Carbon isotope evidence for recent climate-related enhancement of CO2 assimilation and peat accumulation rates in Antarctica
Signy Island, maritime Antarctic, lies within the region of the Southern Hemisphere that is currently experiencing the most rapid rates of environmental change. In this study, peat cores up to 2 m in depth from four moss banks on Signy Island were used to reconstruct changes in moss growth and clima...
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Online Access: | http://nora.nerc.ac.uk/id/eprint/17902/ http://onlinelibrary.wiley.com/doi/10.1111/j.1365-2486.2012.02750.x/abstract |
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ftnerc:oai:nora.nerc.ac.uk:17902 2023-05-15T13:45:12+02:00 Carbon isotope evidence for recent climate-related enhancement of CO2 assimilation and peat accumulation rates in Antarctica Royles, Jessica Ogée, Jérôme Wingate, Lisa Hodgson, Dominic A. Convey, Peter Griffiths, Howard 2012 http://nora.nerc.ac.uk/id/eprint/17902/ http://onlinelibrary.wiley.com/doi/10.1111/j.1365-2486.2012.02750.x/abstract unknown Blackwell Royles, Jessica orcid:0000-0003-0489-6863 Ogée, Jérôme; Wingate, Lisa; Hodgson, Dominic A. orcid:0000-0002-3841-3746 Convey, Peter orcid:0000-0001-8497-9903 Griffiths, Howard. 2012 Carbon isotope evidence for recent climate-related enhancement of CO2 assimilation and peat accumulation rates in Antarctica. Global Change Biology, 18 (10). 3112-3124. https://doi.org/10.1111/j.1365-2486.2012.02750.x <https://doi.org/10.1111/j.1365-2486.2012.02750.x> Publication - Article PeerReviewed 2012 ftnerc https://doi.org/10.1111/j.1365-2486.2012.02750.x 2023-02-04T19:31:25Z Signy Island, maritime Antarctic, lies within the region of the Southern Hemisphere that is currently experiencing the most rapid rates of environmental change. In this study, peat cores up to 2 m in depth from four moss banks on Signy Island were used to reconstruct changes in moss growth and climatic characteristics over the late Holocene. Measurements included radiocarbon dating (to determine peat accumulation rates) and stable carbon isotope composition of moss cellulose (to estimate photosynthetic limitation by CO 2 supply and model CO 2 assimilation rate). For at least one intensively 14C-dated Chorisodontium aciphyllum moss peat bank, the vertical accumulation rate of peat was 3.9 mm yr−1 over the last 30 years. Before the industrial revolution, rates of peat accumulation in all cores were much lower, at around 0.6–1 mm yr−1. Carbon-13 discrimination (Δ), corrected for background and anthropogenic source inputs, was used to develop a predictive model for CO 2 assimilation. Between 1680 and 1900, there had been a gradual increase in Δ, and hence assimilation rate. Since 1800, assimilation has also been stimulated by the changes in atmospheric CO 2 concentration, but a recent decline in Δ (over the past 50–100 years) can perhaps be attributed to documented changes in temperature and/or precipitation. The overall increase in CO 2 assimilation rate (13C proxy) and enhanced C accumulation (14C proxy) are consistent with warmer and wetter conditions currently generating higher growth rates than at any time in the past three millennia, with the decline in Δ perhaps compensated by a longer growing season. Article in Journal/Newspaper Antarc* Antarctic Antarctica Signy Island Natural Environment Research Council: NERC Open Research Archive Antarctic Signy Island ENVELOPE(-45.595,-45.595,-60.708,-60.708) Global Change Biology 18 10 3112 3124 |
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Open Polar |
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Natural Environment Research Council: NERC Open Research Archive |
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ftnerc |
language |
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description |
