南海北部文石饱和度的分布及控制  

Distribution and controls of aragonite saturation state in the Northern South China Sea

作　　者：吕洪刚 韩萍 王晋[3] 田琳[3] 姜亦飞[1] 王先桥 LV Hong-gang;HAN Ping;WANG Jin;TIAN Lin;JIANG Yi-fei;WANG Xian-qiao(Key Laboratory of Research on Marine Hazards Forecasting,National Marine Environmental Forecasting Center,Beijing 100081,China;Shandong Urban Construction Vocational College,Jinan 250100,China;Key Laboratory of Marine Environment and Ecology,Ministry of Education,College of Environmental Science and Engineering,Ocean University of China,Qingdao 266100,China)

机构地区：[1]国家海洋局海洋灾害预报技术研究重点实验室,北京100081 [2]山东城市建设职业学院,山东济南250100 [3]中国海洋大学海洋环境与生态教育部重点实验室,山东青岛266100

出　　处：《海洋环境科学》2020年第1期75-80,共6页Marine Environmental Science

基　　金：国家海洋局海洋灾害预报技术研究重点实验室开放基金项目(LoMF1705);青年科学基金(41406036);国家重点研发计划(2017YFC1403306)

摘　　要：基于2011年8月底和9月初对南海北部两个断面水文参数和碳酸盐参数的调查结果,探讨了南海北部文石饱和度(Ωarag)的分布特征;并基于一个双端元混合模型,分析了上升流带来的物理混合和生物过程对Ωarag的影响。结果表明:珠江口外A断面的近岸区域受到上升流影响,而海南岛外B断面则不受上升流影响且水体呈现明显的分层现象。A、B断面的Ωarag范围分别在1.87~3.05和1.77~3.29之间,低值主要出现在A断面的近岸上升流区和B断面的深层水。基于一个双端元混合模型对A断面的分析,发现上升流带来的高CO2水体涌升最大可使Ωarag降低0.37,而近岸区好氧呼吸分解有机物释放的CO2造成Ωarag降低高达0.7,离岸区初级生产的发生则使Ωarag最大升高了0.1。在海南岛外的B断面,深层水发生好氧呼吸释放CO2是造成其Ωarag偏低的主要原因。Based upon surveys conducted in August and September 2011,the distribution characteristics of aragonite saturation state(Ωarag) were investigated in the Northern South China Sea.Based on a two end-member mixing model,the contributions to Ωarag from two processes associated with upwelling:physical transport vs.biological production were analyzed.Results showed that transect A off the Pearl estuary was influenced by upwelling,while transect B off the Hainan Island was highly stratified.Ωarag ranged from 1.87~3.05 along transect A and 1.77~3.29 along transect B.Low Ωarag values primarily occurred in the upwelling area along transect A and deep water along transect B.Using a two end-member mixing model,we found that physical transport induced a Ωarag decrease of up to 0.37.Aerobic respiration in the nearshore area caused Ωarag to decrease by up to 0.7,while in the offshore area,biological production caused Ωarag to increase by 0.1.In contrast,excess CO2 derived from aerobic respiration in the deep water contributed to low Ωarag along transect B.

关 键 词：南海北部 文石饱和度 上升流 好氧呼吸 

分 类 号：X142[环境科学与工程—环境科学]