A comparison of the morphology of instability features seen at the Andes Lidar Observatory with those observed over Maui

Details A comparison of the morphology of instability features seen at the Andes Lidar Observatory with those observed over Maui A comparison of the morphology of instability features seen at the Andes Lidar Observatory with those observed over Maui

Dec 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011agufmsa23b..02h&link_type=abstract

American Geophysical Union, Fall Meeting 2011, abstract #SA23B-02

Other

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

Scientific paper

The Aerospace near-IR (ANI) camera images at night OH emission (near 1.6 microns) every 2 seconds over an approximate 73 degree field of view. Data from ANI have previously been used to investigate the properties of small-scale instability features in the upper mesosphere/lower thermosphere over Mt Haleakala in Maui. These features are thought to be mostly due to the presence of large wind-shears (producing a Kelvin-Helmholtz instability) or super adiabatic lapse rates (producing a Rayleigh-Taylor instability). In late 2009 the camera was moved to the new Andes Lidar Observatory at Cerro Pachon, Chile where it is co-located with a number of other instruments including a Meteor Radar. The initial data have revealed a significant difference in the lifecycle of the instability features between those observed over an essentially open ocean site in Maui and those observed over a mountainous region of Chile. In particular the instability features decay much more rapidly over Chile than over Maui. A survey of the results obtained to date will be presented including the background wind characteristics for selected events.

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