Towards modeling the regional rainfall changes over Iran due to the climate forcing of the past 6000 years

• DOI: 10.1016/j.quaint.2015.09.061
• Publication Date: 2015-10-26T17:38:31Z
• Authors: Bijan Fallah; Sahar Sodoudi; Emmanuele Russo; Ingo Kirchner; Ulrich Cubasch
• Keywords: Anomaly (physics); Forcing (mathematics); Atmospheric Circulation; Milankovitch cycles

We present a climate modeling approach to reproduce the rainfall patterns over Iran due climatic forcings during past 6000 years. The selected periods are simulated using spatially high-resolved atmosphere General Circulation Model (GCM). Our results show that winter have changed changes in solar insolation with wetter condition starting around 3 ka BP and reaching its maximum Medieval Climate Anomaly ca. 1 BP. variability can be explained by atmospheric conditions as result of changing incoming irradiance based on Milankovitch theory. A shift Earth's energy budget leads modulation West Asian Subtropical Westerly Jet (WASWJ). investigations support hypothesis Holocene northward WASWJ contributes less cyclonic activities Iran. This brings moisture into region winter.