Replication data for : The little known Awu volcano is among the highest CO2 degassing source on earth

It is the northernmost active volcano of Sangihe arc with 18 eruptions in less than 4 centuries, causing a cumulative death toll of 11048. Two of these eruptions were classified as VEI 4.

Since 2004, a lava dome occupies the center of Awu crater, channeling the fumarolic gas output along the crater wall. A combined DOAS and MultiGAS measurements highlight a relatively small SO2 degassing (13 t/d) into the atmosphere. In contrast the measurements spotlight an elevated and non-negligible CO2 emission into the atmosphere of 2600 t/d, representing 1% of the global CO2 emission budget from volcanoes.