It is called a sea because when the Romans arrived for their first time, they tasted the water and found it to be salty.
The word Caspian is derived from the name of the Caspi, an ancient people who lived to the southwest of the sea in Transcaucasia.
Strabo wrote that "to the country of the Albanians belongs also the territory called Caspiane, which was named after the Caspian tribe, as was also the sea; but the tribe has now disappeared".
From the beginning, the program has operated as a joint enterprise of the International Union of Geological Sciences (IUGS) and the United Nations Educational, Scientific, and Cultural Organization (UNESCO).
During 1929–1995, a full sea-level cycle was observed.
This can help us in understanding the pace of global change in the northern hemisphere in the past, and to improve prediction of future Caspian sea-level change and its enviromental consequences.