黄海千里岩岛大气湿沉降营养盐的研究  

Nutrients of atmospheric wet deposition from the Qianliyan Island of the Yellow Sea

作　　者：韩丽君[1] 朱玉梅[1] 刘素美[1] 张经[2] 李瑞环[1] 

机构地区：[1]中国海洋大学化学化工学院,海洋化学理论与工程技术教育部重点实验室,山东青岛266100 [2]华东师范大学河口海岸学国家重点实验室,上海200062

出　　处：《中国环境科学》2013年第7期1174-1184,共11页China Environmental Science

基　　金：国家“973”项目(2011CB409802);国家自然科学基金资助项目(40925017,41221004)

摘　　要：于2009～2010年对黄海千里岩岛的雨水进行了收集,测定了其pH值、NH4+、NO3-+NO2-、SiO32-和PO43-的含量,讨论了黄海西部湿沉降的酸雨状况、营养盐各组分浓度的变化特征、沉降通量以及对黄海初级生产力的贡献.结果表明,大气湿沉降中58%的样品5.6<pH<7.0,以中性降水为主.营养盐浓度有明显的季节变化,春、冬两季浓度较高,夏、秋两季浓度较低.对不同区域雨水中DIN(NH4++NO3-+NO2-)浓度的对比和降雨事件的气团后向轨迹模拟分析以及历年湿沉降营养盐平均浓度变化特征的探讨,均表明人类活动产生的大气排放物和自然界的沙尘暴对大气湿沉降有明显影响.大气干湿总沉降向黄海输入的NH4+-N、DI(NO3-+NO2-)、SiO32--Si和PO43--P分别占大气沉降和河流输入总量的87%、47%、3%、53%.强降雨在短时间内可以显著提高表层海水的初级生产力,甚至可能成为赤潮的诱发因子.Rainwater samples were collected at the Qianliyan Island of the Yellow Sea for the period of 2009-2010 and analysed for pH and nutrient concentrations（i.e.NH4＋,NO3-＋ NO2-,SiO32-and PO43-）.The results showed that the pH values in 58% samples ranged from 5.6 to 7.0,dominated by neutral depositions.Concentrations of nutrients had seasonal variations,higher in spring and winter but relatively low in summer and autumn.Based on comparison of inorganic nitrogen concentrations in rainwater at different regions,the air-mass back-trajectory and annual variations,atmospheric wet depositions over the Yellow Sea were affected by the anthropogenic emissions as well as sand-dust storms.Furthermore,the historical overview of existing data indicated that atmospheric dry and wet depositions of NH4＋-N,DI（NO3-＋ NO2-）,SiO32--Si and PO43--P account for 87%,47%,3% and 53%,respectively,of total terrestrial（i.e.atmospheric depositions and riverine influx） input.Rainfall in this region can dramatically increase surface water nutrient level that enhance the primary productivity.

关 键 词：营养盐 湿沉降 初级生产力 气团后向轨迹分析 黄海 

分 类 号：X51[环境科学与工程—环境工程]