Hou, Alicia Meng Xiao (2020): Ti/Ca ratios from XRF core scanning of sediment core M125-55-7 [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.914302
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Abstract:
Precipitation extremes with devastating socioeconomic consequences within the South American Monsoon System (SAMS) are expected to become more frequent in the near future. The complexity in SAMS behaviour, however, poses severe challenges for reliable future projections. Thus, robust paleo-monsoon records are needed to constrain the high spatiotemporal variability in the response of SAMS rainfall to different climatic drivers. This study uses Ti/Ca ratios from X-ray fluorescence scanning of a sediment core retrieved off eastern Brazilian to trace precipitation changes over the past 322 kyr. The results indicate that despite the spatiotemporal complexity of the SAMS, insolation-forcing is the primary pacemaker of variations in the monsoonal system. Additional modulation by atmospheric pCO2 suggests that SAMS intensity over eastern Brazil will be suppressed by rising CO2 emissions in the future. Lastly, our record reveals an unprecedented strong and persistent wet period during Marine Isotope Stage 6 driven by anomalously strong trade winds.
Supplement to:
Hou, Alicia Meng Xiao; Bahr, André; Raddatz, Jacek; Voigt, Silke; Greule, Markus; Albuquerque, Ana Luiza Spadano; Chiessi, Cristiano Mazur; Friedrich, Oliver (2020): Insolation and Greenhouse Gas Forcing of the South American Monsoon System Across Three Glacial‐Interglacial Cycles. Geophysical Research Letters, 47(14), https://doi.org/10.1029/2020GL087948
Coverage:
Latitude: -20.363500 * Longitude: -38.623200
Date/Time Start: 2016-03-31T19:46:00 * Date/Time End: 2016-03-31T19:46:00
Minimum DEPTH, sediment/rock: 0.300 m * Maximum DEPTH, sediment/rock: 11.920 m
Event(s):
M125_445-7 (M125-55-7) * Latitude: -20.363500 * Longitude: -38.623200 * Date/Time: 2016-03-31T19:46:00 * Elevation: -1960.1 m * Location: South Atlantic Ocean * Campaign: M125 (SAMBA) * Basis: Meteor (1986) * Method/Device: Piston corer (PC)
Parameter(s):
| # | Name | Short Name | Unit | Principal Investigator | Method/Device | Comment |
|---|---|---|---|---|---|---|
| 1 | DEPTH, sediment/rock | Depth sed | m | Hou, Alicia Meng Xiao | Geocode | |
| 2 | AGE | Age | ka BP | Hou, Alicia Meng Xiao | Geocode | |
| 3 | Calcium, element intensities, normalized | Ca norm | Hou, Alicia Meng Xiao | X-ray fluorescence core scanner (XRF) | ||
| 4 | Titanium, element intensities, normalized | Ti norm | Hou, Alicia Meng Xiao | X-ray fluorescence core scanner (XRF) | ||
| 5 | ln-Titanium/Calcium ratio | ln(Ti/Ca) | Hou, Alicia Meng Xiao | Calculated |
License:
Creative Commons Attribution 4.0 International (CC-BY-4.0)
Size:
6894 data points
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