https://scholars.lib.ntu.edu.tw/handle/123456789/493050
標題: | Temperature and seawater isotopic controls on two stalagmite records since 83 ka from maritime Japan | 作者: | Mori, Taiki Kashiwagi, Kenji Amekawa, Shota Kato, Hirokazu Okumura, Tomoyo Takashima, Chiduru Wu, Chung-Che CHUAN-CHOU SHEN Quade, Jay Kano, Akihiro |
關鍵字: | Central Japan; Dansgaard-Oeschger cycles; Heinrich events; Millennial-scale changes; Seawater oxygen isotopes; Speleothem; Temperature change | 公開日期: | 2018 | 卷: | 192 | 起(迄)頁: | 47-58 | 來源出版物: | Quaternary Science Reviews | 摘要: | Millennial-scale interstadial Dansgaard-Oeschger (D-O) cycles and Heinrich (H) stadial events are pronounced paleoclimatic features during the last glacial period, which were first demonstrated in the North Atlantic region. These stadial and interstadial events are expressed in marine and terrestrial high-resolution records elsewhere in the world, but the magnitude and mode of the regional climate changes are still poorly quantified. Here we present new replicated stalagmite δ18O profiles from two caves in central Japan, which extend back to 83.4 ka. The records clearly display the H7 to H3 events, but not D-O cycles. An important feature of the two Japanese stalagmites is the small difference (∼2.9‰) in δ18O values between the mid-Holocene and the Last Glacial Maximum (LGM). Long-term trends of the stalagmite δ18O values at the more maritime site generally follow that of the δ18O record of seawater, which is responsible for ∼1.1‰ of the ∼2.9‰ difference between mid-Holocene and LGM. The remaining 1.8‰ in the difference can be accounted for by +9 °C of warming between the LGM and mid-Holocene and -3 °C cooling at H events, which are comparable with the previous estimates of land paleo-temperature in the Japanese Islands. The attenuated isotopic signal associated with D-O interstadials indicates that the warming in the Atlantic did not significantly transfer to the maritime Japan. These unique features of the isotopic records of the Japanese stalagmites are due to the geographic position at the vicinity of the moisture source, Kuroshio warm current. © 2018 Elsevier Ltd |
URI: | https://scholars.lib.ntu.edu.tw/handle/123456789/493050 | ISSN: | 0277-3791 | DOI: | 10.1016/j.quascirev.2018.05.024 | SDG/關鍵字: | Glacial geology; Isotopes; Ocean currents; Seawater; Central Japan; Dansgaard-Oeschger cycles; Heinrich Events; Millennial-scale changes; Oxygen isotopes; Speleothem; Temperature changes; Climate change; climate variation; Dansgaard-Oeschger cycle; Heinrich event; interstadial; isotopic analysis; Last Glacial Maximum; long-term change; oxygen isotope; paleoceanography; paleoclimate; paleotemperature; seawater; stalagmite; water temperature; Atlantic Ocean; Atlantic Ocean (North); Japan |
顯示於: | 地質科學系 |
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