https://scholars.lib.ntu.edu.tw/handle/123456789/571614
標題: | Hydroclimate variability of central Indo-Pacific region during the Holocene | 作者: | CHUAN-CHOU SHEN LUDVIG LOWEMARK |
關鍵字: | Atmospheric pressure; Atmospheric thermodynamics; Climatology; Incident solar radiation; Drought conditions; Early Holocene; Insolation gradients; Intertropical convergence zone; Positive changes; Southeast Asia; Southern oscillation; Southern Thailand; Caves; El Nino-Southern Oscillation; Holocene; hydrometeorology; insolation; intertropical convergence zone; monsoon; rainfall; Indian Ocean; Malay Peninsula; Pacific Ocean; Thailand | 公開日期: | 2021 | 卷: | 253 | 來源出版物: | Quaternary Science Reviews | 摘要: | Here we present a decadal-resolved hydroclimate record covering the past 11 thousand years based on δ18O data of three stalagmites from Klang Cave (TK) on the Thai-Malay Peninsula, southern Thailand. The δ18O values indicate wetter conditions/more rainfall during the early Holocene from 11 to 7 thousand years before present (kyr BP). A large increase of 2? in δ18O is observed from 7.0 to 6.0 kyr BP, indicating a millennial drying period followed by drought conditions between 6.0 and 5.2 kyr BP. After a long hiatus (5.2–2.7 kyr BP), δ18O data show a millennium-long trend toward dry conditions. An abrupt positive change of 0.8–1.0? in δ18O is noticed between 8.29 and 8.17 kyr BP, reflecting the 8.2-ka event; however, the amplitude of the δ18O shift is much smaller comparing to that of the event of 6.0–5.2 kyr BP. On orbital time-scales, the TK record agrees with insolation-dominated speleothem records in the Asian-Australian monsoon realm. Noticeable inconsistencies among records in the Southeast Asia region (between 8°N and 4°N–8°S) have been documented on multi-centennial scales. Lower δ18O values are likely associated with the mean position of the Intertropical Convergence Zone (ITCZ). A new reconstruction of Holocene ITCZ shifts index within the central Indo-Pacific region, based on stalagmite δ18O records from Klang Cave (8°N) and Liang Luar Cave (8°S), shows that the ITCZ played an important role in hydroclimate variability in the Asian-Australian monsoon regions. The southward shift of the ITCZ in the central Indo-Pacific region, controlled by the interhemispheric extratropical insolation gradient, may strongly correlate with the El Ni?o-Southern Oscillation (ENSO) activities in the Holocene. ? 2020 Elsevier Ltd |
URI: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-85099214634&doi=10.1016%2fj.quascirev.2020.106779&partnerID=40&md5=3d6aee90c1c080810910af84bf1d4389 https://scholars.lib.ntu.edu.tw/handle/123456789/571614 |
ISSN: | 2773791 | DOI: | 10.1016/j.quascirev.2020.106779 |
顯示於: | 地質科學系 |
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