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Gebregiorgis, Daniel; Hathorne, Ed C; Giosan, Liviu; Clemens, Steven C; Nürnberg, Dirk; Frank, Martin (2018): Southern Hemisphere forcing of South Asian monsoon precipitation over the past 1 million years. PANGAEA, https://doi.org/10.1594/PANGAEA.894886, Supplement to: Gebregiorgis, D et al. (2018): Southern Hemisphere forcing of South Asian monsoon precipitation over the past ~1 million years. Nature Communications, 9(1), 4702, https://doi.org/10.1038/s41467-018-07076-2

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Abstract:
The orbital-scale timing of South Asian monsoon (SAM) precipitation is poorly understood. Here we combine Mg/Ca measurements (a proxy for the temperature prevailing during calcification) and oxygen isotope (δ18O) analyses of the calcite shells of mixed-layer dwelling planktic foraminifera Globigerinoides sacculifer (present all year round in the Bay of Bengal26) in core NGHP 17 (Ref 27) to generate a unique orbital scale SAM precipitation record for the last ~1 million years.
Coverage:
Latitude: 10.753160 * Longitude: 93.112330
Minimum DEPTH, sediment/rock: 0.08 m * Maximum DEPTH, sediment/rock: 46.56 m
Event(s):
NGHP-01-17 * Latitude: 10.753160 * Longitude: 93.112330 * Elevation: -1356.0 m * Location: Andaman Sea * Campaign: NGHP-01 (India National Gas Hydrate Program Expedition 01) * Basis: Joides Resolution * Device: Core drilling (CDRILL)
Parameter(s):
#NameShort NameUnitPrincipal InvestigatorMethodComment
1DEPTH, sediment/rockDepthmGebregiorgis, DanielGeocode
2Age modelAge modelkaGebregiorgis, DanielAge model, LR04 Lisiecki & Raymo (2005)Age model constructed based on the Lisiecki and Raymo (2005) and NGHP17 benthic records ((see Methods section in Gebregiorgis et al., 2018 and references therein)
3Globigerinoides sacculifer, Magnesium/Calcium ratioG. sacculifer Mg/Cammol/molGebregiorgis, DanielRaw Mg/Ca data on G. sacculifer tests
4Sea surface temperatureSST°CGebregiorgis, DanielReconstructedsee Methods section in Gebregiorgis et al., 2018
5Globigerinoides sacculifer, δ18OG. sacculifer δ18O‰ PDBGebregiorgis, DanielRaw O-isotope data on G. sacculifer tests (permille)
6δ18O, seawater, reconstructedδ18OswGebregiorgis, Danieluncorrected for ice volume
7δ18O, seawater, reconstructedδ18Osw‰ SMOWGebregiorgis, Danielin VSMOW scale
8δ18O, reconstructedδ18O reconGebregiorgis, DanielReconstructed deep-water O-isotope component for the relative sea level (RSL) record for the last 1 Myr after Rohling et al., (2014) (also see Methods section in Gebregiorgis et al., 2018 and references therein)
9δ18O, seawater, reconstructedδ18OswGebregiorgis, Danielcorrected for ice volume
Size:
2096 data points

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