Direct observations of nitric oxide produced by energetic electron precipitation into the Antarctic middle atmosphere

• Published in: Geophysical Research Letters
• Main Authors: Newnham, David A., Espy, Patrick J., Clilverd, Mark A., Rodger, Craig J., Seppälä, Annika, Maxfield, David J., Hartogh, Paul, Holmén, Kim, Horne, Richard B.
• Format: Article in Journal/Newspaper
• Language: English
• Published: American Geophysical Union 2011
• Subjects: Atmospheric Sciences; Antarctic; Sodankylä; The Antarctic; Troll; Troll Station; Antarc*; Antarctica
• Online Access: http://nora.nerc.ac.uk/id/eprint/15956/; https://nora.nerc.ac.uk/id/eprint/15956/1/grl28425.pdf; https://agupubs.onlinelibrary.wiley.com/doi/full/10.1029/2011GL048666

We report the first ground-based passive microwave observations made from Troll station, Antarctica, which show enhanced mesospheric nitric oxide (NO) volume mixing ratio reaching levels of 1.2 ppmv, or 2–3 orders of magnitude above background, at 70–80 km during small, relatively isolated geomagnet...