Saher, Margot; Jung, S J A; Elderfield, Henry; Greaves, Mervyn; Kroon, Dick (2007): (Table 2) Age determination of sediment core NIOP-C2_929 [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.833133, Supplement to: Saher, M et al. (2007): Sea surface temperatures of the western Arabian Sea during the last deglaciation. Paleoceanography, 22(2), PA2208, https://doi.org/10.1029/2006PA001292
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Published: 2007 (exact date unknown) • DOI registered: 2014-07-01
Abstract:
In this study we present a sea surface temperature (SST) record from the western Arabian Sea for the last 20,000 years. We produced centennial-scale d18O and Mg/Ca SST time series of core NIOP929 with focus on the glacial-interglacial transition. The western Arabian Sea is influenced by the seasonal NE and SW monsoon wind systems. Lowest SSTs occur during the SW monsoon season because of upwelling of cold water, and highest SSTs can be found in the low-productivity intermonsoon season. The Mg/Ca-based temperature record reflects the integrated SST of the SW and NE monsoon seasons. The results show a glacial-interglacial SST difference of ~2°C, which is corroborated by findings from other Arabian Sea cores. At 19 ka B.P. a yet undescribed warm event of several hundred years duration is found, which is also reflected in the d18O record. A second centennial-scale high SST/low d18O event is observed at 17 ka B.P. This event forms the onset of the stepwise yet persistent trend toward Holocene temperatures. Highest Mg/Ca-derived SSTs in the NIOP929 record occurred between 13 and 10 ka B.P. Interglacial SST is ~24°C, indicating influence of upwelling. The onset of Arabian Sea warming occurs when the North Atlantic is experiencing minimum temperatures. The rapid temperature variations at 19, 17, and 13 ka B.P. are difficult to explain with monsoon changes alone and are most likely also linked to regional hydrographic changes, such as trade wind induced variations in warm water advection.
Further details:
Southon, John; Kashgarian, Michaele; Fontugne, Michel R; Metivier, Bernard; Yim, Wyss W-S (2002): Marine reservoir corrections for the Indian Ocean and Southeast Asia. Radiocarbon, 44(1), 167-180, https://doi.org/10.1017/S0033822200064778
Staubwasser, Michael; Sirocko, Frank; Grootes, Pieter Meiert; Erlenkeuser, Helmut (2002): South Asian monsoon climate change and radiocarbon in the Arabian Sea during early and middle Holocene. Paleoceanography, 17(4), 1063, https://doi.org/10.1029/2000PA000608
von Rad, Ulrich; Schulz, Hartmut; Riech, Volkher; den Dulk, Marieke; Berner, Ulrich; Sirocko, Frank (1999): Multiple monsoon-controlled breakdown of oxygen-minimum conditions during the past 30,000 years documented in laminated sediment off Pakistan. Palaeogeography, Palaeoclimatology, Palaeoecology, 152(1-2), 129-161, https://doi.org/10.1016/S0031-0182(99)00042-5
Coverage:
Latitude: 13.703500 * Longitude: 53.246000
Minimum DEPTH, sediment/rock: 0.2175 m * Maximum DEPTH, sediment/rock: 2.1075 m
Event(s):
NIOP-C2_929 (NIOP929) * Latitude: 13.703500 * Longitude: 53.246000 * Elevation: -2490.0 m * Location: Arabian Sea * Campaign: NIOP-C2 * Basis: Tyro * Method/Device: Core (CORE)
Parameter(s):
| # | Name | Short Name | Unit | Principal Investigator | Method/Device | Comment |
|---|---|---|---|---|---|---|
| 1 | DEPTH, sediment/rock | Depth sed | m | Geocode | ||
| 2 | Depth, top/min | Depth top | m | Saher, Margot | ||
| 3 | Depth, bottom/max | Depth bot | m | Saher, Margot | ||
| 4 | Sample amount | N | # | Saher, Margot | ||
| 5 | Age, dated | Age dated | ka | Saher, Margot | Age, 14C AMS | |
| 6 | Age, dated standard deviation | Age dated std dev | ± | Saher, Margot | Age, 14C AMS | |
| 7 | Age, dated material | Dated material | Saher, Margot | |||
| 8 | Size fraction | Size fraction | Saher, Margot | |||
| 9 | Calendar age | Cal age | ka BP | Saher, Margot | Age, 14C calibrated, CALIB (Stuiver & Reimer, 1993) | reservoir age of 600 years (Southon et al., 2002; Staubwasser et al., 2002m von Radf et al., 1999) |
| 10 | Age, comment | Comm | Saher, Margot |
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
74 data points