Michel Cure
Universidad de Valparaíso, Chile
 

"Astro-Meteorological Study on Gemini South"
 

In recent years the interrelationship between meteorology and astronomy has become more dependent because of the presence of atmospheric turbulence hurts the image quality obtained and moreover the study of atmospheric conditions allow for selecting new sites construction of the new generation of large telescopes. For these reasons access to weather information on-line and prediction of future atmospheric states are becoming a necessity for observatories. Under the frame of the project Gemini-CONICYT "Implementation of meteorological forecast tool for Gemini South", we present here a study of the synoptic predominant conditions in the episodes of "good" and "bad" seeing registered in Gemini South for the year 2005.

First we show the results from a statistical study, classify episodes of "bad" and "good" seeing. We also show numerical weather simulations with the system of MM5 modeling and contrasted with satellite images in infrared channels and water vapor for the seeing episodes. The results show that 50% of cases of bad seeing were dominated by Height Trough (HT), weather condition occurs in middle levels of the atmosphere. Also for the other cases were found episodes of Jet Stream (JS), Cut-off-Low (CL) and Frontal System (FS) as generators of atmospheric instability. In the case of good seeing it was found that the Prevalence Anticyclonic (PA) was present in these episodes.

Finally we show the our on-line web page with the result of the global forecast and the first results of the Kalman Filter for reduce the model's systematic errors.