Spatially varying peatland initiation, Holocene development, carbon accumulation patterns and radiative forcing within a subarctic fen
High latitude peatlands act as globally important carbon (C) sinks and are in constant interaction with the atmosphere. Their C storage formed during the Holocene. In the course of time, the aggregate effect of the C fluxes on radiative forcing (RF) typically changes from warming to cooling, but the...
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ftunivhelsihelda:oai:helda.helsinki.fi:10138/349660 2024-01-07T09:45:29+01:00 Spatially varying peatland initiation, Holocene development, carbon accumulation patterns and radiative forcing within a subarctic fen Piilo, Sanna Korhola, Atte Heiskanen, Lauri Tuovinen, Juha-Pekka Aurela, Mika Juutinen, Sari Marttila, Hannu Saari, Markus Tuittila, Eeva-Stiina Turunen, Jukka Väliranta, Minna Helsinki Institute of Sustainability Science (HELSUS) Environmental Change Research Unit (ECRU) Ecosystems and Environment Research Programme Environmental Sciences Department of Forest Sciences 2022-10-06T22:45:40Z 16 application/pdf http://hdl.handle.net/10138/349660 eng eng Elsevier Scientific Publ. Co 10.1016/j.quascirev.2020.106596 Piilo , S , Korhola , A , Heiskanen , L , Tuovinen , J-P , Aurela , M , Juutinen , S , Marttila , H , Saari , M , Tuittila , E-S , Turunen , J & Väliranta , M 2020 , ' Spatially varying peatland initiation, Holocene development, carbon accumulation patterns and radiative forcing within a subarctic fen ' , Quaternary Science Reviews , vol. 248 , 106596 . https://doi.org/10.1016/j.quascirev.2020.106596 ORCID: /0000-0003-0129-7240/work/82128950 147c76a8-0898-4fc4-b0b5-90b38cd110d3 http://hdl.handle.net/10138/349660 000582803000018 cc_by_nc_nd openAccess info:eu-repo/semantics/openAccess 1171 Geosciences Aapa mire Carbon dynamics Lateral expansion Autogenic succession Paleoecology Vegetation dynamics Climate variation High latitudes CLIMATE-CHANGE TEMPERATURE VARIABILITY BOREAL PEATLAND SHORT-TERM NORTHERN DYNAMICS FINLAND MIRES DIOXIDE Article acceptedVersion 2022 ftunivhelsihelda 2023-12-14T00:09:21Z High latitude peatlands act as globally important carbon (C) sinks and are in constant interaction with the atmosphere. Their C storage formed during the Holocene. In the course of time, the aggregate effect of the C fluxes on radiative forcing (RF) typically changes from warming to cooling, but the timing of this shift varies among different peatlands. Here we investigated Holocene peatland development, including vegetation history, vertical peat growth and the lateral expansion of a patterned subarctic fen in northern Finland by means of multiple sampling points. We modelled the Holocene RF by combining knowledge on past vegetation communities based on plant macrofossil stratigraphies and present in situ C flux measurements. The peatland initiated at ca. 9500 calibrated years Before Present (cal yr BP), and its lateral expansion was greatest between ca. 9000 and 7000 cal yr BP. After the early expansion, vertical peat growth proceeded very differently in different parts of the peatland, regulated by internal and external factors. The pronounced surface microtopography, with high strings and wet (larks, started to form only after ca. 1000 cal yr BP. C accumulation within the peatland recorded a high degree of spatial variability throughout its history, including the recent past. We applied two flux scenarios with different interpretation of the initial peatland development phases to estimate the RF induced by C fluxes of the fen. After ca. 4000 cal yr BP, at the latest, the peatland RF has been negative (cooling), mainly driven by C uptake and biomass production, while methane emissions had a lesser role in the total RF. Interestingly, these scenarios suggest that the greatest cooling effect took place around ca. 1000 cal yr BP, after which the surface microtopography established. The study demonstrated that despite the high spatial heterogeneity and idiosyncratic behaviour of the peatland, the RF of the studied fen followed the general development pattern of more southern peatlands. Holocene climate variations ... Article in Journal/Newspaper Northern Finland Subarctic HELDA – University of Helsinki Open Repository Quaternary Science Reviews 248 106596 |
institution |
Open Polar |
collection |
HELDA – University of Helsinki Open Repository |
op_collection_id |
ftunivhelsihelda |
language |
English |
topic |
1171 Geosciences Aapa mire Carbon dynamics Lateral expansion Autogenic succession Paleoecology Vegetation dynamics Climate variation High latitudes CLIMATE-CHANGE TEMPERATURE VARIABILITY BOREAL PEATLAND SHORT-TERM NORTHERN DYNAMICS FINLAND MIRES DIOXIDE |
spellingShingle |
1171 Geosciences Aapa mire Carbon dynamics Lateral expansion Autogenic succession Paleoecology Vegetation dynamics Climate variation High latitudes CLIMATE-CHANGE TEMPERATURE VARIABILITY BOREAL PEATLAND SHORT-TERM NORTHERN DYNAMICS FINLAND MIRES DIOXIDE Piilo, Sanna Korhola, Atte Heiskanen, Lauri Tuovinen, Juha-Pekka Aurela, Mika Juutinen, Sari Marttila, Hannu Saari, Markus Tuittila, Eeva-Stiina Turunen, Jukka Väliranta, Minna Spatially varying peatland initiation, Holocene development, carbon accumulation patterns and radiative forcing within a subarctic fen |
