Variation with height of the atmospheric parameters across different optical depths in the solar atmosphere. Columns represent three optical depths, from left to right, log τ = [0, −2, −4]. Rows display, from top to bottom, the temperature, LOS velocity, magnetic field strength, and inclination. The dashed line highlights a region crossing the flare ribbon, which we study later. We also added, as a reference, a contour line representing the area of temperature enhancement at log τ = −4 in the panels of the rest of the atmospheric parameters at the same optical depth.