Cargando…
Holocene El Niño–Southern Oscillation variability reflected in subtropical Australian precipitation
The La Niña and El Niño phases of the El Niño-Southern Oscillation (ENSO) have major impacts on regional rainfall patterns around the globe, with substantial environmental, societal and economic implications. Long-term perspectives on ENSO behaviour, under changing background conditions, are essenti...
Autores principales: | , , , , , , , , , , , , |
---|---|
Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Nature Publishing Group UK
2019
|
Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6367503/ https://www.ncbi.nlm.nih.gov/pubmed/30733569 http://dx.doi.org/10.1038/s41598-019-38626-3 |
_version_ | 1783393814323396608 |
---|---|
author | Barr, C. Tibby, J. Leng, M. J. Tyler, J. J. Henderson, A. C. G. Overpeck, J. T. Simpson, G. L. Cole, J. E. Phipps, S. J. Marshall, J. C. McGregor, G. B. Hua, Q. McRobie, F. H. |
author_facet | Barr, C. Tibby, J. Leng, M. J. Tyler, J. J. Henderson, A. C. G. Overpeck, J. T. Simpson, G. L. Cole, J. E. Phipps, S. J. Marshall, J. C. McGregor, G. B. Hua, Q. McRobie, F. H. |
author_sort | Barr, C. |
collection | PubMed |
description | The La Niña and El Niño phases of the El Niño-Southern Oscillation (ENSO) have major impacts on regional rainfall patterns around the globe, with substantial environmental, societal and economic implications. Long-term perspectives on ENSO behaviour, under changing background conditions, are essential to anticipating how ENSO phases may respond under future climate scenarios. Here, we derive a 7700-year, quantitative precipitation record using carbon isotope ratios from a single species of leaf preserved in lake sediments from subtropical eastern Australia. We find a generally wet (more La Niña-like) mid-Holocene that shifted towards drier and more variable climates after 3200 cal. yr BP, primarily driven by increasing frequency and strength of the El Niño phase. Climate model simulations implicate a progressive orbitally-driven weakening of the Pacific Walker Circulation as contributing to this change. At centennial scales, high rainfall characterised the Little Ice Age (~1450–1850 CE) in subtropical eastern Australia, contrasting with oceanic proxies that suggest El Niño-like conditions prevail during this period. Our data provide a new western Pacific perspective on Holocene ENSO variability and highlight the need to address ENSO reconstruction with a geographically diverse network of sites to characterise how both ENSO, and its impacts, vary in a changing climate. |
format | Online Article Text |
id | pubmed-6367503 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2019 |
publisher | Nature Publishing Group UK |
record_format | MEDLINE/PubMed |
spelling | pubmed-63675032019-02-11 Holocene El Niño–Southern Oscillation variability reflected in subtropical Australian precipitation Barr, C. Tibby, J. Leng, M. J. Tyler, J. J. Henderson, A. C. G. Overpeck, J. T. Simpson, G. L. Cole, J. E. Phipps, S. J. Marshall, J. C. McGregor, G. B. Hua, Q. McRobie, F. H. Sci Rep Article The La Niña and El Niño phases of the El Niño-Southern Oscillation (ENSO) have major impacts on regional rainfall patterns around the globe, with substantial environmental, societal and economic implications. Long-term perspectives on ENSO behaviour, under changing background conditions, are essential to anticipating how ENSO phases may respond under future climate scenarios. Here, we derive a 7700-year, quantitative precipitation record using carbon isotope ratios from a single species of leaf preserved in lake sediments from subtropical eastern Australia. We find a generally wet (more La Niña-like) mid-Holocene that shifted towards drier and more variable climates after 3200 cal. yr BP, primarily driven by increasing frequency and strength of the El Niño phase. Climate model simulations implicate a progressive orbitally-driven weakening of the Pacific Walker Circulation as contributing to this change. At centennial scales, high rainfall characterised the Little Ice Age (~1450–1850 CE) in subtropical eastern Australia, contrasting with oceanic proxies that suggest El Niño-like conditions prevail during this period. Our data provide a new western Pacific perspective on Holocene ENSO variability and highlight the need to address ENSO reconstruction with a geographically diverse network of sites to characterise how both ENSO, and its impacts, vary in a changing climate. Nature Publishing Group UK 2019-02-07 /pmc/articles/PMC6367503/ /pubmed/30733569 http://dx.doi.org/10.1038/s41598-019-38626-3 Text en © The Author(s) 2019 Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/. |
spellingShingle | Article Barr, C. Tibby, J. Leng, M. J. Tyler, J. J. Henderson, A. C. G. Overpeck, J. T. Simpson, G. L. Cole, J. E. Phipps, S. J. Marshall, J. C. McGregor, G. B. Hua, Q. McRobie, F. H. Holocene El Niño–Southern Oscillation variability reflected in subtropical Australian precipitation |
title | Holocene El Niño–Southern Oscillation variability reflected in subtropical Australian precipitation |
title_full | Holocene El Niño–Southern Oscillation variability reflected in subtropical Australian precipitation |
title_fullStr | Holocene El Niño–Southern Oscillation variability reflected in subtropical Australian precipitation |
title_full_unstemmed | Holocene El Niño–Southern Oscillation variability reflected in subtropical Australian precipitation |
title_short | Holocene El Niño–Southern Oscillation variability reflected in subtropical Australian precipitation |
title_sort | holocene el niño–southern oscillation variability reflected in subtropical australian precipitation |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6367503/ https://www.ncbi.nlm.nih.gov/pubmed/30733569 http://dx.doi.org/10.1038/s41598-019-38626-3 |
work_keys_str_mv | AT barrc holoceneelninosouthernoscillationvariabilityreflectedinsubtropicalaustralianprecipitation AT tibbyj holoceneelninosouthernoscillationvariabilityreflectedinsubtropicalaustralianprecipitation AT lengmj holoceneelninosouthernoscillationvariabilityreflectedinsubtropicalaustralianprecipitation AT tylerjj holoceneelninosouthernoscillationvariabilityreflectedinsubtropicalaustralianprecipitation AT hendersonacg holoceneelninosouthernoscillationvariabilityreflectedinsubtropicalaustralianprecipitation AT overpeckjt holoceneelninosouthernoscillationvariabilityreflectedinsubtropicalaustralianprecipitation AT simpsongl holoceneelninosouthernoscillationvariabilityreflectedinsubtropicalaustralianprecipitation AT coleje holoceneelninosouthernoscillationvariabilityreflectedinsubtropicalaustralianprecipitation AT phippssj holoceneelninosouthernoscillationvariabilityreflectedinsubtropicalaustralianprecipitation AT marshalljc holoceneelninosouthernoscillationvariabilityreflectedinsubtropicalaustralianprecipitation AT mcgregorgb holoceneelninosouthernoscillationvariabilityreflectedinsubtropicalaustralianprecipitation AT huaq holoceneelninosouthernoscillationvariabilityreflectedinsubtropicalaustralianprecipitation AT mcrobiefh holoceneelninosouthernoscillationvariabilityreflectedinsubtropicalaustralianprecipitation |