Responses of the upriver valley sediment to Holocene environmental changes in the Paju area of Korea

Nahm, Wook‐Hyun; Kim, Ju–Yong; Lim, Jaesoo; Yu, Kefu

doi:10.1016/j.geomorph.2011.06.023

Cited by 10 publications

(5 citation statements)

References 49 publications

(52 reference statements)

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“…In central Korea, organic (or peat) layers formed intermittently during the Holocene have been reported in various riverside and coastal areas, implying remarkable surficial changes in lowland areas (Hwang et al, 1997;Hwang, 1998;Yang et al, 2008;Yi et al, 2008;Jun et al, 2010;Nahm et al, 2011Nahm et al, , 2013. The presence of these organic layers is indicative of environmental/vegetational changes influenced by climatic and hydrological changes and sea-level transgression/regression.…”

Section: Introductionmentioning

confidence: 98%

“…These monsoons are considered the main factors controlling landscape evolution, including geomorphological and vegetational change in East Asia (An, 2000). To trace the relationship between climate change and environmental change in East Asia, previous studies have used various proxies including pollen (e.g., Xiao et al, 2004;Yi et al, 2008;Jun et al, 2010), oxygen/carbon isotopes of stalagmites from caves (e.g., Dykoski et al, 2005;Wang et al, 2005;Jo et al, 2011Jo et al, , 2014, carbon isotopes of sedimentary organic matter (e.g., Zhong et al, 2010;Lim et al, 2012;Xue et al, 2014), eolian dust (e.g., An et al, 1991a;Porter and An, 1995;Xiao et al, 1995Xiao et al, , 1997An and Porter, 1997;Lim et al, 2005;Porter and Zhou, 2006), and total organic carbon content (TOC%) and grain size in lake/wetland sediments (e.g., Xiao et al, 2006Xiao et al, , 2008Xiao et al, , 2009Yang et al, 2008;Nahm et al, 2011Nahm et al, , 2013. Such studies have suggested that changes in the East Asian monsoon at centennial to millennial timescales during the Holocene were significantly influenced by high-latitude climates and low-latitude ocean-atmosphere teleconnections.…”

Section: Introductionmentioning

confidence: 99%

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Middle Holocene environmental change in central Korea and its linkage to summer and winter monsoon changes

et al. 2015

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To trace the surficial responses of lowlands to past climate change, we investigated δ13C in total organic carbon (TOC), C/N ratios, magnetic susceptibility (MS), and silicon (Si) intensity (directly proportional to concentration) in wetland sediments collected from the Gimpo area of central Korea, covering 6600–4600 cal yr BP. Two organic layers with high TOC%, negatively depleted δ13CTOC values (− 27 to − 29‰), low MS values, and low Si intensities were found at 6200–5900 and 5200–4800 cal yr BP, respectively. These middle Holocene wet periods corresponded to relatively intensified summer monsoon and solar activity periods. The intervening dry period (5900–5200 cal yr BP) with high MS, high Si, and low TOC% corresponded to an intensified dust-activity interval and stronger winter monsoon. This multi-centennial climatic fluctuation of wet periods (6200–5900 cal yr BP and 5200–4800 cal yr BP) and an intervening dry period (5900–5200 cal yr BP) in central Korea was more synchronous with climate change in the arid inner part of China than with that in South China, suggesting possible strong high-latitude-driven climatic influences (e.g., North Atlantic cooling events) during the middle Holocene.

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Section: Introductionmentioning

confidence: 98%

Section: Introductionmentioning

confidence: 99%

Middle Holocene environmental change in central Korea and its linkage to summer and winter monsoon changes

et al. 2015

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“…However, several researchers have pointed out that pollen records show an apparent gradual response or a 1000-year time lag because mature trees are less sensitive to climate change (Williams et al, 2002; Zhao et al, 2009). In comparison, river sediments respond rapidly to intensified rainfall and are extensively altered by precipitation (Dean and Schmidt, 2013; Nahm et al, 2011). Although unconsolidated riverine sediments are vulnerable to erosion, many researchers have already found records of flooding in riverine sediment sections.…”

