Carbon isotope evidence for recent climate‐related enhancement of <scp>CO</scp> 2 assimilation and peat accumulation rates in Antarctica
Abstract 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...
Published in: | Global Change Biology |
---|---|
Main Authors: | , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Wiley
2012
|
Subjects: | |
Online Access: | http://dx.doi.org/10.1111/j.1365-2486.2012.02750.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1365-2486.2012.02750.x https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1365-2486.2012.02750.x https://onlinelibrary.wiley.com/doi/full-xml/10.1111/j.1365-2486.2012.02750.x |
id |
crwiley:10.1111/j.1365-2486.2012.02750.x |
---|---|
record_format |
openpolar |
spelling |
crwiley:10.1111/j.1365-2486.2012.02750.x 2024-03-31T07:48:32+00:00 Carbon isotope evidence for recent climate‐related enhancement of <scp>CO</scp> 2 assimilation and peat accumulation rates in Antarctica Royles, Jessica Ogée, Jérôme Wingate, Lisa Hodgson, Dominic A. Convey, Peter Griffiths, Howard 2012 http://dx.doi.org/10.1111/j.1365-2486.2012.02750.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1365-2486.2012.02750.x https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1365-2486.2012.02750.x https://onlinelibrary.wiley.com/doi/full-xml/10.1111/j.1365-2486.2012.02750.x en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Global Change Biology volume 18, issue 10, page 3112-3124 ISSN 1354-1013 1365-2486 General Environmental Science Ecology Environmental Chemistry Global and Planetary Change journal-article 2012 crwiley https://doi.org/10.1111/j.1365-2486.2012.02750.x 2024-03-04T13:00:35Z Abstract 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 14 C‐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 ( 13 C proxy) and enhanced C accumulation ( 14 C 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 Wiley Online Library Antarctic Signy Island ENVELOPE(-45.595,-45.595,-60.708,-60.708) Global Change Biology 18 10 3112 3124 |
institution |
Open Polar |
collection |
Wiley Online Library |
op_collection_id |
crwiley |
language |
English |
topic |
General Environmental Science Ecology Environmental Chemistry Global and Planetary Change |
spellingShingle |
General Environmental Science Ecology Environmental Chemistry Global and Planetary Change Royles, Jessica Ogée, Jérôme Wingate, Lisa Hodgson, Dominic A. Convey, Peter Griffiths, Howard Carbon isotope evidence for recent climate‐related enhancement of <scp>CO</scp> 2 assimilation and peat accumulation rates in Antarctica |
topic_facet |
General Environmental Science Ecology Environmental Chemistry Global and Planetary Change |
description |
Abstract 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 14 C‐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 ( 13 C proxy) and enhanced C accumulation ( 14 C 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 |
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 <scp>CO</scp> 2 assimilation and peat accumulation rates in Antarctica |
title_short |
Carbon isotope evidence for recent climate‐related enhancement of <scp>CO</scp> 2 assimilation and peat accumulation rates in Antarctica |
title_full |
Carbon isotope evidence for recent climate‐related enhancement of <scp>CO</scp> 2 assimilation and peat accumulation rates in Antarctica |
title_fullStr |
Carbon isotope evidence for recent climate‐related enhancement of <scp>CO</scp> 2 assimilation and peat accumulation rates in Antarctica |
title_full_unstemmed |
Carbon isotope evidence for recent climate‐related enhancement of <scp>CO</scp> 2 assimilation and peat accumulation rates in Antarctica |
title_sort |
carbon isotope evidence for recent climate‐related enhancement of <scp>co</scp> 2 assimilation and peat accumulation rates in antarctica |
publisher |
Wiley |
publishDate |
2012 |
url |
http://dx.doi.org/10.1111/j.1365-2486.2012.02750.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1365-2486.2012.02750.x https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1365-2486.2012.02750.x https://onlinelibrary.wiley.com/doi/full-xml/10.1111/j.1365-2486.2012.02750.x |
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_source |
Global Change Biology volume 18, issue 10, page 3112-3124 ISSN 1354-1013 1365-2486 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
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_ |
1795032637394386944 |