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引用本文:姚骁,李哲,郭劲松,林初学,陈永柏,李翀.水-气界面CO2通量监测的静态箱法与薄边界层模型估算法比较.湖泊科学,2015,27(2):289-296. DOI:10.18307/2015.0213
YAO Xiao,LI Zhe,GUO Jinsong,LIN Chuxue,CHEN Yongbai,LI Chong.Comparison between closed static chamber method and thin boundary layer method on monitoring air-water CO2 diffusion flux. J. Lake Sci.2015,27(2):289-296. DOI:10.18307/2015.0213
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水-气界面CO2通量监测的静态箱法与薄边界层模型估算法比较
姚骁1, 李哲2,3,4, 郭劲松2,3, 林初学4, 陈永柏4, 李翀4
1.重庆大学城市建设与环境工程学院, 重庆 400045;2.中国科学院水库水环境重点实验室, 重庆 400714;3.中国科学院重庆绿色智能技术研究院, 重庆 400714;4.中国长江三峡集团公司, 北京 100038
摘要:
模型估算法与静态箱法是水-气界面气体通量监测的主要方法,因原理不同监测结果通常存在一定差异.目前对引起上述差异的主要环境因素仍不清晰.本研究使用自行设计的静态箱对三峡支流澎溪河水-气界面CO2通量进行监测,并与同步开展的CO2通量薄边界层模型估算法结果相比较,探讨该水域引起这两种监测方法结果产生差异的主要环境因素.结果表明,瞬时风速、水汽温差及水深均会对静态箱法及模型估算法的监测结果产生影响.风速越强、水汽温差越大、水深越大,这两种方法监测结果的差异就越小;而水域面积对两种方法的差异没有影响.比较发现,两种方法所获通量数据呈显著正相关,但静态箱法所获通量数据离散性显著高于薄边界层模型估算法.从方法的稳定性角度,在峡谷河道型水库水体温室气体监测中薄边界层模型估算法可能更为适宜.
关键词:  静态箱法  薄边界层模型估算法  CO2通量  环境因素
DOI:10.18307/2015.0213
分类号:
基金项目:国家自然科学基金项目(51179125)、中国科学院西部行动计划项目(KZCX2-XB3-14)和重庆市自然科学基金重点项目(CSTC2012JJB20004)联合资助.
Comparison between closed static chamber method and thin boundary layer method on monitoring air-water CO2 diffusion flux
YAO Xiao1, LI Zhe2,3,4, GUO Jinsong2,3, LIN Chuxue4, CHEN Yongbai4, LI Chong4
1.College of Urban Construction and Environmental Engineering, Chongqing University, Chongqing 400045, P. R. China;2.Key Laboratory of Reservoir Aquatic Environment, Chinese Academy of Sciences, Chongqing 400714, P. R. China;3.Chongqing Institute of Green and Intelligence Technology, Chinese Academy of Sciences, Chongqing 400714, P. R. China;4.China Three Gorges Corporation, Beijing 100038, P. R. China
Abstract:
Closed static chamber method and thin boundary layer method are frequently applied in monitoring air-water gas diffusive fluxes. However, there are differences in results between the methods due to theoretical principles which are still unclear. A type of closed static chamber was applied in Pengxi River, Three Gorges Reservoir to monitor air-water CO2 flux and compared with the results from thin boundary layer method that simultaneously monitored to discuss the causes for the differences. Results indicated that wind speed, air-water temperature difference, and depth of the water were the impact factors related to the difference between the methods above. It was found that the smaller difference between the methods above was created by the higher wind speed, or the greater air-water temperature difference, or the greater water depth. However, water surface area showed no significant impact on the difference between the methods. Through a comparison of CO2 fluxes data sets from the methods, it could be noted that there was a significant positive correlation on the monitoring results of the CO2 fluxes.But monitoring results from the closed static chamber method had higher variance compared to thin boundary layer method.From the viewpoint of the stability of the methods, the thin boundary layer method might be more feasible in the river-channel based reservoir area.
Key words:  Closed static chamber method  thin boundary layer method  CO2 flux  environmental factor
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