CEDAR Workshop, Santa Fe, NM
On June 23, 1995, a noctilucent cloud (NLC) was detected with the Rayleigh-scatter lidar at the Atmospheric Lidar Observatory (ALO) on the campus of Utah State University (USU) located in Logan, UT (41.7° N 111.8° W). This observation preceded, by four years, the one from 1999 that was previously reported [Wickwar et al., 2002]. These are both important because of their occurrence significantly equatorward of 50° latitude. The NLC was observed for 45 minutes shortly after local midnight. This was well past the twilight period when NLCs are visible to the naked eye. Several parameters of the NLC were measured by the lidar and are similar to those from the NLC observations in 1999. This NLC was approximately 1.5 km higher. Temperatures were measured in the surrounding region and, because of wave activity, were found to be significantly cooler than the climatological mean.
Herron, J., & Wickwar, V. (2004, June 27). Another Noctilucent Cloud at 41.7oN. Presented at the CEDAR Workshop, Santa Fe, NM.