Investigating Seasonal Oscillations in Mesospheric Temperatures at Low and Mid-latitudes

Details Investigating Seasonal Oscillations in Mesospheric Temperatures at Low and Mid-latitudes Investigating Seasonal Oscillations in Mesospheric Temperatures at Low and Mid-latitudes

Dec 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011agufmsa51b1932z&link_type=abstract

American Geophysical Union, Fall Meeting 2011, abstract #SA51B-1932

Other

[0310] Atmospheric Composition And Structure / Airglow And Aurora, [3332] Atmospheric Processes / Mesospheric Dynamics, [3334] Atmospheric Processes / Middle Atmosphere Dynamics

Scientific paper

The Andes Lidar Observatory (ALO) is a new upper atmospheric observatory located high in the Andes mountains at Cerro Pachón, Chile (30.3°S, 70.7°W, 2530 m). The Utah State University (USU) Mesospheric Temperature Mapper (MTM) was deployed in August, 2009 collocated with a Na wind/temperature lidar and meteor wind radar from University of Illinois at Urbana-Champaign (UIUC) and other optical instrumentation. Two years of high quality nocturnal OH (6, 2) and O2 (0, 1) band temperature and intensity data (centered at ~87 and 94 km, respectively) have now been obtained, enabling the first seasonal study from this southern hemispheric mountain site. In this presentation, we focus on the characteristics of the annual, semi-annual and other shorter term seasonal variability that we have identified in the temperature field (primary using the OH data) over the Andes, including their signatures in coincident radar wind data (same location) and additional mesospheric temperature data from nearby El Leoncito observatory (31.8°S, 69.3°W), Argentina. These results are compared with an earlier long-term study (2000-2005) using the MTM at Haleakala, Maui (20°N), as part of very successful Maui-MALT program.

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