Drought variability in the eastern Australia and New Zealand summer drought atlas (ANZDA, CE 1500–2012) modulated by the Interdecadal Pacific Oscillation
Agricultural production across eastern Australia and New Zealand is highly vulnerable to drought, but there is a dearth of observational drought information prior to CE 1850. Using a comprehensive network of 176 drought-sensitive tree-ring chronologies and one coral series, we report the first South...
| Main Authors: | , , , , , , , , , |
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| Format: | Article |
| Language: | English |
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IOP Publishing
2015-01-01
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| Series: | Environmental Research Letters |
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| Online Access: | https://doi.org/10.1088/1748-9326/10/12/124002 |
| _version_ | 1797748552944844800 |
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| author | Jonathan G Palmer Edward R Cook Chris S M Turney Kathy Allen Pavla Fenwick Benjamin I Cook Alison O’Donnell Janice Lough Pauline Grierson Patrick Baker |
| author_facet | Jonathan G Palmer Edward R Cook Chris S M Turney Kathy Allen Pavla Fenwick Benjamin I Cook Alison O’Donnell Janice Lough Pauline Grierson Patrick Baker |
| author_sort | Jonathan G Palmer |
| collection | DOAJ |
| description | Agricultural production across eastern Australia and New Zealand is highly vulnerable to drought, but there is a dearth of observational drought information prior to CE 1850. Using a comprehensive network of 176 drought-sensitive tree-ring chronologies and one coral series, we report the first Southern Hemisphere gridded drought atlas extending back to CE 1500. The austral summer (December–February) Palmer drought sensitivity index reconstruction accurately reproduces historically documented drought events associated with the first European settlement of Australia in CE 1788, and the leading principal component explains over 50% of the underlying variance. This leading mode of variability is strongly related to the Interdecadal Pacific Oscillation tripole index (IPO), with a strong and robust antiphase correlation between (1) eastern Australia and the New Zealand North Island and (2) the South Island. Reported positive, negative, and neutral phases of the IPO are consistently reconstructed by the drought atlas although the relationship since CE 1976 appears to have weakened. |
| first_indexed | 2024-03-12T16:07:25Z |
| format | Article |
| id | doaj.art-4d8f99a10e1542e98188d2e6fb040765 |
| institution | Directory Open Access Journal |
| issn | 1748-9326 |
| language | English |
| last_indexed | 2024-03-12T16:07:25Z |
| publishDate | 2015-01-01 |
| publisher | IOP Publishing |
| record_format | Article |
| series | Environmental Research Letters |
| spelling | doaj.art-4d8f99a10e1542e98188d2e6fb0407652023-08-09T14:18:16ZengIOP PublishingEnvironmental Research Letters1748-93262015-01-01101212400210.1088/1748-9326/10/12/124002Drought variability in the eastern Australia and New Zealand summer drought atlas (ANZDA, CE 1500–2012) modulated by the Interdecadal Pacific OscillationJonathan G Palmer0Edward R Cook1Chris S M Turney2Kathy Allen3Pavla Fenwick4Benjamin I Cook5Alison O’Donnell6Janice Lough7Pauline Grierson8Patrick Baker9Climate Change Research Centre, School of Biological, Earth and Environmental Sciences, University of New South Wales , Sydney, NSW 2015, AustraliaLamont-Doherty Earth Observatory of Columbia University , Palisades, NY 10964, USAClimate Change Research Centre, School of Biological, Earth and Environmental Sciences, University of New South Wales , Sydney, NSW 2015, AustraliaSchool of Ecosystem and Forest Sciences, University of Melbourne , Richmond, Victoria, 3121, AustraliaGondwana Tree-ring Laboratory, P O Box 14, Little River, Canterbury, 7546, New ZealandLamont-Doherty Earth Observatory of Columbia University , Palisades, NY 10964, USA; NASA Goddard Institute for Space Studies, 2880 Broadway, New York, NY 10025, USAEcosystems Research Group, School of Plant Biology, The University of Western Australia , Crawley, WA 2016, AustraliaAustralian Institute of Marine Science, PMB 3, Townsville MC, Townsville, QLD 4810, AustraliaEcosystems Research Group, School of Plant Biology, The University of Western Australia , Crawley, WA 2016, AustraliaSchool of Ecosystem and Forest Sciences, University of Melbourne , Richmond, Victoria, 3121, AustraliaAgricultural production across eastern Australia and New Zealand is highly vulnerable to drought, but there is a dearth of observational drought information prior to CE 1850. Using a comprehensive network of 176 drought-sensitive tree-ring chronologies and one coral series, we report the first Southern Hemisphere gridded drought atlas extending back to CE 1500. The austral summer (December–February) Palmer drought sensitivity index reconstruction accurately reproduces historically documented drought events associated with the first European settlement of Australia in CE 1788, and the leading principal component explains over 50% of the underlying variance. This leading mode of variability is strongly related to the Interdecadal Pacific Oscillation tripole index (IPO), with a strong and robust antiphase correlation between (1) eastern Australia and the New Zealand North Island and (2) the South Island. Reported positive, negative, and neutral phases of the IPO are consistently reconstructed by the drought atlas although the relationship since CE 1976 appears to have weakened.https://doi.org/10.1088/1748-9326/10/12/124002gridded summer drought atlaseastern AustraliapalaeoclimatologyInterdecadal Pacific Oscillation (IPO)multi-decadal hydroclimate variability |
| spellingShingle | Jonathan G Palmer Edward R Cook Chris S M Turney Kathy Allen Pavla Fenwick Benjamin I Cook Alison O’Donnell Janice Lough Pauline Grierson Patrick Baker Drought variability in the eastern Australia and New Zealand summer drought atlas (ANZDA, CE 1500–2012) modulated by the Interdecadal Pacific Oscillation Environmental Research Letters gridded summer drought atlas eastern Australia palaeoclimatology Interdecadal Pacific Oscillation (IPO) multi-decadal hydroclimate variability |
| title | Drought variability in the eastern Australia and New Zealand summer drought atlas (ANZDA, CE 1500–2012) modulated by the Interdecadal Pacific Oscillation |
| title_full | Drought variability in the eastern Australia and New Zealand summer drought atlas (ANZDA, CE 1500–2012) modulated by the Interdecadal Pacific Oscillation |
| title_fullStr | Drought variability in the eastern Australia and New Zealand summer drought atlas (ANZDA, CE 1500–2012) modulated by the Interdecadal Pacific Oscillation |
| title_full_unstemmed | Drought variability in the eastern Australia and New Zealand summer drought atlas (ANZDA, CE 1500–2012) modulated by the Interdecadal Pacific Oscillation |
| title_short | Drought variability in the eastern Australia and New Zealand summer drought atlas (ANZDA, CE 1500–2012) modulated by the Interdecadal Pacific Oscillation |
| title_sort | drought variability in the eastern australia and new zealand summer drought atlas anzda ce 1500 2012 modulated by the interdecadal pacific oscillation |
| topic | gridded summer drought atlas eastern Australia palaeoclimatology Interdecadal Pacific Oscillation (IPO) multi-decadal hydroclimate variability |
| url | https://doi.org/10.1088/1748-9326/10/12/124002 |
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