Sierro, Francisco Javier; Hodell, David A; Curtis, Jason H; Flores, José-Abel; Reguera, Maria Isabel; Colmenero-Hidalgo, Elena; Bárcena, María Angeles; Grimalt, Joan O; Cacho, Isabel; Frigola, Jaime; Canals, Miquel (2005): (Table 1) Age determination of sediment core MD99-2343 [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.837083, Supplement to: Sierro, FJ et al. (2005): Impact of iceberg melting on Mediterranean thermohaline circulation during Heinrich events. Paleoceanography, 20(2), PA2019, https://doi.org/10.1029/2004PA001051
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Abstract:
Down-core samples of planktonic and benthic foraminifera were analyzed for oxygen and carbon isotopes in International Marine Past Global Changes Study (IMAGES) core MD99-2343 in order to study the interactions between climate change in the Northern Hemisphere and the western Mediterranean thermohaline circulation at times of Heinrich events (HE). Our results confirm the antiphase correlation between enhanced North Atlantic Deep Water formation and low ventilation in the Mediterranean. However, this study reveals that this antiphase relationship in deepwater formation between the North Atlantic and Mediterranean was interrupted during times of HE when the injection of large volumes of water from melting icebergs reached the entrance to the Mediterranean. These events, which lasted less than 1000 years, are represented by pronounced decreases in both planktonic d18O and benthic d13C signals. Lower salinities of Mediterranean surface water resulted in a slowdown of western Mediterranean deepwater overturn even though cold sea surface temperatures and drier climate should have resulted in enhanced deepwater formation.
Coverage:
Latitude: 40.497333 * Longitude: 4.028167
Date/Time Start: 1999-09-17T00:00:00 * Date/Time End: 1999-09-17T00:00:00
Minimum DEPTH, sediment/rock: 0.28 m * Maximum DEPTH, sediment/rock: 15.84 m
Event(s):
MD99-2343 (98) * Latitude: 40.497333 * Longitude: 4.028167 * Date/Time: 1999-09-17T00:00:00 * Elevation: -2391.0 m * Recovery: 32 m * Location: North Minorca * Campaign: MD114 (IMAGES V) * Basis: Marion Dufresne (1995) * Method/Device: Calypso Corer (CALYPSO) * Comment: Calypso/42m/splitted/Mars (Esp)/22 sections
Parameter(s):
| # | Name | Short Name | Unit | Principal Investigator | Method/Device | Comment |
|---|---|---|---|---|---|---|
| 1 | Age, comment | Comm | Sierro, Francisco Javier | |||
| 2 | DEPTH, sediment/rock | Depth sed | m | Geocode | ||
| 3 | Age, dated | Age dated | ka | Sierro, Francisco Javier | Age, 14C AMS | |
| 4 | Age, dated standard deviation | Age dated std dev | ± | Sierro, Francisco Javier | Age, 14C AMS | |
| 5 | Calendar age | Cal age | ka BP | Sierro, Francisco Javier |
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
44 data points