탄소동위원소분석을 이용한 한국 홀로세의 기후환경변화: 서해 영종도지역을 사례로

Abstract

The landform of the study area is defined as a small-scale alluvial plain in the valley bottom adjacent to the coast. By the aggradation of alluvial materials, this valley bottom plain was formed in dissected parts of low hills. For the purpose of reconstructing the palaeo climate environment in this study, δ C analysis and soil organic carbon analysis are therefore employed. Main results of this study are as follows: Section I: the period of 6,600±60 yr B.P.-5,350±60 yr B.P. was mostly in warm and humid climate environment. A little changes of the humid environment are detected as sub- dry (or sub-humid)→humid in terms of the dryness and wetness. Section II: the period of 5,350±60 yr B.P.-2,200 yr B.P. was in warm and humid climate environment, which is similar to the present. However, The sediments between 4,720± 60 yr B.P. and 4,210±50 yr B.P. experienced the most humid climate environment of all studied sedimentary layers. After 4,210±50 yr B.P., the environment started to change from the humid to the sub-humid (or sub-dry) climate. Section III: the period of 2,200 yr B.P.-210±60 yr B.P. was distinguish from previous two sections as the environmental changes to sub-humid (or sub-dry) climate was apparent.