Incarbona, Alessandro; Sprovieri, Mario (2020): Stable isotopic composition of three foraminifera species in ODP Hole 160-963D [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.922866
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Abstract:
Carbon-rich layers exist at both sides of the Mediterranean Sea sedimentary record and are called sapropels and organic rich layers (ORLs), respectively in the eastern and western basins. They have different levels of organic carbon accumulation and seafloor oxygen deprivation. The most recent sapropel and ORL deposition have a different timing, 10.8-6.1 and 14.5-9.0 ka respectively. Here we investigate oxygen isotopic records of three foraminifera species that occupy different habitats within the Sicily Channel water column since ~ 12.0 ka, thus in the sill between the eastern and western Mediterranean basins. These data are ice volume-corrected, to get information on water masses density variability, and are accompanied by benthic foraminifera 13C measurements to establish Sicily Channel seafloor ventilation. Our results, and the comparison with other chronologically well-constrained Mediterranean records, highlight the connection of the two sub-basins due to monsoon activity. The end of the maximum Nile River flooding at ~ 9.2 ka, and eastern Mediterranean seafloor reventilation above 1800-1500 m depth at ~ 8.2 and 7.2 ka, left a clear signature in the intermediate water isotopic record of the Sicily Channel. Concurrently, the western Mediterranean deep water circulation experienced a significant recovery after a long period of slowdown. We argue that African monsoon weakening was transmitted into the western Mediterranean, through the intermediate layer of circulation, where promoted deep water formation and brought oxygen to the seafloor.
Supplement to:
Incarbona, Alessandro; Sprovieri, Mario (accepted): The Post‐Glacial Isotopic Record of Intermediate Water connects Mediterranean sapropels and Organic‐Rich Layers. Paleoceanography and Paleoclimatology, https://doi.org/10.1029/2020PA004009
Coverage:
Latitude: 37.035800 * Longitude: 13.178100
Date/Time Start: 1995-03-16T17:05:00 * Date/Time End: 1995-03-16T22:00:00
Minimum DEPTH, sediment/rock: 0.01 m * Maximum DEPTH, sediment/rock: 3.55 m
Event(s):
160-963D * Latitude: 37.035800 * Longitude: 13.178100 * Date/Time Start: 1995-03-16T17:05:00 * Date/Time End: 1995-03-16T22:00:00 * Elevation: -469.0 m * Penetration: 8.4 m * Recovery: 8.39 m * Location: Strait of Sicilia * Campaign: Leg160 * Basis: Joides Resolution * Method/Device: Drilling/drill rig (DRILL) * Comment: 1 core; 8.4 m cored; 0 m drilled; 99.9 % recovery
Parameter(s):
| # | Name | Short Name | Unit | Principal Investigator | Method/Device | Comment |
|---|---|---|---|---|---|---|
| 1 | Sample code/label | Sample label | Incarbona, Alessandro | DSDP/ODP/IODP sample designation | ||
| 2 | DEPTH, sediment/rock | Depth sed | m | Incarbona, Alessandro | Geocode | |
| 3 | AGE | Age | ka BP | Incarbona, Alessandro | Geocode | |
| 4 | Globigerinoides ruber, δ13C | G. ruber δ13C | ‰ PDB | Incarbona, Alessandro | ||
| 5 | Globigerinoides ruber, δ18O | G. ruber δ18O | ‰ PDB | Incarbona, Alessandro | ||
| 6 | Neogloboquadrina incompta, δ13C | N. incompta δ13C | ‰ PDB | Incarbona, Alessandro | ||
| 7 | Neogloboquadrina incompta, δ18O | N. incompta δ18O | ‰ PDB | Incarbona, Alessandro | ||
| 8 | Uvigerina spp., δ13C | Uvigerina spp. δ13C | ‰ PDB | Incarbona, Alessandro | ||
| 9 | Uvigerina spp., δ18O | Uvigerina spp. δ18O | ‰ PDB | Incarbona, Alessandro |
License:
Creative Commons Attribution 4.0 International (CC-BY-4.0)
Size:
869 data points