Using triple oxygen isotopes and oxygen-argon ratio to quantify ecosystem production in the mixed layer of northern South China Sea slope region

IOCAS-IR

	Using triple oxygen isotopes and oxygen-argon ratio to quantify ecosystem production in the mixed layer of northern South China Sea slope region
	Zhuoyi Zhu ; Jun Wang ; Guiling Zhang ; Sumei Liu ; Shan Zheng ; Xiaoxia Sun; Dongfeng Xu ; Meng Zhou
发表期刊	Acta Oceanologica Sinica
ISSN	0253-505X
	2021-06-15
出版年	2021
卷号	v.40 期号:06 页码:5-19
文献类型	CNKI期刊论文
摘要	Quantifying the gross and net production is an essential component of carbon cycling and marine ecosystem studies.Triple oxygen isotope measurements and the O_2/Ar ratio are powerful indices in quantifying the gross primary production and net community production of the mixed layer zone,respectively.Although there is a substantial advantage in refining the gas exchange term and water column vertical mixing calibration,application of mixed layer depth history to the gas exchange term and its contribution to reducing indices error are unclear.Therefore,two cruises were conducted in the slope regions of the northern South China Sea in October 2014(autumn) and June 2015(spring).Discrete water samples at Station L07 in the upper 150 m depth were collected for the determination of δ~(17)0,δ~(18)O,and the O_2/Ar ratio of dissolved gases.Gross oxygen production(GOP) was estimated using the triple oxygen isotopes of the dissolved O_2,and net oxygen production(NOP) was calculated using O_2/Ar ratio and O_2 concentration.The vertical mixing effect in NOP was calibrated via a N_2O based approach.GOP for autumn and spring was(169±23) mmol/(m~2·d)(by O_2) and(189±26) mmol/(m~2·d)(by O_2),respectively.While NOP was 1.5 mmol/(m~2·d)(by O_2) in autumn and 8.2 mmol/(m~2·d)(by O_2) in spring.Application of mixed layer depth history in the gas flux parametrization reduced up to 9.5% error in the GOP and NOP estimations.A comparison with an independent O_2 budget calculation in the diel observation indicated a26% overestimation in the current GOP,likely due to the vertical mixing effect.Both GOP and NOP in June were higher than those in October.Potential explanations for this include the occurrence of an eddy process in June,which may have exerted a submesoscale upwelling at the sampling station,and also the markedly higher terrestrial impact in June.
关键词	gross primary production net community production triple oxygen isotopes O_2/Ar air-sea gas flux piston velocity
CNKI专辑号	A;
CNKI专辑名称	基础科学;
CNKI专题号	A006;A010;
CNKI专题名称	生物学;海洋学;
分类号	Q178.53
收录类别	中科院核心 ; 中科院扩展
语种	英文;
资助项目(基金）	The National Key Research and Development Programs of China of the Ministry of Science and Technology under contract Nos 2020YFA0608301 and 2014CB441503 ; the National Natural Science Foundation of China under contract Nos 41976042 and 41776122 ; the Fundamental Research Funds for the Central Universities ; the Taishan Scholars Program of Shandong Province,China
文献类型	CNKI期刊论文
条目标识符	http://ir.qdio.ac.cn/handle/337002/187748
专题	中国科学院海洋研究所
作者单位	1.SchoolofOceanography,ShanghaiJiaoTongUniversity 2.StateKeyLaboratoryofEstuarineandCoastalResearch,EastChinaNormalUniversity 3.StateKeyLaboratoryofSatelliteOceanEnvironmentDynamics,SecondInstituteofOceanography,MinistryofNaturalResources 4.KeyLaboratoryofMarineChemistryTheoryandTechnologyofMinistryofEducation,OceanUniversityofChina 5.LaboratoryforMarineEcologyandEnvironmentalScience,PilotNationalLaboratoryforMarineScienceandTechnology(Qingdao) 6.JiaozhouBayNationalMarineEcosystemResearchStation,InstituteofOceanology,ChineseAcademyofSciences
推荐引用方式 GB/T 7714	Zhuoyi Zhu,Jun Wang,Guiling Zhang,et al. Using triple oxygen isotopes and oxygen-argon ratio to quantify ecosystem production in the mixed layer of northern South China Sea slope region. 2021.