• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Geosciences >Ground-Based Measurements of the 2014–2015 Holuhraun Volcanic Cloud (Iceland)
【24h】

Ground-Based Measurements of the 2014–2015 Holuhraun Volcanic Cloud (Iceland)

机译：2014–2015 Holuhraun火山云（冰岛）的地面测量

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

摘要

The 2014–2015 Bárearbunga fissure eruption at Holuhraun in central Iceland was distinguished by the high emission of gases, in total 9.6 Mt SO 2 , with almost no tephra. This work collates all ground-based measurements of this extraordinary eruption cloud made under particularly challenging conditions: remote location, optically dense cloud with high SO 2 column amounts, low UV intensity, frequent clouds and precipitation, an extensive and hot lava field, developing ramparts, and high-latitude winter conditions. Semi-continuous measurements of SO 2 flux with three scanning DOAS instruments were augmented by car traverses along the ring-road and along the lava. The ratios of other gases/SO 2 were measured by OP-FTIR, MultiGAS, and filter packs. Ratios of SO 2 /HCl = 30–110 and SO 2 /HF = 30–130 show a halogen-poor eruption cloud. Scientists on-site reported extremely minor tephra production during the eruption. OPC and filter packs showed low particle concentrations similar to non-eruption cloud conditions. Three weather radars detected a droplet-rich eruption cloud. Top of eruption cloud heights of 0.3–5.5 km agl were measured with ground- and aircraft-based visual observations, web camera and NicAIR II infrared images, triangulation of scanning DOAS instruments, and the location of SO 2 peaks measured by DOAS traverses. Cloud height and emission rate measurements were critical for initializing gas dispersal simulations for hazard forecasting.
机译：冰岛中部Holuhraun的2014–2015年Bárearbunga裂隙喷发的特点是气体排放量很高，总计9.6 Mt SO 2，几乎没有特非拉。这项工作整理了在极具挑战性的条件下进行的这种非常规喷发云的所有地面测量结果：偏远位置，具有高SO 2柱量的光密云，紫外线强度低，频繁的云和降水，广阔而炎热的熔岩场，正在发展的城墙，以及冬季高纬度条件。沿环形道路和熔岩的汽车横移增加了使用三种扫描DOAS仪器对SO 2通量进行的半连续测量。其他气体/ SO 2的比率通过OP-FTIR，MultiGAS和过滤器包进行测量。 SO 2 / HCl = 30–110和SO 2 / HF = 30–130的比率显示出贫卤喷发云。现场科学家报告说，在喷发期间，极少的红喉苔产量。 OPC和滤袋显示出低浓度的颗粒，类似于非喷发云的情况。三台气象雷达探测到了富液滴喷发云。通过地面和飞机的目视观测，网络摄像头和NicAIR II红外图像，扫描DOAS仪器的三角测量以及通过DOAS遍历测量的SO 2峰位置，可以测量出0.3-5.5 km agl的喷发云高。云高和排放率的测量对于初始化气体扩散模拟以进行危险性预测至关重要。

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