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mayang/textures/Nature/html/Clouds/

Moisture in the Air. http://www.mayang.com/textures/Nature/html/Clouds/. What is water vapor?. Water vapor is water in its invisible gas state . If you can see it, it is not water vapor!. Are clouds water vapor?. NO ! You can see them!. Why is water vapor important?.

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mayang/textures/Nature/html/Clouds/

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  1. Moisture in the Air http://www.mayang.com/textures/Nature/html/Clouds/

  2. What is water vapor? Water vapor is water in its invisible gas state. If you can see it, it is not water vapor!

  3. Are clouds water vapor? NO! You can see them!

  4. Why is water vapor important? • absorbs heat to keep the atmosphere warm, • forms clouds and precipitation, and • helps us to breathe What vapor is important because it…

  5. What is humidity? • Humidity is the amount of water vapor in the atmosphere. • It varies from 0-4%.

  6. How does temperature affect humidity?

  7. more Warm air holds ____ water vapor than cold air!

  8. What is saturation? The air is saturated when it is holding all of the water vapor that it can hold at its current temperature.

  9. how much water vapor the air can hold

  10. The temperature at which the air becomes saturated is known as its _________ . dew point

  11. What is relative humidity? Relative humidity is a measure of how “full” the air is of water vapor at its current temperature. It compares the amount of water vapor in the air with total amount that the air can hold.

  12. The weather man reports that the relative humidity is 100%. What does that mean? The air is holding 100% of the water vapor that it can hold! If the relative humidity in our classroom is 50%, what does that mean?

  13. Relative Humidity

  14. What would the relative humidity be if… • the air was holding 4 g/kg of water vapor while its maximum capacity was 20 g/kg? 4 g/kg x 100 = 20 g/kg 20%

  15. What would the relative humidity be if… • the air was holding 5 g/kg of water vapor while its maximum capacity was 20 g/kg? 5 g/kg x 100 = 20 g/kg 25%

  16. What would the relative humidity be if… • the air was holding 10 g/kg of water vapor while its maximum capacity was 20 g/kg? 10 g/kg x 100 = 20 g/kg 50%

  17. What would the relative humidity be if… • the air was holding 15 g/kg of water vapor while its maximum capacity was 20 g/kg? 15 g/kg x 100 = 20 g/kg 75%

  18. how much water vapor the air can hold (capacity)

  19. How do we measure relative humidity? sling psychrometers

  20. Questions for Thought: 1. How much water can a kilogram of air that is 77°F hold?

  21. Questions for Thought: 2. How many grams of water vapor is needed to saturate a 95°F kilogram of air?

  22. Questions for Thought: 3. What is the temperature of the air if it has 14g of water vapor/kg and it is saturated?

  23. Questions for Thought: 5. A parcel of air has a relative humidity of 95%. Is the air saturated?

  24. How does air’s temperature affect its ability to hold water vapor?

  25. Resources http://www.cs.wisc.edu/~sastry/calendar/clouds.jpg http://www.uwsp.edu/geo/faculty/lemke/images/atmosphere/humidity_water_glasses.gif http://hometown.aol.com/peterschwe/h1f.jpg http://jamaica.u.arizona.edu/ic/nats1011/lectures/ch05/FIG05_007.JPG http://jamaica.u.arizona.edu/ic/nats1011/lectures/ch05/FIG05_016A.JPG http://geowww.geo.tcu.edu/faculty/slattery/GEOL30113/Water/16 http://www.geog.umn.edu/faculty/klink/geog1425/images/lapse_rates/dry_ad_lapse_rate.jpg http://www.geog.ucsb.edu/~joel/g110_w03/chapt04/cooling/agburt2_04_11.jpg http://members.aol.com/pakulda/images/atpptalr.gif http://www.geog.ucsb.edu/~joel/g110_w03/chapt04/cooling/agburt2_04_12.jpg http://geology.csupomona.edu/drjessey/class/Gsc101/adiabatic.gif http://cwx.prenhall.com/bookbind/pubbooks/aguado/chapter5/deluxe.html http://www.unca.edu/~dmiller/5 http://asd-www.larc.nasa.gov/edu_act/clouds_fig28.gif http://www.science.duq.edu/esm/Course_Material/ESM551/Notes_Only/Climates/GIFS/DiagramVI3.HTML http://www.geog.umn.edu/faculty/klink/geog1425/images/stability/temp_hot_day.GIF http://images.google.com/imgres?imgurl=http://www.chagres.com/ae-rainforest-1.jpg&imgrefurl=http://www.chagres.com/AE-3.html&h=481&w=720&sz=43&tbnid=MfVOdUukpX4J:&tbnh=92&tbnw=137&start=4&prev=/images%3Fq%3Drainforest%26hl%3Den%26lr%3D%26sa%3DN http://images.google.com/imgres?imgurl=http://www.geoexplorer.co.uk/sections/geophotos/collection8/images/tenga%2520desert.jpg&imgrefurl=http://www.geoexplorer.co.uk/sections/geophotos/collection8/collection8.htm&h=480&w=640&sz=21&tbnid=_tTlcn_su00J:&tbnh=101&tbnw=134&start=2&prev=/images%3Fq%3Ddesert%26hl%3Den%26lr%3D

  26. Resources • http://pegasus.me.jhu.edu/~lpei/images/pei/ocean.jpg • http://www.heronsgate.milton-keynes.sch.uk/projects/Transpiration/flo.gif • http://www.shoalwater.nsw.gov.au/4education/images/transpir.jpg • http://www.css.cornell.edu/faculty/hmv1/watrshed/CDIA1D5.gif • http://www.jefferyscottmitchell.com/Images/scenes/clouds-sky/clouds-8-2000/Image36.jpg

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