Movement Of Ocean Water Flashcards
What determines height of the wave?
Speed of wind
How long it is blowing
Area over which it is blowing in single direction
What are surges?
Movement of water caused by meteorological effect like wind and atm pressure change is called surge
What are the factors that affect tides?
Moon’s gravitation
Sun’s gravitation
Centrifugal force of Earth’s rotation
Why tidal bulges are more high and wide at continental shelves than deep sea?
When tide occur, they occur as waves deep sea has more tidal wave speed due to greater depths…in shallow water the speed of wave decrease becoz of less depth thus the height increase becoz wave energy remains same
Why mid oceanic islands have less height of tidal bulges?
Becoz of more depth of water even at shore
What are tidal currents?
Where tidal currents occur in India?
When tides are channelled into bays , estuaries, and between Islands ..they are called tidal currents
West coast…gulf of khambat, gulf of kutch, gangetic delta Sunderbans
Name three types of tides based on frequency
Semi diurnal
Diurnal
Mixed
Name areas where mixed tides are experienced
West coast of north America and islands of Pacific Ocean
Where highest tide occur in world?
Nova scotia, canada
How gravity creates variation from pole to Equator in movement of water?
Gravity at poles is higher therefore water is a bit lower creating gradient to flow
How gravity creates variation from pole to Equator in movement of water?
Gravity at poles is higher therefore water is a bit lower creating gradient to flow
What are two types of ocean currents based on depth?
What percent of all water of ocean constituted by surface current?
Depth of surface current?
Surface and deep water
10%
90% - deep current
Upto 400m deep
