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Indexes of sediment grain size, sedimentation rates, geochemical composition, heavy minerals, benthic foraminiferal fauna, indicator species of the Kuroshio Cur-rent, paleo-SST and carbonate dissolution of core E017 con-formably suggest a great marine environmental change oc-curring at about 10.1—9.2 cal. kaBP in the southern Oki-nawa Trough, which may correspond to the strengthening of the Kuroshio Warm Current and re-entering the Okinawa Trough through the sea area off northeast Taiwan. The inva-sion of Kuroshio current has experienced a process of grad-ual strengthening and then weakening, and its intensity be-came more fluctuation during the last 5000 years. Compared to the transition of sediment grain size, geochemical compo-sition and heavy minerals, the foraminiferal faunas show a 900-year lag, which may indicate that the invasion of Ku-roshio Current and the consequent sea surface and deep-water environmental changes is a gradual process, and fauna has an obvious lag compared to environment altering. The carbonate dissolution of the Okinawa Trough has had an apparent strengthening since 9.2 cal. kaBP, and reached a maximum in the late 3000 years, which may be caused by the deep-water environmental changes due to the invasion of Kuroshio Current.
Indexes of sediment grain size, sedimentation rates, geochemical composition, heavy minerals, benthic foraminiferal fauna, indicator species of the Kuroshio Cur-rent, paleo-SST and carbonate dissolution of core E017 con-formably suggest a great marine environmental change oc-curring at about 10.1-9.2 cal. kaBP in the southern Oki-nawa Trough, which may correspond to the strengthening of the Kuroshio Warm Current and re-entering the Okinawa Trough through the sea area off northeast Taiwan. The inva- sion of Kuroshio current has experienced a process of grad-ual strengthening and then weakening, and its intensity be-came more fluctuation during the last 5000 years. Compared to the transition of sediment grain size, geochemical compo-sition and heavy minerals, the foraminiferal faunas show a 900-year lag, which may indicate that the invasion of Ku-roshio Current and the consequent sea surface and deep-water environmental changes is a gradual process, and fauna has an obvious lag The carbonate dissolution of the Okinawa Trough has had an apparent strengthening since 9.2 cal. kaBP, and reached a maximum in the late 3000 years, which may be caused by the deep-water environmental changes due to the invasion of Kuroshio Current .