prediction and assessment of Climate Change in Bojnourd Station in 2016-2050 using down-scaling models LARS WG and SDSM

The climate of the land has always been changing over time but the current trend in climate change has become important due to the role of humans which has been unprecedented over the past years.in this study, The LARS WG and SDSM models are used to evaluate the climate change at Bojnourd station for downscaling climate. The result of the status of the station showed the temperature of the station is higher than its long-term average. The results of the LARS WG model show that precipitation will increase at the station at 2050 year. In scenario B1, the amount of precipitation increase almost 16 mm more than base precipitation to 2050.In totally the SDSM model downloading to increase precipitation that this the increase showed A1 and B2 scenarios more than rcp scenarios, therefore In the scenarios, A2 value is 289mm, B2 is 294 mm, rcp 2.6 is 264 mm, rcp4.5 is 273 mm and in rcp8.5 is 264 mm. In the LARS WG model, the minimum temperature increases in both cases. The maximum winter temperature rise is 0.8 c in the A2 scenario. In both scenarios, the maximum temperature in March, April and May is the highest increase to compare to other months. The SDSM model showed that the maximum and minimum annual temperatures of model is lower than the base period. But the temperature in March, April and May increase the minimum and maximum, which indicates the matching of the results of both models.