STUDY OF TEMPERATURE PROFILES OBSERVED DURING AN UNUSUAL DEPLETION OF OZONE OVER NDACC STATION OF RÍO GALLEGOS (51° 55?S, 69° 14?W) - ARGENTINA ON NOVEMBER 2009

JACOBO SALVADOR; ELIAN WOLFRAM; FACUNDO ORTE; RAUL D'ELIA; DANIELA BULNES; SOPHIE GODIN-BEEKMANN; EDUARDO QUEL

Queenston

Congreso; Stratosphere-troposphere Processes And their Role in Climate (SPARC); 2014

Since June 2005, the CEILAP group with the support of JICA Japan International Cooperation Agency (JICA) and cooperation with French and Japanese researches has carried out systematic measurements of ozone profile and UV radiation in the southern part of Argentina (51° 55?S, 69° 14?W) using a Differential Absorption lidar (DIAL), this place has been called Atmospheric Observatory of Southern Patagonia (OAPA). After 2006 other products were retrieved in addition to the ozone profiles from the DIAL measurements, such as stratospheric aerosols and temperature profiles using the off-wavelength signal at 355 nm. As a part the systematic observations at southern continent using stratospheric Rayleigh Lidar we have detected an unusual temperature profiles on November 2009 where a depletion of the ozone number density in the southern hemisphere was detected (de Laat et al., 2010). We present the comparison of these profiles measured during November 13-14, 2009. They have been compared with the NCEP mean profiles in Río Gallegos for the period 2005-2011. We have found a warming in the upper stratosphere with a temperature anomaly of 25 K around 36 km when the temperature was compared with the NCEP mean profile. We present in this work complementary analysis from models and satellite instruments to improve the analysis.