...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Environmental Science & Technology >First Chemical Characterization of Refractory Black Carbon Aerosols and Associated Coatings over the Tibetan Plateau (4730 m a.s.l)
【24h】

First Chemical Characterization of Refractory Black Carbon Aerosols and Associated Coatings over the Tibetan Plateau (4730 m a.s.l)

机译：青藏高原（4730 m a.s.l）上难熔黑碳气溶胶及其相关涂层的首次化学表征

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Refractory black carbon (rBC) aerosol is an important climate forcer, and its impacts are greatly influenced by the species associated with rBC cores. However, relevant knowledge is particularly lacking at the Tibetan Plateau (TP). Here we report, for the first time, highly time-resolved measurement results of rBC and its coating species in central TP (4730 m a.s.l), using an Aerodyne soot particle aerosol mass spectrometer (SP-AMS), which selectively measured rBC-containing particles. We found that the rBC was overall thickly coated with an average mass ratio of coating to rBC (R-BC) of similar to 7.7, and the coating species were predominantly secondarily formed by photochemical reactions. Interestingly, the thickly coated rBC was less oxygenated than the thinly coated rBC, mainly due to influence of the transported biomass burning organic aerosol (BBOA). This BBOA was relatively fresh but formed very thick coating on rBC. We further estimated the "lensing effect" of coating semiquantitatively by comparing the measurement data from a multiangle absorption photometer and SP-AMS, and found it could lead to up to 40% light absorption enhancement at R-BC 10. Our findings highlight that BBOA can significantly affect the "lensing effect", in addition to its relatively well-known role as light-absorbing "brown carbon."
机译：难熔黑碳（rBC）气溶胶是一种重要的气候作用力，其影响受与rBC核心相关的物种的影响很大。但是，青藏高原（TP）尤其缺乏相关知识。在这里，我们首次报道了使用Aerodyne烟灰颗粒气溶胶质谱仪（SP-AMS）对中央TP（4730 m asl）中的rBC及其涂层物质进行了高度时间分辨的测量结果，该方法选择性地测量了含rBC的物质粒子。我们发现，rBC总体上被厚涂层覆盖，涂层与rBC的平均质量比（R-BC）约为7.7，并且涂层种类主要是通过光化学反应形成的。有趣的是，厚涂层的rBC的氧含量比薄涂层的rBC少，这主要是由于运输的燃烧生物气溶胶（BBOA）的影响。该BBOA相对较新鲜，但在rBC上形成了非常厚的涂层。通过比较多角度吸收光度计和SP-AMS的测量数据，我们进一步定量评估了涂层的“透镜效应”，发现在R-BC> 10时，它可以导致高达40％的光吸收增强。 BBOA除了作为吸光“棕色碳”的相对众所周知的作用外，还可以显着影响“透镜效应”。

著录项

  • 来源
    《Environmental Science & Technology》 |2017年第24期|14072-14082|共11页
  • 作者

    Wang Junfeng; Zhang Qi; Chen Mindong; Collier Sonya; Zhou Shan; Ge Xinlei; Xu Jianzhong; Shi Jinsen; Xie Conghui; Hu Jianlin; Ge Shun; Sun Yele; Coe Hugh;

  • 作者单位

    Nanjing Univ Informat Sci & Technol, Sch Environm Sci & Engn, Collaborat Innovat Ctr Atmospher Environm & Equip, Jiangsu Key Lab Atmospher Environm Monitoring & P, Nanjing 210044, Jiangsu, Peoples R China;

    Nanjing Univ Informat Sci & Technol, Sch Environm Sci & Engn, Collaborat Innovat Ctr Atmospher Environm & Equip, Jiangsu Key Lab Atmospher Environm Monitoring & P, Nanjing 210044, Jiangsu, Peoples R China;

    Nanjing Univ Informat Sci & Technol, Sch Environm Sci & Engn, Collaborat Innovat Ctr Atmospher Environm & Equip, Jiangsu Key Lab Atmospher Environm Monitoring & P, Nanjing 210044, Jiangsu, Peoples R China;

    Univ Calif Davis, Dept Environm Toxicol, Davis, CA 95616 USA;

    Univ Calif Davis, Dept Environm Toxicol, Davis, CA 95616 USA;

    Nanjing Univ Informat Sci & Technol, Sch Environm Sci & Engn, Collaborat Innovat Ctr Atmospher Environm & Equip, Jiangsu Key Lab Atmospher Environm Monitoring & P, Nanjing 210044, Jiangsu, Peoples R China;

    Chinese Acad Sci, Northwest Inst Ecoenviron & Resources, State Key Lab Cryospher Sci, Lanzhou 730000, Gansu, Peoples R China;

    Lanzhou Univ, Coll Atmospher Sci, Lanzhou 730000, Gansu, Peoples R China;

    Chinese Acad Sci, Northwest Inst Ecoenviron & Resources, State Key Lab Cryospher Sci, Lanzhou 730000, Gansu, Peoples R China;

    Nanjing Univ Informat Sci & Technol, Sch Environm Sci & Engn, Collaborat Innovat Ctr Atmospher Environm & Equip, Jiangsu Key Lab Atmospher Environm Monitoring & P, Nanjing 210044, Jiangsu, Peoples R China;

    Nanjing Univ Informat Sci & Technol, Sch Environm Sci & Engn, Collaborat Innovat Ctr Atmospher Environm & Equip, Jiangsu Key Lab Atmospher Environm Monitoring & P, Nanjing 210044, Jiangsu, Peoples R China;

    Chinese Acad Sci, Inst Atmospher Phys, State Key Lab Atmospher Boundary Layer Phys & Atm, Beijing 100029, Peoples R China;

    Univ Manchester, Sch Earth & Environm Sci, Manchester M13 9PL, Lancs, England;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号