Regional Climate Change Recorded in Moss Oxygen and Carbon Isotopes from a Late Holocene Peat Archive in the Western Antarctic Peninsula
The Antarctic Peninsula (AP) climate is characterized by a high degree of variability, which poses a problem when attempting to put modern change in the context of natural variation. Therefore, novel methods are required to disentangle sometimes conflicting climate records from the region. In recent...
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ftmdpi:oai:mdpi.com:/2076-3263/9/7/282/ 2023-08-20T04:01:11+02:00 Regional Climate Change Recorded in Moss Oxygen and Carbon Isotopes from a Late Holocene Peat Archive in the Western Antarctic Peninsula Jonathan M. Stelling Zicheng Yu agris 2019-06-26 application/pdf https://doi.org/10.3390/geosciences9070282 EN eng Multidisciplinary Digital Publishing Institute Geophysics https://dx.doi.org/10.3390/geosciences9070282 https://creativecommons.org/licenses/by/4.0/ Geosciences; Volume 9; Issue 7; Pages: 282 stable isotopes paleoclimate Antarctic Peninsula hydroclimate temperature Chorisodontium aciphyllum Text 2019 ftmdpi https://doi.org/10.3390/geosciences9070282 2023-07-31T22:23:17Z The Antarctic Peninsula (AP) climate is characterized by a high degree of variability, which poses a problem when attempting to put modern change in the context of natural variation. Therefore, novel methods are required to disentangle sometimes conflicting climate records from the region. In recent years, the development of Antarctic moss-cellulose isotopes as a proxy for summer terrestrial growing conditions has become more widespread, with the isotopes Δ13C and δ18O reflecting moss productivity and peatbank moisture conditions, respectively. Here, we used a combined Δ13C and δ18O isotope analysis of moss Chorisodontium aciphyllum cellulose from a peatbank located on Litchfield Island in the western AP to document changes in climate over the last 1700 years. High Δ13C values (>15‰) indicate warm and productive conditions on Litchfield Island from 1600 to 1350 cal yr BP (350 to 600 AD) and over the last 100 years. The δ18O record shows two distinct intervals of dry conditions at 1350–1000 cal yr BP (600–950 AD) and at 500–0 cal yr BP (1450–1950 AD). Our record indicates that terrestrial ecosystems in the AP have responded to regional climate driven by atmospheric circulation, such as the southern annular mode (SAM) and, to a lesser extent, changes in ocean circulation. Text Antarc* Antarctic Antarctic Peninsula Litchfield Island MDPI Open Access Publishing Antarctic The Antarctic Antarctic Peninsula Litchfield ENVELOPE(-64.100,-64.100,-64.783,-64.783) Litchfield Island ENVELOPE(-64.091,-64.091,-64.771,-64.771) Geosciences 9 7 282 |
institution |
Open Polar |
collection |
MDPI Open Access Publishing |
op_collection_id |
ftmdpi |
language |
English |
topic |
stable isotopes paleoclimate Antarctic Peninsula hydroclimate temperature Chorisodontium aciphyllum |
spellingShingle |
stable isotopes paleoclimate Antarctic Peninsula hydroclimate temperature Chorisodontium aciphyllum Jonathan M. Stelling Zicheng Yu Regional Climate Change Recorded in Moss Oxygen and Carbon Isotopes from a Late Holocene Peat Archive in the Western Antarctic Peninsula |
topic_facet |
stable isotopes paleoclimate Antarctic Peninsula hydroclimate temperature Chorisodontium aciphyllum |
description |
The Antarctic Peninsula (AP) climate is characterized by a high degree of variability, which poses a problem when attempting to put modern change in the context of natural variation. Therefore, novel methods are required to disentangle sometimes conflicting climate records from the region. In recent years, the development of Antarctic moss-cellulose isotopes as a proxy for summer terrestrial growing conditions has become more widespread, with the isotopes Δ13C and δ18O reflecting moss productivity and peatbank moisture conditions, respectively. Here, we used a combined Δ13C and δ18O isotope analysis of moss Chorisodontium aciphyllum cellulose from a peatbank located on Litchfield Island in the western AP to document changes in climate over the last 1700 years. High Δ13C values (>15‰) indicate warm and productive conditions on Litchfield Island from 1600 to 1350 cal yr BP (350 to 600 AD) and over the last 100 years. The δ18O record shows two distinct intervals of dry conditions at 1350–1000 cal yr BP (600–950 AD) and at 500–0 cal yr BP (1450–1950 AD). Our record indicates that terrestrial ecosystems in the AP have responded to regional climate driven by atmospheric circulation, such as the southern annular mode (SAM) and, to a lesser extent, changes in ocean circulation. |
format |
Text |
author |
Jonathan M. Stelling Zicheng Yu |
author_facet |
Jonathan M. Stelling Zicheng Yu |
author_sort |
Jonathan M. Stelling |
title |
Regional Climate Change Recorded in Moss Oxygen and Carbon Isotopes from a Late Holocene Peat Archive in the Western Antarctic Peninsula |
title_short |
Regional Climate Change Recorded in Moss Oxygen and Carbon Isotopes from a Late Holocene Peat Archive in the Western Antarctic Peninsula |
title_full |
Regional Climate Change Recorded in Moss Oxygen and Carbon Isotopes from a Late Holocene Peat Archive in the Western Antarctic Peninsula |
title_fullStr |
Regional Climate Change Recorded in Moss Oxygen and Carbon Isotopes from a Late Holocene Peat Archive in the Western Antarctic Peninsula |
title_full_unstemmed |
Regional Climate Change Recorded in Moss Oxygen and Carbon Isotopes from a Late Holocene Peat Archive in the Western Antarctic Peninsula |
title_sort |
regional climate change recorded in moss oxygen and carbon isotopes from a late holocene peat archive in the western antarctic peninsula |
publisher |
Multidisciplinary Digital Publishing Institute |
publishDate |
2019 |
url |
https://doi.org/10.3390/geosciences9070282 |
op_coverage |
agris |
long_lat |
ENVELOPE(-64.100,-64.100,-64.783,-64.783) ENVELOPE(-64.091,-64.091,-64.771,-64.771) |
geographic |
Antarctic The Antarctic Antarctic Peninsula Litchfield Litchfield Island |
geographic_facet |
Antarctic The Antarctic Antarctic Peninsula Litchfield Litchfield Island |
genre |
Antarc* Antarctic Antarctic Peninsula Litchfield Island |
genre_facet |
Antarc* Antarctic Antarctic Peninsula Litchfield Island |
op_source |
Geosciences; Volume 9; Issue 7; Pages: 282 |
op_relation |
Geophysics https://dx.doi.org/10.3390/geosciences9070282 |
op_rights |
https://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.3390/geosciences9070282 |
container_title |
Geosciences |
container_volume |
9 |
container_issue |
7 |
container_start_page |
282 |
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1774723281335615488 |