Stratospheric Temperature and Ozone Long-term trends in the South Atlantic Anomaly

BRUNO S. ZOSSI; ANA G. ELIAS; MARTA M. ZOSSI

Hefei

Workshop; 10th IAGA/ICMA/CAWSES Workshop on Long-Term Changes and Trends in the Atmosphere; 2018

IAGA/ICMA/CAWSES

In recent decades, the global decline in ozone and rising CO2 levels have driven stratospheric cooling, with a magnitude that peaked near the stratopause. Cooling due to CO2 dominates in the mid-stratosphere and cooling due to ozone dominates in the lower stratosphere. The South Atlantic Anomaly (SAA), where the total field intensity is low, presently occupies the area between South America and the South Atlantic Ocean. The low magnetic field in this zone facilitates the entrance of high energy particles from the magnetosphere which may affect ozone content and temperature, possibly modifying the expected trends. In order to study this effect, ozone content and temperature in different layers of the low and middle stratosphere in the SAA area analyzed covering the period 1980-2016.