Sirocko, Frank; Sarnthein, Michael; Erlenkeuser, Helmut; Lange, Heinz; Arnold, Maurice; Duplessy, Jean-Claude (1993): Age determination of sediment core SO42-74KL from the Arabian Sea (Table 1). PANGAEA, https://doi.org/10.1594/PANGAEA.407912, Supplement to: Sirocko, F et al. (1993): Century-scale events in monsoonal climate over the past 24,000 years. Nature, 364, 322-324, https://doi.org/10.1038/364322a0
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Both the marine sediment record and numerical modelling of the atmospheric summer circulation over the northern Indian Ocean and southeast Asia have shown that the monsoonal climate exhibits a direct but nonlinear response to the intensity of solar insolation during summer, with a time lag of several thousand years. Here we present evidence from a high-resolution record of oxygen isotopes and carbonate spanning the past 24,000 calendar years that the response of the southwest monsoon over the Arabian Sea to long term, gradual insolation changes occurred in several distinct events of less than 300 years duration, at 14,300, 13,500, 13,060, 9,900, 8,800 and 7,300 14C yr BP. Thus, during this transitional period from glacial to post-glacial conditions the slow solar forcing seems to have induced very rapid changes in local climate. We speculate that the rapid response may be related to albedo changes in Asia.
Latitude: 14.321000 * Longitude: 57.347000
Date/Time Start: 1986-05-24T00:00:00 * Date/Time End: 1986-05-24T00:00:00
Minimum DEPTH, sediment/rock: 0.075 m * Maximum DEPTH, sediment/rock: 1.975 m
|#||Name||Short Name||Unit||Principal Investigator||Method/Device||Comment|
|1||DEPTH, sediment/rock||Depth sed||m||Geocode|
|2||Age, dated||Age dated||ka||Sirocko, Frank||Age, 14C AMS||analysed on 10 mg of Globigerina ruber, diameter 315-400 µm|
|3||Age, error||Age e||±||Sirocko, Frank||1-sigma|
|4||Calendar age||Cal age||ka BP||Sirocko, Frank|
|5||Reference/source||Reference||Sirocko, Frank||reference for calibration|
|6||Age, comment||Comm||Sirocko, Frank|
75 data points