name the factors which give rise to ocean currents and modify their courses
Answers
Answer:
There are four factors affecting the origin and flow of Ocean Currents i.e. Rotation and gravitational force of the Earth; Oceanic factors (temperature, salinity, density, pressure gradient and melting of ice); atmospheric factors (atmospheric pressure, winds, rainfall, evaporation and insolation); factors that .
Explanation:
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Answer:
ocean currents are streams of ocean water continuously flowing in definite directions. they are caused by the action of planetary winds on the surface of Oceans and differences in the temperature salinity and density of the the rotation of the Earth and the shapes of coastlines control the movement of oceanthe rotation of the Earth and the shapes of coastlines control the movement of ocean currents and modify their courses. ocean currents move clockwise in the Northern hemisphere and anticlockwise in Southern hemisphere. ocean currents are visually narrow and more specifically at speeds of 3 to 10 kilometre per hour. broad slow moving water in the ocean are called drifts. the ocean current that flow from the equatorial region towards the polar regions are warm currents, e.g., Benguela current,Peru current and oya shio.
Effects of ocean current
ocean currents influence the climate and human activities of the coastal regions in a number of ways.
• warm ocean currents raise the temperature of the coast while cold ocean current lower the temperature.
• Wings that blow over warm currents are moist and bring rainfall to the coastal regions. that blow over cold currents are dry and hence they do not cause any rain.
• In places where warm and cold currents meet, plenty of blanktons are found. these are excellent food for fish. hence such returns are important fishing grounds. Hawa the mixing of warm and cold ocean currents produce dance for in this region. it reduces visibility and is dangerous for ship.
•Ocean currents influence navigation. ships sailing in the direction of the current will sale faster and save time and fuel.