Australian Summer Monsoon variability in the past 14,000 years revealed by IODP Expedition 356 sediments
The International Ocean Discovery Program (IODP) Expedition 356 Site U1461 cored a Miocene to Holocene sedimentary sequence in the upper bathyal carbonate offshore northwestern Australia (NWA). The siliciclastic component of these strata is primarily derived from the Australian continent. Radiocarbo...
Published in: | Progress in Earth and Planetary Science |
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SPRINGEROPEN
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Online Access: | http://hdl.handle.net/11343/221100 http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000458985800005&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=d4d813f4571fa7d6246bdc0dfeca3a1c https://doi.org/10.1186/s40645-019-0262-5 |
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ftumelbourne:oai:jupiter.its.unimelb.edu.au:11343/221100 2023-05-15T18:00:57+02:00 Australian Summer Monsoon variability in the past 14,000 years revealed by IODP Expedition 356 sediments Ishiwa, T Yokoyama, Y Reuning, L McHugh, CM De Vleeschouwer, D Gallagher, SJ 2019-02-13 http://hdl.handle.net/11343/221100 http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000458985800005&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=d4d813f4571fa7d6246bdc0dfeca3a1c https://doi.org/10.1186/s40645-019-0262-5 English eng SPRINGEROPEN doi:10.1186/s40645-019-0262-5 issn:2197-4284 http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000458985800005&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=d4d813f4571fa7d6246bdc0dfeca3a1c ARTN 17 Ishiwa, T; Yokoyama, Y; Reuning, L; McHugh, CM; De Vleeschouwer, D; Gallagher, SJ, Australian Summer Monsoon variability in the past 14,000 years revealed by IODP Expedition 356 sediments, PROGRESS IN EARTH AND PLANETARY SCIENCE, 2019, 6 2197-4284 http://hdl.handle.net/11343/221100 Journal Article 2019 ftumelbourne https://doi.org/10.1186/s40645-019-0262-5 2019-10-15T12:24:33Z The International Ocean Discovery Program (IODP) Expedition 356 Site U1461 cored a Miocene to Holocene sedimentary sequence in the upper bathyal carbonate offshore northwestern Australia (NWA). The siliciclastic component of these strata is primarily derived from the Australian continent. Radiocarbon dating on macrofossils and planktonic foraminifera shows that the upper 14 m section at Site U1461 preserves Holocene sediments, recording regional climate variability. K/Ca ratios determined by X-ray fluorescence elemental analyses and %K determined by shipboard natural gamma ray analysis are interpreted as indicators of riverine run-off from the Australian continent. We document the consequences of the variability of the Australian Summer Monsoon (ASM) on the continental shelf of NWA. We report an increase in terrigenous input due to a riverine run-off after 11.5 ka, which reaches a maximum at ~ 8.5 ka. This maximum is the result of the enhanced ASM-derived precipitation in response to the southern migration of the Intertropical Convergence Zone (ITCZ). A decrease in riverine run-off due to a weakening of precipitation in the NWA region after 8.5 ka was caused by the northern migration of the ITCZ. We conclude that the ITCZ reached its southernmost position at 8.5 ka and enhanced precipitation in the NWA region. This Holocene record shows that even during interglacial periods, monsoonal variability was primarily controlled by the position of the ITCZ. [Figure not available: see fulltext.]. Article in Journal/Newspaper Planktonic foraminifera The University of Melbourne: Digital Repository Progress in Earth and Planetary Science 6 1 |
institution |
Open Polar |
collection |
The University of Melbourne: Digital Repository |
op_collection_id |
ftumelbourne |
language |
English |
description |
The International Ocean Discovery Program (IODP) Expedition 356 Site U1461 cored a Miocene to Holocene sedimentary sequence in the upper bathyal carbonate offshore northwestern Australia (NWA). The siliciclastic component of these strata is primarily derived from the Australian continent. Radiocarbon dating on macrofossils and planktonic foraminifera shows that the upper 14 m section at Site U1461 preserves Holocene sediments, recording regional climate variability. K/Ca ratios determined by X-ray fluorescence elemental analyses and %K determined by shipboard natural gamma ray analysis are interpreted as indicators of riverine run-off from the Australian continent. We document the consequences of the variability of the Australian Summer Monsoon (ASM) on the continental shelf of NWA. We report an increase in terrigenous input due to a riverine run-off after 11.5 ka, which reaches a maximum at ~ 8.5 ka. This maximum is the result of the enhanced ASM-derived precipitation in response to the southern migration of the Intertropical Convergence Zone (ITCZ). A decrease in riverine run-off due to a weakening of precipitation in the NWA region after 8.5 ka was caused by the northern migration of the ITCZ. We conclude that the ITCZ reached its southernmost position at 8.5 ka and enhanced precipitation in the NWA region. This Holocene record shows that even during interglacial periods, monsoonal variability was primarily controlled by the position of the ITCZ. [Figure not available: see fulltext.]. |
format |
Article in Journal/Newspaper |
author |
Ishiwa, T Yokoyama, Y Reuning, L McHugh, CM De Vleeschouwer, D Gallagher, SJ |
spellingShingle |
Ishiwa, T Yokoyama, Y Reuning, L McHugh, CM De Vleeschouwer, D Gallagher, SJ Australian Summer Monsoon variability in the past 14,000 years revealed by IODP Expedition 356 sediments |
author_facet |
Ishiwa, T Yokoyama, Y Reuning, L McHugh, CM De Vleeschouwer, D Gallagher, SJ |
author_sort |
Ishiwa, T |
title |
Australian Summer Monsoon variability in the past 14,000 years revealed by IODP Expedition 356 sediments |
title_short |
Australian Summer Monsoon variability in the past 14,000 years revealed by IODP Expedition 356 sediments |
title_full |
Australian Summer Monsoon variability in the past 14,000 years revealed by IODP Expedition 356 sediments |
title_fullStr |
Australian Summer Monsoon variability in the past 14,000 years revealed by IODP Expedition 356 sediments |
title_full_unstemmed |
Australian Summer Monsoon variability in the past 14,000 years revealed by IODP Expedition 356 sediments |
title_sort |
australian summer monsoon variability in the past 14,000 years revealed by iodp expedition 356 sediments |
publisher |
SPRINGEROPEN |
publishDate |
2019 |
url |
http://hdl.handle.net/11343/221100 http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000458985800005&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=d4d813f4571fa7d6246bdc0dfeca3a1c https://doi.org/10.1186/s40645-019-0262-5 |
genre |
Planktonic foraminifera |
genre_facet |
Planktonic foraminifera |
op_relation |
doi:10.1186/s40645-019-0262-5 issn:2197-4284 http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000458985800005&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=d4d813f4571fa7d6246bdc0dfeca3a1c ARTN 17 Ishiwa, T; Yokoyama, Y; Reuning, L; McHugh, CM; De Vleeschouwer, D; Gallagher, SJ, Australian Summer Monsoon variability in the past 14,000 years revealed by IODP Expedition 356 sediments, PROGRESS IN EARTH AND PLANETARY SCIENCE, 2019, 6 2197-4284 http://hdl.handle.net/11343/221100 |
op_doi |
https://doi.org/10.1186/s40645-019-0262-5 |
container_title |
Progress in Earth and Planetary Science |
container_volume |
6 |
container_issue |
1 |
_version_ |
1766170252353208320 |