Moisture in the atmosphere 2
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Transcript of Moisture in the atmosphere 2
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MOISTURE IN THE ATMOSPHERE
K.SUGUNA.R
PGT GEO
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EVAPORATION AND CONDENSATION
EVAPORATION:THE PROCESS OF CHANGING OF WATER INTO WATERVAPOUR
DUE HEATING OF THE ATMOSPHERE CONDENSATION:THE PROCESS OF CHANGING OF
WATERVAPOUR INTO WATER DUE TO COOING OF THE ATMOSPERE
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HUMIDITY ABSOLUTE HUMIDITY:ACTUAL AMOUNT OF WATERVAPOUR
PRESENT IN THE ATMOSPHERE RELATIVE HUMIDITY: RATIO BETWEEN THE AMOUNT OF
WATERVAPOUR PRESENT IN THE ATMOSPHERE AND THE AMOUNT OF WATER VAPOUR IT CAN HOLD AT A PARTICULAR PARTICULAR TEMPERATURE
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FORMS OF CONDENSATION
DEW FROST FOG AND MIST CLOUDS
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DEW MOSTURE DEPOSITED IN THE FORM OF WATER
DROPLETS ON STONES GRASS BLADES PLANT LEAVES IDEAL CONDITIONS- CLEAR SKY,CALM AIR,HIGH
RELATIVE HUMIDITY,COLD AND LONG NIGHTS.
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FROST MOISTURE DEPOSITED IN THE FORM OF ICE CRYSTALS. WHEN CONDENSATION TAKES PLACE BELOW FREEZING
POINT. IDEAL CONDITIONS- CLEAR SKY,CALM AIR,HIGH
RELATIVE HUMIDITY,COLD AND LONG NIGHTS. AIR TEMPERATURE BELOW THE FREEZING POINT.
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FOG AND MIST FOG IS A CLOUD WITH ITS BASE NEAR TO THE GROUND. MIST FORMS WHEN THE RISING WARM AIR UP THE
SLOPES MEETS A COLD SURFACE. THE ONLY DIFFERENCE BETWEEN MIST AND FOG IS THAT
MIST CONTAINS MORE MOISTURE THAN THE FOG.
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CLOUDS CLOUD IS A MASS OF MINUTE WATER DROPLETS FORMED BY CONDENSATION OF WATERVAPOUR IN FREE AIR
AT CONSIDERABLE ELEVATION.
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PRECIPITATION
THE FALLING OF WATER THROUGH THE ATMOSPHERE TO THE EARTH SURFACE
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FORMS OF PRECIPITATION
RAIN FALL SNOW FALL SLEET HAIL STONE
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RAINFALL
THE PRECIPITATION IN THE FORM OF WATER
CONDENSATION TAKES PLACE ABOVE FREEZING POINT
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SNOW FALL THE PRECIPITATION IN THE FORM OF FINE FLAKES OF
SNOW CONDENSATION TAKES PLACE BELOW FREEZING
FREEZING POINT MOISTURE IS RELEASED IN THE FORM OF HEXAGONAL
CRYSTALS THESE CRYSTALS FORM FLAKES OF SNOW
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SLEET FROZEN RAINDROPS AND REFROZEN MELTED SNOW WATER WARM LAYER OF AIR LIES ABOVE COLD LAYER RAIN DROPS WHICH LEAVE THE WARM LAYER ENCOUNTER THE COLD
AIR BELOW. AS A RESULT THEY SOLIDIFY AND REACH THE GROUND AS SMALL
PELLETS OF ICE NOT BIGGER THAN THE RAIN DROPS FROM WHICH THEY ARE FORMED
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HAILSTONE DROPS OF RAIN AFTER BEING RELEASED BY THE CLOUDS BECOME
SOLIDIFIED INTO SMALL ROUNDED SOLID PIECES OF ICE FALLING RAINDROPS CARRIED AWAY BY STRONG CONVECTIONAL
CURRENTS THEY GET COOLED AND SOLIDIFIED AND FALL AS HAILSTONES
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TYPES OF RAIN
CONVECTIONAL RAIN OROGRAPHIC RAIN CYCLONIC RAIN
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CONVECTIONAL RAIN
RAIN IS CAUSED BY CONVECTIONAL AIR CURRENTS COMMON IN EQUATORIAL REGIONS HEAVY RAIN ASSOCIATED WITH LIGHTNING AND
THUNDER
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OROGARPHIC RAIN
CAUSED BY RELEIF OR A MOUNTAIN WINDWARD SIDE RECEIVES MORE RAINFALL LEEWARDSIDE RECEIVES NO OR LESS RAINFALL
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CYCLONIC RAIN CAUSED BY CYCLONE HEAVY RAIN ALONG THE COASTAL REGIONS CAUSES DEMAGES TO THE LIFE AND PROPERTIES