A simulation of climatic change induced by land use modification from 1976 to 2006 on summer over Tokyo metropolitan area, Japan
From the differential of two cases, the monthly mean temperature rise at around the center of Tokyo (Tokyo's 23 wards) and along with some trunk railways, where the land use changed notably from vegetation (such as paddy rice fields and forests) to urban surfaces, is calculated over 1.3 °C to the maximum. On the other hand, the temperature rise of less than 1 °C could be seen at the center of Tokyo though the land use fractions of urban area didn't change in 30 years. As for the temperature rise in the center of Tokyo, it can be understood the effect of adding anthropogenic heat and also some effects of aspect ratio change of the buildings.
The slight negative trend of vapor pressure for 30 years can be seen from the simulated result. This negative trend is conflicting with the positive trend derived from the observational dataset though the significances of the observational trend are low.