TY  - JOUR
TI  - Last glacial climate oscillations and sudden environmental changes investigated in stalagmites from southwest Sulawesi, western Pacific
AB  - We investigated two stalagmites from the Saripa Cave and Bumi Cave in southern Sulawesi, Indonesia, using high-precisionU-series dating and high-resolution trace element and C-O-Sr isotope analysis. The growth record (from 10.4 ± 0.1 ka to 77.4 ± 0.9 ka)of the Saripa Cave stalagmite (SR04-ST3) is fragmented with two major (at the top: 10.4–11.6 ka and middle: 43.8–44.7 ka sections of thestalagmite) and some short (middle and bottom sections) growth phases, interrupted by long-lasting growth hiatuses. Both the timingof the growth phases and the δ18O values for different growth phases are correlated with those of cold/dry (~22 ka and 43.8–44.7 ka)and wet/warm periods (e.g., Greenland Interstadials 12, 14, and 21) in the northern hemisphere speleothem records, displaying bothanti-phase and in-phase relationships with the northern hemisphere records. This observation is unique in the Western Pacific tropicalregion, mostly likely because the Saripa Cave is located within the region of the latitudinally migrating Intertropical ConvergenceZone (ITCZ), whereby the rainfall seasons may have changed through time depending on the mean latitude of the ITCZ. The SaripaCave stalagmite contains textural laminae, which are here interpreted as a record of rapid environmental changes, possibly caused byvolcanic eruptions at around 22.55 ka and 44.73 ka BP. The Bumi Cave record (stalagmite BC-09-3-C), on the other hand, presentsvery little variation in stable isotope and trace element compositions between 26.8 ka and 18.5 ka and does not seem to be influencedby any possible volcanic activity. More detailed future studies investigating millimeter- to submillimeter-scale geochemical time-seriesconstrained by accurate ages in speleothems can be useful in unfolding the effects of eruptions and provide parallel records of climateand sudden environmental changes.
AU  - SHULMEISTER, James
AU  - ZHAO, Jian-xin
AU  - ÜNAL İMER, Ezgi
AU  - PIERRE, Emma ST
AU  - UYSAL, İbrahim Tonguç
DO  - 10.3906/yer-1905-20
PY  - 2020
JO  - Turkish Journal of Earth Sciences
VL  - 29
IS  - 2
SN  - 1300-0985
SP  - 221
EP  - 241
DB  - TRDizin
UR  - http://search/yayin/detay/335326
ER  -