Extending and understanding the South West Western Australian rainfall record using a snowfall reconstruction from Law Dome, East Antarctica
South West Western Australia (SWWA) has experienced a prolonged reduction in rainfall in recent decades, with associated reductions in regional water supply and residential and agricultural impacts. The cause of the reduction has been widely considered but remains unclear. The relatively short lengt...
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ftnonlinearchiv:oai:noa.gwlb.de:cop_mods_00058295 2023-05-15T13:37:33+02:00 Extending and understanding the South West Western Australian rainfall record using a snowfall reconstruction from Law Dome, East Antarctica Zheng, Yaowen Jong, Lenneke M. Phipps, Steven J. Roberts, Jason L. Moy, Andrew D. Curran, Mark A. J. van Ommen, Tas D. 2021-10 electronic https://doi.org/10.5194/cp-17-1973-2021 https://noa.gwlb.de/receive/cop_mods_00058295 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00057945/cp-17-1973-2021.pdf https://cp.copernicus.org/articles/17/1973/2021/cp-17-1973-2021.pdf eng eng Copernicus Publications Climate of the Past -- http://www.copernicus.org/EGU/cp/cp/published_papers.html -- http://www.bibliothek.uni-regensburg.de/ezeit/?2217985 -- 1814-9332 https://doi.org/10.5194/cp-17-1973-2021 https://noa.gwlb.de/receive/cop_mods_00058295 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00057945/cp-17-1973-2021.pdf https://cp.copernicus.org/articles/17/1973/2021/cp-17-1973-2021.pdf https://creativecommons.org/licenses/by/4.0/ uneingeschränkt info:eu-repo/semantics/openAccess CC-BY article Verlagsveröffentlichung article Text doc-type:article 2021 ftnonlinearchiv https://doi.org/10.5194/cp-17-1973-2021 2022-02-08T22:33:09Z South West Western Australia (SWWA) has experienced a prolonged reduction in rainfall in recent decades, with associated reductions in regional water supply and residential and agricultural impacts. The cause of the reduction has been widely considered but remains unclear. The relatively short length of the instrumental record limits long-term investigation. A previous proxy-based study used a statistically negative correlation between SWWA rainfall and snowfall from the Dome Summit South (DSS) ice core drilling site, Law Dome, East Antarctica, and concluded that the anomaly of recent decades is unprecedented over the ∼ 750-year period of the study (1250–2004 CE). Here, we extend the snow accumulation record to cover the period from 22 BCE to 2015 CE and derive a rainfall reconstruction over this extended period. This extended record confirms that the recent anomaly is unique in the period since 1250 CE and unusual over the full ∼ 2000-year period, with just two other earlier droughts of similar duration and intensity. The reconstruction shows that SWWA rainfall started to decrease around 1971 CE. Ensembles of climate model simulations are used to investigate the potential roles of natural variability and external climate drivers in explaining changes in SWWA rainfall. We find that anthropogenic greenhouse gases are likely to have contributed towards the SWWA rainfall drying trend after 1971 CE. However, natural variability may also have played a role in determining the timing and magnitude of the reduction in rainfall. Article in Journal/Newspaper Antarc* Antarctica East Antarctica ice core Niedersächsisches Online-Archiv NOA East Antarctica Law Dome ENVELOPE(112.833,112.833,-66.733,-66.733) Climate of the Past 17 5 1973 1987 |
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Open Polar |
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Niedersächsisches Online-Archiv NOA |
op_collection_id |
ftnonlinearchiv |
language |
English |
topic |
article Verlagsveröffentlichung |
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article Verlagsveröffentlichung Zheng, Yaowen Jong, Lenneke M. Phipps, Steven J. Roberts, Jason L. Moy, Andrew D. Curran, Mark A. J. van Ommen, Tas D. Extending and understanding the South West Western Australian rainfall record using a snowfall reconstruction from Law Dome, East Antarctica |
topic_facet |
article Verlagsveröffentlichung |
