Figure 3From: Continuous in situ measurements of volcanic gases with a diode-laser-based spectrometer: CO2 and H2O concentration and soil degassing at Vulcano (Aeolian islands: Italy)Two examples of concentration measurement at different heigth from the ground, 0 cm (left), 40 cm (right), made at the PLB (Aug 25th 2004) and corresponding to acquisition PLB1 and PLB3 of Table 1.Back to article page