The ALO is a new facility developed for atmospheric research, located at the foot of the Andes mountain range in Cerro Pachon, Chile (30.2°S, 70.7°W). As part of a collaborative program, Utah State has a Mesospheric Temperature Mapper (MTM) on site, which is used to study short period gravity wave dynamics and temperature variations in the mesosphere-lower thermosphere region. The MTM began taking measurements of the OH(6,2) and O2(0,1) spectral bands in August 2009 and a complete profile of seasonal variation in gravity wave characteristics has been created for August 2009 through August 2010 using the OH(6,2) Band. The primary goal of this program is to

Quantify seasonal variability of gravity wave structures.

Compare and contrast seasonal directionality and characteristic variability with results from the Maui-MALT oceanic site.

Quantify mountain wave observations, their frequency, images, characteristics and seasonal variability.

Seasonal variability for gravity wave structures at this site is shown. New evidence for a number of mountain wave events has been observed during the winter months. Future work includes investigating yearly repeatability, which is seen at other sites, and continued investigation of unique events occurring over the Andes mountain range.