Sulfur Degassing From Steam-Heated Crater Lakes: El Chichón (Chiapas, Mexico) and Víti (Iceland)

Alessandro Aiuppa, Nathalie Hasselle, Melissa Pfeffer, Giudice, Rouwet, Robin Campion, Jácome-Paz, Marcello Bitetto, Baldur Bergsson, Aiuppa, Taran

Risultato della ricerca: Articlepeer review

4 Citazioni (Scopus)


The composition of the gases released by El Chichón (Chiapas, Mexico) and Víti (Askja volcano, Iceland) volcanic lakes is examined by Multi-GAS for the first time. Our results demonstrate that H2S and SO2 are degassed by these pH 2–3 lakes. We find higher CO2/H2S and H2/H2S ratios in the lakes' emissions (31–5,685 and 0.6–35, respectively) than in the fumarolic gases feeding the lakes (13–33 and 0.08–0.5, respectively), evidencing that only a fraction (0.2–5.4% at El Chichón) of the H2S(g) contributed by the subaquatic fumaroles ultimately reaches the atmosphere. At El Chichón, we estimate a H2S output from the crater lake of 0.02–0.06 t/day. Curiously, SO2 is also detected at trace levels in the gases released from both lakes (0.003–0.3 ppmv). We propose that H2S supplied into the lakes initiates a series of complex oxidation reactions, having sulfite as an intermediate product, and ultimately leading to SO2 production and degassing.
Lingua originaleEnglish
pagine (da-a)7504-7513
Numero di pagine10
RivistaGeophysical Research Letters
Stato di pubblicazionePublished - 2018

All Science Journal Classification (ASJC) codes

  • ???subjectarea.asjc.1900.1908???
  • ???subjectarea.asjc.1900.1900???


Entra nei temi di ricerca di 'Sulfur Degassing From Steam-Heated Crater Lakes: El Chichón (Chiapas, Mexico) and Víti (Iceland)'. Insieme formano una fingerprint unica.

Cita questo