Investigating the effect of different weather patterns on the changes of heat waves in Nir city

Environmental changes The environmental environment of any environment can be changed. In case of achieving this goal, first the average daily statistics (2021-2009) were received from the General Meteorological Organization for Nair city. The maximum limit is determined by using 99% of Frein's threshold limit, then for Frein's days, the sea level pressure value was extracted from the Nova site, and on this model, patterning was done with Ward's hierarchical clustering method based on Euclidean distance. As a result, two major patterns were identified and one representative day of each pattern was included in the synoptic analysis. For this, NCEP-NCAR data were used to draw synoptic maps in the software environment. The results showed that the thermal low pressure systems that entered Iran from the south-east and south-west sides covered the entire geographical area of Iran and especially the studied area and brought an unstable atmosphere. At this time, the warm air from the southern latitudes that flowed through the Naveh channel in the west of Iran towards the northwest of Iran was blocked by the blocking barrier located in the western half of Iran. The anomalous state of air temperature showed that on the investigated day, temperature changes increased by 4 degrees Celsius compared to the length of the week. Geodetic maps of temperature and temperature advection at the level of 500 hectopascals also show that the origin of heat movement is from the north-east of Africa and has been drawn towards the study area, and heat convergence has occurred in the study area and has added to the temperature.