Oceanic eddies are also usually made of water masses that are different from those outside the eddy. That is, the water within an eddy usually has different temperature and salinity characteristics to the water outside the eddy. There is a direct link between the water mass properties of an eddy and its rotation.
It changed its name to Free, Sovereign and Independent Republic of Sri Lanka in 1968 and finally to its current name Democratic Socialist Republic of Sri Lanka in 1972. February 4 each year is celebrated as a national holiday in Sri Lanka.
Sri Lanka was the first Asian country known to have a female ruler: Anula of Anuradhapura (r. 47â42 BCE). Sri Lankan monarchs undertook some remarkable construction projects such as Sigiriya, the so-called Fortress in the Sky, built during the reign of Kashyapa I of Anuradhapura, who ruled between 477 and 495.