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 * Method/Device: Core drilling (CDRILL)
Parameter(s):
# | Name | Short Name | Unit | Principal Investigator | Method/Device | Comment |
---|---|---|---|---|---|---|
1 | DEPTH, sediment/rock | Depth sed | m | Gebregiorgis, Daniel | Geocode | |
2 | Age model | Age model | ka | Gebregiorgis, Daniel | Age model according to Lisiecki & Raymo (2005) [LR04] | 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) |
3 | Globigerinoides sacculifer, Magnesium/Calcium ratio | G. sacculifer Mg/Ca | mmol/mol | Gebregiorgis, Daniel | Raw Mg/Ca data on G. sacculifer tests | |
4 | Sea surface temperature | SST | °C | Gebregiorgis, Daniel | Reconstructed | see Methods section in Gebregiorgis et al., 2018 |
5 | Globigerinoides sacculifer, δ18O | G. sacculifer δ18O | ‰ PDB | Gebregiorgis, Daniel | Raw O-isotope data on G. sacculifer tests (permille) | |
6 | δ18O, seawater, reconstructed | δ18Osw | ‰ | Gebregiorgis, Daniel | uncorrected for ice volume | |
7 | δ18O, seawater, reconstructed | δ18Osw | ‰ SMOW | Gebregiorgis, Daniel | in VSMOW scale | |
8 | δ18O, reconstructed | δ18O reconst | ‰ | Gebregiorgis, Daniel | Reconstructed 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) | |
9 | δ18O, seawater, reconstructed | δ18Osw | ‰ | Gebregiorgis, Daniel | corrected for ice volume |
License:
Creative Commons Attribution 4.0 International (CC-BY-4.0)
Size:
2096 data points
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