Martian Atmospheric Thermal Structure and Dust Distribution During the MY 34 Global Dust Storm From ACS TIRVIM Nadir Observations

Abstract The Thermal InfraRed channel in honor of professor Vassili Ivanovich Moroz (TIRVIM) the Atmospheric Chemistry Suite onboard ExoMars Trace Gas Orbiter has continuously monitored Martian atmosphere from 13 March 2018 until 2 December 2019, covering almost a complete Year (MY). In nadir mode observations, infrared spectra obtained by TIRVIM spectral range 600–1,300 cm −1 permit retrievals vertical temperature profiles surface up to 60 km altitude, temperatures and column aerosol optical depths. Here we report retrieved atmospheric thermal structure dust content during global storm (GDS) MY 34 L s = 182.2° 211.8° (Solar Longitude), capturing evolution GDS response changing loading. caused asymmetric heating, predominantly southern hemisphere, changed diurnal contrast structure. We also observe reduced at peak GDS.