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We present the first routine measurements of emissions (CO 2 , SO 2 , and H 2 S) from Ruapehu volcano, New Zealand during a crater lake heating cycle. Emissions were generally at a low level consistent with quiescent degassing of the volcano and the presence of a crater lake. Maximum concentrations (∼ 3–4 km downwind) during the highest measurement in May, 2004 were 14 ppm,...
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