...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Atmospheric chemistry and physics >Modelling multi-phase halogen chemistry in the coastal marine boundary layer: investigation of the relative importance of local chemistry vs. long-range transport
【24h】

Modelling multi-phase halogen chemistry in the coastal marine boundary layer: investigation of the relative importance of local chemistry vs. long-range transport

机译：在沿海海洋边界层中模拟多相卤素化学物质：研究局部化学物质与远距离运输的相对重要性

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

摘要

Measurements of significant concentrations of IO, I2 and BrO in a semi-polluted coast environment at Roscoff, in North-West France, have been made as part of the Reactive Halogens in the Marine Boundary Layer (RHaMBLe) campaign undertaken in September 2006. We use a one-dimensional column model, with idealised I2 emissions predicted using macroalgael maps and tidal data from the littoral area surrounding Roscoff, to investigate the probable causes for these observations. The coupled microphysical and chemical aerosol model simulates mixed-phase halogen chemistry using two separate particle modes, seasalt and non-seasalt, each comprising of eight size-sections. This work confirms the finding of a previous study that the BrO measurements are most likely caused by unknown, local sources. We find that the remote observations of IO and I2 are best replicated using the I2 recycling mechanism suggested by previous studies, but that such a mechanism is not wholly necessary. However in-situ measurements of I2 can only be explained by invoking an I2 recycling mechanism. We suggest that focussed observations of the changes in NOx and NOy concentrations, as well as changes in the nitrate fraction of the non-seasalt aerosol mode, in the presence of I2 bursts could be used to determine the atmospheric relevance of the predicted I2 recycling mechanism.
机译：作为法国海洋边界层中反应性卤素的一部分，已经对法国西北部罗斯科夫的半污染海岸环境中的IO，I 2 和BrO的高浓度进行了测量。 ）运动于2006年9月进行。我们使用一维列模型，使用宏观藻类图和来自Roscoff周围沿海地区的潮汐数据预测的理想I 2 排放量，调查了这些观察结果的可能原因。耦合的微物理和化学气溶胶模型使用两个单独的粒子模式（海盐和非海盐）模拟混合相卤素化学，每个模式均包含八个尺寸截面。这项工作证实了先前研究的发现，即BrO测量很可能是由未知的本地来源引起的。我们发现，使用以前的研究提出的I 2 回收机制，可以最好地复制IO和I 2 的远程观测，但是这种机制并不是完全必要的。但是，只能通过调用I 2 回收机制来解释I 2 的原位测量。我们建议集中观察在存在以下情况下NO x 和NO y 浓度的变化以及非海盐气溶胶模式的硝酸盐含量的变化。 I 2 爆发可用于确定预测的I 2 再循环机制的大气相关性。

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