It is necessary to include preexisting stratospheric HNO3 in an analysis of nitrate deposition from SPEs
SPE-produced nitrate is negligible compared to the stratospheric background
Earth Systems Research Center
Journal of Geophysical Research: Atmospheres
American Geophysical Union (AGU)
Digital Object Identifier (DOI)
Duderstadt, K. A., J. E. Dibb, C. H. Jackman, C. E. Randall, N. A. Schwadron, S. C. Solomon, and H. E. Spence (2016), Comment on “Atmospheric ionization by high-fluence, hard spectrum solar proton events and their probable appearance in the ice core archive” by A. L. Melott et al. , Journal of Geophysical Research, 121, 12484-12489, https://dx.doi.org/10.1002/2016JD025220
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