闽江下游夏季二氧化碳分压日变化特征——以福州江心公园为例  

Diurnal Variation of Summer CO Partial Pressure in the Lower Reaches of Minjiang River: an Example of Jiangxin Park in Fuzhou

作　　者：王声钰 钱伟[1] 杨平[1] 黄佳芳[1] WANG Shengyu;QIAN Wei;YANG Ping;HUANG Jiafang(Key Laboratory for Humid Subtropical Eco-geographical Processes of the Ministry of Education,Fujian Normal University/School of Geographical Sciences,Fujian Normal University/Wetland Ecosystem Research Station of Minjiang Estuary,State Forestry and Grassland Administration,Fuzhou 350007,China)

机构地区：[1]福建师范大学湿润亚热带生态地理过程教育部重点实验室,福建师范大学地理科学学院,国家林业和草原局福建闽江河口湿地生态系统国家定位观测研究站,福建福州350007

出　　处：《福建师范大学学报（自然科学版）》2020年第6期89-96,共8页Journal of Fujian Normal University：Natural Science Edition

基　　金：国家自然科学基金资助项目(41601102、41801070)。

摘　　要：对闽江下游夏季表层水体的二氧化碳分压(简记为p)进行测定,探讨河流表层水体中p及水-气界面CO2通量在感潮段的时间变化特征及其影响因素.结果表明,闽江下游夏季p介于217~2539 Pa之间,均值为(1011.06±654.13)Pa;河流CO2通量变化范围为-1.15~13.10 mmol·m-2·d-1,平均值为(4.48±5.13)mmol·m-2·d-1,总体表现为大气CO2的弱源;p与电导率、营养盐组成呈现显著正相关关系(p<0.05),与DO呈现极显著负相关关系(p<0.01).The carbon dioxide partial pressure(p) in the surface water of the lower reaches of Minjiang River was measured in summer.The characteristics about the temporal changes of p and CO2 flux of surface water from a tidal reach and their influencing factor were discussed combined with the hydrological conditions.The results showed that p during summer in the lower reaches of Minjiang River was between 217~2 539 Pa,the mean value was(1 011.06±654.13) Pa. The CO2 fluxs from the river ranged from-1.15 to 13.10 mmol·m-2·d-1 and the mean value was(4.48±5.13) mmol·m-2·d-1,and acted as a weak source of atmospheric CO2. p and conductivity and nutrient were positively correlated(P< 0.05),there was a very significant negative correlation with DO(P<0.01).

关 键 词：闽江 CO2分压 CO2通量 水-气界面 环境因子 

分 类 号：X144[环境科学与工程—环境科学]