| 南京北郊秋冬季相对湿度及气溶胶理化特性对大气能见度的影响 |
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| 引用本文： | 于兴娜,马佳,朱彬,王红磊,严殊祺,夏航.南京北郊秋冬季相对湿度及气溶胶理化特性对大气能见度的影响[J].环境科学,2015,36(6):1919-1925. |
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| 作者姓名： | 于兴娜 马佳 朱彬 王红磊 严殊祺 夏航 |
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| 作者单位： | 南京信息工程大学气象灾害预报预警与评估协同创新中心,中国气象局气溶胶-云-降水重点开放实验室,南京 210044 |
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| 基金项目： | 中国科学院战略性先导科技专项(B类)(XDB05030104);国家自然科学基金项目(41475142);江苏省高等学校大学生实践创新训练计划项目(201510300053y,201510300065y);江苏省高校"青蓝工程"项目;江苏高校优势学科建设工程资助项目(PAPD) |
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| 摘 要： | 为了解南京北郊秋冬季相对湿度与气溶胶理化特性对大气能见度的影响,利用2012年秋冬季气象要素资料、颗粒物浓度及其主要成分和气溶胶粒子谱分布等观测数据,分析了南京北郊大气能见度与气象要素、颗粒物污染之间的关系.结果表明,南京北郊秋冬季节平均大气能见度仅为4.76 km.颗粒物浓度与能见度存在一定的负相关关系,尤其细粒子对能见度的影响更为显著.随细粒子质量浓度和相对湿度(RH)的增大,低能见度出现的频率呈现上升趋势.能见度从5~10 km衰减到5km时,PM10和PM2.1质量浓度分别增加了7.56%和37.64%;其中SO2-4和NO-3质量浓度均有显著增加.气溶胶粒子数浓度对能见度的影响与相对湿度有关,粒径0.5~2μm的气溶胶数浓度随RH增加增长缓慢,而2~10μm范围内的粒子数浓度随RH增加而减小;结合气溶胶表面积浓度与能见度进行相关性分析,表明0.5~2μm的细粒子及相对湿度是导致南京北郊秋冬季大气能见度下降的主要因素.
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| 关 键 词： | 能见度 气溶胶 相对湿度 尺度谱 南京 |
| 收稿时间： | 2014/11/20 0:00:00 |
| 修稿时间： | 2014/12/15 0:00:00 |
Effects of Relative Humidity and Aerosol Physicochemical Properties on Atmospheric Visibility in Northern Suburb of Nanjing |
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| YU Xing-n,MA Ji,ZHU Bin,WANG Hong-lei,YAN Shu-qi and XIA Hang.Effects of Relative Humidity and Aerosol Physicochemical Properties on Atmospheric Visibility in Northern Suburb of Nanjing[J].Chinese Journal of Environmental Science,2015,36(6):1919-1925. |
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| Authors: | YU Xing-n MA Ji ZHU Bin WANG Hong-lei YAN Shu-qi and XIA Hang |
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| Institution: | Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters, Key Laboratory for Aerosol-Cloud-Precipitation of China Meteorological Administration, Nanjing University of Information Science and Technology, Nanjing 210044, China;Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters, Key Laboratory for Aerosol-Cloud-Precipitation of China Meteorological Administration, Nanjing University of Information Science and Technology, Nanjing 210044, China;Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters, Key Laboratory for Aerosol-Cloud-Precipitation of China Meteorological Administration, Nanjing University of Information Science and Technology, Nanjing 210044, China;Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters, Key Laboratory for Aerosol-Cloud-Precipitation of China Meteorological Administration, Nanjing University of Information Science and Technology, Nanjing 210044, China;Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters, Key Laboratory for Aerosol-Cloud-Precipitation of China Meteorological Administration, Nanjing University of Information Science and Technology, Nanjing 210044, China;Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters, Key Laboratory for Aerosol-Cloud-Precipitation of China Meteorological Administration, Nanjing University of Information Science and Technology, Nanjing 210044, China |
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| Abstract: | |
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| Keywords: | visibility aerosol relative humidity particle spectrum distribution Nanjing |
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