Luo Jia-Chen, Li Si-Yue
Chongqing Institute of Green and Intelligent Technology, Chinese Academy of Sciences, Chongqing 400074, China.
University of Chinese Academy of Sciences, Beijing 100049, China.
Huan Jing Ke Xue. 2018 Nov 8;39(11):5217-5226. doi: 10.13227/j.hjkx.201803059.
Diurnal and seasonal characterization of CO partial pressure (CO) and CO areal flux (CO) at the water-air interface in an anthropogenic river in the Three Gorges Reservoir area was studied. A tributary of the Jialing River in Chongqing Municipality was chosen, and daily and seasonal samples were taken in summer and autumn, focusing on riverine (CO), (CO), and their associated controls. Henry's law combined with the thin boundary layer model was adopted to estimate the CO flux via the water-air interface. The results indicated that (CO) was not high on average, namely (87.8±27.5) mmol·(m·d) and (139.2±34.0) mmol·(m·d) in summer and autumn, respectively. The water-air interface (CO) showed significant hourly, daily, and seasonal variations. CO release peaked around 09:00 and then slightly decreased. We also found that pH, alkalinity, water, and temperature were significantly related to (CO) and (CO), whereas pH and alkalinity were the best predictors of (CO). This study aids understanding of the impacts of urbanization on CO emissions in the rivers and helps to re-evaluate local riverine CO budgets.
研究了三峡库区一条人工河流中，水-气界面处一氧化碳分压（CO）和一氧化碳面积通量（CO）的日变化和季节特征。选取了重庆市嘉陵江的一条支流，在夏季和秋季采集了每日和季节性样本，重点关注河流中的（CO）、（CO）及其相关控制因素。采用亨利定律结合薄边界层模型，通过水-气界面估算一氧化碳通量。结果表明，（CO）平均水平不高，夏季和秋季分别为（87.8±27.5）mmol·(m·d)和（139.2±34.0）mmol·(m·d)。水-气界面处的（CO）呈现出显著的每小时、每日和季节性变化。一氧化碳释放量在09:00左右达到峰值，随后略有下降。我们还发现，pH值、碱度、水温与（CO）和（CO）显著相关，而pH值和碱度是（CO）的最佳预测指标。本研究有助于理解城市化对河流中一氧化碳排放的影响，并有助于重新评估当地河流的一氧化碳收支情况。
