Oxygen isotope and Mg/Ca record of planktonic foraminifera of sediment core MD01-2390
Changes in the local freshwater budget over the last 22,000 years have been estimated from a sediment core located in the southern South China Sea (SCS) using a combined approach of Mg/Ca and oxygen isotopes on the planktonic foraminifera Globigerinoides ruber (white) sensu stricto (s.s.). Core MD01...
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ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.738282 2023-05-15T18:00:45+02:00 Oxygen isotope and Mg/Ca record of planktonic foraminifera of sediment core MD01-2390 Steinke, Stephan Chiu, Han-Yi Yu, Pai-Sen Shen, Chuan Chou Erlenkeuser, Helmut Löwemark, Ludvig Chen, Min-Te LATITUDE: 6.635300 * LONGITUDE: 113.409000 * DATE/TIME START: 2001-05-18T06:40:00 * DATE/TIME END: 2001-05-18T06:40:00 2006-04-08 application/zip, 2 datasets https://doi.pangaea.de/10.1594/PANGAEA.738282 https://doi.org/10.1594/PANGAEA.738282 en eng PANGAEA https://doi.pangaea.de/10.1594/PANGAEA.738282 https://doi.org/10.1594/PANGAEA.738282 CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess CC-BY Supplement to: Steinke, Stephan; Chiu, Han-Yi; Yu, Pai-Sen; Shen, Chuan Chou; Erlenkeuser, Helmut; Löwemark, Ludvig; Chen, Min-Te (2006): On the influence of sea level and monsoon climate on the southern South China Sea freshwater budget over the last 22,000 years. Quaternary Science Reviews, 25(13-14), 1475-1488, https://doi.org/10.1016/j.quascirev.2005.12.008 Giant piston corer GPC IMAGES IMAGES VII - WEPAMA International Marine Global Change Study Marion Dufresne (1995) MD012390 MD01-2390 MD122 Planktic Foraminifers South China Sea Dataset 2006 ftpangaea https://doi.org/10.1594/PANGAEA.738282 https://doi.org/10.1016/j.quascirev.2005.12.008 2023-01-20T07:31:46Z Changes in the local freshwater budget over the last 22,000 years have been estimated from a sediment core located in the southern South China Sea (SCS) using a combined approach of Mg/Ca and oxygen isotopes on the planktonic foraminifera Globigerinoides ruber (white) sensu stricto (s.s.). Core MD01-2390 (06°28,12N, 113°24,56E; water depth 1591 m) is located near the glacial paleo-river mouths of the Baram, Rajang and North Sunda/Molengraaff Rivers that drained the exposed Sunda Shelf. The delta18Oseawater record reveals lower average values (-0.96±0.18 per mil) during the Last Glacial Maximum (LGM) when compared with modern values (-0.54±0.18 per mil). Low salinity during the LGM is interpreted to reflect a higher freshwater contribution due to a greater proximity of the core site to the mouths of the Baram, Rajang and North Sunda/Molengraaff Rivers at that time. A general deglacial increasing trend in salinity due to the progressive landward displacement of the coastline during deglacial shelf flooding is punctuated by several short-term shifts towards higher and lower salinity that are likely related to abrupt changes in the intensity of the East Asian summer monsoon. Thus, the deglacial delta18Oseawater changes reflect the combined effects of sea-level-induced environmental changes on the shelf (e.g. phases of retreat and breakdown of the shelf drainage systems) and East Asian monsoon climate change. Lower salinity than at present during the Early Holocene may be attributed to an increase in summer monsoonal precipitation that is corroborated by previous marine and terrestrial studies that report a Preboreal-Early Holocene monsoon optimum in the Asian monsoon region. Dataset Planktonic foraminifera PANGAEA - Data Publisher for Earth & Environmental Science Sunda ENVELOPE(-6.982,-6.982,62.205,62.205) ENVELOPE(113.409000,113.409000,6.635300,6.635300) |
institution |
Open Polar |
collection |
PANGAEA - Data Publisher for Earth & Environmental Science |
op_collection_id |
ftpangaea |
language |
English |
topic |
Giant piston corer GPC IMAGES IMAGES VII - WEPAMA International Marine Global Change Study Marion Dufresne (1995) MD012390 MD01-2390 MD122 Planktic Foraminifers South China Sea |
spellingShingle |
