Th-234, POC, and PON data for estimate of flux of the particulate organic carbon from the surfce layre. The samples of seawater and suspended particle were collected by CTDRMS and in situ pumping system, respectively. Data obtained from MR08-05 were electrically compiled as an excel file, and were depth, potential temperature (Theta), salinity, potential density (Sigma-theta), POC, PON, particulate Th-234 (P-234Th), and dissolved Th-234 (D-234Th). The data of depth, potential temperature, salinity, and potential density were measured by CTD sensors. The error of P-234Th and D-234Th was estimated form counting error.