List of Articles تخمينگر شيب سن Open Access Article Abstract Page Full-Text 1 - Analyzing Long-Term Changes Trend of Precipitation Concentration Index (PCI) as an Indicator of Climate Change in the Persian Gulf and Oman sea Basin Peyman Mahmoudi Ebrahim Fattahi Mohsen Heydari Allahbakhsh Rigi Alireza Ghaemi Jabbar Rezaei