Last glacial climate oscillations and sudden environmental changes investigated in stalagmites from southwest Sulawesi, western Pacific
We investigated two stalagmites from the Saripa Cave and Bumi Cave in southern Sulawesi, Indonesia, using high-precision U-series dating and high-resolution trace element and C-O-Sr isotope analysis. The growth record (from 10.4 +/- 0.1 ka to 77.4 +/- 0.9 ka) of the Saripa Cave stalagmite (SR04-ST3)...
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ftmetuankair:oai:https://open.metu.edu.tr:11511/68160 2023-05-15T16:30:14+02:00 Last glacial climate oscillations and sudden environmental changes investigated in stalagmites from southwest Sulawesi, western Pacific Unal Imer, Ezgi Uysal, Ibrahim Tonguc St Pierre, Emma Zhao, Jian-Xin Shulmeister, James 2020-01-01 https://hdl.handle.net/11511/68160 https://doi.org/10.3906/yer-1905-20 unknown TURKISH JOURNAL OF EARTH SCIENCES Unal Imer E., Uysal I. T. , St Pierre E., Zhao J., Shulmeister J., "Last glacial climate oscillations and sudden environmental changes investigated in stalagmites from southwest Sulawesi, western Pacific", TURKISH JOURNAL OF EARTH SCIENCES, cilt.29, ss.221-241, 2020 doi:10.3906/yer-1905-20 241 1300-0985 2 85078448974 221 https://hdl.handle.net/11511/68160 29 WOS:000508872500001 Attribution-NonCommercial-NoDerivatives 4.0 International http://creativecommons.org/licenses/by-nc-nd/4.0/ CC-BY-NC-ND Stalagmite Past climate Trace elements Isotope geochemistry U-series dating 2020 ftmetuankair https://doi.org/10.3906/yer-1905-20 2020-12-11T12:11:00Z We investigated two stalagmites from the Saripa Cave and Bumi Cave in southern Sulawesi, Indonesia, using high-precision U-series dating and high-resolution trace element and C-O-Sr isotope analysis. The growth record (from 10.4 +/- 0.1 ka to 77.4 +/- 0.9 ka) of the Saripa Cave stalagmite (SR04-ST3) is fragmented with two major (at the top: 10.4-11.6 ka and middle: 43.8-44.7 ka sections of the stalagmite) and some short (middle and bottom sections) growth phases, interrupted by long-lasting growth hiatuses. Both the timing of the growth phases and the delta O-18 values for different growth phases are correlated with those of cold/dry (similar to 22 ka and 43.8-44.7 ka) and wet/warm periods (e.g., Greenland Interstadials 12, 14, and 21) in the northern hemisphere speleothem records, displaying both anti-phase and in-phase relationships with the northern hemisphere records. This observation is unique in the Western Pacific tropical region, mostly likely because the Saripa Cave is located within the region of the latitudinally migrating Intertropical Convergence Zone (ITCZ), whereby the rainfall seasons may have changed through time depending on the mean latitude of the ITCZ. The Saripa Cave stalagmite contains textural laminae, which are here interpreted as a record of rapid environmental changes, possibly caused by volcanic eruptions at around 22.55 ka and 44.73 ka BP. The Bumi Cave record (stalagmite BC-09-3-C), on the other hand, presents very little variation in stable isotope and trace element compositions between 26.8 ka and 18.5 ka and does not seem to be influenced by any possible volcanic activity. More detailed future studies investigating millimeter- to submillimeter-scale geochemical time-series constrained by accurate ages in speleothems can be useful in unfolding the effects of eruptions and provide parallel records of climate and sudden environmental changes. Other/Unknown Material Greenland OpenMETU (Middle East Technical University) Greenland Pacific TURKISH JOURNAL OF EARTH SCIENCES 29 2 221 241 |
institution |
Open Polar |
collection |
OpenMETU (Middle East Technical University) |
op_collection_id |
ftmetuankair |
language |
unknown |
topic |
Stalagmite Past climate Trace elements Isotope geochemistry U-series dating |
spellingShingle |
Stalagmite Past climate Trace elements Isotope geochemistry U-series dating Unal Imer, Ezgi Uysal, Ibrahim Tonguc St Pierre, Emma Zhao, Jian-Xin Shulmeister, James Last glacial climate oscillations and sudden environmental changes investigated in stalagmites from southwest Sulawesi, western Pacific |
topic_facet |
