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您的检索式：作者名="WICHIEN Intasen"
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| 1 | 中晚全新世泰国湾Chanthaburi海岸Welu河口区沉积物的敏感粒级组分及其对季风气候变化的指示意义显示文摘对泰国湾Chanthaburi海岸Welu河口区三根沉积物柱样(WLE08、WLE10和WLE12)进行了210Pb测年分析、AMS14C测年分析和粒度分析。粒度分析结果表明,研究区三根柱样的沉积物类型均属于粘土质粉砂,包含部分贝壳及生物碎屑,分选差,呈正偏态,属于中晚全新世以来形成的沉积物。通过粒级-标准偏差方法对沉积物敏感粒级进行提取,每根柱样各获得两个敏感粒级,分别为S_(A1)和S_(A2)、S_(B1)和S_(B2)以及S_(C1)和S_(C2)。将S_(A2)/S_(A1)、S_(B2)/S_(B1)以及S_(C2)/S_(C1)作为中晚全新世以来亚洲夏季风相对强度变化的替代指标,比值升高可以指示夏季风强度增强,反之则减弱。结合测年结果得出研究区的亚洲夏季风自中晚全新世以来经历了强盛-减弱-增强-减弱-稳定-波动的过程。其中,8.5~6.5 cal.ka BP期间S_(C2)/S_(C1)值较高,表明该时期处于亚洲夏季风强盛期,6.5~3 cal.ka BP期间S_(B2)/S_(B1)值较低且变化较小,表明该时期亚洲夏季风处于较弱的稳定期,而1.5 cal.ka BP以来S_(A2)/S_(A1)值有升高趋势表明亚洲夏季风在这一时期有所增强。此外,在8.2 cal.ka BP期间敏感粒级S_(C2)/S_(C1)值急剧下降,表明夏季风存在一次较大的衰弱期,响应了8.2 cal.ka BP全球范围的气候突变事件,这与阿曼石笋和董歌洞石笋δ^(18)O记录所显示的结果相一致,体现了气候变化具有区域性乃至全球性的联系。 | 王承涛 陈敏 戚洪帅 WICHIEN Intasen APICHAI Kanchanapant 张爱梅 方琦 | 2021 | 地球与环境2021，49，5： | 1 |
| 2 | Clay mineral compositions in the surface sediment of the Chanthaburi coast(northeastern Gulf of Thailand)and their implications on sediment provenance显示文摘Clay mineral composition represents an important tracer of sediment source area,migration processes,and paleoclimatic conditions.Clay mineral analysis was performed on 15 surface sediment samples collected from the coast of Chanthaburi,Thailand.Results show that the composition of clay minerals in the study area differs substantially from that in surrounding regions of the Gulf of Thailand.The clay minerals of the Chanthaburi coast are dominated by kaolinite(~56%),followed by smectite(~21%),illite(~14%),and low concentrations of chlorite(~8%).The average illite chemistry index and crystallinity are 0.93 and 0.32,respectively.Comparative analysis of the clay mineral composition of surface sediments in several typical areas around the Gulf of Thailand indicated that the clays of the Chanthaburi coast are mainly derived from parent rock weathering in the small watersheds of the Chanthaburi and Welu rivers and the surrounding islands.Terrestrial input from the northern coast of the Gulf of Thailand(excluding the Mekong River)was previously considered negligible;however,the present results indicate that such input has impact on the eastern Gulf of Thailand.The warm humid climatic conditions in Southeast Asia are the primary factors that affect the strong chemical weathering in the study area,followed by the nature of the parent rock. | Min CHEN Hongshuai QI Apitida WASUWATCHARAPONG Apichai KANCHANAPANT Wichien INTASEN Guobiao HUANG Xuan LIU | 2023 | Journal of Oceanology and Limnology2023，41，5： | 0 |
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