MOVEMENTS OF OCEAN WATER

K.SUGUNA.R

PGT GEO

THREE TYPES OF MOVEMENTS• WAVES

• TIDES OCEAN CURRENTS

WAVES

• HORIZONTAL MOVEMENT OF WATER TOWARDS THE COAST AND AWAY FROM THE COAST

• CAUSED BY WIND• WHEN THE WIND MOVES OVER THE WATER SURFACE,IT

MAKES THE WATER PARTICLES TO MOVE

CHARACTERISTICS OF WAVES

• WAVE HEIGHT:VERTICAL DISTANCE BETWEEN TOP OF THE CREST AND THE BOTTOM OF TROUGH

• WAVE LENGTH: HORIZONTAL DISTANCE BETWEEN THE TWO SUCCESSIVE CRESTS

• WAVE PERIOD:TIME INTERVAL BETWEEN TWO SUCCESSIVE WAVES TO TOUCH A FIXED POINT.

TIDES

• THE PERIODICAL RISE AN FALL OF THE SEA LEVEL• ONCE OR TWICE A DAY• DUE TO THE ATTRACTION OF THE SUN AND THE

MOON.

SURGE

• MOVEMENT OF WATER BY METEOROLOGICAL EFFECTS(CYCLONE)

TYPES OF TIDES

• SPRING TIDES: • RISE VERY HIGH AND FALL VERY LOW • NEW MOON DAYS AND FULL MOON DAYS• SUN ,MOON AND EARTH ARE IN STRAIGHT LINE

• NEAP TIDES• NEITHER RISE VERY HIGH NOR FALL VERY LOW • QUARTER MOON DAYS • SUN ,MOON AND EARTH ARE IN RIGHT ANGLE

OCEAN CURRENTS

• LIKE RIVER FLOW IN OCEANS

• FLOW OF REGULAR VOLUME OF WATER IN A DEFINITE PATH AND DIRECTION

TYPES OF OCEAN CURRENTS • WARM CURRENT:

• MOVES FROM HOT REGION TO CCOLD REGION

• MOVES ALONG THE SURFACE OF THE OCEAN

• INCREASES THE TEMPERATURE OF THE REGION ALONG WITH IT FLOWS

• COLD CURRENT

• MOVES FROM HOT REGION TO CCOLD REGION

• MOVES ALONG THE SURFACE OF THE OCEAN

• INCREASES THE TEMPERATURE OF THE REGION ALONG WITH IT FLOWS