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ZHOU Liang,GAO Shu,YANG Yang,ZHAO Yangyang,HAN Zhuochen,LI Gaocong,JIA Peihong,YIN Yong. 2017. Typhoon events recorded in coastal lagoon deposits, southeastern Hainan Island. Acta Oceanologica Sinica, 36(4):37－45

Typhoon events recorded in coastal lagoon deposits, southeastern Hainan Island

海南岛东南部潟湖台风事件沉积记录

Received:December 19, 2015 Revised:May 05, 2017

DOI：10.1007/s13131-016-0918-6

Key words:paleostorms typhoon-induced deposits grain size loss on ignition Hainan Island

中文关键词: 古风暴台风沉积粒度烧失量海南岛

基金项目:

Author Name	Affiliation	E-mail
ZHOU Liang	Collaborative Innovation Center of South China Sea Studies, Nanjing 210093, China Ministry of Education Key Laboratory for Coast and Island Development, Nanjing University, Nanjing 210093, China
GAO Shu	Collaborative Innovation Center of South China Sea Studies, Nanjing 210093, China Ministry of Education Key Laboratory for Coast and Island Development, Nanjing University, Nanjing 210093, China	shugao@nju.edu.cn
YANG Yang	Collaborative Innovation Center of South China Sea Studies, Nanjing 210093, China Ministry of Education Key Laboratory for Coast and Island Development, Nanjing University, Nanjing 210093, China
ZHAO Yangyang	Collaborative Innovation Center of South China Sea Studies, Nanjing 210093, China Ministry of Education Key Laboratory for Coast and Island Development, Nanjing University, Nanjing 210093, China
HAN Zhuochen	Collaborative Innovation Center of South China Sea Studies, Nanjing 210093, China Ministry of Education Key Laboratory for Coast and Island Development, Nanjing University, Nanjing 210093, China
LI Gaocong	Collaborative Innovation Center of South China Sea Studies, Nanjing 210093, China Ministry of Education Key Laboratory for Coast and Island Development, Nanjing University, Nanjing 210093, China
JIA Peihong	Collaborative Innovation Center of South China Sea Studies, Nanjing 210093, China Ministry of Education Key Laboratory for Coast and Island Development, Nanjing University, Nanjing 210093, China
YIN Yong	Collaborative Innovation Center of South China Sea Studies, Nanjing 210093, China Ministry of Education Key Laboratory for Coast and Island Development, Nanjing University, Nanjing 210093, China

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Abstract:

Coastal lagoon deposits provide evidence for the magnitude and frequency of past tropical cyclones prior to instrumental records and historical documentation. In the present study, we attempt to analyze the sedimentary records containing typhoon information for the northern South China Sea region. For this purpose, sediment cores were collected from two coastal lagoons in the southeastern Hainan Island, and were analyzed in laboratory to derive the data sets about grain size, organic and inorganic carbon contents, and deposition rates. The grain size and organic-inorganic carbon data were used to formulate the proxies of typhoon events. The deposition rates, as calculated using the CRS ²¹⁰Pb method, are around 0.5 mm/a for both lagoons, on the basis of which an age model is established. Within the cores, sedimentary layers associated with 35 typhoon events have been identified. On such a basis, a 350 year history of local typhoon activities is reconstructed by incorporating the 210Pb dating results, typhoon-induced sedimentation patterns and the historical documents. A comparison of the frequency of typhoon occurrence with the regional climate records indicates that the observed changes in tropical cyclone activity patterns, as revealed by the lagoon sedimentary records, may be related to El Niño, Pacific Decadal Oscillation (PDO), North Atlantic Oscillation (NAO), sunspot, and other potential climate drivers that affect the tropical cyclone variability. This study demonstrates that the sedimentary record of storms can be analyzed in combination with historical documents, to provide meaningful information on past storm activities and their long-term variability.

中文摘要:

研究海岸潟湖沉积记录可恢复器测记录之前和史前时期热带气旋活动的频率和强度信息。本文试图通过分析潟湖沉积揭示南海北部地区的古台风活动信息，以海南岛东南部两个潟湖的钻孔沉积物为研究对象，选取沉积物粒度、有机质和碳酸盐含量等参数建立台风事件的鉴别指标，同时借助²¹⁰Pb CRS计年模式确定了沉积物柱状样的沉积速率和年代序列，对海南岛东南部的古风暴活动进行了分析。结果显示，柱状岩心清晰地记录了海南省东南部过去350年期间的35次特大风暴潮事件。基于历史文献和沉积记录的风暴沉积事件恢复了近350年来的风暴活动历史，发现海南省东南部特大风暴事件频数与厄尔尼诺强度有显著关系，同时还可能受到太平洋涛动（PDO）、北大西洋涛动（NAO）和太阳黑子活动等多种气候因素的综合影响。本文研究表明，结合风暴沉积记录和历史文献资料可为恢复海岸带地区长时间尺度高分辨率的古风暴活动规律提供有效信息。

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