Signy Island, maritime Antarctic, lies within the region of the Southern Hemisphere that is currently experiencing the most rapid rates of environmental change. In this study, peat cores up to 2 m in depth from four moss banks on Signy Island were used to reconstruct changes in moss growth and climatic characteristics over the late Holocene. Measurements included radiocarbon dating (to determine peat accumulation rates) and stable carbon isotope composition of moss cellulose (to estimate photosynthetic limitation by CO 2 supply and model CO 2 assimilation rate). For at least one intensively 14C-dated Chorisodontium aciphyllum moss peat bank, the vertical accumulation rate of peat was 3.9 mm yr−1 over the last 30 years. Before the industrial revolution, rates of peat accumulation in all cores were much lower, at around 0.6–1 mm yr−1. Carbon-13 discrimination (Δ), corrected for background and anthropogenic source inputs, was used to develop a predictive model for CO 2 assimilation. Between 1680 and 1900, there had been a gradual increase in Δ, and hence assimilation rate. Since 1800, assimilation has also been stimulated by the changes in atmospheric CO 2 concentration, but a recent decline in Δ (over the past 50–100 years) can perhaps be attributed to documented changes in temperature and/or precipitation. The overall increase in CO 2 assimilation rate (13C proxy) and enhanced C accumulation (14C proxy) are consistent with warmer and wetter conditions currently generating higher growth rates than at any time in the past three millennia, with the decline in Δ perhaps compensated by a longer growing season. |
format |
Article in Journal/Newspaper |
author |
Royles, Jessica Ogée, Jérôme Wingate, Lisa Hodgson, Dominic A. Convey, Peter Griffiths, Howard |
spellingShingle |
Royles, Jessica Ogée, Jérôme Wingate, Lisa Hodgson, Dominic A. Convey, Peter Griffiths, Howard Carbon isotope evidence for recent climate-related enhancement of CO2 assimilation and peat accumulation rates in Antarctica |
author_facet |
Royles, Jessica Ogée, Jérôme Wingate, Lisa Hodgson, Dominic A. Convey, Peter Griffiths, Howard |
author_sort |
Royles, Jessica |
title |
Carbon isotope evidence for recent climate-related enhancement of CO2 assimilation and peat accumulation rates in Antarctica |
title_short |
Carbon isotope evidence for recent climate-related enhancement of CO2 assimilation and peat accumulation rates in Antarctica |
title_full |
Carbon isotope evidence for recent climate-related enhancement of CO2 assimilation and peat accumulation rates in Antarctica |
title_fullStr |
Carbon isotope evidence for recent climate-related enhancement of CO2 assimilation and peat accumulation rates in Antarctica |
title_full_unstemmed |
Carbon isotope evidence for recent climate-related enhancement of CO2 assimilation and peat accumulation rates in Antarctica |
title_sort |
carbon isotope evidence for recent climate-related enhancement of co2 assimilation and peat accumulation rates in antarctica |
publisher |
Blackwell |
publishDate |
2012 |
url |
http://nora.nerc.ac.uk/id/eprint/17902/ http://onlinelibrary.wiley.com/doi/10.1111/j.1365-2486.2012.02750.x/abstract |
long_lat |
ENVELOPE(-45.595,-45.595,-60.708,-60.708) |
geographic |
Antarctic Signy Island |
geographic_facet |
Antarctic Signy Island |
genre |
Antarc* Antarctic Antarctica Signy Island |
genre_facet |
Antarc* Antarctic Antarctica Signy Island |
op_relation |
Royles, Jessica orcid:0000-0003-0489-6863 Ogée, Jérôme; Wingate, Lisa; Hodgson, Dominic A. orcid:0000-0002-3841-3746 Convey, Peter orcid:0000-0001-8497-9903 Griffiths, Howard. 2012 Carbon isotope evidence for recent climate-related enhancement of CO2 assimilation and peat accumulation rates in Antarctica. Global Change Biology, 18 (10). 3112-3124. https://doi.org/10.1111/j.1365-2486.2012.02750.x <https://doi.org/10.1111/j.1365-2486.2012.02750.x> |
op_doi |
https://doi.org/10.1111/j.1365-2486.2012.02750.x |
container_title |
Global Change Biology |
container_volume |
18 |
container_issue |
10 |
container_start_page |
3112 |
op_container_end_page |
3124 |
_version_ |
1766216483965239296 |