Radium-traced nutrient outwelling from the Subei Shoal to the Yellow Sea:Fluxes and environmental implication

作     者：Jian’an Liu Dongyan Liu Jinzhou Du Jian'an Liu;Dongyan Liu;Jinzhou Du

作者机构：State Key Laboratory of Estuarine and Coastal ResearchEast China Normal UniversityShanghai 200241China 

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

年 卷 期：2022年第41卷第6期

页      面：12-21页

核心收录：

学科分类：083001[工学-环境科学] 0830[工学-环境科学与工程（可授工学、理学、农学学位）] 07[理学] 0707[理学-海洋科学] 08[工学] 

基　　金：The National Science and Technology Major Project of the Ministry of Science and Technology of China under contract No.2016YFC1402106 the National Natural Science Foundation of China under contract Nos 41376089,41576083,41976040,41876127 and 42030402 the China Postdoctoral Science Foundation under contract No.2020M671048 

主　　题：nutrient outwelling eddy diffusion submarine groundwater discharge radium isotopes Subei Shoal Yellow Sea 

摘      要：The Subei Shoal is the largest sandy ridge in the southern Yellow Sea and is important source for nutrient loading to the ***,the nutrient fluxes in the Subei Shoal associated with eddy diffusion and submarine groundwater discharge(SGD)were assessed to understand their impacts on the nutrient budget in the Yellow *** on the analysis of 223 Ra and 224 Ra in the field observation,the offshore eddy diffusivity mixing coefficient and SGD were estimated to be 2.3×10^(8)cm^(2)/s and 2.6×10^(9)m^(3)/d(16 cm/d),respectively,in the Subei *** the significant offshore decreasing gradients of nutrient in seawater of the Subei Shoal,the spatially integrated nutrient outwelling fluxes to the Yellow Sea were 262-1465μmol/(m^(2)·d)for DIN,5.2-21μmol/(m^(2)·d)for DIP and711-913μmol/(m^(2)·d)for *** to the riverine input,atmospheric deposition and mariculture,nutrient outwelling from the Subei Shoal might play an important role in nutrient budget of the Yellow *** nutrient fluxes could provide 4.1%-23%N and 1.3%-5.3%P requirements for the primary productivity,and the deviated DIN/DIP ratios have the potential to affect the growth of phytoplankton in the marine ecosystem of the Yellow Sea.