Walking traverse and scanning DOAS measurements of volcanic gas emission rates
Walking traverse and scanning DOAS measurements of volcanic gas emission rates
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DOI：
10.1029/2002gl015827
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发表时间：
2002-10-15
影响因子：
5.2
通讯作者：
Pyle, DM
中科院分区：
文献类型：
--
作者：
McGonigle, AJS;Oppenheimer, C;Pyle, DM
[1] 我们在这里报告了使用微型紫外光谱仪徒步获得的火山二氧化硫通量的首次测量结果。我们的测量基于差分光学吸收光谱 (DOAS)，于 2001 年 12 月在距马萨亚火山（尼加拉瓜）山顶约 1 公里处进行，得到的平均 SO2 排放率为 4 kg·s(-1)，与通过道路车辆行驶获得的一组同期测量值（平均 6 kg·s(-1)）相当。 SO2 通量估计值（平均 4 kg s(-1)）也是通过扫描羽流从固定位置获得的。这一通量范围证实了自 2000 年以来火山气体排放量明显减少。光谱仪的便携性和易用性为火山 SO2 排放的常规测量提供了相当大的范围，特别是在道路通行或空中活动机会有限的情况下。这些方法可以很容易地扩展到监测其他来源和气体。
[1] We report here the first measurements of volcanic SO2 fluxes obtained on foot, using a miniature ultraviolet spectrometer. Our measurements, based on differential optical absorption spectroscopy (DOAS), were performed approximate to 1 km from the summit of Masaya volcano (Nicaragua) in December 2001, and yielded a mean SO2 emission rate of 4 kg s(-1), comparable with a set of contemporaneous measurements obtained by road vehicle traverses (average 6 kg s(-1)). SO2 flux estimates (average 4 kg s(-1)) were also obtained from a fixed position by scanning the plume. This range of fluxes confirms an apparent decrease in gas output from the volcano since 2000. The portability and ease of use of the spectrometer offer considerable scope for routine measurements of SO2 emissions from volcanoes, especially where road access or opportunities for airborne campaigns are limited. These approaches can be readily extended to monitor other sources and gases.