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