Extended Data Fig. 3: Atmospheric transmittances measured by NOMAD during the storm.
From: Martian dust storm impact on atmospheric H2O and D/H observed by ExoMars Trace Gas Orbiter

Data obtained at Ls = 196.64°, latitude 51° N and longitude 148° E, showing HDO absorption features (arrows) appearing at tangent heights of up to 50 km; most of the other absorption features originate from CO2. The transmittances have been normalized by the continuum defined by a fifth-order polynomial applied to eliminate aerosol extinction and instrument effects. The transmittances are plotted with an interval of 0.015 to avoid overlapping.