Climatic effects of land reclamation in Tokyo bay — numerical experiment

Abstract

To investigate the climatic effects of land reclamation in Tokyo Bay, numerical experiments were carried out under typical summer and winter synoptic conditions. The model is based upon the three-dimensional Boussinesq equations with the hydrostatic assumption. Since land-use is different for every subdivision in Tokyo, the model includes a sub-grid parameterization scheme which can calculate heat budget on the mixture surface of various surface conditions.Diurnal variations of the simulated surface temperature in typical summer conditions without the land reclamation agree well with observed ones averaged over about 30 days each which have been chosen from six years for typical summer and winter days.The model predicts that the surface temperature at midnight on a typical winter day in the central part of Tokyo will increase by about 1.5 K after reclamation of the northern half of the Bay.