topic_facet |
1171 Geosciences Aapa mire Carbon dynamics Lateral expansion Autogenic succession Paleoecology Vegetation dynamics Climate variation High latitudes CLIMATE-CHANGE TEMPERATURE VARIABILITY BOREAL PEATLAND SHORT-TERM NORTHERN DYNAMICS FINLAND MIRES DIOXIDE |
description |
High latitude peatlands act as globally important carbon (C) sinks and are in constant interaction with the atmosphere. Their C storage formed during the Holocene. In the course of time, the aggregate effect of the C fluxes on radiative forcing (RF) typically changes from warming to cooling, but the timing of this shift varies among different peatlands. Here we investigated Holocene peatland development, including vegetation history, vertical peat growth and the lateral expansion of a patterned subarctic fen in northern Finland by means of multiple sampling points. We modelled the Holocene RF by combining knowledge on past vegetation communities based on plant macrofossil stratigraphies and present in situ C flux measurements. The peatland initiated at ca. 9500 calibrated years Before Present (cal yr BP), and its lateral expansion was greatest between ca. 9000 and 7000 cal yr BP. After the early expansion, vertical peat growth proceeded very differently in different parts of the peatland, regulated by internal and external factors. The pronounced surface microtopography, with high strings and wet (larks, started to form only after ca. 1000 cal yr BP. C accumulation within the peatland recorded a high degree of spatial variability throughout its history, including the recent past. We applied two flux scenarios with different interpretation of the initial peatland development phases to estimate the RF induced by C fluxes of the fen. After ca. 4000 cal yr BP, at the latest, the peatland RF has been negative (cooling), mainly driven by C uptake and biomass production, while methane emissions had a lesser role in the total RF. Interestingly, these scenarios suggest that the greatest cooling effect took place around ca. 1000 cal yr BP, after which the surface microtopography established. The study demonstrated that despite the high spatial heterogeneity and idiosyncratic behaviour of the peatland, the RF of the studied fen followed the general development pattern of more southern peatlands. Holocene climate variations ... |
author2 |
Helsinki Institute of Sustainability Science (HELSUS) Environmental Change Research Unit (ECRU) Ecosystems and Environment Research Programme Environmental Sciences Department of Forest Sciences |
format |
Article in Journal/Newspaper |
author |
Piilo, Sanna Korhola, Atte Heiskanen, Lauri Tuovinen, Juha-Pekka Aurela, Mika Juutinen, Sari Marttila, Hannu Saari, Markus Tuittila, Eeva-Stiina Turunen, Jukka Väliranta, Minna |
author_facet |
Piilo, Sanna Korhola, Atte Heiskanen, Lauri Tuovinen, Juha-Pekka Aurela, Mika Juutinen, Sari Marttila, Hannu Saari, Markus Tuittila, Eeva-Stiina Turunen, Jukka Väliranta, Minna |
author_sort |
Piilo, Sanna |
title |
Spatially varying peatland initiation, Holocene development, carbon accumulation patterns and radiative forcing within a subarctic fen |
title_short |
Spatially varying peatland initiation, Holocene development, carbon accumulation patterns and radiative forcing within a subarctic fen |
title_full |
Spatially varying peatland initiation, Holocene development, carbon accumulation patterns and radiative forcing within a subarctic fen |
title_fullStr |
Spatially varying peatland initiation, Holocene development, carbon accumulation patterns and radiative forcing within a subarctic fen |
title_full_unstemmed |
Spatially varying peatland initiation, Holocene development, carbon accumulation patterns and radiative forcing within a subarctic fen |
title_sort |
spatially varying peatland initiation, holocene development, carbon accumulation patterns and radiative forcing within a subarctic fen |
publisher |
Elsevier Scientific Publ. Co |
publishDate |
2022 |
url |
http://hdl.handle.net/10138/349660 |
genre |
Northern Finland Subarctic |
genre_facet |
Northern Finland Subarctic |
op_relation |
10.1016/j.quascirev.2020.106596 Piilo , S , Korhola , A , Heiskanen , L , Tuovinen , J-P , Aurela , M , Juutinen , S , Marttila , H , Saari , M , Tuittila , E-S , Turunen , J & Väliranta , M 2020 , ' Spatially varying peatland initiation, Holocene development, carbon accumulation patterns and radiative forcing within a subarctic fen ' , Quaternary Science Reviews , vol. 248 , 106596 . https://doi.org/10.1016/j.quascirev.2020.106596 ORCID: /0000-0003-0129-7240/work/82128950 147c76a8-0898-4fc4-b0b5-90b38cd110d3 http://hdl.handle.net/10138/349660 000582803000018 |
op_rights |
cc_by_nc_nd openAccess info:eu-repo/semantics/openAccess |
container_title |
Quaternary Science Reviews |
container_volume |
248 |
container_start_page |
106596 |
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1787427039064621056 |