Calcium carbonate, biogenic opal, and organic carbon content and d15N ratios of sediments from the Bering Sea
Millennial-scale paleoceanographic changes in the Bering Sea during the last 71 kyrs were reconstructed using geochemical and isotope proxies (biogenic opal, CaCO3, and total organic carbon (TOC), nitrogen and carbon isotopes of sedimentary organic matters) and microfossil (radiolaria and foraminife...
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ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.770419 2023-05-15T15:43:33+02:00 Calcium carbonate, biogenic opal, and organic carbon content and d15N ratios of sediments from the Bering Sea Kim, Sunghan Khim, Boo-Keun Uchida, Masao Itaki, Takuya Tada, Ryuji MEDIAN LATITUDE: 60.227278 * MEDIAN LONGITUDE: -179.436111 * SOUTH-BOUND LATITUDE: 60.158500 * WEST-BOUND LONGITUDE: -179.463667 * NORTH-BOUND LATITUDE: 60.261667 * EAST-BOUND LONGITUDE: -179.422333 2011-10-12 application/zip, 3 datasets https://doi.pangaea.de/10.1594/PANGAEA.770419 https://doi.org/10.1594/PANGAEA.770419 en eng PANGAEA https://doi.pangaea.de/10.1594/PANGAEA.770419 https://doi.org/10.1594/PANGAEA.770419 CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess CC-BY Supplement to: Kim, Sunghan; Khim, Boo-Keun; Uchida, Masao; Itaki, Takuya; Tada, Ryuji (2011): Millennial-scale paleoceanographic events and implication for the intermediate-water ventilation in the northern slope area of the Bering Sea during the last 71 kyrs. Global and Planetary Change, 79(1-2), 89-98, https://doi.org/10.1016/j.gloplacha.2011.08.004 Bering Sea Mirai MR06-04_PC23A MR06-04_PC24A MR06-04_XCO2s_r01 PC PC23A PC24A Piston corer Dataset 2011 ftpangaea https://doi.org/10.1594/PANGAEA.770419 https://doi.org/10.1016/j.gloplacha.2011.08.004 2023-01-20T07:32:19Z Millennial-scale paleoceanographic changes in the Bering Sea during the last 71 kyrs were reconstructed using geochemical and isotope proxies (biogenic opal, CaCO3, and total organic carbon (TOC), nitrogen and carbon isotopes of sedimentary organic matters) and microfossil (radiolaria and foraminifera) data from two cores (PC23A and PC24A) which were collected from the northern continental slope area at intermediate water depths. Biogenic opal and TOC contents were generally high with high sedimentation rates during the last deglaciation. Laminated sediment depositions during the Early-Holocene (EH) and Bølling-Allerød (BA) were closely related with the increased primary productivity recorded by high biogenic opal and TOC contents and high d15N values. Enhanced surface-water productivity was attributed to increased nutrient supply from strengthened Bering Slope Current (BSC) and from increased amount of glacial melt-water, resulting in high C/N ratios and low d13C values, and high proportion of Rhizoplegma boreale during the last deglaciation. In contrast, low surface-water productivity during the last glacial period was due to depleted nutrient supply caused by strong stratification and to restricted phytoplankton bloom by extensive sea ice distribution under cold climates. Extensive formation of sea ice produces more oxygen-rich intermediate-water, leading to oxic bottom-water conditions due to active ventilation, which favored good preservation of oxic benthic foraminifera species. Remarkable CaCO3 peaks coeval with high biogenic opal and TOC contents in both cores during MIS 3 to MIS 4 are most likely correlated with Dansgaard-Oeschger (D-O) events. High d15N and d13Corg values during D-O interstadials support increased surface-water productivity resulting from nutrients supplied mainly by intensified BSC. During the EH, BA and D-O interstadials, dominant benthic foraminifera species indicate dysoxic bottom-water conditions as a result of increased surface-water productivity and weak ventilation of ... Dataset Bering Sea Sea ice PANGAEA - Data Publisher for Earth & Environmental Science Bering Sea ENVELOPE(-179.463667,-179.422333,60.261667,60.158500) |
institution |
Open Polar |
collection |
PANGAEA - Data Publisher for Earth & Environmental Science |
op_collection_id |
ftpangaea |
language |
English |
topic |
Bering Sea Mirai MR06-04_PC23A MR06-04_PC24A MR06-04_XCO2s_r01 PC PC23A PC24A Piston corer |
spellingShingle |
Bering Sea Mirai MR06-04_PC23A MR06-04_PC24A MR06-04_XCO2s_r01 PC PC23A PC24A Piston corer Kim, Sunghan Khim, Boo-Keun Uchida, Masao Itaki, Takuya Tada, Ryuji Calcium carbonate, biogenic opal, and organic carbon content and d15N ratios of sediments from the Bering Sea |
