Total NRCRs in voxels with L of 0, 50, 100, and 150 km for the top part of 1D horizontal models (Tables C.1 and C.2). The temperature is given on the x-axis and the pressure is indicated by the symbols. Asterisks corresponds to 0.03 dyn cm⁻², diamonds to 0.05 dyn cm⁻², squares to 0.1 dyn cm⁻², triangles to 0.3 dyn cm⁻², crosses to 0.5 dyn cm⁻², and plus signs to 1.0 dyn cm⁻². The seemingly missing data points in the grey zones are lower than the plotted range and are mostly negative. Negative NRCR values correspond to radiative gains.