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Moisture in the atmosphere 2

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I Spell SSt inservice course KVGN

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Moisture in the atmosphere 2

  1. 1. MOISTURE IN THE ATMOSPHERE K.SUGUNA.R PGT GEO
  2. 2. 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
  3. 3. 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
  4. 4. FORMS OF CONDENSATION  DEW  FROST  FOG AND MIST  CLOUDS
  5. 5. 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.
  6. 6. 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.
  7. 7. 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.
  8. 8. CLOUDS    CLOUD IS A MASS OF MINUTE WATER DROPLETS FORMED BY CONDENSATION OF WATERVAPOUR IN FREE AIR AT CONSIDERABLE ELEVATION.
  9. 9. PRECIPITATION  THE FALLING OF WATER THROUGH THE ATMOSPHERE TO THE EARTH SURFACE
  10. 10. FORMS OF PRECIPITATION  RAIN FALL  SNOW FALL  SLEET  HAIL STONE
  11. 11. RAINFALL  THE PRECIPITATION IN THE FORM OF WATER  CONDENSATION TAKES PLACE ABOVE FREEZING POINT
  12. 12. 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
  13. 13. 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
  14. 14. 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
  15. 15. TYPES OF RAIN  CONVECTIONAL RAIN  OROGRAPHIC RAIN  CYCLONIC RAIN
  16. 16. CONVECTIONAL RAIN    RAIN IS CAUSED BY CONVECTIONAL AIR CURRENTS COMMON IN EQUATORIAL REGIONS HEAVY RAIN ASSOCIATED WITH LIGHTNING AND THUNDER
  17. 17. OROGARPHIC RAIN    CAUSED BY RELEIF OR A MOUNTAIN WINDWARD SIDE RECEIVES MORE RAINFALL LEEWARDSIDE RECEIVES NO OR LESS RAINFALL
  18. 18. CYCLONIC RAIN    CAUSED BY CYCLONE HEAVY RAIN ALONG THE COASTAL REGIONS CAUSES DEMAGES TO THE LIFE AND PROPERTIES

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