Count me as wrong. One of the things I learned about weather is that the winter cold is largely an effect of surface heat radiating into the sky at night. The paper indicates that atmospheric circulation is enough to compensate for that and keep the dark side warm. Not a climatologist: but how do you explain the Earth’s poles then? One of the charts shows the dayside average at 300K and night at 250K. That second number is warmer than our Arctic in winter.