Your SlideShare is downloading. ×
0
Physical Geography
Class 24
Types and Formation
Of Precipitation
© 2011 Pearson Education, Inc. 1
Precipitation
• Cloud droplets or crystals are too small
to fall
• Must combine to form precipitation
Warm Clouds: Collision - Coalescence
• Water drops form by condensation
• Grow by colliding with other drops
• Result: Rain
Cold Clouds: Bergeron process
• A mix of ice crystals and supercooled
water droplets (water droplets below
freezing but ha...
© 2011 Pearson Education, Inc.
Cold Clouds
5
Figure 6-28
At which latitude would the Collision-
Coalescense process be most
common?
© 2011 Pearson Education, Inc. 6
73%
27%
0% 1. ...
Types of Precipitation
• Snow (ice crystals)
• Rain and drizzle (liquid)
• Freezing rain or Glaze
• Sleet
• Hail
At which surface temperature would it be
hardest to predict type of precipitation?
© 2011 Pearson Education, Inc. 8
20%
50...
Snow
© 2011 Pearson Education, Inc. 9
What can happen to ice crystals on
their way from a cloud to the ground?
© 2011 Pearson Education, Inc. 10
100%
0%
0%
0% 1...
What can happen to snow on its
way to Earth?
• Can melt and form raindrops
• Can stay snowflakes
• Can melt and then refre...
Sleet = frozen pellets
• Snow melts, then refreezes in air
Freezing Rain
• Melts on its way to Earth, freezes only
when it contacts a solid surface
Which is more hazardous?
© 2011 Pearson Education, Inc. 16
0%
100%
0% 1. Sleet
2. Freezing rain
3. Snow
Hail
• Forms in cumulonimbus clouds only
During which season is hail
most common?
© 2011 Pearson Education, Inc. 18
27%
9%
0%
18%
45% 1. Winter
2. Spring
3. Summer...
© 2011 Pearson Education, Inc.
Atmospheric Lifting
• Four types of atmospheric lifting
19
Figure 6-32
Orographic Precipitation
• Ask me to tell you about my Glacier
Park camping trip (or stop me from
repeating myself)
Hawaii – where do the winds
come from?
Winds travel from:
© 2011 Pearson Education, Inc. 22
82%
0%
9%
9% 1. Bottom right to upper left
2. Top left to bottom righ...
GLOBAL DISTRIBUTION OF
PRECIPITATION
23
© 2011 Pearson Education, Inc.
Global Distribution of
Precipitation
• High precipitation regions, tropics
• Low precipitat...
© 2011 Pearson Education, Inc.
Global Distribution of Precipitation
25
Figure 6-35
© 2011 Pearson Education, Inc.
Acid Rain
• Definition of acid rain
• Sources of acid rain
• Principal acids—
sulfuric and ...
© 2011 Pearson Education, Inc.
Distribution of acid rain in US
27
© 2011 Pearson Education, Inc. 28
© 2011 Pearson Education, Inc. 29
© 2011 Pearson Education, Inc. 30
THE END
31
© 2011 Pearson Education, Inc.
Summary
• Moisture can impact the landscape in a variety of
ways, including fog, haze, and ...
© 2011 Pearson Education, Inc.
Summary
• There are several measures of vapor content in the
atmosphere, called humidity me...
© 2011 Pearson Education, Inc.
Summary
• Many processes are responsible for precipitation
• There are five primary types o...
© 2011 Pearson Education, Inc.
Global Distribution of Precipitation
35
Figure 6-37
Pg tp-class24-precipitation
Pg tp-class24-precipitation
Upcoming SlideShare
Loading in...5
×

Pg tp-class24-precipitation

399

Published on

Published in: Technology, Education
0 Comments
0 Likes
Statistics
Notes
  • Be the first to comment

  • Be the first to like this

No Downloads
Views
Total Views
399
On Slideshare
0
From Embeds
0
Number of Embeds
0
Actions
Shares
0
Downloads
5
Comments
0
Likes
0
Embeds 0
No embeds

No notes for slide

Transcript of "Pg tp-class24-precipitation"

