Benthic and planktic foraminiferal Mg/Ca, Ba/Ca and local seawater d18O estimates
During the middle Miocene, Earth's climate changed from a global warm period (Miocene Climatic Optimum) into a colder one with the expansion of the Antarctic ice sheet. This prominent climate transition was also a period of drastic changes in global atmospheric circulation. The development of t...
Main Authors: | , , , , |
---|---|
Format: | Dataset |
Language: | English |
Published: |
PANGAEA
2020
|
Subjects: | |
Online Access: | https://doi.pangaea.de/10.1594/PANGAEA.910403 https://doi.org/10.1594/PANGAEA.910403 |
id |
ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.910403 |
---|---|
record_format |
openpolar |
spelling |
ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.910403 2024-06-23T07:47:55+00:00 Benthic and planktic foraminiferal Mg/Ca, Ba/Ca and local seawater d18O estimates Yang, Xueping Groeneveld, Jeroen Jian, Zhimin Steinke, Stephan Giosan, Liviu LATITUDE: 15.306100 * LONGITUDE: 70.903200 * MINIMUM DEPTH, sediment/rock: 171.61 m * MAXIMUM DEPTH, sediment/rock: 210.39 m 2020 text/tab-separated-values, 1310 data points https://doi.pangaea.de/10.1594/PANGAEA.910403 https://doi.org/10.1594/PANGAEA.910403 en eng PANGAEA https://doi.pangaea.de/10.1594/PANGAEA.910403 https://doi.org/10.1594/PANGAEA.910403 CC-BY-4.0: Creative Commons Attribution 4.0 International Access constraints: unrestricted info:eu-repo/semantics/openAccess Supplement to: Yang, Xueping; Groeneveld, Jeroen; Jian, Zhimin; Steinke, Stephan; Giosan, Liviu (2020): Middle Miocene Intensification of South Asian Monsoonal Rainfall. Paleoceanography and Paleoclimatology, 35(12), e2020PA003853, https://doi.org/10.1029/2020PA003853 adjusted AGE Calculated from Mg/Ca ratios (Anand et al. 2003) CDRILL Core drilling DEPTH sediment/rock Foraminifera benthic benthic δ18O Fragmentation index planktic foraminifera ICP-MS (Thermo X7) Mass spectrometer Finnigan MAT253 connected with Automatic carbonate preparation line Kiel III NGHP-01-01A Sea surface temperature Trilobatus sacculifer Barium/Calcium ratio Manganese/Calcium ratio δ18O seawater reconstructed Dataset 2020 ftpangaea https://doi.org/10.1594/PANGAEA.91040310.1029/2020PA003853 2024-06-12T14:17:12Z During the middle Miocene, Earth's climate changed from a global warm period (Miocene Climatic Optimum) into a colder one with the expansion of the Antarctic ice sheet. This prominent climate transition was also a period of drastic changes in global atmospheric circulation. The development of the South Asian Monsoon (SAM) is not well understood and mainly derived from proxy records of wind strength. Proxy records for middle Miocene changes in rainfall are virtually non-existent for India and the Arabian Sea prior to 11 Ma. This study presents planktic foraminiferal trace element (Mg/Ca and Ba/Ca) and stable oxygen isotope records from NGHP-01 Site 01A off the coast of West India in the Eastern Arabian Sea (EAS) to reconstruct the regional surface hydrography and hydroclimate in the SAM region during the middle Miocene. The Ba/Ca and local seawater d18O (d18Osw) changes reveal a notable gradual increase in SAM rainfall intensity during the middle Miocene. Additionally to this long term increase in precipitation, the seawater δ18O is punctuated by a prominent decrease, i.e. freshening, at ~14 Ma contemporary with Antarctic glaciation. This suggests that Southern Ocean Intermediate Waters (SOIW) transmitted Antarctic salinity changes into the Arabian Sea via an “oceanic tunnel” mechanism. The middle Miocene increase in SAM rainfall is consistent with climate model simulations of an overall strengthening Asian monsoon from the Eocene to the middle/late Miocene with a further acceleration after the Middle Miocene climate transition. Dataset Antarc* Antarctic Ice Sheet Southern Ocean PANGAEA - Data Publisher for Earth & Environmental Science Antarctic Southern Ocean The Antarctic ENVELOPE(70.903200,70.903200,15.306100,15.306100) |
institution |
Open Polar |
collection |
PANGAEA - Data Publisher for Earth & Environmental Science |
op_collection_id |
ftpangaea |
language |
English |
topic |
adjusted AGE Calculated from Mg/Ca ratios (Anand et al. 2003) CDRILL Core drilling DEPTH sediment/rock Foraminifera benthic benthic δ18O Fragmentation index planktic foraminifera ICP-MS (Thermo X7) Mass spectrometer Finnigan MAT253 connected with Automatic carbonate preparation line Kiel III NGHP-01-01A Sea surface temperature Trilobatus sacculifer Barium/Calcium ratio Manganese/Calcium ratio δ18O seawater reconstructed |
spellingShingle |
