An explanation of discrepancy in mesospheric temperature trends derived from ground-based LF phase-height observations

Details An explanation of discrepancy in mesospheric temperature trends derived from ground-based LF phase-height observations An explanation of discrepancy in mesospheric temperature trends derived from ground-based LF phase-height observations

Dec 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004jastp..66.1727l&link_type=abstract

Journal of Atmospheric and Solar-Terrestrial Physics, Volume 66, Issue 18, p. 1727-1730.

Physics

Mesosphere, Long-Term Trends, Lf Phase Heights, Temperature

Scientific paper

Bremer and Berger (J. Atmos. Solar Terr. Phys. 64 (2002) 805) applied a correction for trends in the NO concentration and αeff in the interpretation of trends in the low frequency (LF) phase height measurements and obtained results less consistent with model simulations as well as the observed trends in mesospheric temperatures. The correction is shown to be too large most probably due to the application of inappropriate trends in αeff of Chakrabarty (Adv. Space Res. 20 (1997) 2117), which yield a trend in electron density opposite to that which is observed. The discrepancy between the observational data and model-simulated trends of Bremer and Berger (J. Atoms. Solar. Terr. Phys. 64 (2002) 805) in the LF phase heights can be largely removed. Even more important, the trends in mesospheric temperatures inferred by Bremer and Berger (J. Atmos. Solar Terr. Phys. 64 (2002) 805) from trends in the LF phase heights without the inappropriate correction agree well with the results of analysis of a global set of results on trends in the mesospheric temperatures by Beig et al. (Rev. Geophys. 41 (2003) 1015).

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