Enhancement of the volcanogenic "bromine explosion" via reactive nitrogen chemistry (Kīlauea volcano, Hawai'i)

G. G. Salerno, C. Oppenheimer, V. I. Tsanev, A. J. Sutton, T. J. Roberts, T. Elias
2010 Atmospheric Chemistry and Physics Discussions  
Since the first detection of bromine monoxide in volcanic plumes attention has focused on the atmospheric synthesis and impact of volcanogenic reactive halogens. We report here new measurements of BrO in the volcanic plume emitted from Kīlauea volcano -the first time reactive halogens have been observed in emissions from a 5 hotspot volcano. Observations were carried out by ground-based Differential Optical Absorption Spectroscopy in 2007 and 2008 at Pu'u'Ō'ō crater, and at the 2008 magmatic
more » ... he 2008 magmatic vent that opened within Halema'uma'u crater. BrO was readily detected in the Halema'uma'u plume (average column amount of 3×10 15 molec cm −2 ) and its abundance was strongly correlated with that of SO 2 . However, anticorrelation between NO 2 Abstract of BrO in this autocatalytic cycle (see Roberts et al., 2009) . In this way, the presence of 10322 Abstract 25 their assistance and support in the field, especially J. Kauahikaua and M. Patrick. C. Werner and M. Boichu provided further field support. We are grateful to M. Burton, L. Spampinato, N. Browboski, and A. La Spina, for fruitful discussions, and to C. Fayt and M. van Roozendeal (I.S.A.B.) for providing the WinDoas software and for further discussions. We thank S. Calvari
doi:10.5194/acpd-10-10313-2010 fatcat:eultt2gqpzcxzez2ykoo2n6u2e