Inferences about the heat-island circulation from a study on the evolution of the nocturnal heat island at Pune

A study was made on the evolution of the heat-island pattern at Pune on the night of 22/23, January, 1982.The corrections required to increase the accuracy of the mobile survey technique, used for such and studies have been elaborately discussed. An attempt has been made to find out a. relationship between the evolving heat island pattern and the presence of a solenoid circulation. The fluctuating nature of such a circulation has been changing shapes of isotherms. The role played by the nature of terrain of terrain and the aerial extent of the vertical circulation have also been inferred from this study.