辽河口海域N<sub>2</sub>O分布特征和海气通量研究

关道明; 赵化德; 姚子伟

辽河口海域N₂O分布特征和海气通量研究

国家海洋局, 国家海洋环境监测中心海洋环境监测质量技术室, 辽宁, 大连, 116023

基金项目: 国家自然科学基金资助项目(40676060)

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出版历程
- 收稿日期: 2008-06-30
- 修回日期: 2008-11-05

The distribution and flux of nitrous oxide in the Liaohe Estuary area

Analysis and Measurement Division, National Marine Environmental Monitoring Center, State Oceanic Administralion, Dalian 116023, China

摘要

摘要: 于2007年5月份(枯水期)和8月份(丰水期)采集辽河口区域大气样品及水样,应用气相色谱及静态顶空法测定大气及海水中溶解N₂O的浓度,并计算不同站位的N₂O通量。结果表明:辽河口区域水体中溶解N₂O浓度存在着明显的时空变化,5月份河口区域水体中N₂O浓度高于8月份,且河流段溶解N₂O浓度大于近海岸海域。水中溶解N₂O浓度及溶解氧浓度呈显著的负相关关系。在枯水期和丰水期,所有站位的N₂O均处于过饱和状态,N₂O气体从水体向大气排出,辽河口区域是大气中N₂O的一个排放源。
- 辽河口 /
- N₂O /
- 分布 /
- 通量
Abstract: The samples of air and water in the Liaohe Estuary in China were collected in spring and summer. The static head space and gas-chromatography method was employed to determine the concentrations of nitrous oxide in air and in seawater. The result showed a temporal and spatial characteristic of distribution of nitrous oxide dissolved in water. The result showed that the concent rations of dissolved nitrous oxide in water were higher in spring than that in summer. The concentrations of dissolved nitrous oxide in the Liaohe River were higher than in coastal area. There was a notable negative correlation between the concentrations of N₂O and DO dissolved in the seawater Nitrous oxide dissolved in water was supersat urated in all surface water that was sampled in May and August Nitrous oxide released from water to air,and the Liaohe Estuary area represented a source of atmosphere nitrous oxide during the study period.
- Liaohe Estuary /
- nitrous oxide /
- distribution /
- flux

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