november 10, 2011
DESCRIPTION
November 10, 2011. Objective: Determine Relative Humidity and dew point at various places around Riverheads HS. Agenda: Go over Relative Humidity/dew point worksheet Go over Test Lab: Relative Humidity Wind Notes. How to determine Dew Point & Humidity. Use a sling psychrometer: - PowerPoint PPT PresentationTRANSCRIPT
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November 10, 2011
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Objective:Determine Relative
Humidity and dew point at various places around Riverheads HS
Agenda:Go over Relative
Humidity/dew point worksheet
Go over TestLab: Relative
HumidityWind Notes
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How to determine Dew Point & Humidity
Use a sling psychrometer:
1. Find the "dry bulb temp"
2. Subtract the dry and wet bulb.
3. Find the difference on the top
Use the exact same procedure for finding the Relative HumidityCHECK YOUR CHART!!
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Moving air is called Wind
231mph @ Mt. Washington, NHApril 12, 1934
http://www.mountwashington.org/about/visitor/recordwind.php
World's Strongest Wind:
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Wind
Basic Rules:
1. Warm air rises
2. There is always air
3. Warm air cools off
4. The Sun heats the GROUND
Wind is caused by differences in air
pressure
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Wind
Low Pressure
L
High Pressure
HWIND
Wind moves from
________________
to
________________
Remember that...
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WindWhich way is it moving??
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WindHow about here? ?
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Isomaps & Wind
Isobars:connect pointsof equal pressureThe closer the linesthe higher the windspeed.
http://ww2010.atmos.uiuc.edu/(Gh)/wx/surface.rxml
Think of contourmaps made of hills of air...
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There is always a more complex map
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Global Winds
Same thing; sideways and double
Warm air risesAi
r mov
es in
Air co
ols off
and s
inks
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wind is measured by an anemometer (wind speed) and a wind vane (direction)
Wind moves from areas of high pressure to areas of low pressure
Coriolis Effect: Because the earth is rotating, wind appears to curve.
In the northern hemisphere it curves to the right.
The Rules of Wind
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Coriolis Effect
Because the Earth isrotating, the movementof objects appearsto curve.In the NORTH thecurve is to the right.
coriolis.mov
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Weather Instruments
Wind Vaneswind
direction
Thermometers
Temperature
BarometersAir
Pressure
AnemometersWind Speed
Leaning Tower of Pisa Mt. Washington -