Antarctic climate variability on regional and continental scales over the last 2000 years
Climate trends in the Antarctic region remain poorly characterized, owing to the brevity and scarcity of direct climate observations and the large magnitude of interannual to decadal-scale climate variability. Here, within the framework of the PAGES Antarctica2k working group, we build an enlarged d...
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Online Access: | https://doi.org/10.5194/cp-13-1609-2017 http://ecite.utas.edu.au/124004 |
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ftunivtasecite:oai:ecite.utas.edu.au:124004 2023-05-15T13:42:40+02:00 Antarctic climate variability on regional and continental scales over the last 2000 years Stenni, B Curran, MAJ Abram, NJ Orsi, A Goursaud, S Masson-Delmotte, V Neukom, R Goosse, H Divine, D van Ommen, T Steig, EJ Dixon, DA Thomas, ER Bertler, NAN Isaksson, E Ekaykin, A Werner, M Frezzotti, M 2017 application/pdf https://doi.org/10.5194/cp-13-1609-2017 http://ecite.utas.edu.au/124004 en eng Copernicus GmbH http://ecite.utas.edu.au/124004/1/Stenni et al 2017.pdf http://dx.doi.org/10.5194/cp-13-1609-2017 Stenni, B and Curran, MAJ and Abram, NJ and Orsi, A and Goursaud, S and Masson-Delmotte, V and Neukom, R and Goosse, H and Divine, D and van Ommen, T and Steig, EJ and Dixon, DA and Thomas, ER and Bertler, NAN and Isaksson, E and Ekaykin, A and Werner, M and Frezzotti, M, Antarctic climate variability on regional and continental scales over the last 2000 years, Climate of the Past, 13, (11) pp. 1609-1634. ISSN 1814-9324 (2017) [Refereed Article] http://ecite.utas.edu.au/124004 Earth Sciences Climate change science Climate change processes Refereed Article PeerReviewed 2017 ftunivtasecite https://doi.org/10.5194/cp-13-1609-2017 2022-08-29T22:17:14Z Climate trends in the Antarctic region remain poorly characterized, owing to the brevity and scarcity of direct climate observations and the large magnitude of interannual to decadal-scale climate variability. Here, within the framework of the PAGES Antarctica2k working group, we build an enlarged database of ice core water stable isotope records from Antarctica, consisting of 112 records. We produce both unweighted and weighted isotopic ( δ 18 O) composites and temperature reconstructions since 0 CE, binned at 5- and 10-year resolution, for seven climatically distinct regions covering the Antarctic continent. Following earlier work of the Antarctica2k working group, we also produce composites and reconstructions for the broader regions of East Antarctica, West Antarctica and the whole continent. We use three methods for our temperature reconstructions: (i) atemperature scaling based on the δ 18 Otemperature relationship output from an ECHAM5-wiso model simulation nudged to ERA-Interim atmospheric reanalyses from 1979 to 2013, and adjusted for the West Antarctic Ice Sheet region to borehole temperature data, (ii) atemperature scaling of the isotopic normalized anomalies to the variance of the regional reanalysis temperature and (iii) acomposite-plus-scaling approach used in aprevious continent-scale reconstruction of Antarctic temperature since 1 CE but applied to the new Antarctic ice core database. Our new reconstructions confirm asignificant cooling trend from 0 to 1900 CE across all Antarctic regions where records extend back into the 1st millennium, with the exception of the Wilkes Land coast and Weddell Sea coast regions. Within this long-term cooling trend from 0 to 1900 CE, we find that the warmest period occurs between 300 and 1000 CE, and the coldest interval occurs from 1200 to 1900 CE. Since 1900 CE, significant warming trends are identified for the West Antarctic Ice Sheet, the Dronning Maud Land coast and the Antarctic Peninsula regions, and these trends are robust across the distribution of ... Article in Journal/Newspaper Antarc* Antarctic Antarctic Peninsula Antarctica Dronning Maud Land East Antarctica ice core Ice Sheet Weddell Sea West Antarctica Wilkes Land eCite UTAS (University of Tasmania) Antarctic The Antarctic Antarctic Peninsula Weddell Sea East Antarctica Dronning Maud Land West Antarctica West Antarctic Ice Sheet Weddell Wilkes Land ENVELOPE(120.000,120.000,-69.000,-69.000) Climate of the Past 13 11 1609 1634 |
institution |
Open Polar |
collection |
eCite UTAS (University of Tasmania) |
op_collection_id |
ftunivtasecite |
language |
English |
topic |
Earth Sciences Climate change science Climate change processes |
spellingShingle |
Earth Sciences Climate change science Climate change processes Stenni, B Curran, MAJ Abram, NJ Orsi, A Goursaud, S Masson-Delmotte, V Neukom, R Goosse, H Divine, D van Ommen, T Steig, EJ Dixon, DA Thomas, ER Bertler, NAN Isaksson, E Ekaykin, A Werner, M Frezzotti, M Antarctic climate variability on regional and continental scales over the last 2000 years |
topic_facet |
