بررسی روند پارامتر بارندگی به روش گرافیکی ITA

Examining the trend of changes in meteorological parameters with long-term data can show the consequences of climate change in a region. The trend is one of the main factors of instability that can be caused by various factors from inside and outside the system. The purpose of this research is investigating the long-term trend of rainfall parameters using ITA graphic test in Fars province. The data of parameters related to 7 selected synoptic stations in a 40-year time series (1983-2022) were analyzed in monthly, seasonal, and annual time scales at the province level. The results show that the precipitation trend is meaningful decreasing on a monthly and annual scale, only in one Abadeh station is an meaningful increasing annual trend. Also, on a seasonal scale, in all stations, there is a meaningful decreasing trend in the winter season and an meaningful increasing trend in the summer season, except for Drudzen station, where the trend is reduced. The presence of a meaningful decreasing trend, especially in the winter season, can be an meaningful indication of the consequences of climate change in the studied area.