| 厦门市近15年无机氮湿沉降的变化情况 |
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| 引用本文： | 陈法锦,劳齐斌,李志阳,周凤霞,孟亚飞,沈春燕,朱庆梅,张书文.厦门市近15年无机氮湿沉降的变化情况[J].海洋湖沼通报,2019(2):97-106. |
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| 作者姓名： | 陈法锦 劳齐斌 李志阳 周凤霞 孟亚飞 沈春燕 朱庆梅 张书文 |
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| 作者单位： | 广东海洋大学海洋与气象学院广东省近海海洋变化与灾害预警重点实验室;中国热带农业科学院广州实验站 |
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| 基金项目： | 国家自然科学基金(41476066;41476010;41403003);广东省自然科学基金(2016A030312004;2016A030313754);广东省高等学校优秀青年教师培养计划项目(Yq2014004);广东海洋大学创新强校项目(GDOU2014050201)资助 |
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| 摘 要： | 为了研究厦门市大气湿沉降中的无机氮情况,分析了2000～2014年厦门市内和郊区的雨水中NO_3^--N和NH_4^+-N的浓度及其沉降通量的变化情况,并对湿沉降中无机氮对厦门近海海水生态系统的影响进行讨论。结果表明,厦门市内和郊区雨水中NO_3^--N和NH_4^+-N的浓度均为春季较高,夏季较低;高浓度无机氮在一年中出现的时间段在两个区域有差别,这可能与这两个区域的季风转换和大气混合层高度变化有关。在2000～2014年,雨水中NO_3^--N的浓度在市内总体呈下降趋势,在郊区总体呈上升趋势;NH_4^+-N浓度的年变化规律不明显。湿沉降给厦门近岸海域带来的NO_3^--N和NH_4^+-N的量分别为1056 t/a和1278 t/a,低于该区域河流输入的无机氮的量的10%,说明湿沉降不是厦门近岸海域海水中无机氮的主要来源。通过比较厦门雨水和近岸海水中的营养盐情况,发现雨水的沉降可能会促进厦门近海部分区域海水中浮游植物的生长。
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| 关 键 词： | 大气湿沉降 无机氮 沉降通量 富营养化 厦门 |
Change in Wet Deposition of Inorganic Nitrogen in Xiamen in Recent 15 Years |
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| CHEN Fajin,LAO Qibin,LI Zhiyang,ZHOU Fengxia,MENG Yafei,SHEN Chunyan,ZHU Qingmei,ZHANG Shuwen.Change in Wet Deposition of Inorganic Nitrogen in Xiamen in Recent 15 Years[J].Transaction of Oceanology and Limnology,2019(2):97-106. |
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| Authors: | CHEN Fajin LAO Qibin LI Zhiyang ZHOU Fengxia MENG Yafei SHEN Chunyan ZHU Qingmei ZHANG Shuwen |
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| Institution: | (Provincial Key Laboratory for Coastal Ocean Variation and Disaster Prediction Technologies of Guangdong,Guangdong Ocean University,Zhanjiang,Guangdong 524088 ,China;Chinese Academy of Tropical Agricultural Sciences Guangzhou Experimental Station,Guangzhou 510140,China) |
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| Abstract: | The NO3^--N and NH4^+-N in atmospheric wet deposition in Xiamen were studied based on the rainwater investigation from 2000 to 2014 in urban and rural areas of Xiamen.The results showed that concentrations of NO3^--N and NH4^+-N in rainwater of the urban and rural areas were both higher in spring and lower in summer than in other seasons.Higher concentrations of NO3^--N and NH4^+-N in a year were delayed in the rural area compared with those in the urban area,which may be influenced by the monsoon transformation and the variation of atmospheric mixing layer.From 2000 to 2014,the concentration of NO3^--N in rainwater of the urban area generally decreased generally but increased in the rural area.No obvious annual variation was found for NH4^+-N in both areas.The wet deposition were estimated to bring 1,056 and 1,278 t/a of NO3^--N and SiO3^2-Si in the coastal area of Xiamen.The wet deposition amount was less than 10%of those brought by river runoff,indicating that the wet deposition was not the main source of in organic nitrogen for the coastal area of Xiamen.Based on the nutrient data in both rainwater and seawater,we concluded that higher nitrogen concentration in atmospheric wet deposition may cause phytoplankton to increase in part of the sea area near Xiamen. |
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| Keywords: | Atmosphere wet deposition inorganic nitrogen deposition flux eutrophication Xiamen |
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