Section: Discussionmentioning

confidence: 99%

“…Several studies have mentioned the timing of the HCO in Korea: 8000-4000 yr BP in a human society study (Pearson, 1977), 8000-4500 yr BP in a coastal area pollen study (Kong, 1994), 7000-5000 yr BP in a pollen study in a lowland riverine area (Yi et al, 2008), 8000-4500 yr BP in a pollen study in the shelf zone of the East Korean Bay (Evstigneeva and Naryshkina, 2010), 8400-3700 yr BP in a pollen study of swamp deposits (Chung, 2011), 7100-5000 yr BP in a study of upriver valley sediments (Nahm et al, 2011), 8600-5900 yr BP in a stalagmite study (Jo et al, 2011), and 7300-5000 yr BP in a study of coastal wetland deposits (Nahm et al, 2013). The HCO in Korea has generally been described as a warm and humid period, although the timing of the HCO varied in different localities and archives.…”

Section: Introductionmentioning

confidence: 99%

Holocene environmental changes inferred from sedimentary records in the lower reach of the Yeongsan River, Korea

Nahm

Hong

2014

The Holocene

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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.

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“…최후빙기 이후의 식생 및 식물상에 대한 복원은 주로 토양층에 퇴적된 미화석(화분, 포자)이 이용되어 왔으며, 그 외에 기후적인 잔존종과 잔존집단의 현재 분포를 통 해 역사적 분포범위를 추론하고 있다 (Cox and Moore, 1973;Kim et al, 2006;Habel et al, 2010). 한반도의 최후 빙기 이후의 식생대와 식물상의 변화도 다수의 화분층위 학적 연구를 통해 밝혀지고 있다 (Chang and Kim, 1982;Choi, 1998;Song, 2002;Jang et al, 2006;Chung, 2007;Park and Yi, 2008;Yi and Kim, 2009;Jang, 2010;Park and Kim, 2011;Chung and Ryu, 2012;Evstigneeva and Naryshkina, 2012;Kim et al, 2012) (Chang and Kim, 1982;Choi, 1998;Park et al, 2001;Song, 2002;Jang et al, 2006;Kim, 2006;Jang, 2010;Hwang and Yoon, 2011;Nahm and Lim, 2011;Chung and Ryu, 2012) (Davis and Browne, 1996;Park et al, 2001;Strong and Hills, 2003). 세계적으로 이 시 기의 연평균기온은 현재보다 1-4 o C 높았고 (Huntley, 1991;Nesje and Dahl, 1993;Hamilton, 1994;Davis and Browne, 1996;McFadden et al, 2005;Hwang and Yoon, 2011;Mullins et al, 2011;Nahm and Lim, 2011), 해수면도 1-2(-5) m 정도 높았다 (Song, 2002;Kim, 2006;Park et al, 2001;Hwang and Yoon, 2011).…”

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Phytogeographic study on the Holocene hypsithermal relict plant populations in the Korean peninsula

Kim¹,

Chung²,

Kim³

et al. 2014

Korean Journal of Plant Taxonomy

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The Holocene Hypsithermal Interval(or climatic optimum) was the warmest post-glacial period: temperatures rose to as much as 1-4 o C above present temperatures. We hypothesize that southern plants expanded northward and upward during the Hypsithermal Interval. The Hypsithermal relict populations are defined as populations which distribute mainly in Is. Cheju and Southern subregions and have populations of short-distance dispersion separated by more than 100 km from the nearest distribution. The Hypsithermal relict species were identified and their distributions were mapped based on botanical floras and checklist, herbaria specimens, ecological studies, and field surveys of selected species. Evaluation of the hypothesis was based on reviews of published pollen stratigraphic and paleoecological studies. The results showed that the Holocene Hypsithermal relicts such as Corylopsis coreana Uyeki, Carpinus turczaninowii Hance, Stewartia koreana Nakai ex Rehder were expanded northward during the Holocene Hypsithermal Interval.

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Responses of the upriver valley sediment to Holocene environmental changes in the Paju area of Korea

Cited by 10 publications

References 49 publications

Middle Holocene environmental change in central Korea and its linkage to summer and winter monsoon changes

Middle Holocene environmental change in central Korea and its linkage to summer and winter monsoon changes

Holocene environmental changes inferred from sedimentary records in the lower reach of the Yeongsan River, Korea

Phytogeographic study on the Holocene hypsithermal relict plant populations in the Korean peninsula

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