2021
DOI: 10.5194/acp-2021-737
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Exceptional middle latitude electron precipitation detected by balloon observations: implications for atmospheric composition

Abstract: Abstract. Energetic particle precipitation leads to ionization in the Earth's atmosphere, initiating the formation of active chemical species which destroy ozone and have the potential to impact atmospheric composition and dynamics down to the troposphere. We report on one exceptionally strong high-energy electron precipitation event detected by balloon measurements in middle latitudes on 14 December 2009 with ionization rates locally comparable to strong solar proton events. This electron precipitation was li… Show more

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“…The outer radiation belt can relax to its more quiescent state on timescales ranging from minutes (Turner et al, 2013) to many days (Baker, 2019) following a significant geomagnetic storm. It should be noted, in conclusion, that although the evidence provided herein shows a clear association of magnetic storms with enhanced levels of electron precipitation, it is likely that even during geomagnetically quiet intervals electron precipitation persists but apparently at a greatly reduced rate (Mironova et al, 2021).…”
Section: Introductionmentioning
confidence: 48%
“…The outer radiation belt can relax to its more quiescent state on timescales ranging from minutes (Turner et al, 2013) to many days (Baker, 2019) following a significant geomagnetic storm. It should be noted, in conclusion, that although the evidence provided herein shows a clear association of magnetic storms with enhanced levels of electron precipitation, it is likely that even during geomagnetically quiet intervals electron precipitation persists but apparently at a greatly reduced rate (Mironova et al, 2021).…”
Section: Introductionmentioning
confidence: 48%