Interpretation of high-resolution spectra of Mars: IV. New calculations of the CO abundance

New data for carbon monoxide linewidths, pressure broadened by carbon dioxide at a temperature of 200°K, have been published since we wrote paper III of this series. The new data makes it possible to improve the accuracy of our previous estimate for the amount of CO in the atmosphere of Mars, based on the 2-0 band of CO. We now find 19.5±1.7 cm-atm_stp of carbon monoxide in the total path for Martian surface pressures in the range of 5 to 6 mb. These results are now in agreement with those obtained from the 3-0 band of CO.