soils with other mineralogies. |
format |
Article in Journal/Newspaper |
author |
Verbrigghe, N. Leblans, N. Sigurdsson, B. Vicca, S. Fang, C. Fuchslueger, L. Soong, J. Weedon, J. Poeplau, C. Ariza-Carricondo, C. Bahn, M. Guenet, B. Gundersen, P. Gunnarsdóttir, G. Kätterer, T. Liu, Z. Maljanen, M. Marañón-Jiménez, S. Meeran, K. Oddsdóttir, E. Ostonen, I. Peñuelas, J. Richter, A. Sardans, J. Sigurðsson, P. Torn, M. Van Bodegom, P. Verbruggen, E. Walker, T. Wallander, H. Janssens, I. |
spellingShingle |
Verbrigghe, N. Leblans, N. Sigurdsson, B. Vicca, S. Fang, C. Fuchslueger, L. Soong, J. Weedon, J. Poeplau, C. Ariza-Carricondo, C. Bahn, M. Guenet, B. Gundersen, P. Gunnarsdóttir, G. Kätterer, T. Liu, Z. Maljanen, M. Marañón-Jiménez, S. Meeran, K. Oddsdóttir, E. Ostonen, I. Peñuelas, J. Richter, A. Sardans, J. Sigurðsson, P. Torn, M. Van Bodegom, P. Verbruggen, E. Walker, T. Wallander, H. Janssens, I. Soil carbon loss in warmed subarctic grasslands is rapid and restricted to topsoil |
author_facet |
Verbrigghe, N. Leblans, N. Sigurdsson, B. Vicca, S. Fang, C. Fuchslueger, L. Soong, J. Weedon, J. Poeplau, C. Ariza-Carricondo, C. Bahn, M. Guenet, B. Gundersen, P. Gunnarsdóttir, G. Kätterer, T. Liu, Z. Maljanen, M. Marañón-Jiménez, S. Meeran, K. Oddsdóttir, E. Ostonen, I. Peñuelas, J. Richter, A. Sardans, J. Sigurðsson, P. Torn, M. Van Bodegom, P. Verbruggen, E. Walker, T. Wallander, H. Janssens, I. |
author_sort |
Verbrigghe, N. |
title |
Soil carbon loss in warmed subarctic grasslands is rapid and restricted to topsoil |
title_short |
Soil carbon loss in warmed subarctic grasslands is rapid and restricted to topsoil |
title_full |
Soil carbon loss in warmed subarctic grasslands is rapid and restricted to topsoil |
title_fullStr |
Soil carbon loss in warmed subarctic grasslands is rapid and restricted to topsoil |
title_full_unstemmed |
Soil carbon loss in warmed subarctic grasslands is rapid and restricted to topsoil |
title_sort |
soil carbon loss in warmed subarctic grasslands is rapid and restricted to topsoil |
publisher |
European Geosciences Union (EGU) |
publishDate |
2022 |
url |
https://pure.iiasa.ac.at/id/eprint/18141/ https://doi.org/10.5194/bg-19-3381-2022 https://pure.iiasa.ac.at/id/eprint/18141/1/bg-19-3381-2022.pdf |
genre |
Subarctic |
genre_facet |
Subarctic |
op_relation |
https://pure.iiasa.ac.at/id/eprint/18141/1/bg-19-3381-2022.pdf Verbrigghe, N., Leblans, N., Sigurdsson, B., Vicca, S., Fang, C., Fuchslueger, L., Soong, J., Weedon, J., et al. (2022). Soil carbon loss in warmed subarctic grasslands is rapid and restricted to topsoil. Biogeosciences 19 (14) 3381-3393. 10.5194/bg-19-3381-2022 <https://doi.org/10.5194/bg-19-3381-2022>. doi:10.5194/bg-19-3381-2022 |
op_rights |
cc_by_4 info:eu-repo/semantics/openAccess |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.5194/bg-19-3381-2022 |
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Biogeosciences |
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19 |
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14 |
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3381 |
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3393 |
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