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...
Published in: | Climate of the Past |
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Online Access: | http://hdl.handle.net/10278/3694429 https://doi.org/10.5194/cp-13-1609-2017 |
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ftuniveneziairis:oai:iris.unive.it:10278/3694429 2024-04-14T08:03:04+00:00 Antarctic climate variability on regional and continental scales over the last 2000 years Stenni, Barbara Curran, Mark A. J. Abram, Nerilie J. Orsi, Anais Goursaud, Sentia Masson-Delmotte, Valerie Neukom, Raphael Goosse, Hugues Divine, Dmitry van Ommen, Tas Steig, Eric J. Dixon, Daniel A. Thomas, Elizabeth R. Bertler, Nancy A. N. Isaksson, Elisabeth Ekaykin, Alexey Werner, Martin Frezzotti, Massimo Stenni, Barbara Curran, Mark A. J. Abram, Nerilie J. Orsi, Anai Goursaud, Sentia Masson-Delmotte, Valerie Neukom, Raphael Goosse, Hugue Divine, Dmitry van Ommen, Ta Steig, Eric J. Dixon, Daniel A. Thomas, Elizabeth R. Bertler, Nancy A. N. Isaksson, Elisabeth Ekaykin, Alexey Werner, Martin Frezzotti, Massimo 2017 http://hdl.handle.net/10278/3694429 https://doi.org/10.5194/cp-13-1609-2017 eng eng info:eu-repo/semantics/altIdentifier/wos/WOS:000415760500002 volume:13 issue:11 firstpage:1609 lastpage:1634 numberofpages:26 journal:CLIMATE OF THE PAST http://hdl.handle.net/10278/3694429 doi:10.5194/cp-13-1609-2017 info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-85034568932 info:eu-repo/semantics/openAccess HEMISPHERE SURFACE CLIMATE ICE-SHEET SURFACE EAST ANTARCTICA ISOTOPIC COMPOSITION SOUTHERN-HEMISPHERE WEST ANTARCTICA STABLE-ISOTOPES PAST MILLENNIUM WATER-VAPOR TEMPERATURE VARIABILITY Settore GEO/08 - Geochimica e Vulcanologia info:eu-repo/semantics/article 2017 ftuniveneziairis https://doi.org/10.5194/cp-13-1609-2017 2024-03-21T18:06:12Z 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 (delta O-18) 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) a temperature scaling based on the delta O-18-temperature 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) a temperature scaling of the isotopic normalized anomalies to the variance of the regional reanalysis temperature and (iii) a composite-plus-scaling approach used in a previous continent-scale reconstruction of Antarctic temperature since 1 CE but applied to the new Antarctic ice core database. Our new reconstructions confirm a significant 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 ... Article in Journal/Newspaper Antarc* Antarctic Antarctic Peninsula Antarctica Dronning Maud Land East Antarctica ice core Ice Sheet Weddell Sea West Antarctica Wilkes Land Università Ca’ Foscari Venezia: ARCA (Archivio Istituzionale della Ricerca) 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 |
Università Ca’ Foscari Venezia: ARCA (Archivio Istituzionale della Ricerca) |
op_collection_id |
ftuniveneziairis |
language |
English |
topic |
HEMISPHERE SURFACE CLIMATE ICE-SHEET SURFACE EAST ANTARCTICA ISOTOPIC COMPOSITION SOUTHERN-HEMISPHERE WEST ANTARCTICA STABLE-ISOTOPES PAST MILLENNIUM WATER-VAPOR TEMPERATURE VARIABILITY Settore GEO/08 - Geochimica e Vulcanologia |
spellingShingle |
HEMISPHERE SURFACE CLIMATE ICE-SHEET SURFACE EAST ANTARCTICA ISOTOPIC COMPOSITION SOUTHERN-HEMISPHERE WEST ANTARCTICA STABLE-ISOTOPES PAST MILLENNIUM WATER-VAPOR TEMPERATURE VARIABILITY Settore GEO/08 - Geochimica e Vulcanologia Stenni, Barbara Curran, Mark A. J. Abram, Nerilie J. Orsi, Anais Goursaud, Sentia Masson-Delmotte, Valerie Neukom, Raphael Goosse, Hugues Divine, Dmitry van Ommen, Tas Steig, Eric J. Dixon, Daniel A. Thomas, Elizabeth R. Bertler, Nancy A. N. Isaksson, Elisabeth Ekaykin, Alexey Werner, Martin Frezzotti, Massimo Antarctic climate variability on regional and continental scales over the last 2000 years |
topic_facet |
HEMISPHERE SURFACE CLIMATE ICE-SHEET SURFACE EAST ANTARCTICA ISOTOPIC COMPOSITION SOUTHERN-HEMISPHERE WEST ANTARCTICA STABLE-ISOTOPES PAST MILLENNIUM WATER-VAPOR TEMPERATURE VARIABILITY Settore GEO/08 - Geochimica e Vulcanologia |
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 (delta O-18) 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) a temperature scaling based on the delta O-18-temperature 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) a temperature scaling of the isotopic normalized anomalies to the variance of the regional reanalysis temperature and (iii) a composite-plus-scaling approach used in a previous continent-scale reconstruction of Antarctic temperature since 1 CE but applied to the new Antarctic ice core database. Our new reconstructions confirm a significant 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 ... |
author2 |
Stenni, Barbara Curran, Mark A. J. Abram, Nerilie J. Orsi, Anai Goursaud, Sentia Masson-Delmotte, Valerie Neukom, Raphael Goosse, Hugue Divine, Dmitry van Ommen, Ta Steig, Eric J. Dixon, Daniel A. Thomas, Elizabeth R. Bertler, Nancy A. N. Isaksson, Elisabeth Ekaykin, Alexey Werner, Martin Frezzotti, Massimo |
format |
Article in Journal/Newspaper |
author |
Stenni, Barbara Curran, Mark A. J. Abram, Nerilie J. Orsi, Anais Goursaud, Sentia Masson-Delmotte, Valerie Neukom, Raphael Goosse, Hugues Divine, Dmitry van Ommen, Tas Steig, Eric J. Dixon, Daniel A. Thomas, Elizabeth R. Bertler, Nancy A. N. Isaksson, Elisabeth Ekaykin, Alexey Werner, Martin Frezzotti, Massimo |
author_facet |
Stenni, Barbara Curran, Mark A. J. Abram, Nerilie J. Orsi, Anais Goursaud, Sentia Masson-Delmotte, Valerie Neukom, Raphael Goosse, Hugues Divine, Dmitry van Ommen, Tas Steig, Eric J. Dixon, Daniel A. Thomas, Elizabeth R. Bertler, Nancy A. N. Isaksson, Elisabeth Ekaykin, Alexey Werner, Martin Frezzotti, Massimo |
author_sort |
Stenni, Barbara |
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 |
publishDate |
2017 |
url |
http://hdl.handle.net/10278/3694429 https://doi.org/10.5194/cp-13-1609-2017 |
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 |
info:eu-repo/semantics/altIdentifier/wos/WOS:000415760500002 volume:13 issue:11 firstpage:1609 lastpage:1634 numberofpages:26 journal:CLIMATE OF THE PAST http://hdl.handle.net/10278/3694429 doi:10.5194/cp-13-1609-2017 info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-85034568932 |
op_rights |
info:eu-repo/semantics/openAccess |
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 |
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1796298181907054592 |