Mass spectrometry imaging-derived GDGT-based CCaT index from sediment core SO130_289KL (northeastern Arabian Sea) as a proxy for water column oxygenation and monsoon-driven variability during the last deglaciation
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| Auteurs principaux: | , , , , , , , , , , , , |
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| Format: | Dataset Open Access |
| Langue: | en |
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PANGAEA
2026
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| _version_ | 1867168243624443904 |
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| author | Obreht, Igor Lückge, Andreas Mohtadi, Mahyar Zahajská, Petra Schefuß, Enno Scholz, Denis Wörmer, Lars Hällberg, Petter Budsky, Alexander Adolphi, Florian Haug, Gerald H Grosjean, Martin Hinrichs, Kai-Uwe |
| author_facet | Obreht, Igor Lückge, Andreas Mohtadi, Mahyar Zahajská, Petra Schefuß, Enno Scholz, Denis Wörmer, Lars Hällberg, Petter Budsky, Alexander Adolphi, Florian Haug, Gerald H Grosjean, Martin Hinrichs, Kai-Uwe |
| collection | Datos científicos de ciencias marinas y ambientales |
| contents | This dataset presents GDGT-based proxy data derived from sediment core SO130_289KL (23°07.34′N, 66°29.84′E; 571 m water depth) in the northeastern Arabian Sea, covering the last deglaciation with emphasis on GI-1. Analyses were conducted using mass spectrometry imaging (MSI) on sediment slices at 200 µm resolution. The crenarchaeol–caldarchaeol tetraether index (CCaT) was calculated from GDGT-0 and GDGT-5 compounds detected via MALDI-FT-ICR-MS. Although CCaT can be converted to SST using published calibrations, in this setting the proxy primarily reflects water column oxygenation and oxygen minimum zone (OMZ) intensity rather than temperature. Variability in CCaT is interpreted to be driven by South Asian summer monsoon (SASM) wind strength and associated upwelling and circulation changes. Depth is presented as centimeters below seafloor (cmbsf) and age as before the year 2000 CE (b2k). |
| format | Dataset Open Access |
| id | pangaea_https___doi_org_10_1594_PANGAEA_993861 |
| institution | PANGAEA |
| language | en |
| publishDate | 2026 |
| publisher | PANGAEA |
| record_format | pangaea |
| spellingShingle | Mass spectrometry imaging-derived GDGT-based CCaT index from sediment core SO130_289KL (northeastern Arabian Sea) as a proxy for water column oxygenation and monsoon-driven variability during the last deglaciation Obreht, Igor Lückge, Andreas Mohtadi, Mahyar Zahajská, Petra Schefuß, Enno Scholz, Denis Wörmer, Lars Hällberg, Petter Budsky, Alexander Adolphi, Florian Haug, Gerald H Grosjean, Martin Hinrichs, Kai-Uwe Age; Arabian Sea; Calculated; CCaT; Crenarchaeol-caldarchaeol tetraether index; Crenarchaeol-caldarchaeol tetraether index, uncertainty; Deglaciation; DEPTH, sediment/rock; GDGT; KAL; Kasten corer; MAKRAN 2; Mass spectrometry imaging; monsoon intensity; Oxygen minimum zone; paleoclimate proxy; SASM; SO130; SO130_289KL; SO130-289KL; Sonne This dataset presents GDGT-based proxy data derived from sediment core SO130_289KL (23°07.34′N, 66°29.84′E; 571 m water depth) in the northeastern Arabian Sea, covering the last deglaciation with emphasis on GI-1. Analyses were conducted using mass spectrometry imaging (MSI) on sediment slices at 200 µm resolution. The crenarchaeol–caldarchaeol tetraether index (CCaT) was calculated from GDGT-0 and GDGT-5 compounds detected via MALDI-FT-ICR-MS. Although CCaT can be converted to SST using published calibrations, in this setting the proxy primarily reflects water column oxygenation and oxygen minimum zone (OMZ) intensity rather than temperature. Variability in CCaT is interpreted to be driven by South Asian summer monsoon (SASM) wind strength and associated upwelling and circulation changes. Depth is presented as centimeters below seafloor (cmbsf) and age as before the year 2000 CE (b2k). |
| title | Mass spectrometry imaging-derived GDGT-based CCaT index from sediment core SO130_289KL (northeastern Arabian Sea) as a proxy for water column oxygenation and monsoon-driven variability during the last deglaciation |
| topic | Age; Arabian Sea; Calculated; CCaT; Crenarchaeol-caldarchaeol tetraether index; Crenarchaeol-caldarchaeol tetraether index, uncertainty; Deglaciation; DEPTH, sediment/rock; GDGT; KAL; Kasten corer; MAKRAN 2; Mass spectrometry imaging; monsoon intensity; Oxygen minimum zone; paleoclimate proxy; SASM; SO130; SO130_289KL; SO130-289KL; Sonne |
| url | https://doi.org/10.1594/PANGAEA.993861 |