Unified quantitative observation of coexisting volcanic sulfur dioxide and sulfate aerosols using ground-based Fourier transform infrared spectroscopy
Unified quantitative observation of coexisting volcanic sulfur dioxide and sulfate aerosols using ground-based Fourier transform infrared spectroscopy
We developed an optimal-estimation algorithm to simultaneously retrieve, for the first time, coexisting volcanic gaseous SO2 and sulfate aerosols (SA) from ground-based Fourier transform infrared (FTIR) observations. These effluents, both linked to magmatic degassing process and subsequent atmospheric evolution processes, have overlapping spectral signatures leading to mutual potential interferences when retrieving one species without considering the other. We show that significant overestimations may be introduced in SO2 retrievals if the radiative impact of coexistent SA is not accounted for, which may have impacted existing SO2 long-term series, e.g. from satellite platforms. The method was applied to proximal observations at Masaya volcano, where SO2 and SA concentrations, and SA acidity, were retrieved. A gas-to-particle sulfur partitioning of 400 and a strong SA acidity (sulfuric acid concentration: 65 %) were found, consistent with past in situ observations at this volcano. This method is easily exportable to other volcanoes to monitor magma extraction processes and the atmospheric sulfur cycle in the case of ash-free plumes.
- PSL Research University France
- Rutherford Appleton Laboratory United Kingdom
- UK Research and Innovation United Kingdom
- UK Research and Innovation, Science and Technology Facilities Council, Rutherford Appleton Laboratory United Kingdom
- University of Salford United Kingdom
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Allard, P., Burton, M., and Muré, F.: Spectroscopic evidence for a lava fountain driven by previously accumulated magmatic gas, Nature, 433, 407-410, 2005. [OpenAIRE]
Allen, A. G., Oppenheimer, C., Ferm, M., Baxter, P. J., Horrocks, L. A., Galle, B., McGonigle, A. J. S., and Duffell, H. J.: Primary sulfate aerosol and associated emissions from Masaya Volcano, Nicaragua, J. Geophys. Res., 107, 4682, https://doi.org/10.1029/2002JD002120, 2002.
Biermann, U. M., Luo, B. P., and Peter, T.: Absorption Spectra and Optical Constants of Binary and Ternary Solutions of H2SO4, HNO3, and H2O in the Mid Infrared at Atmospheric Temperatures, J. Phys. Chem. A, 104, 783-793, https://doi.org/10.1021/jp992349i, 2000.
Burton, M., Allard, P., Muré, F., and La Spina, A.: Magmatic Gas Composition Reveals the Source Depth of SlugDriven Strombolian Explosive Activity, Science, 317, 227-230, https://doi.org/10.1126/science.1141900, 2007.
Burton, M. R., Oppenheimer, C., Horrocks, L. A., and Francis, P. W.: Remote sensing of CO2 and H2O emission rates from Masaya volcano, Nicaragua, Geology, 28, 915-918, https://doi.org/10.1130/0091- 7613(2000)28<915:RSOCAH>2.0.CO;2, 2000.
Carboni, E., Grainger, R., Walker, J., Dudhia, A., and Siddans, R.: A new scheme for sulphur dioxide retrieval from IASI measurements: application to the Eyjafjallajökull eruption of April and May 2010, Atmos. Chem. Phys., 12, 11417-11434, https://doi.org/10.5194/acp-12-11417-2012, 2012.
Carn, S. A., Fioletov, V. E., McLinden, C. A., Li, C., and Krotkov, N. A.: A decade of global volcanic SO2 emissions measured from space, Scientific Reports, 7, 44095, https://doi.org/10.1038/srep44095, 2017. [OpenAIRE]
de Moor, J. M., Fischer, T. P., Sharp, Z. D., King, P. L., Wilke, M., Botcharnikov, R. E., Cottrell, E., Zelenski, M., Marty, B., Klimm, K., Rivard, C., Ayalew, D., Ramirez, C., and Kelley, K. A.: Sulfur degassing at Erta Ale (Ethiopia) and Masaya (Nicaragua) volcanoes: Implications for degassing processes and oxygen fugacities of basaltic systems: Sulfur Degassing at Basaltic Volcanoes, Geochem. Geophy. Geosy., 14, 4076-4108, https://doi.org/10.1002/ggge.20255, 2013. [OpenAIRE]
de Moor, J. M., Kern, C., Avard, G., Muller, C., Aiuppa, A., Saballos, A., Ibarra, M., LaFemina, P., Protti, M., and Fischer, T. P.: A New Sulfur and Carbon Degassing Inventory for the Southern Central American Volcanic Arc: The Importance of Accurate Time-Series Data Sets and Possible Tectonic Processes Responsible for Temporal Variations in Arc-Scale Volatile Emissions: New volatile budget for Central America, Geochem. Geophy. Geosy., 18, 4437-4468, https://doi.org/10.1002/2017GC007141, 2017.
Duffell, H. J., Oppenheimer, C., Pyle, D. M., Galle, B., McGonigle, A. J., and Burton, M. R.: Changes in gas composition prior to a minor explosive eruption at Masaya volcano, Nicaragua, J. Volcanol. Geoth. Res., 126, 327-339, https://doi.org/10.1016/S0377-0273(03)00156-2, 2003. [OpenAIRE]
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