Study of an Extremely Strong Quasi‐20‐Sol Wave During a Global Dust Storm in Mars Year 34

Abstract Based on the temperature and dust opacity data from the Mars Reconnaissance Orbiter/Mars Climate Sounder and the OpenMars reanalysis, we report an extremely strong quasi‐20‐sol wave (Q20SW) during the global dust storm (GDS) in Mars Year (MY) 34. After the onset of the GDS in MY34, the amplitude of the Q20SW reaches approximately 12 K in temperature, which is the strongest from MY29 to MY35. By analyzing the Eliassen‐Palm fluxes of the Q20SW and their divergences, we conclude that the Q20SW is enhanced due to the unseasonal temperature increase caused by the GDS. Moreover, we find a strong eastward propagating oscillation with a period of 12–16 sols and a wavenumber of 1 exists in the dust opacity after the commencement of the GDS. This indicates that the strong Q20SW could also modulate the dust variation in the middle latitudes during the GDS.