Staring Project of Overseas Lacustrine Cores- the Tracks of Paleotyphoon in Northwestern Pacific

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Project title

Code/計畫編號

MOST106-2116-M019-004

Translated Name/計畫中文名

跨國際湖泊岩芯啟動計畫-西北太平洋古颱風遷徙路徑研究

Project Coordinator/計畫主持人

Huei-Fen Chen

Funding Organization/主管機關

National Science and Technology Council

Co-Investigator(s)/共同執行人

汪良奇

Department/Unit

Institute of Earth Sciences

Website

https://www.grb.gov.tw/search/planDetail?id=12240076

Year

2017

Start date/計畫起

01-08-2017

Expected Completion/計畫迄

01-07-2018

Bugetid/研究經費

1310千元

ResearchField/研究領域

地球科學

"全球由於颱風所造成的經濟損失占所有天然災害的一半以上。臨西太平洋的國家而言，經年受颱風影響所擾，輕則破壞農作物生長和影響經濟發展，重則造成道路坍方甚或影響人類生命安全。過去對於颱風和聖嬰現象的研究多著眼近100 年以來的短周期討論，本人過去研究全新世氣候變遷多年，發現在台灣宜蘭的湖泊紀錄顯示一萬年全新世以來，近2000 年颱風次數害頻率明顯增加，並進一步對比中國歷史文獻的紀載，發現中國南方的颱風侵襲頻率確實與台灣湖泊研究結果相近。為深入探討近2000 年來人類最關心的時間段，在西北太平洋古颱風好發的時間和遷徙路徑，本計畫將展開跨國際湖泊岩芯啟動計畫，與大陸和日本學者合作鑽取中國東南沿海省份與日本的湖泊岩芯，未來希望拓展至菲律賓或越南地區。最後將岩芯取得帶回台灣進行定年、粒徑大小、礦物組成、化學成分、磁感率、矽藻與孢粉等參數的分析。藉由沉積物中紀錄的化學、物理與生物等指標的變化，探索全新世颱風降雨強度、頻率與路徑的變化。此外在合作過程若能在尋找代表沙塵暴事件的指標，也能一併討論劇烈氣候改變對於生態的影響。" "Global economic losses due to typhoons account for more than half of all natural disasters worldwide. Countries in the West Pacific Region are particularly susceptible to such losses due to the frequency of typhoons in the region. These losses manifest in terms of crop losses, damaged infrastructure, and threats to human safety. Past studies of typhoons and El Niño-Southern Oscillation (ENSO) have focused primarily on short-cycle phenomena over the past 100 years. However, historical changes in climate and their impact have been the subject of our recent study. Based on sediment cores of lakes in Yilan, Taiwan, these studies revealed an obvious increase in annual typhoon activity over the past ten thousand years since the Holocene. We discovered that the frequency of typhoon increased since 2000 years ago. Furthermore, comparisons with Chinese historical documents in Southern China and Taiwan’s lake record support a synchronous period in typhoon activity. To further investigate likely occurrence times and routes of Northwest Pacific typhoons over the past 2000 years, this project proposes an international lake core start-up program, working in concert with Chinese and Japanese academics to drill lake cores in south-eastern coastal provinces of China and Japan. If smooth going, we hope the program can be expanded to regions such as the Philippines or Vietnam. Finally, the core samples will be sent to Taiwan for dating, particle size, mineral composition, chemical composition, magnetic susceptibility, diatom and pollen analyses. We can estimate the rainfall intensity, frequency and route variations of typhoon by using chemical, physical and biological indicators in sediments. Moreover, if we also can find the aeolian index in this cooperation project, we can discuss how the extremely climate event impact the ecosystem in the future."

Keyword(s)

颱風
西太平洋
湖泊
氣候
指標
typhoon
western Pacific
lake
climate
index

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Staring Project of Overseas Lacustrine Cores- the Tracks of Paleotyphoon in Northwestern Pacific

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