Towards a Better Knowledge of Natural Methane Releases in the French Alps: A Field Approach

Figure 3

Meteorological parameters before and during the survey. (a) Daily mean air temperatures and rainfall amounts taken at the nearest airport weather stations (data from https://freemeteo.fr); distance between gas seeps and airports is indicated in the caption. (b) Hourly pressure and temperature data from Geneva (Genève) airport compared to temperature and pressure data measured using the flux chamber system during the measurements. Bar chart gives the relative humidity inside the chamber during the measurements.

(a)

(b)