Warmer–wetter climate drives shift in δD–δ18O composition of precipitation across the Queen Elizabeth Islands, Arctic Canada
We examine how recent increases in air temperature and precipitation, together with reductions in sea ice extent, may have affected the regional δD–δ18O composition of precipitation. In spring 2014, 80 snow samples were collected from six glaciers and ice caps across the Queen Elizabeth Islands, and...
Published in: | Arctic Science |
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Canadian Science Publishing
2021
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Online Access: | https://doi.org/10.1139/as-2020-0009 https://doaj.org/article/cfc9e57ac8f84bc2ae4e3475aa89f96b |
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fttriple:oai:gotriple.eu:oai:doaj.org/article:cfc9e57ac8f84bc2ae4e3475aa89f96b 2023-05-15T14:22:19+02:00 Warmer–wetter climate drives shift in δD–δ18O composition of precipitation across the Queen Elizabeth Islands, Arctic Canada Luke Copland Denis Lacelle David Fisher Frances Delaney Laura Thomson Brittany Main David Burgess 2021-03-01 https://doi.org/10.1139/as-2020-0009 https://doaj.org/article/cfc9e57ac8f84bc2ae4e3475aa89f96b en fr eng fre Canadian Science Publishing doi:10.1139/as-2020-0009 2368-7460 https://doaj.org/article/cfc9e57ac8f84bc2ae4e3475aa89f96b undefined Arctic Science, Vol 7, Iss 1, Pp 136-157 (2021) oxygen isotopes snow ice cores climate change geo envir Journal Article https://vocabularies.coar-repositories.org/resource_types/c_6501/ 2021 fttriple https://doi.org/10.1139/as-2020-0009 2023-01-22T18:19:40Z We examine how recent increases in air temperature and precipitation, together with reductions in sea ice extent, may have affected the regional δD–δ18O composition of precipitation. In spring 2014, 80 snow samples were collected from six glaciers and ice caps across the Queen Elizabeth Islands, and in 2009 and 2014, two shallow ice cores were collected from Agassiz Ice Cap and White Glacier, respectively. The snow samples showed average δ18O values from 2013 to 2014 to be approximately 2‰–3‰ higher than those recorded in 1973–1974 in nearby locations, with the ice cores showing similar trends in δ18O values. A zonal average water isotope model was used to help understand the causes of the increased δ18O values, using inputs calibrated for observed changes in temperature, vapour flux, and sea ice extent. Model results indicate that atmospheric temperature changes account for <1‰ of the observed change in δ18O values, and that changes in local water input and precipitation driven by changes in sea ice extent only have an effect in coastal regions. Enhanced meridional vapour flux to the Queen Elizabeth Islands is, therefore, also required to explain the observed increases in δ18O values, with fluxes ∼7% higher today than in the 1970s, consistent with the change in precipitation. Article in Journal/Newspaper Arctic Arctic Climate change glacier* Ice cap Queen Elizabeth Islands Sea ice Unknown Agassiz Ice Cap ENVELOPE(-75.996,-75.996,80.252,80.252) Arctic Canada White Glacier ENVELOPE(-90.667,-90.667,79.447,79.447) Arctic Science 7 1 136 157 |
institution |
Open Polar |
collection |
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op_collection_id |
fttriple |
language |
English French |
topic |
oxygen isotopes snow ice cores climate change geo envir |
spellingShingle |
oxygen isotopes snow ice cores climate change geo envir Luke Copland Denis Lacelle David Fisher Frances Delaney Laura Thomson Brittany Main David Burgess Warmer–wetter climate drives shift in δD–δ18O composition of precipitation across the Queen Elizabeth Islands, Arctic Canada |
topic_facet |
oxygen isotopes snow ice cores climate change geo envir |
description |
We examine how recent increases in air temperature and precipitation, together with reductions in sea ice extent, may have affected the regional δD–δ18O composition of precipitation. In spring 2014, 80 snow samples were collected from six glaciers and ice caps across the Queen Elizabeth Islands, and in 2009 and 2014, two shallow ice cores were collected from Agassiz Ice Cap and White Glacier, respectively. The snow samples showed average δ18O values from 2013 to 2014 to be approximately 2‰–3‰ higher than those recorded in 1973–1974 in nearby locations, with the ice cores showing similar trends in δ18O values. A zonal average water isotope model was used to help understand the causes of the increased δ18O values, using inputs calibrated for observed changes in temperature, vapour flux, and sea ice extent. Model results indicate that atmospheric temperature changes account for <1‰ of the observed change in δ18O values, and that changes in local water input and precipitation driven by changes in sea ice extent only have an effect in coastal regions. Enhanced meridional vapour flux to the Queen Elizabeth Islands is, therefore, also required to explain the observed increases in δ18O values, with fluxes ∼7% higher today than in the 1970s, consistent with the change in precipitation. |
format |
Article in Journal/Newspaper |
author |
Luke Copland Denis Lacelle David Fisher Frances Delaney Laura Thomson Brittany Main David Burgess |
author_facet |
Luke Copland Denis Lacelle David Fisher Frances Delaney Laura Thomson Brittany Main David Burgess |
author_sort |
Luke Copland |
title |
Warmer–wetter climate drives shift in δD–δ18O composition of precipitation across the Queen Elizabeth Islands, Arctic Canada |
title_short |
Warmer–wetter climate drives shift in δD–δ18O composition of precipitation across the Queen Elizabeth Islands, Arctic Canada |
title_full |
Warmer–wetter climate drives shift in δD–δ18O composition of precipitation across the Queen Elizabeth Islands, Arctic Canada |
title_fullStr |
Warmer–wetter climate drives shift in δD–δ18O composition of precipitation across the Queen Elizabeth Islands, Arctic Canada |
title_full_unstemmed |
Warmer–wetter climate drives shift in δD–δ18O composition of precipitation across the Queen Elizabeth Islands, Arctic Canada |
title_sort |
warmer–wetter climate drives shift in δd–δ18o composition of precipitation across the queen elizabeth islands, arctic canada |
publisher |
Canadian Science Publishing |
publishDate |
2021 |
url |
https://doi.org/10.1139/as-2020-0009 https://doaj.org/article/cfc9e57ac8f84bc2ae4e3475aa89f96b |
long_lat |
ENVELOPE(-75.996,-75.996,80.252,80.252) ENVELOPE(-90.667,-90.667,79.447,79.447) |
geographic |
Agassiz Ice Cap Arctic Canada White Glacier |
geographic_facet |
Agassiz Ice Cap Arctic Canada White Glacier |
genre |
Arctic Arctic Climate change glacier* Ice cap Queen Elizabeth Islands Sea ice |
genre_facet |
Arctic Arctic Climate change glacier* Ice cap Queen Elizabeth Islands Sea ice |
op_source |
Arctic Science, Vol 7, Iss 1, Pp 136-157 (2021) |
op_relation |
doi:10.1139/as-2020-0009 2368-7460 https://doaj.org/article/cfc9e57ac8f84bc2ae4e3475aa89f96b |
op_rights |
undefined |
op_doi |
https://doi.org/10.1139/as-2020-0009 |
container_title |
Arctic Science |
container_volume |
7 |
container_issue |
1 |
container_start_page |
136 |
op_container_end_page |
157 |
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1766294953651077120 |