Earth Sciences Climate change science Climate change processes |
description |
Climate trends in the Antarctic region remain poorly characterized, owing to the brevity and scarcity of direct climate observations and the large magnitude of interannual to decadal-scale climate variability. Here, within the framework of the PAGES Antarctica2k working group, we build an enlarged database of ice core water stable isotope records from Antarctica, consisting of 112 records. We produce both unweighted and weighted isotopic ( δ 18 O) composites and temperature reconstructions since 0 CE, binned at 5- and 10-year resolution, for seven climatically distinct regions covering the Antarctic continent. Following earlier work of the Antarctica2k working group, we also produce composites and reconstructions for the broader regions of East Antarctica, West Antarctica and the whole continent. We use three methods for our temperature reconstructions: (i) atemperature scaling based on the δ 18 Otemperature relationship output from an ECHAM5-wiso model simulation nudged to ERA-Interim atmospheric reanalyses from 1979 to 2013, and adjusted for the West Antarctic Ice Sheet region to borehole temperature data, (ii) atemperature scaling of the isotopic normalized anomalies to the variance of the regional reanalysis temperature and (iii) acomposite-plus-scaling approach used in aprevious continent-scale reconstruction of Antarctic temperature since 1 CE but applied to the new Antarctic ice core database. Our new reconstructions confirm asignificant cooling trend from 0 to 1900 CE across all Antarctic regions where records extend back into the 1st millennium, with the exception of the Wilkes Land coast and Weddell Sea coast regions. Within this long-term cooling trend from 0 to 1900 CE, we find that the warmest period occurs between 300 and 1000 CE, and the coldest interval occurs from 1200 to 1900 CE. Since 1900 CE, significant warming trends are identified for the West Antarctic Ice Sheet, the Dronning Maud Land coast and the Antarctic Peninsula regions, and these trends are robust across the distribution of ... |
format |
Article in Journal/Newspaper |
author |
Stenni, B Curran, MAJ Abram, NJ Orsi, A Goursaud, S Masson-Delmotte, V Neukom, R Goosse, H Divine, D van Ommen, T Steig, EJ Dixon, DA Thomas, ER Bertler, NAN Isaksson, E Ekaykin, A Werner, M Frezzotti, M |
author_facet |
Stenni, B Curran, MAJ Abram, NJ Orsi, A Goursaud, S Masson-Delmotte, V Neukom, R Goosse, H Divine, D van Ommen, T Steig, EJ Dixon, DA Thomas, ER Bertler, NAN Isaksson, E Ekaykin, A Werner, M Frezzotti, M |
author_sort |
Stenni, B |
title |
Antarctic climate variability on regional and continental scales over the last 2000 years |
title_short |
Antarctic climate variability on regional and continental scales over the last 2000 years |
title_full |
Antarctic climate variability on regional and continental scales over the last 2000 years |
title_fullStr |
Antarctic climate variability on regional and continental scales over the last 2000 years |
title_full_unstemmed |
Antarctic climate variability on regional and continental scales over the last 2000 years |
title_sort |
antarctic climate variability on regional and continental scales over the last 2000 years |
publisher |
Copernicus GmbH |
publishDate |
2017 |
url |
https://doi.org/10.5194/cp-13-1609-2017 http://ecite.utas.edu.au/124004 |
long_lat |
ENVELOPE(120.000,120.000,-69.000,-69.000) |
geographic |
Antarctic The Antarctic Antarctic Peninsula Weddell Sea East Antarctica Dronning Maud Land West Antarctica West Antarctic Ice Sheet Weddell Wilkes Land |
geographic_facet |
Antarctic The Antarctic Antarctic Peninsula Weddell Sea East Antarctica Dronning Maud Land West Antarctica West Antarctic Ice Sheet Weddell Wilkes Land |
genre |
Antarc* Antarctic Antarctic Peninsula Antarctica Dronning Maud Land East Antarctica ice core Ice Sheet Weddell Sea West Antarctica Wilkes Land |
genre_facet |
Antarc* Antarctic Antarctic Peninsula Antarctica Dronning Maud Land East Antarctica ice core Ice Sheet Weddell Sea West Antarctica Wilkes Land |
op_relation |
http://ecite.utas.edu.au/124004/1/Stenni et al 2017.pdf http://dx.doi.org/10.5194/cp-13-1609-2017 Stenni, B and Curran, MAJ and Abram, NJ and Orsi, A and Goursaud, S and Masson-Delmotte, V and Neukom, R and Goosse, H and Divine, D and van Ommen, T and Steig, EJ and Dixon, DA and Thomas, ER and Bertler, NAN and Isaksson, E and Ekaykin, A and Werner, M and Frezzotti, M, Antarctic climate variability on regional and continental scales over the last 2000 years, Climate of the Past, 13, (11) pp. 1609-1634. ISSN 1814-9324 (2017) [Refereed Article] http://ecite.utas.edu.au/124004 |
op_doi |
https://doi.org/10.5194/cp-13-1609-2017 |
container_title |
Climate of the Past |
container_volume |
13 |
container_issue |
11 |
container_start_page |
1609 |
op_container_end_page |
1634 |
_version_ |
1766171051970002944 |