Giant piston corer GPC IMAGES IMAGES VII - WEPAMA International Marine Global Change Study Marion Dufresne (1995) MD012390 MD01-2390 MD122 Planktic Foraminifers South China Sea Steinke, Stephan Chiu, Han-Yi Yu, Pai-Sen Shen, Chuan Chou Erlenkeuser, Helmut Löwemark, Ludvig Chen, Min-Te Oxygen isotope and Mg/Ca record of planktonic foraminifera of sediment core MD01-2390 |
topic_facet |
Giant piston corer GPC IMAGES IMAGES VII - WEPAMA International Marine Global Change Study Marion Dufresne (1995) MD012390 MD01-2390 MD122 Planktic Foraminifers South China Sea |
description |
Changes in the local freshwater budget over the last 22,000 years have been estimated from a sediment core located in the southern South China Sea (SCS) using a combined approach of Mg/Ca and oxygen isotopes on the planktonic foraminifera Globigerinoides ruber (white) sensu stricto (s.s.). Core MD01-2390 (06°28,12N, 113°24,56E; water depth 1591 m) is located near the glacial paleo-river mouths of the Baram, Rajang and North Sunda/Molengraaff Rivers that drained the exposed Sunda Shelf. The delta18Oseawater record reveals lower average values (-0.96±0.18 per mil) during the Last Glacial Maximum (LGM) when compared with modern values (-0.54±0.18 per mil). Low salinity during the LGM is interpreted to reflect a higher freshwater contribution due to a greater proximity of the core site to the mouths of the Baram, Rajang and North Sunda/Molengraaff Rivers at that time. A general deglacial increasing trend in salinity due to the progressive landward displacement of the coastline during deglacial shelf flooding is punctuated by several short-term shifts towards higher and lower salinity that are likely related to abrupt changes in the intensity of the East Asian summer monsoon. Thus, the deglacial delta18Oseawater changes reflect the combined effects of sea-level-induced environmental changes on the shelf (e.g. phases of retreat and breakdown of the shelf drainage systems) and East Asian monsoon climate change. Lower salinity than at present during the Early Holocene may be attributed to an increase in summer monsoonal precipitation that is corroborated by previous marine and terrestrial studies that report a Preboreal-Early Holocene monsoon optimum in the Asian monsoon region. |
format |
Dataset |
author |
Steinke, Stephan Chiu, Han-Yi Yu, Pai-Sen Shen, Chuan Chou Erlenkeuser, Helmut Löwemark, Ludvig Chen, Min-Te |
author_facet |
Steinke, Stephan Chiu, Han-Yi Yu, Pai-Sen Shen, Chuan Chou Erlenkeuser, Helmut Löwemark, Ludvig Chen, Min-Te |
author_sort |
Steinke, Stephan |
title |
Oxygen isotope and Mg/Ca record of planktonic foraminifera of sediment core MD01-2390 |
title_short |
Oxygen isotope and Mg/Ca record of planktonic foraminifera of sediment core MD01-2390 |
title_full |
Oxygen isotope and Mg/Ca record of planktonic foraminifera of sediment core MD01-2390 |
title_fullStr |
Oxygen isotope and Mg/Ca record of planktonic foraminifera of sediment core MD01-2390 |
title_full_unstemmed |
Oxygen isotope and Mg/Ca record of planktonic foraminifera of sediment core MD01-2390 |
title_sort |
oxygen isotope and mg/ca record of planktonic foraminifera of sediment core md01-2390 |
publisher |
PANGAEA |
publishDate |
2006 |
url |
https://doi.pangaea.de/10.1594/PANGAEA.738282 https://doi.org/10.1594/PANGAEA.738282 |
op_coverage |
LATITUDE: 6.635300 * LONGITUDE: 113.409000 * DATE/TIME START: 2001-05-18T06:40:00 * DATE/TIME END: 2001-05-18T06:40:00 |
long_lat |
ENVELOPE(-6.982,-6.982,62.205,62.205) ENVELOPE(113.409000,113.409000,6.635300,6.635300) |
geographic |
Sunda |
geographic_facet |
Sunda |
genre |
Planktonic foraminifera |
genre_facet |
Planktonic foraminifera |
op_source |
Supplement to: Steinke, Stephan; Chiu, Han-Yi; Yu, Pai-Sen; Shen, Chuan Chou; Erlenkeuser, Helmut; Löwemark, Ludvig; Chen, Min-Te (2006): On the influence of sea level and monsoon climate on the southern South China Sea freshwater budget over the last 22,000 years. Quaternary Science Reviews, 25(13-14), 1475-1488, https://doi.org/10.1016/j.quascirev.2005.12.008 |
op_relation |
https://doi.pangaea.de/10.1594/PANGAEA.738282 https://doi.org/10.1594/PANGAEA.738282 |
op_rights |
CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1594/PANGAEA.738282 https://doi.org/10.1016/j.quascirev.2005.12.008 |
_version_ |
1766169962286678016 |