Degree of nutrient consumption as an aging index of upwelling or vertically mixed water in the northern Taiwan Strait

作     者：CHEN Chentung Arthur HSING Liyu 

作者机构：Institute of Marine Geology and Chemistry National Sun Yat-sen University Kaohsiung ChinaInstitute of Marine Geology and Chemistry National Sun Yat-sen University Kaohsiung China 

出 版 物：《Acta Oceanologica Sinica》 (海洋学报（英文版）)

年 卷 期：2005年第24卷第1期

页      面：115-124页

核心收录：

学科分类：0710[理学-生物学] 0908[农学-水产] 07[理学] 0707[理学-海洋科学] 

基　　金：The authors wish to thank the Taiwan 'Science Council' for supporting this research(NSC 92-2611-M-110-014) 

主　　题：upwelling degree of nutrient consumption Taiwan Strait dissolved organic nitrogen dissolved organic phosphorus 

摘      要：In order to determine the relative aging status of upwelled or vertically mixed water in the northern Taiwan Strait, a recently developed method of calculating the degree of nutrient consumption (DNC) was employed. Upwelling was detected at a water depth of about 75 m in summer. Bottom waters in the aphotic zone and newly-upwelled waters in the euphoric zone were found to be low in terms of their DNC. In general, a low DNC was noted alongside the other traditional upwelling indicators, such as lower temperature and degree of oxygen saturation, but higher salinity, apparent oxygen utilization, nutrient contents and chlorophyll-a. Enhanced vertical mixing, but without an apparent upwelling signal, was detected near the same location in winter.