Holocene environmental changes on the east coast of Korea |
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| Authors: | Jungjae Park Keun Bae Yu Hyoun Soo Lim Young Ho Shin |
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| Institution: | 1. Department of Geography, Seoul National University, Sillim-dong, Gwanak-gu, Seoul, 151-742, Korea
2. Korea Polar Research Institute, 12 Gaetbeol-ro, Yeonsu-gu, Incheon, 406-840, Korea
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| Abstract: | We present a record of Holocene environmental change on the east coast of Korea, inferred using pollen, carbon-isotopic composition (??13C), total organic carbon, total sulfur, carbon/nitrogen ratios, particle size analysis and major element geochemistry in a sediment core from Soonpogae Lagoon. A multi-proxy paleoenvironmental approach had not previously been applied in Korea and allowed us to reconstruct climate and vegetation change, sea-level rise, lagoon development, and human impact on the east coast of Korea over the last 8,000?years. Evidence from Soonpogae Lagoon supports the following three conclusions: (1) As a drying trend prevailed on the east coast of Korea after ~5,900?cal?yr BP, chemical weathering weakened and herbaceous plants became more important than during the previous humid phase (Holocene Climate Optimum), (2) Sea-level rise on the east coast slowed dramatically about 6,800?cal?yr BP, resulting in low rates of sedimentation in Soonpogae Lagoon, and (3) Soonpogae Lagoon was almost completely isolated from the sea by sand barriers when human impact intensified ~2,100 BP. |
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