| 长江口潮滩沉积物－水界面无机氮交换通量 |
| |
| 引用本文： | 陈振楼,王东启,许世远,张兴正,刘杰.长江口潮滩沉积物－水界面无机氮交换通量[J].地理学报,2005,60(2):328-336. |
| |
| 作者姓名： | 陈振楼 王东启 许世远 张兴正 刘杰 |
| |
| 作者单位： | 华东师范大学资源与环境科学学院,地理信息科学教育部重点实验室,上海,200062 |
| |
| 基金项目： | 国家自然科学基金;教育部优秀青年教师资助计划;上海市重点基础研究项目 |
| |
| 摘 要： | 对长江口滨岸潮滩7个典型断面三态氮的界面交换通量进行了三年多的季节性连续观测，结果表明无机氮的界面交换行为存在复杂的空间分异和季节变化。NO3^--N和NH4^--N的界面交换通量正负变化范围较大，分别介于-32．82-24．13mmol．m^-2．d^-3和-18．45～10．65mmol．m^-2．d^-3之间；而NO2^--N的界面交换通量很小，仅为-1．15-2．82mmol．m^-2．d^-1。NO3^--N的界面交换具有明显的上下游季节性时空分异特征，而NH4^ -N的界面交换则表现为南北岸季节性时空分异现象。盐度是控制长江口滨岸潮滩NH4^ -N界面交换行为的主要因素，而沉积物粒度、水体NO3^--N浓度、沉积物有机质含量、水温和溶解氧含量则以不同的组合方式，共同制约着NO3^ -N在潮滩界面交换的时空分异格局。
|
| 关 键 词： | 无机氮 交换通量 沉积物-水界面 潮滩 长江口 |
| 收稿时间： | 2004-09-16 |
| 修稿时间： | 2004年9月16日 |
Inorganic Nitrogen Fluxes at the Sediment-water Interface in Tidal Flats of the Yangtze Estuary |
| |
| CHEN Zhenlou,WANG Dongqi,XU Shiyuan,ZHANG Xingzheng,LIU Jie.Inorganic Nitrogen Fluxes at the Sediment-water Interface in Tidal Flats of the Yangtze Estuary[J].Acta Geographica Sinica,2005,60(2):328-336. |
| |
| Authors: | CHEN Zhenlou WANG Dongqi XU Shiyuan ZHANG Xingzheng LIU Jie |
| |
| Institution: | Key Laboratory of Geographical Information Science of the Ministry of Education, College of Resource and Environmental Science, East China Normal University, Shanghai 200062, China |
| |
| Abstract: | Inorganic nitrogen fluxes at the sediment-water interface of seven typical sites in tidal flats of the Yangtze estuary had been determined seasonally during more than three years. The results revealed that the sediment-water exchanges of inorganic nitrogen appeared to be of complicated spatial differences and seasonal variations. The measured fluxes of NO-3-N and NH+4-N in the Yangtze estuary were higher than those in other estuaries, varying respectively from -32.82 to 24.13 mmol·m-2·d-1 and from -18.45 to 10.65 mmol·m-2·d-1. However, the fluxes of NO-2/sub>-N were very low, and only varied from -1.15 to 2.82 mmol·m-2·d-1. The spatial and seasonal differences between the upper and lower estuary for the NO-3-N fluxes were observed clearly, but the NH+4-N fluxes exhibited the spatial and seasonal differences between the south and north bank. It had been recognized that the NH+4-N exchange behavior was mainly controlled by the salinity, whereas the NO-3-N exchange behavior was influenced by the different combinations of the sediment grain size, nitrate concentration in overlying water, sediment organic matter content, water temperature and dissolved oxygen concentration. |
| |
| Keywords: | inorganic nitrogen exchange flux sediment-water interface tidal flat Yangtze estuary |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
| 点击此处可从《地理学报》浏览原始摘要信息 |
| 点击此处可从《地理学报》下载免费的PDF全文 |
|
