(Table 1) Age determination of ODP Sites 124-769 and 124-768, supplement to: Linsley, Braddock K (1996): Oxygen-isotope record of sea level and climate variations in the Sulu Sea over the past 150,000 years. Nature, 380(6571), 185-270

• Main Author: Linsley, Braddock K
• Format: Dataset
• Language: English
• Published: PANGAEA - Data Publisher for Earth & Environmental Science 1996
• Subjects: Event label; DEPTH, sediment/rock; Age, dated; Age, dated standard deviation; Calendar age; Age, dated material; Age model; Composite Core; Age, 14C AMS; Age, 14C calibrated; Age model, SPECMAP chronology, Imbrie et al. 1984; Leg124; Joides Resolution; Ocean Drilling Program ODP; Dunbar; Huon; Lindley; Pacific; Shackleton; Planktonic foraminifera
• Online Access: https://dx.doi.org/10.1594/pangaea.769856; https://doi.pangaea.de/10.1594/PANGAEA.769856

The Sulu Sea is located in the 'warm pool' of the western Pacific Ocean, where mean annual temperatures are the highest of anywhere on Earth. Because this large heat source supplies the atmosphere with a significant portion of its water vapour and latent heat, understanding the climate history of the region is important for reconstructing global palaeoclimate and for predicting future climate change. Changes in the oxygen isotope composition of planktonic foraminifera from Sulu Sea sediments have previously been shown to reflect changes in the planetary ice volume at glacial–interglacial and millenial timeseales, and such records have been obtained for the late Pleistocene epoch and the last deglaciation (Linsley and Thunell, 1990, doi:10.1029/PA005i006p01025; Lindley and Dunbar, 1994, doi:10.1029/93PA03216; Kudrass et al., 1991, doi:10.1038/349406a0). Here I present results that extend the millenial time resolution record back to 150,000 years before present. On timescales of around 10,000 years, the Sulu Sea oxygen-isotope record matches changes in sea level deduced from coral terraces on the Huon peninsula (Chappell and Shackleton, doi:10.1038/324137a0). This is particularly the case during isotope stage 3 (an interglacial period 23,000 to 58,000 years ago) where the Sulu Sea oxygen-isotope record deviates from the SPECMAP deep-ocean oxygen-isotope record (Imbrie et al., 1984). Thus these results support the idea (Chappell and Shackleton, doi:10.1038/324137a0; Shackleton, 1987, doi:10.1016/0277-3791(87)90003-5) that there were higher sea levels and less continental ice during stage 3 than the SPECMAP record implies and that sea level during this interglacial was just 40–50 metres below present levels. The subsequent rate of increase in continental ice volume during the return to full glacial conditions was correspondingly faster than previously thought. : Calendar year calculated following Stuiver and Braziunas (1993) for raw uncorrected ages <9,000 14C yr, and following Bard et al. (1993) for raw ages >9,000 14C yr. Sedimentation rates for the radiocarbon-dated portion of Site 124-769 record average 11.2 cm/ka, whereas over the entire record sedimentation rates average 7.5 cm/ka.