Application of an optical nitrate profiler to high-and low-turbidity coastal shelf waters  

作　　者：Yanpei Zhuang Yangjie Li Xizhen Liu Shichao Tian Bin Wang Zhongqiang Ji Haiyan Jin Jianfang Chen 

机构地区：[1]Polar and Marine Research Institute,Jimei University,Xiamen,361000,China [2]Key Laboratory of Marine Ecosystem Dynamics,Second Institute of Oceanography,Ministry of Natural Resources,Hangzhou,310012,China [3]Marine Monitoring and Forecasting Center of Zhejiang Province,Hangzhou,310000,China [4]Institute for Geology,University of Hamburg,Hamburg,20000,Germany [5]State Key Laboratory of Satellite Ocean Environment Dynamics,Second Institute of Oceanography,Ministry of Natural Resources,Hangzhou,310012,China

出　　处：《Acta Oceanologica Sinica》2023年第1期103-108,共6页海洋学报（英文版）

基　　金：The National Key Research and Development Program of China under contract No.2019YFE0120900;the Natural Science Foundation of Zhejiang Province under contract No.Y19D060024;the National Natural Science Foundation of China under contract Nos U1709202 and 41806228;the Project of Long-term Observation and Research Plan in the Changjiang Estuary and Adjacent East China Sea(LORCE).

摘　　要：Here,we report the results of high-resolution nitrate measurements using an optical nitrate profiler(in situ ultraviolet spectrophotometer,ISUS)along transect across a high-turbidity shelf(East China Sea)and a low-turbidity shelf(Chukchi Sea).The ISUS-measured nitrate concentrations closely reproduced the results measured by conventional bottle methods in low-turbidity waters.However,for high-turbidity waters of the East China Sea(salinity<30),a correction factor of 1.19 was required to match the standard bottle measurements.The high-resolution ISUS data revealed subtle spatial variability(e.g.,a subsurface nitrate minimum)that may have been missed if based solely on bottle results.Four main structures of the nitracline on the East China Sea are apparent from the ISUS nitrate profile.High-resolution nitrate data are important for studying nitrate budgets and nutrient dynamics on continental shelves.

关 键 词：high-resolution nitrate measurements in situ ultraviolet spectrophotometer(ISUS) nutrient dynamics nitracline East China Sea Chukchi Sea 

分 类 号：P716.5[天文地球—海洋科学]