Abdur Rahman , Wei-Cheng Chang , Kaoru Kashima , Yu Fukumoto , Jyh-Jaan Steven Huang , Ludvig Löwemark , Liang-Chi Wang , Yuan-Pin Chang
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The current records revealed wetter phases during 4.5–3.0 cal kyr BP, 2.0–1.7 cal kyr BP, and 1.0–0.4 cal kyr BP, characterized by the dominance of C3 plants in the DL catchment, increased runoff, and higher lake levels. Drier climates observed in the current study during 3.0–2.0 cal kyr BP and 1.7–1.0 cal kyr BP, marked by a reduction in C3 plants, decreased runoff, and lower lake levels. The northern Taiwan climate during the late Holocene was observed to be regulated by the interplay of EASM and EAWM. The wet climate conditions during 4.5–3.0 were due to the La Niña-like conditions, which led to a strong EASM resulting in high precipitation conditions. The dry climate conditions during 3.0–2.0 cal kyr BP have coincided with El Niño-like conditions during 3.0–2.4 cal kyr BP and a subsequently strong EAWM during 2.4–2.0 cal kyr BP. Both situations led to a reduction in precipitation in the region. Unlike the time frame from 4.5 to 3.0 cal kyr BP, wet climate conditions during 2.0–1.7 and 1.0–0.4 cal kyr BP have coincided with weak EAWM conditions, which led to an increase in precipitation in northern Taiwan. The dry climate noticed between 1.7 and 1.0 cal kyr BP appeared to be the impact of both El Niño-like conditions and strong EAWM.</p></div>","PeriodicalId":49644,"journal":{"name":"Quaternary International","volume":null,"pages":null},"PeriodicalIF":1.9000,"publicationDate":"2024-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Late Holocene paleoclimate reconstruction of northern Taiwan using a multiproxy approach in the Dream Lake sediment core\",\"authors\":\"Abdur Rahman , Wei-Cheng Chang , Kaoru Kashima , Yu Fukumoto , Jyh-Jaan Steven Huang , Ludvig Löwemark , Liang-Chi Wang , Yuan-Pin Chang\",\"doi\":\"10.1016/j.quaint.2024.02.013\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><p>To understand the role of the East Asian summer monsoon (EASM) and the East Asian winter monsoon (EAWM) on the hydroclimate in northern Taiwan, a multiproxy study has been conducted. This study aims to achieve its goal by using micro-XRF data of Ti and sulfur (S), carbon isotopic compositions (δ<sup>13</sup>C) along with elemental concentrations of carbon (C), nitrogen (N) and S, and diatom analyses in the sediment core extracted from the Dream Lake (DL; 25°10′01.9″ N, 121°33′36.0″ E and elevation = 588 m above sea level), northern Taiwan. The radiocarbon dates revealed that the DL core covered the time interval from 4.5 to 0.4 cal kyr BP. The current records revealed wetter phases during 4.5–3.0 cal kyr BP, 2.0–1.7 cal kyr BP, and 1.0–0.4 cal kyr BP, characterized by the dominance of C3 plants in the DL catchment, increased runoff, and higher lake levels. Drier climates observed in the current study during 3.0–2.0 cal kyr BP and 1.7–1.0 cal kyr BP, marked by a reduction in C3 plants, decreased runoff, and lower lake levels. The northern Taiwan climate during the late Holocene was observed to be regulated by the interplay of EASM and EAWM. 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引用次数: 0
摘要
