Diurnal variation in subsurface temperature in the radiative icy nucleus. The results are for the same locations on 67P and thesame dates as in Fig. 5. Results are obtained for the heliocentric distances of 3.27 au (panels a and b) and 1.35 au (panels c and d). The nucleus is assumed to consist of an icy interior overlaid by a dry dust mantle of 5 mm in thickness. The icy area fraction is 10%. Panels a and c show the temperature distribution in a conductive nucleus, andpanels b and d correspond to a radiative nucleus consisting of aggregates with 0.5 mm radius.