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Combined direct-sun ultraviolet and infrared spectroscopies at Popocatépetl volcano (Mexico)

Taquet, N.; Rivera Cárdenas, C.; Stremme, W.; Boulesteix, T.; Bezanilla, A.; Grutter, M.; García, O.; Hase, F. 1; Blumenstock, T. ORCID iD icon 1
1 Institut für Meteorologie und Klimaforschung – Atmosphärische Spurenstoffe und Fernerkundung (IMK-ASF), Karlsruher Institut für Technologie (KIT)


Volcanic plume composition is strongly influenced by both changes in magmatic systems and plume-atmosphere interactions. Understanding the degassing mechanisms controlling the type of volcanic activity implies deciphering the contributions of magmatic gases reaching the surface and their posterior chemical transformations in contact with the atmosphere. Remote sensing techniques based on direct solar absorption spectroscopy provide valuable information about most of the emitted magmatic gases but also on gas species formed and converted within the plumes. In this study, we explore the procedures, performances and benefits of combining two direct solar absorption techniques, high resolution Fourier Transform Infrared Spectroscopy (FTIR) and Ultraviolet Differential Optical Absorption Spectroscopy (UV-DOAS), to observe the composition changes in the Popocatépetl’s plume with high temporal resolution. The SO2 vertical columns obtained from three instruments (DOAS, high resolution FTIR and Pandora) were found similar (median difference <12%) after their intercalibration. We combined them to determine with high temporal resolution the different hydrogen halide and halogen species to sulfur ratios (HF/SO$_{2}$, BrO/SO$_{2}$, HCl/SO$_{2}$, SiF$_{4}$/SO$_{2}$, detection limit of HBr/SO$_{2}$) and HCl/BrO in the Popocatépetl’s plume over a 2.5-years period (2017 to mid-2019). ... mehr

Verlagsausgabe §
DOI: 10.5445/IR/1000158477
Veröffentlicht am 10.05.2023
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Meteorologie und Klimaforschung – Atmosphärische Spurenstoffe und Fernerkundung (IMK-ASF)
Publikationstyp Zeitschriftenaufsatz
Publikationsjahr 2023
Sprache Englisch
Identifikator ISSN: 2296-6463
KITopen-ID: 1000158477
HGF-Programm 12.11.13 (POF IV, LK 01) Long-term trends of global atmospheric composition
Erschienen in Frontiers in Earth Science
Verlag Frontiers Media SA
Band 11
Seiten Art.-Nr.: 1062699
Vorab online veröffentlicht am 06.04.2023
Nachgewiesen in Scopus
Web of Science
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