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Nahm, Wook-Hyun,Hong, Sei-Sun E. Arnold Distributed in North America by Cambridg 2014 The Holocene Vol.24 No.12
<P>Multidisciplinary paleoproxy data from three sedimentary cores (9.05-m-long MW-2, 16.50-m-long IL-3, and 11.88-m-long JD-1) recovered from the Yeongsan River Estuary of Korea are presented. A marine influence can be observed at 10,400 yr BP (−21 m) and 8600 yr BP (−14 to −12 m) around the Yeongsan River Estuary. However, if we take the macro-tidal setting of the Yeongsan River Estuary into consideration, actual sea level could differ from the depositional surfaces, and might be higher or lower than the sediment elevation. Precipitation at around 6300–5000 yr BP is estimated to have been higher or stronger than in earlier and later periods. The core sites received increased terrigenous sediment input during this period because of intensified rainfall and consequent river activity. Although sea level was estimated to be high enough to have a strong influence on the study area during the mid-Holocene, the sedimentary features suggest that riverine activity was the dominant factor controlling the sedimentation patterns. This implies that even during the Holocene Climate Optimum in Korea, roughly 7000–5000 yr BP, the wetter condition has occurred within the interval of 6300–5000 yr BP. After the Holocene Climate Optimum, sea level decreased to 0 to −1 m around 5000 yr BP and increased again starting around 4000 yr BP. The time-series results presented in this study are coincident with global trends, and show the potential for developing geomorphological and climate histories for this region.</P>
Late-Holocene palaeoclimatic change at the Dongnimdong archaeological site, Gwangju, SW Korea
Soo Lim, Hyoun,Chung, Chull-Hwan,Kim, Cheong-Bin,Il Lee, Yong,Jong Lee, Heon,Chul Lee, Young E. Arnold Distributed in North America by Cambridg 2007 The Holocene Vol.17 No.5
<P>A late-Holocene swamp sediment record is presented from the Dongnimdong archaeological site in SW Korea. Pollen analysis, geochemical analyses and radiocarbon dating have been used to reconstruct the vegetation and climatic changes. According to the pollen records, temperate deciduous broadleaved trees combined with herbs predominated in the study area ecology. Reduction of deciduous broadleaved trees with the spread of herbaceous taxa found in the middle part (<I>c</I>. 3300U2014;2600 yr BP) indicates climatic change toward cooler and drier conditions. Significant increase in sand content and concomitant decrease in TOC content may suggest the occurrence of a period of drought. Vegetation changes recorded in the pollen sequence indicate the destruction of lowland deciduous forests and an accompanied expansion of grasses resulting from the climate changes. However, the increase of cultivation-accompanied herbs and excavated wooden tools for agriculture suggest the significant anthropogenic influence on the vegetation changes.</P>