Post on 17-Jan-2016
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ESRT 2 Air MassesPart 2
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Air PressureESRT 1
What is the dewpoint when the dry-bulb temperature is 8°C and the wet-bulb
temperature is 6°C?
3°C
Which ocean current warms the
climate of northwestern
Europe?
North Atlantic Current
Most of the air in the lower troposphere at the equatorial low-
pressure belt is:
A. Warm, moist, and risingB. Warm, dry, and rising
C. Cool, moist, and sinkingD. Cool, dry, and sinking
A.
What is the dewpoint when the air
temperature is 26°C and the relative
humidity is 77%?
22°C
At which position should the measurements from a rain
gauge be recorded?
D
In which planetary wind belt do most storms move toward
the northeast?
A. 30 N to 60 N⁰ ⁰B. 0 to 30 N⁰ ⁰C. 0 to 30 S⁰ ⁰
D. 30 S to 60 S⁰ ⁰
A.
What is the dewpoint if the relative humidity is
100% and the air temperature is 20°C?
20°C
An air mass classified as cT
usually forms over which type of
Earth surface?
Warm land
On a cold winter day, the air temperature is 2°C
and the wet-bulb temperature is –1°C. What is the relative
humidity at this location?
51%
Convert -8°F to Celsius
-22°C
The direction of movement of the major surface ocean
currents is most affected by Earth’s…
A. Tilted axis B. Prevailing winds
C. Rate of revolution D. Tidal action
Prevailing Winds
Which weather variable generally
decreases when wind speed is increasing,
clouds are thickening and visibility drops?
Air Pressure
Which weather information shown at station B was measured with an anemometer
and weather vane?
A. B. 34 C. D. 138
A
What are the dewpoint and wind direction shown
on the station model below?
72°F and wind from the southeast
On the board…correctly draw a station model using the following
information?
Dewpoint: 48°FAir pressure: 998.3 mb
Wind: from the southeastWind speed: 10 knots
983
48
Jet stream winds over the United States generally
move from _______ to _________.
West to East
Which atmospheric conditions describe the air
mass that is influencing weather conditions at
location C?
Warm and moist
What is the difference in the air temperature and humidity between a
cP and mT air mass?
A. The cP air mass is warmer and less humidB. The cP air mass is colder and more humidC. The mT air mass is warmer and more humid
D. The mT air mass is colder and less humid
C
Which cross section below best represents the conditions that cause
early winter lake-effect snowstorms in New York State?
A
B
C
D
A
Which geographic region is the most common source
region for the mT air masses that move into
New York State?
Gulf of Mexico
What was the most likely dewpoint at this location and
why?A. 70 F⁰B. 61 F⁰C. 47 F⁰D. 32 F⁰
61 F…because the ⁰dewpoint and air
pressure need to be close together in order for precipitation to be
occurring.
Explain why Chicago has the lowest relative
humidity.
Because the difference between the dewpoint and air temperature is
the greatest.
Why are clouds forming at location
2?
Because the air is expanding and
cooling to reach the dew point.
At which location would thunderstorms most likely be
occurring?
Z because it is closest to a cold
front.
State the relationship
between temperature and
pressure.
As air temperature increases, air
pressure decreases.
Make your wager
Final Answer
Final Question