Published in Proceedings of the First Int. Conf on meteorology and air/sea interaction of the coastal zone, 10-12 Aug, pp 325-327 in 1982
H. M. van den Dool and G. P. Können
The time delay Δ between the warmest day in the mean annual curve and 21 June varies from 55 days over the coastal sea to 35 days in the inland of the Netherlands. Worldwide the lowest values is about 25 days for remote continental areas (Siberia). The delay seawater is about 60-65 days. The major variation is found in a coastal zone of 50 km lateral extend. The variation is understood by a simple model of periodic sinusoidal heating and Newtonial damping.