  1. 1. Physical Geography Class 24 Types and Formation Of Precipitation © 2011 Pearson Education, Inc. 1
  2. 2. Precipitation • Cloud droplets or crystals are too small to fall • Must combine to form precipitation
  3. 3. Warm Clouds: Collision - Coalescence • Water drops form by condensation • Grow by colliding with other drops • Result: Rain
  4. 4. Cold Clouds: Bergeron process • A mix of ice crystals and supercooled water droplets (water droplets below freezing but haven’t frozen yet) • Deposition (sublimation) causes ice crystals to grow • Snowflakes grow big enough to fall from cloud
  5. 5. © 2011 Pearson Education, Inc. Cold Clouds 5 Figure 6-28
  6. 6. At which latitude would the Collision- Coalescense process be most common? © 2011 Pearson Education, Inc. 6 73% 27% 0% 1. Polar 2. Mid-latitudes 3. Tropical
  7. 7. Types of Precipitation • Snow (ice crystals) • Rain and drizzle (liquid) • Freezing rain or Glaze • Sleet • Hail
  8. 8. At which surface temperature would it be hardest to predict type of precipitation? © 2011 Pearson Education, Inc. 8 20% 50% 30% 0% 1. -10 to -6 degrees C 2. -2 to 2 degrees C 3. 6 to10 degrees C 4. 16 to 20 degrees C
  9. 9. Snow © 2011 Pearson Education, Inc. 9
  10. 10. What can happen to ice crystals on their way from a cloud to the ground? © 2011 Pearson Education, Inc. 10 100% 0% 0% 0% 1. It can remain in its original frozen form 2. It can melt and become rain 3. It can melt and then refreeze 4. Any of the above can occur
  11. 11. What can happen to snow on its way to Earth? • Can melt and form raindrops • Can stay snowflakes • Can melt and then refreeze  sleet or freezing rain
  12. 12. Sleet = frozen pellets • Snow melts, then refreezes in air
  13. 13. Freezing Rain • Melts on its way to Earth, freezes only when it contacts a solid surface
  14. 14. Which is more hazardous? © 2011 Pearson Education, Inc. 16 0% 100% 0% 1. Sleet 2. Freezing rain 3. Snow
  15. 15. Hail • Forms in cumulonimbus clouds only
  16. 16. During which season is hail most common? © 2011 Pearson Education, Inc. 18 27% 9% 0% 18% 45% 1. Winter 2. Spring 3. Summer 4. Fall 5. Equally common in all four seasons
  17. 17. © 2011 Pearson Education, Inc. Atmospheric Lifting • Four types of atmospheric lifting 19 Figure 6-32
  18. 18. Orographic Precipitation • Ask me to tell you about my Glacier Park camping trip (or stop me from repeating myself)
  19. 19. Hawaii – where do the winds come from?
  20. 20. Winds travel from: © 2011 Pearson Education, Inc. 22 82% 0% 9% 9% 1. Bottom right to upper left 2. Top left to bottom right 3. Bottom left to upper right 4. Top right to bottom left
  21. 21. GLOBAL DISTRIBUTION OF PRECIPITATION 23
  22. 22. © 2011 Pearson Education, Inc. Global Distribution of Precipitation • High precipitation regions, tropics • Low precipitation regions, deserts and poles 24 Figure 6-34
  23. 23. © 2011 Pearson Education, Inc. Global Distribution of Precipitation 25 Figure 6-35
  24. 24. © 2011 Pearson Education, Inc. Acid Rain • Definition of acid rain • Sources of acid rain • Principal acids— sulfuric and nitric • Number of hydrogen ions—pH 26 Figure 6-38
  25. 25. © 2011 Pearson Education, Inc. Distribution of acid rain in US 27
  26. 26. © 2011 Pearson Education, Inc. 28
  27. 27. © 2011 Pearson Education, Inc. 29
  28. 28. © 2011 Pearson Education, Inc. 30
  29. 29. THE END 31
  30. 30. © 2011 Pearson Education, Inc. Summary • Moisture can impact the landscape in a variety of ways, including fog, haze, and precipitation • The hydrologic cycle shows the balance between water removed from the oceans and water returned by precipitation • Water has a number of unique properties • Water vapor is the gas form of water • Evaporation rates change as surrounding atmospheric conditions change • There are several measures of vapor content in the atmosphere 32
  31. 31. © 2011 Pearson Education, Inc. Summary • There are several measures of vapor content in the atmosphere, called humidity measurements • Condensation is the process by which vapor is converted to liquid • Adiabatic processes explain changes in parcel temperature without the addition or subtraction of heat to the parcel • Clouds are a visual identification of saturation • Air has buoyancy associated with it that describes its stability 33
  32. 32. © 2011 Pearson Education, Inc. Summary • Many processes are responsible for precipitation • There are five primary types of precipitation • Atmospheric lifting occurs through four primary mechanisms • The most highly variable rainfall worldwide occurs over deserts • Tropical regions are generally wet • Acid rain affects the Northeast and results from compounds released into the air by humans 34
  33. 33. © 2011 Pearson Education, Inc. Global Distribution of Precipitation 35 Figure 6-37
  1. A particular slide catching your eye?

    Clipping is a handy way to collect important slides you want to go back to later.

×