Original: During study of fluid mechanics, researchers attempted to give a correct vision of maritime currents. The origin of currents is owed to physical differences between various water masses, the main parameter being the difference of density that varies in function of the temperature and the concentration of salt .
Revised: During study of fluid mechanics, researchers attempted to give a correct explanation of marine currents. Currents are caused by external driving forces such as wind, gravitational effects, coriolis forces and physical differences between various water masses, the main parameter being the difference of density that varies in function of the temperature and the concentration of salt .
Edit intent: clarity