Unexpected and persistent decrease in sedimentary 210Pb over the last 60 years and its controlling factors in the Yangtze River Estuary

File contain raw 210Pbxs and 226Ra data in cores C3, C10, C11, C12, C13, D1 and D3 collected during the study described in the manuscript preliminary titled “Unexpected and persistent decrease in sedimentary 210Pb over the last 60 years and its controlling factors in the Yangtze River Estuary”