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中国科学院大学学报 ›› 2014, Vol. 31 ›› Issue (3): 322-328.DOI: 10.7523/j.issn.2095-6134.2014.03.005

• 大气颗粒物与空气污染专刊 • 上一篇    下一篇

北京冬季气溶胶吸湿性的观测与分析

王轩1,2, 陈建华1, 耿春梅1, 任丽红1, 陈建民3, 叶兴南3, 杨文1   

  1. 1. 中国环境科学研究院, 北京 100012;
    2. 中国气象科学研究院, 北京 100081;
    3. 复旦大学, 上海 200433
  • 收稿日期:2013-07-15 修回日期:2013-09-23 发布日期:2014-05-15
  • 通讯作者: 陈建华,E-mail:chenjh@craes.org.cn
  • 基金资助:

    国家自然科学基金(21277132)和国家环境保护公益性行业科研专项(201309046)资助

Hygroscopic properties of the ambient aerosols observed in winter in Beijing

WANG Xuan1,2, CHEN Jianhua1, GENG Chunmei1, REN Lihong1, CHEN Jianmin3, YE Xingnan3, YANG Wen1   

  1. 1. Chinese Research Academy of Environmental Sciences, Beijing 100012, China;
    2. Chinese Academy of Meteorological Sciences, Beijing 100081, China;
    3. Fudan University, Shanghai 200433, China
  • Received:2013-07-15 Revised:2013-09-23 Published:2014-05-15

摘要:

采用HTDMA(加湿迁移差分分析)法于2009年12月8—20日测量了北京气溶胶吸湿性,并讨论气溶胶吸湿性影响因素.实验发现,北京气溶胶吸湿性生长因子冬季在1.01到1.40之间,呈现弱吸湿性和近憎水性特点.北京冬季气溶胶吸湿生长因子日变化呈现双峰分布和单峰分布2种规律.影响城市环境气溶胶吸湿性的主要因素是近憎水性组份和弱吸湿性组份在环境气溶胶中所占的比例.

关键词: 现场观测, 气溶胶, 吸湿性, 北京

Abstract:

By using HTDMA (hygroscopic tandem differential mobility analyzer) system, hygroscopicity of ambient aerosols was observed during 8-20 December 2009 in Beijing. It was found that the aerosol hygroscopic growth factor value varied between 1.01 and 1.40 in winter, showing weak hygroscopicity and nearly hydrophobicity. Daily variation of aerosol growth factor showed a bimodal mode (two peaks at midnight and noon and two valleys in the morning and evening rush hour) or a single-peak mode (a peak at midnight and a valley at noon). One of the major factors influencing aerosol hygroscopicity was the content of weak hygroscopic and nearly hydrophobic components in the ambient aerosol.

Key words: field observation, aerosols, hygroscopic properties, Beijing

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