...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Environmental Science & Technology >SOA Formation Potential of Emissions from Soil and Leaf Litter
【24h】

SOA Formation Potential of Emissions from Soil and Leaf Litter

机译：土壤和叶片凋落物排放的SOA形成潜力

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

Soil and leaf litter are significant global sources of small oxidized volatile organic compounds, VOCs (e.g., methanoi and acetaldehyde). They may also be significant sources of larger VOCs that could act as precursors to secondary organic aerosol (SOA) formation. To investigate this, soil and leaf litter samples were collected from the University of Idaho Experimental Forest and transported to the laboratory. There, the VOC emissions were characterized and used to drive SOA formation via dark, ozone-initiated reactions. Monoterpenes dominated the emission profile with emission rates as high as 228 μg-C m~(-2) h~(-1). The composition of the SOA produced was similar to biogenic SOA formed from oxidation of ponderosa pine emissions and α-pinene. Measured soil and Utter monoterpene emission rates were compared with modeled canopy emissions. Results suggest surface soil and litter monoterpene emissions could range from 12 to 136% of canopy emissions in spring and fall. Thus, emissions from leaf litter may potentially extend the biogenic emissions season, contributing to significant organic aerosol formation in the spring and fall when reduced solar radiation and temperatures reduce emissions from living vegetation.
机译：土壤和树叶凋落物是小型氧化性挥发性有机化合物（例如甲烷，乙醛）的重要全球来源。它们也可能是较大的VOC的重要来源，这些VOC可以作为二次有机气溶胶（SOA）形成的前体。为了对此进行调查，从爱达荷大学实验森林大学收集了土壤和叶子凋落物样品，并将其运送到实验室。在那里，VOC排放得到了表征，并用于通过臭氧引发的黑暗反应推动SOA的形成。单萜类化合物以228μg-Cm〜（-2）h〜（-1）的发射速率占据主导地位。所产生的SOA的组成类似于由黄松释放物和α-pine烯的氧化形成的生物SOA。将测得的土壤和乌特尔单萜的排放速率与模拟的冠层排放进行了比较。结果表明，春季和秋季，表层土壤和垃圾单萜的排放量可能占冠层排放量的12％至136％。因此，凋落物的排放可能会延长生物排放的季节，从而导致春季和秋季有机太阳能气溶胶的形成显着减少，因为减少的太阳辐射和温度会降低活体植被的排放。

著录项

  • 来源
    《Environmental Science & Technology》 |2014年第2期|938-946|共9页
  • 作者

    Celia L. Faiola; Graham S. VanderSchelden; Miao Wen; Farah C. Elloy; Douglas R. Cobos; Richard J. Watts; B. Thomas Jobson; Timothy M. VanReken;

  • 作者单位

    Laboratory for Atmospheric Research, Department of Civil & Environmental Engineering, Washington State University, Pullman, Washington 99164;

    Laboratory for Atmospheric Research, Department of Civil & Environmental Engineering, Washington State University, Pullman, Washington 99164;

    Laboratory for Atmospheric Research, Department of Civil & Environmental Engineering, Washington State University, Pullman, Washington 99164;

    Department of Civil & Environmental Engineering, Washington State University, Pullman, Washington 99164;

    Decagon Devices, Inc., Pullman, Washington 99163;

    Department of Civil & Environmental Engineering, Washington State University, Pullman, Washington 99164;

    Laboratory for Atmospheric Research, Department of Civil & Environmental Engineering, Washington State University, Pullman, Washington 99164;

    Laboratory for Atmospheric Research, Department of Civil & Environmental Engineering, Washington State University, Pullman, Washington 99164;

  • 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