Аннотация:This paper aims at the theoretical study of the CO2 magnetic-dipole ν2 + ν3 rovibrational absorption band that was recently detected in theMartian atmosphere. Specific characteristics of the magnetic dipole operator are carefully examined. Our evaluation of the magnetic-dipoleline intensities is based on the variational calculations and the use of molecular properties is determined through specially performed ab initioquantum chemical calculations. The comparison of our simulated magnetic-dipole spectrum with available laboratory taken data also requiresthe knowledge of line intensities in the quadrupole band, which partially overlaps with that magnetic-dipole. Quadrupole intensities, oncereconsidered, are permitted to correct previously reported values of the integrated intensity as well as the intensity of selected branches.The sum of our calculated magnetic-dipole and quadrupole rovibrational lines is shown to be in good agreement with both sets of presentlyavailable data from FTIR and OFCEAS laboratory observations.