Changes in ocean properties and particulate organic carbon flux after typhoon Fanapi in the Northwestern Pacific Ocean

• Main Authors: I-Hsiang Chen, 陳翼翔
• Other Authors: Chin-Chang Hung
• Format: Others
• Language: zh-TW
• Published: 2011
• Online Access: http://ndltd.ncl.edu.tw/handle/84354199992262300489

碩士 === 國立臺灣海洋大學 === 海洋環境化學與生態研究所 === 99 === To understand the variations of hydrography and particulate organic carbon (POC) flux after passage of typhoon Fanapi in the Northwestern Pacific (NWP), this study conducted field experiments during 9/22 ~ 10/7, 2010. The in situ surface chlorophyll concentration (0.09 mg m-3) after 7 ~ 16 days passage of the typhoon in the NWP was slightly higher than before typhoon passage (0.07 mg m-3). At the same time, the MODIS Terra model estimated surface chlorophyll concentrations was 0.2 ~ 0.3 mg m-3, which was 2 ~ 3-fold that measured in situ chlorophyll concentrations. The results suggest that satellite observation might be overestimated. The POC flux 7 ~ 11 days after passage of the typhoon was 9.1 ~ 20.3 mg C m−2 d−1 (average 13.0 ± 3.4), which was 1.5-fold that (5.2 ~ 13.1 mg C m−2 d−1, average 8.9 ± 3.9) recorded during a period (July ~ August, 2010) in similar latitude region when no typhoons occurred. The chlorophyll concentrations measured by satellite observations after passage of the typhoon may be overestimated. However, enhanced chlorophyll concentrations within the euphotic zone indeed increase POC flux suggesting that a typhoon causes efficient POC export out of the euphotic zone.