Hayley J. Duffell

TL;DR: In this article, open-path Fourier transform infrared spectroscopy (FTS) measurements show that the SO 2 /HCl molar ratio increased from 1.8 to 4.6 between April 2000 and April/May 2001.

TL;DR: In this paper, the authors reported new observations from Masaya Volcano, Nicaragua, which demonstrate that sulfate aerosol may also be emitted directly from volcanic vents, with the sulfate was present mainly in smaller particles, accounting for ≈80% of the mass.

TL;DR: In this article, the first field measurements of volcanic gases using mid-IR difference frequency laser spectroscopy were reported at the summit crater of Masaya volcano, Nicaragua, with the gases being drawn into a multi-pass cell and measured at reduced pressure.

TL;DR: In this article, the first measurements of volcanic gas fluxes obtained with a Sun-tracking Fourier transform infrared spectrometer were reported at Masaya volcano in Nicaragua, in 2000, and yields ratios and emission rates for five gases: H 2 O, CO 2, SO 2, HCl, and HF.

TL;DR: In this article, the authors investigated the effects on retrievals of the SO2 V1+v3 band (centered at 2499.87 cm−1) of varying the retrieval spectral window and background fit.