| 基于TBL模型的闽江口围垦养虾塘水-大气界面CO2扩散通量估算 |
| 摘要点击 1590 全文点击 509 投稿时间：2018-08-03 修订日期：2018-09-03 |
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| 中文关键词 闽江河口 养虾塘 二氧化碳 扩散通量 气体交换速率 模型 |
| 英文关键词 Minjiang River Estuary shrimp pond carbon dioxide diffusive flux gas exchange rate model |
| 作者 | 单位 | E-mail | | 张逸飞 | 福建师范大学地理科学学院, 福州 350007 | zhangyifei0304@126.com | | 杨平 | 福建师范大学地理科学学院, 福州 350007
福建师范大学亚热带湿地研究中心, 福州 350007
湿润亚热带生态地理过程教育部重点实验室, 福州 350007 | yangping528@sina.cn | | 赵光辉 | 福建师范大学地理科学学院, 福州 350007 | | | 李玲 | 福建师范大学地理科学学院, 福州 350007 | | | 谭立山 | 福建师范大学地理科学学院, 福州 350007 | | | 仝川 | 福建师范大学地理科学学院, 福州 350007
福建师范大学亚热带湿地研究中心, 福州 350007
湿润亚热带生态地理过程教育部重点实验室, 福州 350007 | tongch@fjnu.edu.cn |
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| 中文摘要 |
| 扩散模型是估算水生生态系统水-大气界面二氧化碳（CO2）交换通量的重要手段.选取多种参数化方法对闽江口围垦养虾塘水-大气界面CO2气体交换速率（kx）及CO2扩散通量进行估算，探讨闽江口围垦养虾塘kx及CO2扩散通量的变化特征及影响因素.结果表明：①养殖期水-大气界面CO2气体交换速率及其扩散通量均呈现显著的时间变化特征，分别表现为10月 > 9月 > 11月 > 7月 > 8月和11月 > 7月 > 8月 > 9月 > 10月的变化趋势；②风速、pH、水体CO2、DOC和叶绿素a（Chl-a）浓度是影响CO2扩散通量时间变化特征的重要因素；③不同参数化方法计算得出的闽江口养虾塘水-大气界面CO2扩散通量存在显著差异（P<0.01），表明模型方法估算养殖塘CO2扩散通量具有一定不确定性，综合分析认为模型RC01和CW03是估算闽江口围垦养虾塘水-大气界面CO2扩散通量较为合适的方法. |
| 英文摘要 |
| Freshwater aquatic ecosystems are important sources of greenhouse gases, such as CO2. However, few studies have presented data on the greenhouse gas flux from coastal aquaculture ponds. Diffusion models are important tools for estimating the CO2 exchange flux across the water-air interface of aquatic ecosystems. Several different parameterized means were selected to estimate the CO2 gas exchange rate (kx) and CO2 diffusive flux across the water-air interface of shrimp ponds in the Minjiang River Estuary. The results indicated that:① the CO2 gas exchange rate and diffusive flux over the culture period all presented significant temporal variation. This variation showed a dynamic trend:October > September > November > July > August and November > July > August > September > October. ② Wind speed, kx, CO2 concentration, pH, DOC concentration, and Chl-a concentration were important factors affecting the temporal variation of CO2 diffusive flux. ③ There were differences in the estimated value of CO2 diffusive flux across the water-air interface of the culture ponds in the Minjiang River Estuary among different parameterized approaches (P<0.01). This indicates that the model method has some uncertainties in estimating the CO2 diffusive flux in culture ponds. Our results suggest that the models RC01 and CW03 are more suitable methods for estimating the CO2 diffusive flux at the water-air interface of estuarine reclaimed aquaculture ponds in the Minjiang River Estuary, after comprehensive analysis of the water environment and the different estimation results. |
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