Paleohydrological changes in northeastern Taiwan over the past 2 ky inferred from biological proxies in the sediment record of a floodplain lake

被引:11
|
作者
Yang, Tien-Nan [1 ,2 ]
Lee, Teh-Quei [1 ]
Lee, Meng-Yang [3 ]
Huh, Chih-An [1 ]
Meyers, Philip A. [4 ]
Loewemark, Ludvig [5 ]
Wang, Liang-Chi [5 ]
Kao, Wen-Yuan [6 ]
Wei, Kuo-Yen [5 ]
Chen, Rou-Fei [1 ,7 ]
Chen, Huei-Fen [8 ]
Chen, Su-Hwa [6 ]
Wu, Jiunn-Tzong [9 ]
Shiau, Liang-Jian [1 ]
Chen, Yue-Gau [5 ]
Hsieh, Yu-Chung [10 ]
机构
[1] Acad Sinica, Inst Earth Sci, Taipei 115, Taiwan
[2] CPC Corp, Explorat & Dev Res Inst, Miaoli 360, Taiwan
[3] Univ Taipei, Dept Earth & Life Sci, Taipei 100, Taiwan
[4] Univ Michigan, Dept Earth & Environm Sci, Ann Arbor, MI 48109 USA
[5] Natl Taiwan Univ, Dept Geosci, Taipei 106, Taiwan
[6] Natl Taiwan Univ, Dept Life Sci, Taipei 106, Taiwan
[7] Chinese Culture Univ, Dept Geol, Taipei 111, Taiwan
[8] Natl Taiwan Ocean Univ, Inst Appl Geosci, Keelung 202, Taiwan
[9] Acad Sinica, Biodivets Res Ctr, Taipei 115, Taiwan
[10] MOEA, Cent Geol Survey, Taipei, Taiwan
基金
瑞典研究理事会;
关键词
Biological proxies; Hydrology; Dahu; Little Ice Age; Medieval Warm Period; Taiwan; ORGANIC GEOCHEMICAL PROXIES; SOUTHERN OKINAWA TROUGH; VARIABILITY; RAINFALL; HISTORY; MONSOON; DELTA-C-13; CLIMATE; RECONSTRUCTION; VEGETATION;
D O I
10.1016/j.palaeo.2014.06.018
中图分类号
P9 [自然地理学];
学科分类号
0705 ; 070501 ;
摘要
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 similar to 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. (C) 2014 Elsevier B.V. All rights reserved.
引用
收藏
页码:401 / 411
页数:11
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