Variability of Temperature and Ozone in the Troposphere and low-middle stratosphere during intense geomagnetic storms in the Antarctic Peninsula

GULISANO A.M.; LOPEZ, V.; DASSO, S.

Conferencia; CONGREMET 2018; 2018

Geomagnetic storms are caused by solar and interplanetary events that generate disturbances in various regions of the terrestrial space environment; these events can last hours or days. Magnetospheric substorms are episodes of transport and dissipation of energy in the ionosphere and the magnetosphere, in time lapses of the order of 10 minutes to 3 hours, and are much more frequent than geomagnetic storms.The aim of this work is to study the variability of temperature and ozone partial pressure profiles in the lower-middle stratosphere of the Antarctic region during severe Space Weather events. Vertical profiles of these atmospheric parameters are analyzed at the Marambio station (-64.2°S, -56.6°W), among solar cycles 23 and 24 (1998-2018). The data are obtained by ozone-sounding balloons, and are provided by the National Meteorological Service of Argentina and the Meteorological Institute of Finland.The spatial and temporal variation of the studied quantities in the stratospheric region is quantified during periods of intense and moderate storms and substorms, defined from the Dst geomagnetic index, which provides a measure of the intensity of the energy contained in the ring current, and the index AE, useful for the analysis of individual substorms, which quantitatively measures the auroral magnetic activity.The results of this study will be useful to better understand the possible impact of Space Weather events on the Antarctic atmosphere.