10:45 AM - 12:15 PM
[PEM12-P08] Lower-thermospheric circulation during the geomagnetically storm times
Keywords:Residual Circulation, Geomagnetically Storm , CO2
During geomagnetically active times, our model analysis suggests that pressure gradients due to the enhanced Joule heating and the enhanced ion drag induce clockwise and counterclockwise circulations between 105 km and 140 km in the Southern and Northern polar region, respectively. Dynamical tracers, such as CO2 from SABER, are also employed in this work to validate the dynamics simulated by SD-WACCMX. Our results indicate vertical advection associated with the altered circulation patten can effectively transport CO2 into the thermosphere, which qualitatively agrees with observations. This mechanism acts as an efficient way to mix the atmosphere, which also impact the vertical distribution of atomic oxygen during the storm times.