%0 Journal Article
%9 ACL : Articles dans des revues avec comité de lecture répertoriées par l'AERES
%A Bani, Philipson
%A Oppenheimer, C.
%A Tsanev, V.
%A Scaillet, B.
%A Primulyana, S.
%A Saing, U. B.
%A Alfianti, H.
%A Marlia, M.
%T Modest volcanic SO2 emissions from the Indonesian archipelago
%D 2022
%L fdi:010085286
%G ENG
%J Nature Communications
%K INDONESIE
%M ISI:000809574500007
%N 1
%P 3366 [15 ]
%R 10.1038/s41467-022-31043-7
%U https://www.documentation.ird.fr/hor/fdi:010085286
%> https://www.documentation.ird.fr/intranet/publi/2022-09/010085286.pdf
%V 13
%W Horizon (IRD)
%X Indonesia is the country with the most active volcanoes, several of which are renowned for climate-changing eruptions. Here the authors show a rather moderate sulfur emissions budget and reinforce the idea that sulfur-rich eruptions reflect long-term accumulation of volatiles in the reservoirs. Indonesia hosts the largest number of active volcanoes, several of which are renowned for climate-changing historical eruptions. This pedigree might suggest a substantial fraction of global volcanic sulfur emissions from Indonesia and are intrinsically driven by sulfur-rich magmas. However, a paucity of observations has hampered evaluation of these points-many volcanoes have hitherto not been subject to emissions measurements. Here we report new gas measurements from Indonesian volcanoes. The combined SO2 output amounts to 1.15 +/- 0.48 Tg/yr. We estimate an additional time-averaged SO2 yield of 0.12-0.54 Tg/yr for explosive eruptions, indicating a total SO2 inventory of 1.27-1.69 Tg/yr for Indonesian. This is comparatively modest-individual volcanoes such as Etna have sustained higher fluxes. To understand this paradox, we compare the geodynamic, petrologic, magma dynamical and shallow magmatic-hydrothermal processes that influence the sulfur transfer to the atmosphere. Results reinforce the idea that sulfur-rich eruptions reflect long-term accumulation of volatiles in the reservoirs.
%$ 066 ; 021