img

官方微信

高级检索

中国沙漠 ›› 2016, Vol. 36 ›› Issue (3): 792-797.DOI: 10.7522/j.issn.1000-694X.2015.00054

• 天气与气候 • 上一篇    下一篇

格尔木地区沙尘气溶胶硝酸盐含量及来源

盛阳1, 杨胜利2,1, 韩永翔3, 郑秋凤1, 方小敏4   

  1. 1. 南京师范大学 地理科学学院/江苏省环境演变与生态建设重点实验室实验室, 江苏 南京 210023;
    2. 兰州大学 西部环境教育部重点实验室/资源环境学院, 甘肃 兰州 730000;
    3. 南京信息工程大学 大气物理学院, 江苏 南京 210044;
    4. 中国科学院青藏高原研究所, 北京 100101
  • 收稿日期:2015-01-09 修回日期:2015-02-11 出版日期:2016-05-20 发布日期:2016-05-20
  • 通讯作者: 杨胜利(Email:shlyang@lzu.edu.cn)
  • 作者简介:盛阳(1991-),女,湖南益阳人,硕士研究生,研究方向为大气沙尘与环境变化。Email:shengyang1220@126.com
  • 基金资助:

    国家自然科学基金项目(40972122);江苏高校优势学科建设工程项目

The Concentrations and Sources of Nitrate in Aerosol over Golmud, Qinghai, China

Sheng Yang1, Yang Shengli2,1, Han Yongxiang3, Zheng Qiufeng1, Fang Xiaomin4   

  1. 1. School of Geographical Science/Key Laboratory of Environmental Evolution and Ecological Construct of Jiangsu Province, Nanjing Normal University, Nanjing 210023, China;
    2. MOE Key Laboratory of Western China's Environmental Systems/College of Earth and Environmental Sciences, Lanzhou University, Lanzhou 730000, China;
    3. School of Atmospheric Physics, Nanjing University of Information Science& Technology, Nanjing 210044, China;
    4. Institute of Tibetan Plateau Research, Chinese Academy of Sciences, Beijing 100101, China
  • Received:2015-01-09 Revised:2015-02-11 Online:2016-05-20 Published:2016-05-20

摘要:

沙尘气溶胶中硝酸盐的含量和来源对于全球氮排放估算具有重要意义。为了探讨格尔木沙尘气溶胶中硝酸盐的含量和来源,我们在格尔木2008年沙尘过程多发期1-6月进行了连续观测,并对收集的沙尘气溶胶样品进行了详细的水溶性离子色谱分析。结果显示:沙尘天气的大气总悬浮颗粒物(TSP)平均浓度及NO3-平均浓度分别为2 015.94 μg·m-3和1.8 μg·m-3,非沙尘天气两者平均浓度分别为274.68 μg·m-3和0.74 μg·m-3。观测期间,格尔木NO3-浓度和TSP浓度存在明显的季节变化,NO3-和TSP浓度变化均为春季>夏季>冬季。TSP与NO3-浓度的相关系数为0.67,春季两者相关系数为0.71,且Ca2+与NO3-浓度显著相关,推测格尔木沙尘气溶胶中NO3-离子可能主要来源于干旱区的地表物质。非沙尘天气期间NO3-/TSP浓度比值高于沙尘天气,且分布较为分散,表明非沙尘天气NO3-浓度受到人为源或气象条件的影响。

关键词: 沙尘气溶胶, 离子分析, 硝酸盐, 格尔木

Abstract:

The study of particulate nitrate in the ambient air in continental area is of great importance to estimate the global nitrogen emission. To investigate the concentrations and sources of particulate nitrate in aerosol in the northern Tibetan Plateau, the water soluble(WS)nitrates were analyzed by ion chromatography for total suspended particulate(TSP)collected in Golmud from January to June, 2008. The average concentrations of TSP and the WS NO3- are 2 015.94 μg·m-3 and 1.8 μg·m-3 under dust condition, with 274.68 μg·m-3 and 0.74 μg·m-3 under non-dust condition, respectively. The concentrations of TSP and the WS NO3- show distinctive seasonal variations with a trend of spring>summer>winter. The correlation of the WS NO3- and TSP are quite obvious with a coefficient of r=0.67 for all samples and r=0.71 for the samples of spring in 2008. And the concentrations of NO3- have significant correlation with Ca2+. Thus we infer that the dust processes have mainly effects on the concentrations of the WS NO3-, and the surface soil should be the main sources for particulate nitrate. The ratios of NO3-/TSP are higher in dust samples than that of in non-dust samples, and the ratioes are scattered in non-dust samples. It indicates that the WS NO3- may mainly be affected by anthropogenic sources and local weather in non-dust conditions in Goumud.

Key words: dust aerosol, ionic analysis, nitrate, Golmud

中图分类号: