...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Atmospheric chemistry and physics >Analysis of atmospheric neutral and charged molecular clusters in boreal forest using pulse-height CPC
【24h】

Analysis of atmospheric neutral and charged molecular clusters in boreal forest using pulse-height CPC

机译：脉冲高度CPC分析北方森林大气中性和带电分子团簇

获取原文
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

We measured the size distribution of atmospheric neutral and chargedclusters and particles down to mobility diameter around 1.5 nm by applyingpulse-height CPC technique at SMEAR II station in Hyyti?l?, southernFinland during spring 2007 and May 2008. The concentration of molecularclusters smaller than 3 nm seems to be highly variable in boreal forestenvironment, the concentration varied typically between 500–50 000 cm−3.By comparing to concentrations measured with ion spectrometers,we conclude that ion clusters and neutral clusters produced by ion-ionrecombination are usually not sufficient to explain all of the observedclusters; the median fraction of recombination products from all neutralclusters was 4.9%. Before and during most new particle formation eventsthe cluster formation rate rose only slightly, or remained close to stable.Nocturnal formation of clusters was also frequently observed.
机译：我们在2007年春季和2008年5月期间，通过在南部芬兰Hyyti？l？的SMEAR II站采用脉冲高度CPC技术，测量了大气中性和带电团簇以及粒径小于1.5 nm的粒子的尺寸分布。分子团簇的浓度小于3在北方森林环境中，nm似乎变化很大，浓度通常在500-50000 cm −3 之间变化。与离子光谱仪测得的浓度相比，我们得出结论：离子产生的离子簇和中性簇-离子重组通常不足以解释所有观察到的簇;来自所有中性簇的重组产物的中位数分数为4.9％。在大多数新的颗粒形成事件之前和期间，团簇形成速率仅略有上升，或保持接近稳定。还经常观察到团簇的夜间形成。

著录项

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