Negin Hatami Bavarsad - College of Marine Sciences, Tarbiat Modares University, Iran
Dariush Mansoury - College of Marine Sciences, Tarbiat Modares University, Iran
Mohammad Reza Khalilabadi - Faculty of Naval Aviation, Malek Ashtar University of Technology, Shiraz, Iran
Mohammad Malekilonbar - College of Marine Science, Tarbiat Modares University, Iran

In this article, source and trace of the cyclones produced on the Caspian Sea were investigated from ۲۰۱۲ to ۲۰۱۷. The required data for this research consists of water level data recorded at stations such as Amirabad port, as well as other ports, mean atmospheric pressure at the Sea surface and wind data from ECMWF Web site. Results show that source of atmospheric low pressure is from the southwest and west of the Caspian Sea and in ۲۰۱۶ it is from the northern region of this basin. These atmospheric low pressures mostly enter to the Caspian Sea from the northwest of the mid Caspian Sea and their moving trace is to the east and southeast of the southern Caspian Sea. With the investigation of the impact of atmospheric low pressure and wind on the water level of Caspian Sea, in the coasts of Bandar-e Anzali, Fereydunkenar and Amirabad, it was obtained that in ۲۰۱۳ and ۲۰۱۶ low pressure effect and in ۲۰۱۵ wind effect was the most effective phenomena on the water level. The maximum movement velocity of the atmospheric cyclones from ۲۰۱۲ to ۲۰۱۷ was respectively equal to ۱۰.۱۷, ۷.۹۶, ۴۴.۷, ۱۶.۷, and ۲.۶ m/s.

sea level, Atmospheric low pressure, wind, the Caspian Sea, Sea levl