大亚湾不同海洋功能区表层海水无机碳体系的比较研究  

Comparative study of dissolved inorganic carbon systems of surface waters in various oceanic functional areas of Daya Bay

作　　者：韩婷婷[1] 齐占会[1] 吴风霞[1] 廖秀丽[1] 马胜伟[1] 付贵权[1] 黄洪辉[1] 

机构地区：[1]中国水产科学研究院南海水产研究所广东省渔业生态环境重点实验室农业部南海渔业资源开发利用重点实验室,广东广州510300

出　　处：《热带海洋学报》2016年第2期57-65,共9页Journal of Tropical Oceanography

基　　金：中央级公益性科研院所基本科研业务费资助项目(2014A01YY03;2014TS01);广东省自然科学基金项目(2014A030310331);农业部南海渔业资源开发利用重点实验室开放基金资助项目(LSF2014-05);农业部海洋渔业可持续发展重点实验室开放课题(2013-SDMFMA-KF-1);海南省社会发展科技专项(SF201443)~~

摘　　要：于2014 年分4 个季度对大亚湾4 个典型功能区（人工鱼礁区、水产养殖区、核电站温排区和石化排污区）以及湾口区表层海水的温度、盐度、pH、总碱度（TA）等进行了调查, 比较分析了不同区域表层水体溶解无机碳（DIC）体系的组成和分布特征, 估算了海-气界面CO2 的交换通量（FCO2）, 并对FCO2 的主要影响因素进行了分析.结果显示, 调查海域表层水体的DIC、HCO3^– 、CO3^2–浓度和CO2 分压pCO2 年变化范围分别为1248.8±1841.9μmol·kg^–1（1624.8±143.1μmol·kg^–1）、1069.2±1615.7μmol·kg^–1 （1382.5±126.1μmol·kg^–1）、152.7-283.5μmol·kg^–1（236.2±35.4μmol·kg^–1）、11.4-44.9Pa （21.2？7.4Pa）; 各区域间的DIC、HCO3^– 、CO3^2–和pCO2 无显著差异（P〉0.05）.表层海水FCO2 的年变化范围为–37.3-4.5mmol·（m^2·d）^–1[–22.4±9.8mmol·（m2·d）^–1], 各区域FCO2（按正负数值大小）的季节变化呈现夏季〉秋季〉春季〉冬季的特征, 且夏季显著高于其他季节（P〈0.05）; 在全年尺度上, 各区域的FCO2 均为负值, 表现为大气CO2 的汇, 碳汇强度呈现湾口区〉鱼礁区〉排污区〉温排区〉养殖区的特征, 而各区域间无显著差异（P〉0.05）.偏回归分析显示, 大亚湾湾口区和养殖区的FCO2时空分布主要受盐度影响, 在鱼礁区和温排区主要受温度的影响, 而在排污区则主要受海水pH 的影响.In four different seasons during March-December 2014, four oceanic function areas in Daya Bay, including in an artificial reef area, an aquaculture area, a thermal discharge area, and a petrochemical sewage discharge area, as well as the bay mouth area, were selected as the survey areas. Data of surface temperature, salinity, pH, and total alkalinity (TA) were analyzed to show the distribution of dissolved inorganic carbon (DIC) system, and to estimate sea-air CO2 flux (FCO2) and its influential factors. The results showed that the concentrations of surface DIC, HCO3–, CO32–, andpCO2ranged from 1248.8 to 1841.9μmol·kg–1(1624.8±143.1μmol·kg–1), 1069.2 to 1615.7μmol·kg–1(1382.5±126.1μmol·kg–1), 152.7 to 283.5μmol·kg–1 (236.2±35.4μmol·kg–1), 11.4 to 44.9 Pa (21.2?7.4 Pa), respectively. There were no significant differences among the surveyed areas in terms of concentrations of DIC, HCO3–, CO32–, andpCO2 (P> 0.05).FCO2 ranged from–37.3 to 4.5 mmol·(m2·d) –1 [–22.4? 9.8 mmol·(m2·d)–1]. The seasonal variation ofFCO2showed an order of summer > autumn > spring > winter, according to positive or negative data; and this parameter in summer was significantly higher than those in the other seasons (P< 0.05). At the annual scale,FCO2in each investigated area had a negative value, indicating a sink of atmosphere CO2. The distribution of regional carbon sink was in the order of bay mouth area > artificial reef area > petrochemical sewage discharge area > thermal discharge area > aquaculture area, no significant difference being found among these areas (P> 0.05). Based on partial regression coefficients, salinity was the main influencing factor forFCO2 in the bay mouth area and agriculture area; water temperature was, in the artificial reef area and thermal discharge area; and pH was, in the petrochemical sewage discharge area.

关 键 词：大亚湾 溶解无机碳体系 CO2分压pCO2 交换通量 功能区 

分 类 号：P734[天文地球—海洋化学]