Peatland Initiation, Carbon Accumulation, and 2 ka Depth in the James Bay Lowland and Adjacent Regions
Copyright © 2014 University of Colorado at Boulder, Institute of Arctic and Alpine Research Peatlands surrounding Hudson and James Bays form the second largest peatland complex in the world and contain major stores of soil carbon (C). This study utilized a transect of eight ombrotrophic peat cores f...
Published in: | Arctic, Antarctic, and Alpine Research |
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University of Colorado at Boulder, Institute of Arctic and Alpine Research - Blue Policies in RoMEO
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Online Access: | http://hdl.handle.net/10871/16862 https://doi.org/10.1657/1938-4246-46.1.19 |
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ftunivexeter:oai:ore.exeter.ac.uk:10871/16862 2023-05-15T14:14:28+02:00 Peatland Initiation, Carbon Accumulation, and 2 ka Depth in the James Bay Lowland and Adjacent Regions Holmquist, James R. MacDonald, Glen M. Gallego-Sala, Angela V. 2014 http://hdl.handle.net/10871/16862 https://doi.org/10.1657/1938-4246-46.1.19 en eng University of Colorado at Boulder, Institute of Arctic and Alpine Research - Blue Policies in RoMEO http://dx.doi.org/10.1657/1938-4246-46.1.19 Vol. 46 (1), pp. 19 - 39 doi:10.1657/1938-4246-46.1.19 NSF-0843685 NSF-0628598 http://hdl.handle.net/10871/16862 1523-0430 1938-4246 Arctic, Antarctic, and Alpine Research Article 2014 ftunivexeter https://doi.org/10.1657/1938-4246-46.1.19 2022-11-20T21:31:03Z Copyright © 2014 University of Colorado at Boulder, Institute of Arctic and Alpine Research Peatlands surrounding Hudson and James Bays form the second largest peatland complex in the world and contain major stores of soil carbon (C). This study utilized a transect of eight ombrotrophic peat cores from remote regions of central and northern Ontario to quantify the magnitude and rate of C accumulation since peatland initiation and for the past 2000 calendar years before present (2 ka). These new data were supplemented by 17 millennially resolved chronologies from a literature review covering the Boreal Shield, Hudson Plains, and Taiga Shield bordering Hudson and James Bays. Peatlands initiated in central and northern Ontario by 7.8 ka following deglaciation and isostatic emergence of northern areas to above sea level. Total C accumulated since inception averaged 109.7 ± (std. dev.) 36.2 kg C m–2. Approximately 40% of total soil C has accumulated since 2 ka at an average apparent rate of 20.2 ± 6.9 g C m–2 yr–1. The 2 ka depths correlate significantly and positively with modern gridded climate estimates for mean annual precipitation, mean annual air temperature, growing degree-days > 0 °C, and photosynthetically active radiation integrated over days > 0 °C. There are significantly shallower depths in permafrost peatlands. Vertical peat accumulation was likely constrained by temperature, growing season length, and photosynthetically active radiation over the last 2 ka in the Hudson Bay Lowlands and surrounding regions. US National Science Foundation Article in Journal/Newspaper Antarctic and Alpine Research Arctic Arctic Hudson Bay Institute of Arctic and Alpine Research permafrost taiga Taiga shield James Bay University of Exeter: Open Research Exeter (ORE) Arctic Hudson Hudson Bay Arctic, Antarctic, and Alpine Research 46 1 19 39 |
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Open Polar |
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University of Exeter: Open Research Exeter (ORE) |
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ftunivexeter |
language |
English |
description |
Copyright © 2014 University of Colorado at Boulder, Institute of Arctic and Alpine Research Peatlands surrounding Hudson and James Bays form the second largest peatland complex in the world and contain major stores of soil carbon (C). This study utilized a transect of eight ombrotrophic peat cores from remote regions of central and northern Ontario to quantify the magnitude and rate of C accumulation since peatland initiation and for the past 2000 calendar years before present (2 ka). These new data were supplemented by 17 millennially resolved chronologies from a literature review covering the Boreal Shield, Hudson Plains, and Taiga Shield bordering Hudson and James Bays. Peatlands initiated in central and northern Ontario by 7.8 ka following deglaciation and isostatic emergence of northern areas to above sea level. Total C accumulated since inception averaged 109.7 ± (std. dev.) 36.2 kg C m–2. Approximately 40% of total soil C has accumulated since 2 ka at an average apparent rate of 20.2 ± 6.9 g C m–2 yr–1. The 2 ka depths correlate significantly and positively with modern gridded climate estimates for mean annual precipitation, mean annual air temperature, growing degree-days > 0 °C, and photosynthetically active radiation integrated over days > 0 °C. There are significantly shallower depths in permafrost peatlands. Vertical peat accumulation was likely constrained by temperature, growing season length, and photosynthetically active radiation over the last 2 ka in the Hudson Bay Lowlands and surrounding regions. US National Science Foundation |
format |
Article in Journal/Newspaper |
author |
Holmquist, James R. MacDonald, Glen M. Gallego-Sala, Angela V. |
spellingShingle |
Holmquist, James R. MacDonald, Glen M. Gallego-Sala, Angela V. Peatland Initiation, Carbon Accumulation, and 2 ka Depth in the James Bay Lowland and Adjacent Regions |
author_facet |
Holmquist, James R. MacDonald, Glen M. Gallego-Sala, Angela V. |
author_sort |
Holmquist, James R. |
title |
Peatland Initiation, Carbon Accumulation, and 2 ka Depth in the James Bay Lowland and Adjacent Regions |
title_short |
Peatland Initiation, Carbon Accumulation, and 2 ka Depth in the James Bay Lowland and Adjacent Regions |
title_full |
Peatland Initiation, Carbon Accumulation, and 2 ka Depth in the James Bay Lowland and Adjacent Regions |
title_fullStr |
Peatland Initiation, Carbon Accumulation, and 2 ka Depth in the James Bay Lowland and Adjacent Regions |
title_full_unstemmed |
Peatland Initiation, Carbon Accumulation, and 2 ka Depth in the James Bay Lowland and Adjacent Regions |
title_sort |
peatland initiation, carbon accumulation, and 2 ka depth in the james bay lowland and adjacent regions |
publisher |
University of Colorado at Boulder, Institute of Arctic and Alpine Research - Blue Policies in RoMEO |
publishDate |
2014 |
url |
http://hdl.handle.net/10871/16862 https://doi.org/10.1657/1938-4246-46.1.19 |
geographic |
Arctic Hudson Hudson Bay |
geographic_facet |
Arctic Hudson Hudson Bay |
genre |
Antarctic and Alpine Research Arctic Arctic Hudson Bay Institute of Arctic and Alpine Research permafrost taiga Taiga shield James Bay |
genre_facet |
Antarctic and Alpine Research Arctic Arctic Hudson Bay Institute of Arctic and Alpine Research permafrost taiga Taiga shield James Bay |
op_relation |
http://dx.doi.org/10.1657/1938-4246-46.1.19 Vol. 46 (1), pp. 19 - 39 doi:10.1657/1938-4246-46.1.19 NSF-0843685 NSF-0628598 http://hdl.handle.net/10871/16862 1523-0430 1938-4246 Arctic, Antarctic, and Alpine Research |
op_doi |
https://doi.org/10.1657/1938-4246-46.1.19 |
container_title |
Arctic, Antarctic, and Alpine Research |
container_volume |
46 |
container_issue |
1 |
container_start_page |
19 |
op_container_end_page |
39 |
_version_ |
1766286914568060928 |