为了了解东亚夏季季候风(EASM)和东亚冬季季候风(EAWM)对台湾北部水文气候的作用,开展了一项多代理研究。本研究利用从台湾北部梦湖(DL;北纬 25°10′01.9″,东经 121°33′36.0″,海拔 588 米)提取的沉积物岩芯中的钛和硫(S)的微 XRF 数据、碳同位素组成(δC)以及碳(C)、氮(N)和 S 的元素浓度和硅藻分析来实现其目标。放射性碳年代测定显示,DL岩芯覆盖了公元前4.5至0.4卡千岁的时间区间。目前的记录显示,在 4.5-3.0 cal kyr BP、2.0-1.7 cal kyr BP 和 1.0-0.4 cal kyr BP 期间气候较湿润,DL 流域以 C3 植物为主,径流增加,湖泊水位升高。本次研究观测到的 3.0-2.0 cal kyr BP 和 1.7-1.0 cal kyr BP 期间气候较干燥,C3 植物减少,径流减少,湖泊水位降低。据观测,全新世晚期的台湾北部气候受 EASM 和 EAWM 的相互影响。4.5-3.0时期的湿润气候条件是由于类似拉尼娜现象的条件导致了强烈的EASM,从而导致了高降水条件。公元前 3.0-2.0 千年期间的干燥气候条件与公元前 3.0-2.4 千年期间的厄尔尼诺样气候条件以及随后公元前 2.4-2.0 千年期间的强 EAWM 相吻合。这两种情况都导致了该地区降水量的减少。与公元前 4.5 至 3.0 千年不同,公元前 2.0 至 1.7 千年和 1.0 至 0.4 千年的湿润气候条件与弱 EAWM 条件同时出现,导致台湾北部降水增加。在 1.7 至 1.0 cal kyr BP 期间的干燥气候似乎是厄尔尼诺现象和强 EAWM 的共同影响。
Late Holocene paleoclimate reconstruction of northern Taiwan using a multiproxy approach in the Dream Lake sediment core
To understand the role of the East Asian summer monsoon (EASM) and the East Asian winter monsoon (EAWM) on the hydroclimate in northern Taiwan, a multiproxy study has been conducted. This study aims to achieve its goal by using micro-XRF data of Ti and sulfur (S), carbon isotopic compositions (δ13C) along with elemental concentrations of carbon (C), nitrogen (N) and S, and diatom analyses in the sediment core extracted from the Dream Lake (DL; 25°10′01.9″ N, 121°33′36.0″ E and elevation = 588 m above sea level), northern Taiwan. The radiocarbon dates revealed that the DL core covered the time interval from 4.5 to 0.4 cal kyr BP. The current records revealed wetter phases during 4.5–3.0 cal kyr BP, 2.0–1.7 cal kyr BP, and 1.0–0.4 cal kyr BP, characterized by the dominance of C3 plants in the DL catchment, increased runoff, and higher lake levels. Drier climates observed in the current study during 3.0–2.0 cal kyr BP and 1.7–1.0 cal kyr BP, marked by a reduction in C3 plants, decreased runoff, and lower lake levels. The northern Taiwan climate during the late Holocene was observed to be regulated by the interplay of EASM and EAWM. The wet climate conditions during 4.5–3.0 were due to the La Niña-like conditions, which led to a strong EASM resulting in high precipitation conditions. The dry climate conditions during 3.0–2.0 cal kyr BP have coincided with El Niño-like conditions during 3.0–2.4 cal kyr BP and a subsequently strong EAWM during 2.4–2.0 cal kyr BP. Both situations led to a reduction in precipitation in the region. Unlike the time frame from 4.5 to 3.0 cal kyr BP, wet climate conditions during 2.0–1.7 and 1.0–0.4 cal kyr BP have coincided with weak EAWM conditions, which led to an increase in precipitation in northern Taiwan. The dry climate noticed between 1.7 and 1.0 cal kyr BP appeared to be the impact of both El Niño-like conditions and strong EAWM.
期刊介绍:
Quaternary International is the official journal of the International Union for Quaternary Research. The objectives are to publish a high quality scientific journal under the auspices of the premier Quaternary association that reflects the interdisciplinary nature of INQUA and records recent advances in Quaternary science that appeal to a wide audience.
This series will encompass all the full spectrum of the physical and natural sciences that are commonly employed in solving Quaternary problems. The policy is to publish peer refereed collected research papers from symposia, workshops and meetings sponsored by INQUA. In addition, other organizations may request publication of their collected works pertaining to the Quaternary.