대기 (Atmosphere)
- 제20권3호
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- Pages.261-271
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- 2010
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- 1598-3560(pISSN)
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- 2288-3266(eISSN)
제주도 용천동굴 석순(YC-2)에 기록되어 있는 한반도의 소빙하기
Little Ice Age recorded in the YC-2 stalagmite of the Yongcheon Cave, Jeju Island (South Korea)
- Ji, Hyo Seon (Department of Geology, Kangwon National University) ;
- Woo, Kyung Sik (Department of Geology, Kangwon National University) ;
- Yang, Dong Yoon (Korea Institute of Geoscience and Mineral Resources)
- 투고 : 2010.05.10
- 심사 : 2010.07.30
- 발행 : 2010.09.30
초록
Carbon isotopic compositions of the YC-2 stalagmite in Yongcheon Cave were analyzed to delineate paleoclimatic variations near Korean peninsula for the past historical period. The YC-2 stalagmite is about 68 mm long and annual growth laminae are distinctively identified. Because the number of growth laminae is at least 242, the stalagmite can be estimated to be at least 241 years old. At about 15 mm from the bottom, one thick brown growth lamina is observed, and this lamina was likely to have been formed when the stalagmite ceased to grow, making the hiatus. High resolution, carbon isotope data indicate past fluctuations of East Asia monsoonal intensity (intimately related to the amount of precipitation). Based on the carbon isotope trend, the stalagmite can be divided into three stages (Stages I, II and III). The highest carbon isotopic compositions of Stage I (