Examining the growth of cities on the changes of temperature and precipitation parameters Babolsar

In order to study the effect of urbanization growth on temperature and precipitation in Babolsar Station in the period 1989-2008 and show differences, two types of urban and non-urban stations were selected. According to the criterion of distance up to 500 meters from the city border, Babolsar Station was selected as the urban station, and based on the criterion of at least 2 km away from the nearest town, Gharakheil, Sari, and Nowzarabad stations were selected as non-rural ones. Urban development index and Shannon entropy were used to measure urban development and Mann-Kendall was used to study changes in climatic parameters. The results of the physical condition of Babolsar Station indicate a dramatic fragmented physical development. Analysis of the trend of temperature and precipitation showed that total monthly precipitation indices, the number of days with precipitation of 1 mm or more, the average temperature, and the average minimum daily temperature follow a significant trend and gradient of their changes in the urban station of Babolsar is more specific and steep than non-urban stations. Kendall Tau of the temperature and precipitation changes show that climatic data of Babolsar Station are influenced by the urban microclimate and the environment around the station. Since Babolsar Stations was formerly located outside the urban area and then became an urban station and urban development of Babolsar caused changes in temperature and precipitation of this station, many studies cannot use these changed data as a result of urban development around the station and the results obtained from data of Babolsar Station will be generalizable to urban conditions expanded around it.