The “wave turbopause”

Details The “wave turbopause” The “wave turbopause”

Dec 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007jastp..69.2139o&link_type=abstract

Journal of Atmospheric and Solar-Terrestrial Physics, Volume 69, Issue 17-18, p. 2139-2158.

Physics

9

Scientific paper

The “wave turbopause” is defined as the mesospheric altitude level where the temperature fluctuation field indicates a substantial increase in wave amplitudes in the vertical direction. The turbopause altitude is analyzed on the basis of four years of SABER data (2002 2005, Version 1.06). Substantial seasonal and latitudinal variations are found, with some interannual variability also present. Seasonal changes are annual at high latitudes, semi-annual at low latitudes, and a mixture of both at middle latitudes. Southern hemisphere data are similar as in the North if shifted by half a year. Latitudinal variations show a minimum in the tropics and two relative maxima at middle latitudes. The “wave turbopause” is found near to zero-wind lines or low-wind zones (zonal wind). It is compared to rocket and other measurements, and interesting similarities are obtained. The wave turbopause can also be found in the HAMMONIA GCM. A preliminary analysis shows results similar to those of the SABER measurements.

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