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北京和邢台新粒子生成的差别及其对CCN活性的影响

高颖 王玉莹 李占清 金筱艾 王靖凌 胡嵘 曾思琪 张睿 陈曦 许嘉璐

高颖, 王玉莹, 李占清, 等. 2021. 北京和邢台新粒子生成的差别及其对CCN活性的影响[J]. 大气科学, 46(X): 1−11 doi: 10.3878/j.issn.1006-9895.2107.21013
引用本文: 高颖, 王玉莹, 李占清, 等. 2021. 北京和邢台新粒子生成的差别及其对CCN活性的影响[J]. 大气科学, 46(X): 1−11 doi: 10.3878/j.issn.1006-9895.2107.21013
GAO Ying, WANG Yuying, LI Zhanqing, et al. 2021. Differences in the Effects of New Particle Formation on Cloud Condensation Nuclei Activity in Beijing and Xingtai [J]. Chinese Journal of Atmospheric Sciences (in Chinese), 46(X): 1−11 doi: 10.3878/j.issn.1006-9895.2107.21013
Citation: GAO Ying, WANG Yuying, LI Zhanqing, et al. 2021. Differences in the Effects of New Particle Formation on Cloud Condensation Nuclei Activity in Beijing and Xingtai [J]. Chinese Journal of Atmospheric Sciences (in Chinese), 46(X): 1−11 doi: 10.3878/j.issn.1006-9895.2107.21013

北京和邢台新粒子生成的差别及其对CCN活性的影响

doi: 10.3878/j.issn.1006-9895.2107.21013
基金项目: 国家自然科学基金青年项目42005067、42030606,国家重点研发计划项目 2017YFC1501702,江苏省高等学校大学生创新训练计划项目 202010300056Y
详细信息
    作者简介:

    高颖,女,1998年出生,学士,主要从事大气环境与大气化学研究,E-mail: gao990606@163.com

    通讯作者:

    王玉莹,E-mail: yuyingwang@nuist.edu.cn

  • 中图分类号: P421.1

Differences in the Effects of New Particle Formation on Cloud Condensation Nuclei Activity in Beijing and Xingtai

Funds: Youth Program of National Natural Science Foundation of China (Grants 42005067, 42030606),National Key Basic Research and Development Program of China (Grant 2017YFC1501702),College Students' Innovative Entrepreneurial Training Plan Program in Jiangsu Province (Grant 202010300056Y)
  • 摘要: 基于2016年冬季和2017年夏季在北京、2016年夏季在邢台的三次气溶胶外场观测实验,选取三次观测期间典型的新粒子生成事件,分析其对气溶胶吸湿和云凝结核(CCN)活化特性的影响。两地分别位于华北平原北部超大城市区域和中南部工业化区域,两地不同季节新粒子形成机制不同,对应的凝结汇、生长速率以及气溶胶化学组分也不同。北京站点新粒子生成事件的发生以有机物的生成主导,而邢台站点新粒子生成事件的发生则以硫酸盐和有机物的生成共同主导。邢台站点新粒子生成过程中气溶胶吸湿性及云凝结核活化能力明显强于北京站点,此特点在核模态尺度粒子中表现尤为明显。以上结果表明,在估算新粒子生成对CCN数浓度的影响时,应充分考虑气溶胶吸湿和活化特性的差异。
  • 图  1  北京(BJ)、邢台(XT)观测站点在地形高度图中的位置

    Figure  1.  Locations of Beijing (BJ) and Xingtai (XT) sampling sites in the topographic elevation map

    图  2  北京2016年冬季(左列)、北京2017年夏季(中间列)和邢台2016年夏季(右列)三次观测实验新粒子生成事件中的(a–c)气溶胶数浓度尺度谱(PNSD)的日变化、(d–e)三种模态粒子数浓度(N,单位:cm−3)和(g–i)凝结汇(Cs)的日变化

    Figure  2.  Diurnal variations of (a–c) aerosol particle number size distribution (PNSD), (d–e) aerosol number concentration (N, units: cm−3) in three modes, and (g–i) condensation sinks (Cs) during the selected new particle formation (NPF) events in the three experiments in Beijing winter 2016 (left), Beijing Summer 2017 (middle) and Xingtai summer 2016(right)

    图  3  北京冬季(左列)、北京夏季(中间列)和邢台夏季(右列)三次观测实验新粒子生成事件中的气溶胶化学组分质量浓度的平均日变化(第一行),各类化学组分质量占比的平均日变化(第二行)以及各类化学组分的平均质量占比(第三行)。图例中给出的分别为有机物(Organic,简称Org)、硫酸盐(Sulfate,简称SO4)、硝酸盐(Nitrate,简称NO3)、铵盐(Ammonium sal,简称NH4)、氯盐(Chloride salt,简称Chl)和黒碳(Black carbon,简称BC)

    Figure  3.  Diurnal variations of the mass concentrations (top line) and mass fractions of aerosol chemical compositions (second line); the mass fractions of aerosol chemical compositions (bottom line) during the selected new particle formation (NPF) events in the three experiments in Beijing winter (left), Beijing Summer (middle) and Xingtai summer (right). The legend shows organic matter (Org), sulfate (SO4), nitrate (NO3), ammonium salt (NH4), chloride (Chl) and black carbon (BC)

    图  4  三次观测实验新粒子生成事件中的细粒子(PM1)气溶胶化学组分质量浓度对比

    Figure  4.  Comparison of the mass concentrations of aerosol chemical compositions in PM1 (the particulate matter with diameter less than or equal to 1 μm) during the selected new particle formation (NPF) events in the three experiments.

    图  5  北京冬季(左列)、北京夏季(中间列)和邢台夏季(右列)三次观测实验新粒子生成事件中的吸湿性参数(κ)日变化(第一行)和不同过饱和度(SS)下CCN数浓度日变化(第二行)

    Figure  5.  Diurnal variations of aerosol hygroscopicity parameters (top line) and CCN number concentrations at different supersaturation (SS) levels (bottom line) during the selected new particle formation (NPF) events in the three experiments in Beijing winter (left), Beijing Summer (middle) and Xingtai summer (right)

    图  6  三次观测实验中新粒子生成事件中(a)不同粒径粒子的吸湿性参数和(b)不同过饱和度(SS)下CCN数浓度增强因子的对比

    Figure  6.  Comparisons of (a) hygroscopicity parameters and (b) enhancement ratios of CCN number concentrations at different supersaturation (SS) levels during the selected new particle formation (NPF) events in the three experiments

    表  1  三次观测实验新粒子生成事件中的粒径增长速率

    Table  1.   Aerosol growth rates (Gr) in selected NPF events during the three experiments

    地区季节粒径增长速率/nm h−1
    北京冬季1.8
    夏季2.4
    邢台夏季2.0
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