A 12,000-yr pollen record off Cape Hatteras — Pollen sources and mechanisms of pollen dispersion

摘要: Abstract Integrating both marine and terrestrial signals from the same sediment core is one of primary challenges for understanding role ocean–atmosphere coupling throughout past climate changes. It therefore vital to understand how pollen signal a given record reflects vegetation changes neighboring continent. The comparison between JPC32 (KNR178JPC32) available sequences eastern North America over last 12,170 years indicates that signature off Cape Hatteras gives an integrated image regional encompassing Pee Dee river, Chesapeake Delaware hydrographic basins reliable in reconstructing adjacent Extremely high quantities grains included sediments were transferred continent sea, at intervals 10,100–8800 cal yr BP, 8300–7500 cal yr 5800–4300 cal yr BP 2100–730 cal yr during storm events favored by episodes rapid sea-level rise coast US. In contrast, export was reduced 12,170–10,150 cal yr 4200–2200 cal yr intense continental dryness slow sea level or lowstands near absence reworked contrasts with quantity material nearby but deeper located sites, suggesting not affected Deep Western Boundary Current (DWBC) since end Younger Dryas should be considered key site studying western Atlantic.