Thermocline temperature variability in the Timor Strait during the last glacial cycle

摘要: Variations in thermocline temperature within the Timor Strait are related to changes in the intensity of the Indonesian Throughflow (ITF). Thus, reconstructing temperature variations within the thermocline, where the main transport takes place, helps to decipher the ITF role in the past and to better understand the modern current system. We present a study based on Core SO18471 (9 21.987’S, 129 58.983’E, 485 m water depth, 13.5 m length) retrieved in the Timor Sea during the R/V Sonne Cruise 185 “VITAL”. The age model for this core is based on 5 AMS 14C dates and correlation of benthic stable isotopes to the Antarctic EDML1 ice core. We measured Mg/Ca ratios in~ 10 tests of the benthic foraminifera Hoeglundina elegans, Cibicidoides wuellerstorfi and Hyalinea balthica in 1-2 kyr time resolution to reconstruct thermocline temperature variability. Preliminary results show that thermocline temperature varies …