topic_facet |
Bering Sea Mirai MR06-04_PC23A MR06-04_PC24A MR06-04_XCO2s_r01 PC PC23A PC24A Piston corer |
description |
Millennial-scale paleoceanographic changes in the Bering Sea during the last 71 kyrs were reconstructed using geochemical and isotope proxies (biogenic opal, CaCO3, and total organic carbon (TOC), nitrogen and carbon isotopes of sedimentary organic matters) and microfossil (radiolaria and foraminifera) data from two cores (PC23A and PC24A) which were collected from the northern continental slope area at intermediate water depths. Biogenic opal and TOC contents were generally high with high sedimentation rates during the last deglaciation. Laminated sediment depositions during the Early-Holocene (EH) and Bølling-Allerød (BA) were closely related with the increased primary productivity recorded by high biogenic opal and TOC contents and high d15N values. Enhanced surface-water productivity was attributed to increased nutrient supply from strengthened Bering Slope Current (BSC) and from increased amount of glacial melt-water, resulting in high C/N ratios and low d13C values, and high proportion of Rhizoplegma boreale during the last deglaciation. In contrast, low surface-water productivity during the last glacial period was due to depleted nutrient supply caused by strong stratification and to restricted phytoplankton bloom by extensive sea ice distribution under cold climates. Extensive formation of sea ice produces more oxygen-rich intermediate-water, leading to oxic bottom-water conditions due to active ventilation, which favored good preservation of oxic benthic foraminifera species. Remarkable CaCO3 peaks coeval with high biogenic opal and TOC contents in both cores during MIS 3 to MIS 4 are most likely correlated with Dansgaard-Oeschger (D-O) events. High d15N and d13Corg values during D-O interstadials support increased surface-water productivity resulting from nutrients supplied mainly by intensified BSC. During the EH, BA and D-O interstadials, dominant benthic foraminifera species indicate dysoxic bottom-water conditions as a result of increased surface-water productivity and weak ventilation of ... |
format |
Dataset |
author |
Kim, Sunghan Khim, Boo-Keun Uchida, Masao Itaki, Takuya Tada, Ryuji |
author_facet |
Kim, Sunghan Khim, Boo-Keun Uchida, Masao Itaki, Takuya Tada, Ryuji |
author_sort |
Kim, Sunghan |
title |
Calcium carbonate, biogenic opal, and organic carbon content and d15N ratios of sediments from the Bering Sea |
title_short |
Calcium carbonate, biogenic opal, and organic carbon content and d15N ratios of sediments from the Bering Sea |
title_full |
Calcium carbonate, biogenic opal, and organic carbon content and d15N ratios of sediments from the Bering Sea |
title_fullStr |
Calcium carbonate, biogenic opal, and organic carbon content and d15N ratios of sediments from the Bering Sea |
title_full_unstemmed |
Calcium carbonate, biogenic opal, and organic carbon content and d15N ratios of sediments from the Bering Sea |
title_sort |
calcium carbonate, biogenic opal, and organic carbon content and d15n ratios of sediments from the bering sea |
publisher |
PANGAEA |
publishDate |
2011 |
url |
https://doi.pangaea.de/10.1594/PANGAEA.770419 https://doi.org/10.1594/PANGAEA.770419 |
op_coverage |
MEDIAN LATITUDE: 60.227278 * MEDIAN LONGITUDE: -179.436111 * SOUTH-BOUND LATITUDE: 60.158500 * WEST-BOUND LONGITUDE: -179.463667 * NORTH-BOUND LATITUDE: 60.261667 * EAST-BOUND LONGITUDE: -179.422333 |
long_lat |
ENVELOPE(-179.463667,-179.422333,60.261667,60.158500) |
geographic |
Bering Sea |
geographic_facet |
Bering Sea |
genre |
Bering Sea Sea ice |
genre_facet |
Bering Sea Sea ice |
op_source |
Supplement to: Kim, Sunghan; Khim, Boo-Keun; Uchida, Masao; Itaki, Takuya; Tada, Ryuji (2011): Millennial-scale paleoceanographic events and implication for the intermediate-water ventilation in the northern slope area of the Bering Sea during the last 71 kyrs. Global and Planetary Change, 79(1-2), 89-98, https://doi.org/10.1016/j.gloplacha.2011.08.004 |
op_relation |
https://doi.pangaea.de/10.1594/PANGAEA.770419 https://doi.org/10.1594/PANGAEA.770419 |
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.770419 https://doi.org/10.1016/j.gloplacha.2011.08.004 |
_version_ |
1766377720883707904 |