Based on simultaneous observations of Na density, polar mesosphere summer echoes (PMSE) and noctilucent cloud (NLC) at ALOMAR, Norway (69°N) during the summers of 2001 and 2002, we report the strong anti-correlation of sodium atoms with NLC, suggesting that in the presence of large ice particles Na is always absent, and a weaker anti-correlation of sodium atoms with PMSE, suggesting that a population of sub-visible particles also deplete Na to a varied degree. This conclusion is in general agreement with recent reports on iron and potassium atom-ice particle anti-correlation. For this study, we use data taken with the Weber Na lidar, the ALWIN VHF radar, and the RMR lidar on 8 specific days in 2001 and 4 days in 2002 plus half-monthly average variation over the summer 2001 based on all 17 days of coincident measurements. © 2005 Elsevier Ltd. All rights reserved.
CITATION STYLE
She, C. Y., Williams, B. P., Hoffmann, P., Latteck, R., Baumgarten, G., Vance, J. D., … Lübken, F. J. (2006). Simultaneous observation of sodium atoms, NLC and PMSE in the summer mesopause region above ALOMAR, Norway (69°N, 12°E). Journal of Atmospheric and Solar-Terrestrial Physics, 68(1), 93–101. https://doi.org/10.1016/j.jastp.2005.08.014
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