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Title: Paleohydrological changes in northeastern Taiwan over the past 2 ky inferred from biological proxies in the sediment record of a floodplain lake
Authors: Yu-Chung Hsieh
Tien-Nan Yang
Teh-Quei Lee
Meng-Yang Lee
Chih-An Huh
Philip A. Meyers
Ludvig Löwemark
Liang-Chi Wang
Wen-Yuan Kao
Kuo-Yen Wei
Rou-Fei Chen
Huei-Fen Chen
Su-Hwa Chen
Jiunn-Tzon Wu
Liang-Jian Shiau
Yue-Gau Chen
Contributors: 國立臺灣海洋大學:應用地球科學研究所
Keywords: Taiwan
Biological proxies
Little Ice Age
Medieval Warm Period
Date: 2014-09
Issue Date: 2017-01-18T01:45:47Z
Publisher: Palaeogeography, Palaeoclimatology, Palaeoecology
Abstract: Abstract: Taiwan is particularly sensitive to changes in monsoonal precipitation and to the frequency of typhoon-induced heavy precipitation events. Many parts of this mountainous subtropical island have high erosion rates that produce high sedimentation rates in lakes and offshore ocean basins, and evidence suggests that these rates have varied in the past. A high-resolution 2 ky record of changes in sediment delivery to Dahu, a floodplain lake in northeastern Taiwan, that suggests changes in precipitation has been inferred from organic matter, pollen, and spores in a 12 m sediment core and from the organic matter compositions of soil, catchment plants, and fluvial suspended sediment. From 0 to 1400 AD, the lake experienced repeated flood events, principally resulting from overflows of the “old” Ilan River, one of tributaries of the Lanyang River, that were briefly interrupted ~ 1000 AD by decreased precipitation and/or only localized rainfall. The record of heavy precipitation can be linked to the northward shift of the ITCZ. During the early Little Ice Age, 1400–1600 AD, local erosion fluctuated in association with deforestation and farming, during which the ITCZ shifting varied as well. A decrease in precipitation since 1600 AD is linked with the southward migration of the ITCZ.
Relation: 410
URI: http://ntour.ntou.edu.tw:8080/ir/handle/987654321/40382
Appears in Collections:[應用地球科學研究所] 期刊論文

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