Stalagmite Past climate Trace elements Isotope geochemistry U-series dating |
description |
We investigated two stalagmites from the Saripa Cave and Bumi Cave in southern Sulawesi, Indonesia, using high-precision U-series dating and high-resolution trace element and C-O-Sr isotope analysis. The growth record (from 10.4 +/- 0.1 ka to 77.4 +/- 0.9 ka) of the Saripa Cave stalagmite (SR04-ST3) is fragmented with two major (at the top: 10.4-11.6 ka and middle: 43.8-44.7 ka sections of the stalagmite) and some short (middle and bottom sections) growth phases, interrupted by long-lasting growth hiatuses. Both the timing of the growth phases and the delta O-18 values for different growth phases are correlated with those of cold/dry (similar to 22 ka and 43.8-44.7 ka) and wet/warm periods (e.g., Greenland Interstadials 12, 14, and 21) in the northern hemisphere speleothem records, displaying both anti-phase and in-phase relationships with the northern hemisphere records. This observation is unique in the Western Pacific tropical region, mostly likely because the Saripa Cave is located within the region of the latitudinally migrating Intertropical Convergence Zone (ITCZ), whereby the rainfall seasons may have changed through time depending on the mean latitude of the ITCZ. The Saripa Cave stalagmite contains textural laminae, which are here interpreted as a record of rapid environmental changes, possibly caused by volcanic eruptions at around 22.55 ka and 44.73 ka BP. The Bumi Cave record (stalagmite BC-09-3-C), on the other hand, presents very little variation in stable isotope and trace element compositions between 26.8 ka and 18.5 ka and does not seem to be influenced by any possible volcanic activity. More detailed future studies investigating millimeter- to submillimeter-scale geochemical time-series constrained by accurate ages in speleothems can be useful in unfolding the effects of eruptions and provide parallel records of climate and sudden environmental changes. |
author |
Unal Imer, Ezgi Uysal, Ibrahim Tonguc St Pierre, Emma Zhao, Jian-Xin Shulmeister, James |
author_facet |
Unal Imer, Ezgi Uysal, Ibrahim Tonguc St Pierre, Emma Zhao, Jian-Xin Shulmeister, James |
author_sort |
Unal Imer, Ezgi |
title |
Last glacial climate oscillations and sudden environmental changes investigated in stalagmites from southwest Sulawesi, western Pacific |
title_short |
Last glacial climate oscillations and sudden environmental changes investigated in stalagmites from southwest Sulawesi, western Pacific |
title_full |
Last glacial climate oscillations and sudden environmental changes investigated in stalagmites from southwest Sulawesi, western Pacific |
title_fullStr |
Last glacial climate oscillations and sudden environmental changes investigated in stalagmites from southwest Sulawesi, western Pacific |
title_full_unstemmed |
Last glacial climate oscillations and sudden environmental changes investigated in stalagmites from southwest Sulawesi, western Pacific |
title_sort |
last glacial climate oscillations and sudden environmental changes investigated in stalagmites from southwest sulawesi, western pacific |
publisher |
TURKISH JOURNAL OF EARTH SCIENCES |
publishDate |
2020 |
url |
https://hdl.handle.net/11511/68160 https://doi.org/10.3906/yer-1905-20 |
geographic |
Greenland Pacific |
geographic_facet |
Greenland Pacific |
genre |
Greenland |
genre_facet |
Greenland |
op_relation |
Unal Imer E., Uysal I. T. , St Pierre E., Zhao J., Shulmeister J., "Last glacial climate oscillations and sudden environmental changes investigated in stalagmites from southwest Sulawesi, western Pacific", TURKISH JOURNAL OF EARTH SCIENCES, cilt.29, ss.221-241, 2020 doi:10.3906/yer-1905-20 241 1300-0985 2 85078448974 221 https://hdl.handle.net/11511/68160 29 WOS:000508872500001 |
op_rights |
Attribution-NonCommercial-NoDerivatives 4.0 International http://creativecommons.org/licenses/by-nc-nd/4.0/ |
op_rightsnorm |
CC-BY-NC-ND |
op_doi |
https://doi.org/10.3906/yer-1905-20 |
container_title |
TURKISH JOURNAL OF EARTH SCIENCES |
container_volume |
29 |
container_issue |
2 |
container_start_page |
221 |
op_container_end_page |
241 |
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1766019956151943168 |