globalchange  > 影响、适应和脆弱性
DOI: 10.1007/s00531-014-1040-7
Scopus记录号: 2-s2.0-84939881681
论文题名:
Measurements of volcanic SO<inf>2</inf> and CO<inf>2</inf> fluxes by combined DOAS, Multi-GAS and FTIR observations: a case study from Turrialba and Telica volcanoes
作者: Conde V.; Robidoux P.; Avard G.; Galle B.; Aiuppa A.; Muñoz A.; Giudice G.
刊名: International Journal of Earth Sciences
ISSN: 14373254
出版年: 2014
卷: 103, 期:8
起始页码: 2335
结束页码: 2347
语种: 英语
英文关键词: DOAS ; FTIR ; Multi-GAS ; Volcanic SO2 and CO2 fluxes
英文摘要: Over the past few decades, substantial progress has been made to overcome the technical difficulties of continuously measuring volcanic SO2 emissions. However, measurements of CO2 emissions still present many difficulties, partly due to the lack of instruments that can directly measure CO2 emissions and partly due to its strong atmospheric background. In order to overcome these difficulties, a commonly taken approach is to combine differential optical absorption spectroscopy (DOAS) by using NOVAC scan-DOAS instruments for continuous measurements of crateric SO2 emissions, and electrochemical/NDIR multi-component gas analyser system (multi-GAS) instruments for measuring CO2/SO2 ratios of excerpts of the volcanic plume. This study aims to quantify the representativeness of excerpts of CO2/SO2 ratios measured by Multi-GAS as a fraction of the whole plume composition, by comparison with simultaneously measured CO2/SO2 ratios using cross-crater Fourier transform infrared spectroscopy (FTIR). Two study cases are presented: Telica volcano (Nicaragua), with a homogenous plume, quiescent degassing from a deep source and ambient temperature, and Turrialba volcano (Costa Rica), which has a non-homogeneous plume from three main sources with different compositions and temperatures. Our comparison shows that in our “easier case” (Telica), FTIR and Multi-GAS CO2/SO2 ratios agree within a factor about 3 %. In our “complicated case” (Turrialba), Multi-GAS and FTIR yield CO2/SO2 ratios differing by approximately 13–25 % at most. These results suggest that a fair estimation of volcanic CO2 emissions can be provided by the combination of DOAS and Multi-GAS instruments for volcanoes with similar degassing conditions as Telica or Turrialba. Based on the results of this comparison, we report that by the time our measurements were made, Telica and Turrialba were emitting approximately 100 and 1,000 t day−1 of CO2, respectively. © 2014, Springer-Verlag Berlin Heidelberg.
URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84939881681&doi=10.1007%2fs00531-014-1040-7&partnerID=40&md5=772136c47033254360ea4d3de0c9c353
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/70455
Appears in Collections:影响、适应和脆弱性
气候减缓与适应

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作者单位: Department of Earth and Space Sciences, Chalmers University of Technology, Hörsalsvägen 11, Göteborg, Sweden; Dipartimento di Scienzedella Terra e del Mare, Università degli Studi di Palermo, Via Archirafi, 22, Palermo, Italy; Observatorio Vulcanológico y Sismológico de Costa Rica (OVSICORI-UNA), Apdo 2346-3000, Heredia, Costa Rica; Istituto Nazionale di Geofisica e Vulcanologia, Sezione di Palermo, Via Ugo La Malfa, 153, Palermo, Italy; Instituto Nicaraguese de Estudios Territoriales (INETER), Apdo. Postal 2110, Managua, Nicaragua

Recommended Citation:
Conde V.,Robidoux P.,Avard G.,et al. Measurements of volcanic SO<inf>2</inf> and CO<inf>2</inf> fluxes by combined DOAS, Multi-GAS and FTIR observations: a case study from Turrialba and Telica volcanoes[J]. International Journal of Earth Sciences,2014-01-01,103(8)
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