[P-EM12] Coupling Processes in the Atmosphere-Ionosphere System

[PEM12-21] Vertical and Latitudinal Coupling of Secondary Ozone Concentrations During Particle Precipitation

★Invited Papers

Jia jia¹, Lise Eider Murberg², Tiril Løvset⁷, *Patrick J Espy¹, Yvan J Orsolini², Lilou G.G. Zeller³, Cornelius Csar Jude H. Salinas⁵, Jae N Lee⁴, Dong L. Wu⁴, Jiarong Zhang⁶ (1.Norwegian Univ. of Science and Technology, 2.Norwegian Inst. for Air Research, 3.ENSTA-Paris, 4.NASA GSFC, 5.Univ. of Maryland, 6.Clemson Univ., 7.Univ. of Bergen)

Keywords:Secondary Ozone, Particle Precipitation, Circulation

The secondary ozone layer is a global peak in ozone abundance in the upper mesosphere-lower thermosphere (UMLT) around 90-95 km. The effect of energetic particle precipitation (EPP) from geomagnetic processes on this UMLT ozone has not been well studied. Here we examine the secondary ozone response to EPP using the Microwave Limb Sounder (MLS) and the Sounding of the Atmosphere using Broadband Emission Radiometry (SABER) instrument on the Aura and TIMED satellites, respectively. Due to the dominance of ozone destruction by hydrogen in this region, EPP produced HOx and NOx have minimal effect. Thus, we have used the Whole Atmosphere Community Climate Model with thermosphere and ionosphere extension and specified dynamics (SD-WACCM-X) to characterise the residual circulation during EPP events and its effect on the reagents controlling ozone concentrations. By comparing ozone and circulation changes under High- and Low-Ap conditions, we report regions of secondary ozone enhancement or deficit across low, mid, and high latitudes as a result of circulation and transport changes induced by EPP.