AUTHOR=Seppälä Annika , Clilverd Mark A. TITLE=Response: Commentary: Energetic particle forcing of the Northern Hemisphere winter stratosphere: comparison to solar irradiance forcing JOURNAL=Frontiers in Physics VOLUME=3 YEAR=2015 URL=https://www.frontiersin.org/journals/physics/articles/10.3389/fphy.2015.00069 DOI=10.3389/fphy.2015.00069 ISSN=2296-424X