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 CTD-RMS 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.