ﺑﺮرﺳﯽ اﻣﮑﺎن رﺧﺪاد ﻓﺮاﺟﻮﺷﯽ ﺳﺎﺣﻠﯽ در ﺣﻮاﻟﯽ دﻣﺎﻏﮥ ﺟﺎﺳﮏ

Investigating the Potentiality of Upwelling in the Coastal Area of Jask Headland

ﻫﺪف از اﻳﻦ ﺗﺤﻘﻴﻖ، ﻣﻄﺎﻟﻌﻪ و ﺑﺮرسي رﺧﺪاد ﭘﺪﻳﺪه اﻗﻴﺎﻧﻮﺳﻲ-ﺟﻮي ﻓﺮاﺟﻮﺷﻲ در ﺳﻮاﺣﻞ اﻳﺮاﻧﻲ درﻳﺎي ﻋﻤـﺎن اﺳـﺖ ﺑـﻪ دﻟﻴـﻞ وﻳﮋﮔﻲﻫﺎي ﻣﻨﺤﺼﺮ ﺑﻪ ﻓﺮد ﻧﻮاحي ﻓﺮاﺟﻮشي، ﻣﻄﺎﻟﻌﺔ آن در اﻣﺘﺪاد ﺳﻮاﺣﻞ ﺟﺎﺳﻚ ﺣﺎﺋﺰ اﻫﻤﻴﺖ اﺳﺖ. ﺑﻪﻣﻨﻈـﻮر ﺑﺮرﺳـﻲ رﺧـﺪاد ﻓﺮاﺟﻮشي ﺳﺎﺣﻠﻲ در ﺟﺎﺳﻚ از ﻧﺮم اﻓﺰار آرك ﺟﻲ اي اس و ﻣﺪل ﻫﻴﺪرودﻳﻨﺎﻣﻴﻜﻲ ﻧﺮم اﻓﺰار ﻣﺎﻳﻚ 3 اﺳﺘﻔﺎده ﺷﺪ. ﺑﺎ ﻧﺮم اﻓﺰار آرك ﺟﻲ اي اس، ﻧﻘﺸﻪﻫﺎي اﻟﮕﻮي ﺑـﺎد ﻏﺎﻟـﺐ، دﻣـﺎي ﺳـﻄﺢ درﻳـﺎ و ﻓﺮاواﻧـﻲ ﻏﻠﻈـﺖ كلروﻓﻴـﻞ -a  ﺑـﺎ اﺳـﺘﻔﺎده از داده ﻫـﺎي ﺳﻨﺠﺶ از دور ﻣﺎﻫﻮاره اي ﺑﻪﻋﻨﻮان ﺷﻮاﻫﺪ اوﻟﻴﻪ ﻣﺒﻨﻲ ﺑﺮ وﻗﻮع ﺳﻴﺴﺘﻢ ﻓﺮاﺟﻮﺷﻲ ﺑﺮاي ﺳﺎل 2016 آﻣﺎده ﺷﺪ. در ﺑﺨﺶ ﺷﺒﻴﻪﺳـﺎزي از ﻳﻚ ﺷﺒﻜﻪﺑﻨﺪي افقي ﺑﺎ ﺗﻜﻨﻴﻚ ﻣﺶﺑﻨﺪي ﻧﺎﻣﻨﻈﻢ و ﺷﺒﻜﻪﺑﻨﺪي ﻗﺎﺋﻢ ﺑﺎ 10 ﻻﻳه ﺳﻴﮕﻤﺎ در ﻧﺮم اﻓﺰار ﻣﺎﻳﻚ 3 اﺳﺘﻔﺎده ﺷـﺪ ﭘـﺲ از ﺗﻨﻈﻴﻢ، اﺟﺮا و ﻛﺎﻟﻴﺒﺮه ﻛﺮدن ﻣﺪل، ﻧﺘﺎﻳﺞ ﺑﺮاي ﺑﻨﺪر ﺟﺎﺳﻚ ﻣﻮرد ﺑﺮرﺳﻲ ﻗﺮار ﮔﺮﻓﺖ. اﻳﻦ ﻧﺘﺎﻳﺞ ﺑﻪ ﻫﻤﺮاه ﺗﺼﺎوﻳﺮ ﻣـﺎﻫﻮاره اي ﻛﻪ ﺑﺎ ﻧﺮم اﻓﺰار آرك جي اي اس، ﺑﺎزﺧﻮاﻧﻲ ﺷﺪه، ﻧﺸﺎن دﻫﻨـﺪه رﺧـﺪاد ﻓﺮاﺟﻮﺷـﻲ ﺳـﺎﺣﻠﻲ در ﺑﻨـﺪر ﺟﺎﺳـﻚ در دوره ﮔـﺬر از ﻣﻮﻧﺴﻮن (اﻛﺘﺒﺮ و ﻧﻮاﻣﺒﺮ) ﺑﻮد ﻛﻪ ﺑﺎ اﻟﮕﻮي ﺑﺎد ﻏﺎﻟﺐ در درﻳﺎي ﻋﻤﺎن ﺑﻪﺧﺼﻮص در ﺳﻮاﺣﻞ ﺟﻨﻮبﺷﺮﻗﻲ اﻳـﺮان ﻛـﺎﻣﻼً ﻣﻄﺎﺑﻘـﺖ دارد.

The aim of this research is studying the possibility of upwelling occurrence in the Iranian coastal area of Oman Sea. The occurrence of such a unique phenomenon near the coastal area of Jask made it a suitable subject to the study. To achieve this aim ArcGIS and MIKE3 softwares were employed. Year 2016 was considered for this research. Using ArcGIS techniques the patterns of prevailed wind, sea surface temperature, and concentrated chlorophyll-a using satellite remote measurement data for the area under investigation were taken into consideration. These plots confirm the probability of occurrence of upwelling in the area. For the simulation with MKE3, irregular mesh was designated as horizontal grids. In the vertical direction sigma layer stratification with 10 layers were chosen. After calibrating the model, results derived from the simulation were analyzed around Jask headland. The results indicate the existence of an upwelling during transition period of monsoon (October and November). This was simultaneous with the prevailed wind in the southwestern coast of Oman Sea.