Sulfur dioxide emissions from Papandayan and Bromo, two Indonesian volcanoes

P. Bani, M. Hendrasto, H. Gunawan, S. Primulyana
2013 Natural Hazards and Earth System Sciences  
<p><strong>Abstract.</strong> Indonesia hosts 79 active volcanoes, representing 14% of all active volcanoes worldwide. However, little is known about their SO<sub>2</sub> contribution into the atmosphere, due to isolation and access difficulties. Existing SO<sub>2</sub> emission budgets for the Indonesian archipelago are based on extrapolations and inferences as there is a considerable lack of field assessments of degassing. Here, we present the first SO<sub>2</sub> flux measurements using
more » ... urements using differential optical absorption spectroscopy (DOAS) for Papandayan and Bromo, two of the most active volcanoes in Indonesia. Results indicate mean SO<sub>2</sub> emission rates of 1.4 t d<sup>−1</sup> from the fumarolic activity of Papandayan and more than 22–32 t d<sup>−1</sup> of SO<sub>2</sub> released by Bromo during a declining eruptive phase. These DOAS results are very encouraging and pave the way for a better evaluation of Indonesian volcanic emissions.</p>
doi:10.5194/nhess-13-2399-2013 fatcat:bfkb3bwzijejlm4v43xlrdtjwa