adjusted AGE Calculated from Mg/Ca ratios (Anand et al. 2003) CDRILL Core drilling DEPTH sediment/rock Foraminifera benthic benthic δ18O Fragmentation index planktic foraminifera ICP-MS (Thermo X7) Mass spectrometer Finnigan MAT253 connected with Automatic carbonate preparation line Kiel III NGHP-01-01A Sea surface temperature Trilobatus sacculifer Barium/Calcium ratio Manganese/Calcium ratio δ18O seawater reconstructed Yang, Xueping Groeneveld, Jeroen Jian, Zhimin Steinke, Stephan Giosan, Liviu Benthic and planktic foraminiferal Mg/Ca, Ba/Ca and local seawater d18O estimates |
topic_facet |
adjusted AGE Calculated from Mg/Ca ratios (Anand et al. 2003) CDRILL Core drilling DEPTH sediment/rock Foraminifera benthic benthic δ18O Fragmentation index planktic foraminifera ICP-MS (Thermo X7) Mass spectrometer Finnigan MAT253 connected with Automatic carbonate preparation line Kiel III NGHP-01-01A Sea surface temperature Trilobatus sacculifer Barium/Calcium ratio Manganese/Calcium ratio δ18O seawater reconstructed |
description |
During the middle Miocene, Earth's climate changed from a global warm period (Miocene Climatic Optimum) into a colder one with the expansion of the Antarctic ice sheet. This prominent climate transition was also a period of drastic changes in global atmospheric circulation. The development of the South Asian Monsoon (SAM) is not well understood and mainly derived from proxy records of wind strength. Proxy records for middle Miocene changes in rainfall are virtually non-existent for India and the Arabian Sea prior to 11 Ma. This study presents planktic foraminiferal trace element (Mg/Ca and Ba/Ca) and stable oxygen isotope records from NGHP-01 Site 01A off the coast of West India in the Eastern Arabian Sea (EAS) to reconstruct the regional surface hydrography and hydroclimate in the SAM region during the middle Miocene. The Ba/Ca and local seawater d18O (d18Osw) changes reveal a notable gradual increase in SAM rainfall intensity during the middle Miocene. Additionally to this long term increase in precipitation, the seawater δ18O is punctuated by a prominent decrease, i.e. freshening, at ~14 Ma contemporary with Antarctic glaciation. This suggests that Southern Ocean Intermediate Waters (SOIW) transmitted Antarctic salinity changes into the Arabian Sea via an “oceanic tunnel” mechanism. The middle Miocene increase in SAM rainfall is consistent with climate model simulations of an overall strengthening Asian monsoon from the Eocene to the middle/late Miocene with a further acceleration after the Middle Miocene climate transition. |
format |
Dataset |
author |
Yang, Xueping Groeneveld, Jeroen Jian, Zhimin Steinke, Stephan Giosan, Liviu |
author_facet |
Yang, Xueping Groeneveld, Jeroen Jian, Zhimin Steinke, Stephan Giosan, Liviu |
author_sort |
Yang, Xueping |
title |
Benthic and planktic foraminiferal Mg/Ca, Ba/Ca and local seawater d18O estimates |
title_short |
Benthic and planktic foraminiferal Mg/Ca, Ba/Ca and local seawater d18O estimates |
title_full |
Benthic and planktic foraminiferal Mg/Ca, Ba/Ca and local seawater d18O estimates |
title_fullStr |
Benthic and planktic foraminiferal Mg/Ca, Ba/Ca and local seawater d18O estimates |
title_full_unstemmed |
Benthic and planktic foraminiferal Mg/Ca, Ba/Ca and local seawater d18O estimates |
title_sort |
benthic and planktic foraminiferal mg/ca, ba/ca and local seawater d18o estimates |
publisher |
PANGAEA |
publishDate |
2020 |
url |
https://doi.pangaea.de/10.1594/PANGAEA.910403 https://doi.org/10.1594/PANGAEA.910403 |
op_coverage |
LATITUDE: 15.306100 * LONGITUDE: 70.903200 * MINIMUM DEPTH, sediment/rock: 171.61 m * MAXIMUM DEPTH, sediment/rock: 210.39 m |
long_lat |
ENVELOPE(70.903200,70.903200,15.306100,15.306100) |
geographic |
Antarctic Southern Ocean The Antarctic |
geographic_facet |
Antarctic Southern Ocean The Antarctic |
genre |
Antarc* Antarctic Ice Sheet Southern Ocean |
genre_facet |
Antarc* Antarctic Ice Sheet Southern Ocean |
op_source |
Supplement to: Yang, Xueping; Groeneveld, Jeroen; Jian, Zhimin; Steinke, Stephan; Giosan, Liviu (2020): Middle Miocene Intensification of South Asian Monsoonal Rainfall. Paleoceanography and Paleoclimatology, 35(12), e2020PA003853, https://doi.org/10.1029/2020PA003853 |
op_relation |
https://doi.pangaea.de/10.1594/PANGAEA.910403 https://doi.org/10.1594/PANGAEA.910403 |
op_rights |
CC-BY-4.0: Creative Commons Attribution 4.0 International Access constraints: unrestricted info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1594/PANGAEA.91040310.1029/2020PA003853 |
_version_ |
1802638176607535104 |