渤海夏季海水pCO_(2)分布及其调控机制研究  

Study on the distribution and regulation mechanism of pCO_(2)in the Bohai Sea in summer

作　　者：尹晓敏 邓雪 魏雅雯 刘茜[1] YIN Xiaomin;DENG Xue;WEI Yawen;LIU Qian(Frontiers Science Center for Deep Ocean Multispheres and Earth System,and Key Laboratory of Marine Chemistry Theory and Technology,Ministry of Education,Ocean University of China,Qingdao 266100,China;National Marine Environment Monitoring Center,Dalian 116023,China;Tianjin Key Laboratory of Marine Resources and Chemistry,Tianjin University of Science and Technology,Tianjin 300457,China)

机构地区：[1]中国海洋大学,深海圈层与地球系统前沿科学中心和海洋化学理论与工程技术教育部重点实验室,山东青岛266100 [2]国家海洋环境监测中心,辽宁大连116023 [3]天津科技大学,天津市海洋资源与化学重点实验室,天津300457

出　　处：《海洋环境科学》2025年第2期201-211,共11页Marine Environmental Science

基　　金：国家海洋环境监测中心博士科研启动基金(2022-Z-302);天津市海洋资源与化学重点实验室(天津科技大学)开放基金资助项目(202204);国家自然科学基金面上基金项目(42276040)。

摘　　要：科学评估近海海水二氧化碳分压(pCO_(2))的分布及其调控机制对于评估我国海域海-气CO_(2)交换通量和实现“碳中和”目标具有重要意义。本研究利用2014年和2021年夏季现场调查数据,分析了渤海海水pCO_(2)的分布特征、控制因素以及海-气CO_(2)交换通量。研究结果表明:(1)2014年8月渤海海域pCO_(2)为270~1060μatm,高值区位于辽东湾、渤海湾和莱州湾;2021年8月渤海中部海域pCO_(2)为313~697μatm,高值区位于渤海海峡及近黄河口区域。(2)皮尔逊相关性分析结果显示,生物活动是影响渤海夏季pCO_(2)分布的主要因素;高pCO_(2)河流的输入使得渤海pCO_(2)本底值较高,随着离岸距离的增加,逐渐增强的生物光合作用使得渤海中部海域pCO_(2)有所降低。(3)夏季渤海是大气CO_(2)的源,各海域海-气CO_(2)交换通量存在差异,莱州湾最高,辽东湾和渤海湾相近,中部海域最低。The scientific assessment of the distribution and mechanism of seawater partial pressure of carbon dioxide(pCO_(2))in the coastal sea is important for evaluating the air-sea CO_(2)exchange flux over China seas and achieving the goal of“carbon neutrality”.In this study,we investigated the distribution,controlling factors,and air-sea CO_(2)exchange flux in the Bohai Sea using the underway data from the summer of 2014 and 2021.The results showed that(1)the Bohai Sea pCO_(2)ranged from 270 to 1060μatm in August 2014,and the high values occurred in the Liaodong Bay,Bohai Bay,and Laizhou Bay;while pCO_(2)in the central region of the Bohai Sea ranged from 313 to 697μatm in August 2021,and the high values occurred near the Bohai Strait and the Yellow River estuary.(2)Based on the Pearson correlation analysis,biological activity was the main factor affecting the distribution of pCO_(2)in the Bohai Sea in summer,and freshwater input from high pCO_(2)rivers led to a high background value of pCO_(2)in the Bohai Sea;the enhanced biological photosynthesis led to a decrease in pCO_(2)in the central region of the Bohai Sea as the offshore distance increases.(3)The Bohai Sea was a source of atmospheric CO_(2)in summer;there were differences in the air-sea CO_(2)exchange flux between different regions;that was,the air-sea CO_(2)exchange flux in the Laizhou Bay was higher than Liaodong Bay and Laizhou Bay,while the central Bohai Sea had the lowest air-sea CO_(2)exchange flux.

关 键 词：渤海 海水pCO_(2) 时空分布 影响因素 海-气CO_(2)交换通量 

分 类 号：P734[天文地球—海洋化学] X142[天文地球—海洋科学]