The upper left panel presents the infrared CO₂ stretching features at specific temperatures during the warm-up of 18 ML of a H₂O:CO₂ 5:1 ice heated at 1 K.min^-1. The right upper panel presents the desorption rate of CO₂ for the same experiment obtained by mass spectrometry. The bottom panel shows the ice loss for this experiment obtained by infrared measurements (crosses) and mass spectrometry (solid line).