Study on the manganese plume in the southern Okinawa Trough

• Main Authors: Liu, Yaw-Jen, 劉曜禎
• Other Authors: Tung-Ming Hsiung
• Format: Others
• Language: zh-TW
• Published: 1997
• Online Access: http://ndltd.ncl.edu.tw/handle/29042970929521316438

碩士 === 國立海洋大學 === 生物技術研究所 === 85 === This study represents the initially manganese geochemistry investigation in the Kuroshio-East China Sea Shelf Exchange Process. The analytical worksinclude the dissolved manganese( DMn), Particulate manganese(PMn) and Particulatealuminum(PAl). The microwave digestion along with atomic absorption analysisappeared that the deviation of the recovery was less than 10%, which based theanalytical result of the NRCC/BCSS-1 marine sediments certified referencematerial. Results of five cruises'investigations of the vertical DMn distribution at astation in the southern Okinawa Trough, it appeared a persistent mid-depth maximum concentration 5-8 nM of DMn with the peak at about 800 m. The mid-depthmaximums also along with a potential density at 27.1-27.2, which implied the intermediate DMn maximum possibly associated with the lateral diffusion andadvection pathway. According to the deference between total manganese(TMn) and chelex-100 extractable manganese(C-100Mn), it represents that the concentration ofC-100Mn is small that the TMn on shelf region, but in the deep sea region theC-100Mn is almost equal to the TMn, especially in the middle layer water.