Publication Date:
2023-01-16
Description:
With this short communication we address the principal issues raised by Delmelle et al. (2014) in relation to the work of
Bagnato et al. (2013) concerning the 2010 eruption of Eyjafjallajo¨ kull, Iceland. The principal conclusions of the work of Bagnato
et al. (2013) include the observation that protracted gas-aerosol interaction in the plume promotes selective leaching of
cation species from ash, with alkalis and Ca (and, among trace elements, Zn and Cu) being more rapidly re-mobilized (and
transferred to soluble surface salts) relative to more inert elements (Mg, Ti). They also observed that adsorption onto ash
surfaces is a major atmospheric sink of volcanic acidic gases, with 282 tons of elemental sulfur and 605–691 tons of halogens
being daily ground deposited via ash over Iceland in early May 2010. Acidic gas adsorption onto ash increases almost linearly
with plume aging (e.g., upon increasing in-plume residence times of ash and gases), and is seen to proceed at about 3 time
faster rates for HF than for SO2 and HCl. However, Delmelle et al. (2014) criticized our strategies for data acquisition, processing
and interpretation. They also raised some objections concerning several key topics explored by Bagnato et al. (2013),
with a special focus on the discussion of rates of interaction between ash particles and gases in a volcanic cloud, and the consequent
formation of soluble salts on ash surfaces. They also considered incorrect the estimate of depositional fluxes and volatile
budget for the Eyjafjallajo¨ kull eruption. While we appreciate the in-depth analysis of Delmelle et al. (2014), we show that
most of their criticisms derive from a partial and sometimes incorrect understanding of the work of Bagnato et al. (2013),
which overall led to unsupported conclusions and misleading analysis of the original results. Here, we present a detailed
response to the comments of Delmelle et al. (2014), accompanied by additional explicative material. The principal conclusions
presented in Bagnato et al. (2013) are given additional support by this complementary note.
Description:
Published
Description:
385-389
Description:
5V. Sorveglianza vulcanica ed emergenze
Description:
JCR Journal
Description:
restricted
Keywords:
Eyjafjallajokull
;
sulfur, halogens and trace metals
;
04. Solid Earth::04.08. Volcanology::04.08.01. Gases
Repository Name:
Istituto Nazionale di Geofisica e Vulcanologia (INGV)
Type:
article
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