Stable gas plume composition measured by OP‐FTIR spectroscopy at Masaya Volcano, Nicaragua, 1998–1999
Stable gas plume composition measured by OP‐FTIR spectroscopy at Masaya Volcano, Nicaragua, 1998–1999
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1998-1999 年尼加拉瓜马萨亚火山通过 OP-FTIR 光谱测量的稳定气体羽流成分
DOI：
10.1029/1999gl008383
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发表时间：
1999
影响因子：
5.2
通讯作者：
C. Oppenheimer
中科院分区：
文献类型：
--
作者：
L. Horrocks;M. Burton;P. Francis;C. Oppenheimer
我们报告了1998年和1999年在尼加拉瓜的马萨亚火山山顶通过开放路径傅里叶变换红外（OP-FTIR）光谱收集的非喷发羽流气体成分数据。马萨亚的烟羽的特征是SO2/HCl和HCl/HF的质量比分别为2.8-3.0和8.1-8.2。与COSPEC SO2排放率数据相结合，这些比率表明HCl和HF的平均排放率分别为7.3千克-1和0.9千克-1。气体成分非常一致，在几天、几周甚至相隔一年的两个观测期之间几乎没有时间变化。这种惊人的均匀性最好用稳态开放系统脱气来解释。
We report non‐eruptive plume gas composition data collected by open‐path Fourier transform infrared (OP‐FTIR) spectroscopy at the summit of Masaya Volcano, Nicaragua, in 1998 and 1999. Masaya's plume is characterised by SO2/HCl and HCl/HF mass ratios of 2.8–3.0 and 8.1–8.2 respectively. When combined with COSPEC SO2 emission rate data, these ratios indicate average emission rates of HCl and HF of 7.3 kgs−1 and 0.9 kgs−1. The gas composition is remarkably consistent, showing little temporal variation on the scale of days, weeks or even between the two observation periods, one year apart. Such striking uniformity is best explained by steady‐state open system degassing.