Geochemistry of atmospheric aerosols generated from lava-seawater interactions, Geophys

[4] On the day of sample collection (16 July 2000) lava tubes released lava into the surface ocean either at the steep edge of the shoreline lava bench or underwater with little contact with the atmosphere before water contact. The resulting boiling of seawater produced a visible atmospheric aerosol plume that was transported parallel to the coastline by the winds on that day. Subaerial volcanic inputs to the aerosol plume were minimized by both the wind direction and the small amount of subaerial lava extrusion along the shoreline. [5] Plume aerosols were sampled using an active mesh collector (impactor) consisting ofan air pump that pulled 151 L min-I of air through 0.18 m2 of tightly folded plastic screen (0.5 mm opening) located in the top of a 4-L wide mouth polyethylene bottle. The collector was suspended below a Hughes 500D helicopter using 60 m of synthetic fiber rope; aerosol entered through four I-c