1. Lower export production during glacial periods in the equatorial Pacific derived from (231Pa/230Th)xs,0 measurements in deep-sea sediments Pichat, Sylvain; Sims, Kenneth W. W.; François, Roger; McManus, Jerry F.; Leger, Susan Brown; Albarède, Francis 2004 Articles Marine sediments--AnalysisChemical oceanographySubmarine geologyHydrologyPaleoclimatology