Characteristics of daily variation of particulate organic carbon concentration in summer upwelling of southern Taiwan Strait
Participate organic carbon(POC) , chlorophyll a(chl-a)and total suspended matter(TSM)were analysed in the Taiwan Strait in the summer upwelling period in the cruises of 2004 ~2006. POC concentrations were found as 0.115 0 ~ 0.244 4, 0.139 1 ~ 0.650 8, 0.106 8 ~ 0.535 0 mg/dm3 in summer of 2004 ~ 2006, respectively. The average concentrations of POC in upwelling area were higher than other summer cruises. The ratio Cchi-a/CpoC was 0.002 ~ 0.024. The day-to-day changes in the concentration of POC and Cchi-a/CPOC reflected the in situ productivity contributed by POC and a well coupling with the upwelling process. The positive correlation between ratio Cchi-a/CPOCand chl-a was found in this three years. The relation of Cchi-a/CPOC, which was low in the upwelling are-a, and chl-a was different between the stable phase and decline phase. It suggests that there is a high trophic transfer efficiency along the food chain in upwelling dominated area. The relationship of day-to-day change in POC and TSM concentration was different in the summer of 2004 ~2006. The possibility of promotion and limitation on POC both existed by the influence of TSM, which varied from 0. 80 to 12. 50 mg/dm3 in the upwelling area. The variation of the ratio of organic matter in TSM was not clear. The day-to-day change in Cchi-a/CPOC, didn' t responded obviously to upwelling event. The negative correlation between ratio Cchi-a/CPOC and TSM was found, indicating that the contribution of POC to TSM decreased with increasing TSM. Because of the supply of terrestrial matter and the influence of biogeochemical processes of organic matter, the relation between CPOC/cTSM and cTSM, became much complicated.
NETL
NSTL
万方数据
维普
