<p>Understanding coastal responses to climate and sea-level changes requires integrated proxy records. This study presents multiproxy evidence from the Baeksu tidal-flat core, providing a reconstruction of Late Quaternary environmental dynamics on the southwestern Korean Peninsula. Pollen, dinoflagellate cyst, and palynofacies analyses document recurring marine influence from MIS 5e to MIS 1. MIS 5e reflects warm and humid interglacial forests, whereas stadial phases such as MIS 5b are characterized by abundant <i>Artemisia</i> and Amaranthaceae, suggesting cooler and drier conditions. MIS 3 is distinguished by the coexistence of subtropical evergreen and cool-temperate taxa, implying a complex climatic regime distinct from that recorded in northern East Asian records. Recurrent Amaranthaceae peaks during MIS 5b, MIS 5a, and MIS 3 suggest episodes of salt-marsh expansion; however, variations in the <i>Artemisia</i>/Amaranthaceae ratio and palynofacies types imply different controlling factors, namely climatic aridity during MIS 5b versus sea-level rise during MIS 5a and MIS 3. The persistent dominance of <i>Spiniferites</i> spp. supports the interpretation of long-term marine influence, while shifts in palynofacies suggest changes in depositional processes associated with varying degrees of marine influence. Together, these integrated proxies highlight the value of coastal archives for resolving climatic and sea-level controls on Late Quaternary environmental change.</p>

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Late Quaternary coastal environmental dynamics and marine–terrestrial interactions from the Baeksu tidal deposits, Southwestern Korea

  • Yongmi Kim,
  • Serin Lim,
  • Tae Soo Chang,
  • Jin Cheul Kim,
  • Sangheon Yi

摘要

Understanding coastal responses to climate and sea-level changes requires integrated proxy records. This study presents multiproxy evidence from the Baeksu tidal-flat core, providing a reconstruction of Late Quaternary environmental dynamics on the southwestern Korean Peninsula. Pollen, dinoflagellate cyst, and palynofacies analyses document recurring marine influence from MIS 5e to MIS 1. MIS 5e reflects warm and humid interglacial forests, whereas stadial phases such as MIS 5b are characterized by abundant Artemisia and Amaranthaceae, suggesting cooler and drier conditions. MIS 3 is distinguished by the coexistence of subtropical evergreen and cool-temperate taxa, implying a complex climatic regime distinct from that recorded in northern East Asian records. Recurrent Amaranthaceae peaks during MIS 5b, MIS 5a, and MIS 3 suggest episodes of salt-marsh expansion; however, variations in the Artemisia/Amaranthaceae ratio and palynofacies types imply different controlling factors, namely climatic aridity during MIS 5b versus sea-level rise during MIS 5a and MIS 3. The persistent dominance of Spiniferites spp. supports the interpretation of long-term marine influence, while shifts in palynofacies suggest changes in depositional processes associated with varying degrees of marine influence. Together, these integrated proxies highlight the value of coastal archives for resolving climatic and sea-level controls on Late Quaternary environmental change.