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Antiphase response of the Indonesian–Australian monsoon to millennial-scale events of the last glacial period
Antiphase behaviour of monsoon systems in alternate hemispheres is well established at yearly and orbital scales in response to alternating sensible heating of continental landmasses. At intermediate timescales without a sensible heating mechanism both in-phase and antiphase behaviours of northern a...
Autores principales: | , , , , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Nature Publishing Group UK
2022
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9691635/ https://www.ncbi.nlm.nih.gov/pubmed/36424387 http://dx.doi.org/10.1038/s41598-022-21843-8 |
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author | Scroxton, Nick Gagan, Michael K. Ayliffe, Linda K. Hantoro, Wahyoe S. Hellstrom, John C. Cheng, Hai Edwards, R. Lawrence Zhao, Jian-xin Suwargadi, Bambang W. Rifai, Hamdi |
author_facet | Scroxton, Nick Gagan, Michael K. Ayliffe, Linda K. Hantoro, Wahyoe S. Hellstrom, John C. Cheng, Hai Edwards, R. Lawrence Zhao, Jian-xin Suwargadi, Bambang W. Rifai, Hamdi |
author_sort | Scroxton, Nick |
collection | PubMed |
description | Antiphase behaviour of monsoon systems in alternate hemispheres is well established at yearly and orbital scales in response to alternating sensible heating of continental landmasses. At intermediate timescales without a sensible heating mechanism both in-phase and antiphase behaviours of northern and southern hemisphere monsoon systems are recorded at different places and timescales. At present, there is no continuous, high resolution, precisely dated record of millennial-scale variability of the Indonesian–Australian monsoon during the last glacial period with which to test theories of paleomonsoon behaviour. Here, we present an extension of the Liang Luar, Flores, speleothem δ(18)O record of past changes in southern hemisphere summer monsoon intensity back to 55.7 kyr BP. Negative δ(18)O excursions (stronger monsoon) occur during Heinrich events whereas positive excursions (weaker monsoon) occur during Dansgaard-Oeschger interstadials—a first order antiphase relationship with northern hemisphere summer monsoon records. An association of negative δ(18)O excursions with speleothem growth phases in Liang Luar suggests that these stronger monsoons are related to higher rainfall amounts. However, the response to millennial-scale variability is inconsistent, including a particularly weak response to Heinrich event 3. We suggest that additional drivers such as underlying orbital-scale variability and drip hydrology influence the δ(18)O response. |
format | Online Article Text |
id | pubmed-9691635 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2022 |
publisher | Nature Publishing Group UK |
record_format | MEDLINE/PubMed |
spelling | pubmed-96916352022-11-26 Antiphase response of the Indonesian–Australian monsoon to millennial-scale events of the last glacial period Scroxton, Nick Gagan, Michael K. Ayliffe, Linda K. Hantoro, Wahyoe S. Hellstrom, John C. Cheng, Hai Edwards, R. Lawrence Zhao, Jian-xin Suwargadi, Bambang W. Rifai, Hamdi Sci Rep Article Antiphase behaviour of monsoon systems in alternate hemispheres is well established at yearly and orbital scales in response to alternating sensible heating of continental landmasses. At intermediate timescales without a sensible heating mechanism both in-phase and antiphase behaviours of northern and southern hemisphere monsoon systems are recorded at different places and timescales. At present, there is no continuous, high resolution, precisely dated record of millennial-scale variability of the Indonesian–Australian monsoon during the last glacial period with which to test theories of paleomonsoon behaviour. Here, we present an extension of the Liang Luar, Flores, speleothem δ(18)O record of past changes in southern hemisphere summer monsoon intensity back to 55.7 kyr BP. Negative δ(18)O excursions (stronger monsoon) occur during Heinrich events whereas positive excursions (weaker monsoon) occur during Dansgaard-Oeschger interstadials—a first order antiphase relationship with northern hemisphere summer monsoon records. An association of negative δ(18)O excursions with speleothem growth phases in Liang Luar suggests that these stronger monsoons are related to higher rainfall amounts. However, the response to millennial-scale variability is inconsistent, including a particularly weak response to Heinrich event 3. We suggest that additional drivers such as underlying orbital-scale variability and drip hydrology influence the δ(18)O response. Nature Publishing Group UK 2022-11-23 /pmc/articles/PMC9691635/ /pubmed/36424387 http://dx.doi.org/10.1038/s41598-022-21843-8 Text en © The Author(s) 2022 https://creativecommons.org/licenses/by/4.0/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 licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence 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 licence, visit http://creativecommons.org/licenses/by/4.0/ (https://creativecommons.org/licenses/by/4.0/) . |
spellingShingle | Article Scroxton, Nick Gagan, Michael K. Ayliffe, Linda K. Hantoro, Wahyoe S. Hellstrom, John C. Cheng, Hai Edwards, R. Lawrence Zhao, Jian-xin Suwargadi, Bambang W. Rifai, Hamdi Antiphase response of the Indonesian–Australian monsoon to millennial-scale events of the last glacial period |
title | Antiphase response of the Indonesian–Australian monsoon to millennial-scale events of the last glacial period |
title_full | Antiphase response of the Indonesian–Australian monsoon to millennial-scale events of the last glacial period |
title_fullStr | Antiphase response of the Indonesian–Australian monsoon to millennial-scale events of the last glacial period |
title_full_unstemmed | Antiphase response of the Indonesian–Australian monsoon to millennial-scale events of the last glacial period |
title_short | Antiphase response of the Indonesian–Australian monsoon to millennial-scale events of the last glacial period |
title_sort | antiphase response of the indonesian–australian monsoon to millennial-scale events of the last glacial period |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9691635/ https://www.ncbi.nlm.nih.gov/pubmed/36424387 http://dx.doi.org/10.1038/s41598-022-21843-8 |
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