Citation:

PANGAEA.933903

Name: Northern tropical Indian Ocean Mg/Ca derived SST for the last glacial termination, sediment core SSD004_GC03
Published: 2021-07-21
License: https://creativecommons.org/licenses/by/4.0/
Keywords: G. ruber white; Mg/Ca paleothermometry; Tropical Indian Ocean

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Published: 2021-07-21 • DOI registered: 2022-02-08

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Abstract:

Here, we reconstructed sea surface temperature (SST) and upwelling intensity record from the northern tropical Indian Ocean for the last glacial termination (8-24 kyr BP). The marine sedimentary archive was collected during forth voyage of ORV Sindhu Sadhana and SST record was reconstructed using Mg/Ca in G. ruber white (sensu stricto). The upwelling intensity was reconstructed using percentage abundance of G. bulloides. The record demonstrates that the northern tropical Ocean began warming well before the increase in the atmospheric carbo dioxide and has potential implications for the strengthening of the AMOC as well as the eventual glacial termination.

Keyword(s):

G. ruber white; Mg/Ca paleothermometry; Tropical Indian Ocean

Related to:

Singh, Dharmendra Pratap; Saraswat, Rajeev; Mohtadi, Mahyar; Kumar, Pankaj (in review): Warm northern tropical Indian Ocean strengthened the ocean circulation prior to the last glacial termination. Geophysical Research Letters

Coverage:

Latitude: 7.225400 * Longitude: 77.945800

Minimum DEPTH, sediment/rock: 1.435 m * Maximum DEPTH, sediment/rock: 3.965 m

Event(s):

SSD004_GC03 * Latitude: 7.225400 * Longitude: 77.945800 * Method/Device: Gravity corer (GC)

Parameter(s):

#	Name	Short Name	Unit	Principal Investigator	Method/Device	Comment
1	DEPTH, sediment/rock	Depth sed	m	Singh, Dharmendra Pratap		Geocode
2	AGE	Age	ka BP	Singh, Dharmendra Pratap		Geocode
3	Globigerinoides ruber sensu stricto, δ18O	G. ruber ss δ18O	‰ PDB	Singh, Dharmendra Pratap	Mass spectrometer, Thermo Fisher Scientific MAT 253	size fraction 250-350 µm, vs. VPDB
4	Globigerinoides ruber sensu stricto, Magnesium/Calcium ratio	G. ruber ss Mg/Ca	mmol/mol	Singh, Dharmendra Pratap	Agilent Technologies 700 Series Inductively Coupled Plasma-Optical Emission Spectrometer equipped with an autosampler (ASX-520) (MARUM)	size fraction 250-350 µm
5	Sea surface temperature, annual mean	SST (1-12)	°C	Singh, Dharmendra Pratap	Calculated from Mg/Ca ratios (Anand et al., 2003)
6	δ18O, seawater, reconstructed	δ18Osw	‰ SMOW	Singh, Dharmendra Pratap	Ice volume corrected	vs. VSMOW
7	Globigerinoides ruber sensu stricto, Barium/Calcium ratio	G. ruber ss Ba/Ca	µmol/mol	Singh, Dharmendra Pratap	Agilent Technologies 700 Series Inductively Coupled Plasma-Optical Emission Spectrometer equipped with an autosampler (ASX-520) (MARUM)
8	Globigerina bulloides	G. bulloides	%	Singh, Dharmendra Pratap	Counting >150 µm fraction

License:

Creative Commons Attribution 4.0 International (CC-BY-4.0)

Status:

Curation Level: Enhanced curation (CurationLevelC)

Size:

1376 data points

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Datasets with similar metadata

Singh, DP; Saraswat, R; Mohtadi, M et al. (2021): Age determination of sediment core SSD004_GC03. https://doi.org/10.1594/PANGAEA.939909
Mohtadi, M; Oppo, DW; Lückge, A et al. (2011): Radiocarbon dataing, stable oxygen isotopes, and Mg/Ca ratios in surface sediment samples of the tropical eastern Indian Ocean. https://doi.org/10.1594/PANGAEA.770305
Panmei, C; Naidu, PD; Mohtadi, M (2024): Mg/Ca and Mg/Ca-derived SST data of sediment core MD161-17. https://doi.org/10.1594/PANGAEA.967048