摘要
胶州湾毗邻青岛市区,是受人类活动影响显著的海湾。开展胶州湾水-气界面CO2通量研究,有助于厘清受人类活动严重干扰下的边缘海（湾）CO2源汇的控制机制。根据2013年4月在胶州湾走航连续观测所得pCO2数据,结合水文、化学和生物等要素的同步观测资料及以往本课题组获取的冬季2、3月份航次数据,对胶州湾海域pCO2分布及影响因素进行了分析探讨。结果表明：表层海水pCO2测得值在392--1 648μatm之间,平均值为496μatm。4月份胶州湾水体垂直混合均匀,且水柱对表层碳酸盐体系的影响显著。4月份胶州湾浮游生物初级生产弱于2、3月份,而生物的好氧呼吸作用要强于2、3月份。因此,生物好氧呼吸作用的增强是4月份胶州湾表现为大气CO2源的主要原因,同时温度升高也是导致胶州湾冬季到春季表层pCO2升高的重要因素,其影响程度仅次于生物好氧呼吸作用。总体来说,4月份胶州湾表现为大气CO2的源,水-气界面CO2交换通量在-8.22~490.68mmol·m-2·d-1之间,平均值为17.34mmol·m-2·d-1。
Jiaozhou Bay,which is adjacent to Qingdao City,is badly affected by human activities.The study of air-sea CO2 flux in Jiaozhou bay contributes to clarifying the controlling mechanisms of CO2 in the CMS which are affected seriously by human activities.Based on continuous underway measurements of pCO2,some other relating parameters（DIC,pH,Chla,DO,DOC et al）in spring（April,2013）and the data acquired in winter（February and March,published）,distribution and controlling factors of pCO2 in the Jiaozhou Bay were discussed.The results showed that the surface pCO2 ranged from 392 to 597μatm,with an average of 459μatm.Water in Jiaozhou Bay mixed very well vertically during April,which badly affected carbonate system of the sea surface.Compared with the winter（February and March）,primary production was weaker while organic matter degradation was much stronger in the spring（April）.Therefore,organic matter degradation was responsible for Jiaozhou Bay as an atmospheric CO2 source in the spring.In addition temperature is one of the main factors that increased surface pCO2 from winter to spring in Jiaozhou bay,and its contribution is a little smaller than that of biological processes.The whole Jiaozhou Bay acted as a source of atmosphere CO2 and air-sea CO2 flux in Jiaozhou Bay ranged from-11.87mmol·m-2·d-1 to 479.58mmol·m-2·d-1,with an average level of 16.63mmol·m-2·d-1 during April.
出处
《中国海洋大学学报（自然科学版）》
CAS
CSCD
北大核心
2015年第4期95-102,共8页
Periodical of Ocean University of China
基金
国家自然科学基金项目(41376123)
中国科学院战略性先导科技专项(XDA11020303)资助
关键词
胶州湾
PCO2
温度
好氧呼吸
初级生产
Jiaozhou Bay
pCO2
temperature
primary production
respiration