description |
South West Western Australia (SWWA) has experienced a prolonged reduction in rainfall in recent decades, with associated reductions in regional water supply and residential and agricultural impacts. The cause of the reduction has been widely considered but remains unclear. The relatively short length of the instrumental record limits long-term investigation. A previous proxy-based study used a statistically negative correlation between SWWA rainfall and snowfall from the Dome Summit South (DSS) ice core drilling site, Law Dome, East Antarctica, and concluded that the anomaly of recent decades is unprecedented over the ∼ 750-year period of the study (1250–2004 CE). Here, we extend the snow accumulation record to cover the period from 22 BCE to 2015 CE and derive a rainfall reconstruction over this extended period. This extended record confirms that the recent anomaly is unique in the period since 1250 CE and unusual over the full ∼ 2000-year period, with just two other earlier droughts of similar duration and intensity. The reconstruction shows that SWWA rainfall started to decrease around 1971 CE. Ensembles of climate model simulations are used to investigate the potential roles of natural variability and external climate drivers in explaining changes in SWWA rainfall. We find that anthropogenic greenhouse gases are likely to have contributed towards the SWWA rainfall drying trend after 1971 CE. However, natural variability may also have played a role in determining the timing and magnitude of the reduction in rainfall. |
format |
Article in Journal/Newspaper |
author |
Zheng, Yaowen Jong, Lenneke M. Phipps, Steven J. Roberts, Jason L. Moy, Andrew D. Curran, Mark A. J. van Ommen, Tas D. |
author_facet |
Zheng, Yaowen Jong, Lenneke M. Phipps, Steven J. Roberts, Jason L. Moy, Andrew D. Curran, Mark A. J. van Ommen, Tas D. |
author_sort |
Zheng, Yaowen |
title |
Extending and understanding the South West Western Australian rainfall record using a snowfall reconstruction from Law Dome, East Antarctica |
title_short |
Extending and understanding the South West Western Australian rainfall record using a snowfall reconstruction from Law Dome, East Antarctica |
title_full |
Extending and understanding the South West Western Australian rainfall record using a snowfall reconstruction from Law Dome, East Antarctica |
title_fullStr |
Extending and understanding the South West Western Australian rainfall record using a snowfall reconstruction from Law Dome, East Antarctica |
title_full_unstemmed |
Extending and understanding the South West Western Australian rainfall record using a snowfall reconstruction from Law Dome, East Antarctica |
title_sort |
extending and understanding the south west western australian rainfall record using a snowfall reconstruction from law dome, east antarctica |
publisher |
Copernicus Publications |
publishDate |
2021 |
url |
https://doi.org/10.5194/cp-17-1973-2021 https://noa.gwlb.de/receive/cop_mods_00058295 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00057945/cp-17-1973-2021.pdf https://cp.copernicus.org/articles/17/1973/2021/cp-17-1973-2021.pdf |
long_lat |
ENVELOPE(112.833,112.833,-66.733,-66.733) |
geographic |
East Antarctica Law Dome |
geographic_facet |
East Antarctica Law Dome |
genre |
Antarc* Antarctica East Antarctica ice core |
genre_facet |
Antarc* Antarctica East Antarctica ice core |
op_relation |
Climate of the Past -- http://www.copernicus.org/EGU/cp/cp/published_papers.html -- http://www.bibliothek.uni-regensburg.de/ezeit/?2217985 -- 1814-9332 https://doi.org/10.5194/cp-17-1973-2021 https://noa.gwlb.de/receive/cop_mods_00058295 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00057945/cp-17-1973-2021.pdf https://cp.copernicus.org/articles/17/1973/2021/cp-17-1973-2021.pdf |
op_rights |
https://creativecommons.org/licenses/by/4.0/ uneingeschränkt info:eu-repo/semantics/openAccess |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.5194/cp-17-1973-2021 |
container_title |
Climate of the Past |
container_volume |
17 |
container_issue |
5 |
container_start_page |
1973 |
op_container_end_page |
1987 |
_version_ |
1766093981599399936 |