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46 Cards in this Set
- Front
- Back
- 3rd side (hint)
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5 spheres |
Troposphere, Stratosphere , Mesosphere, Thermosphere, Exosphere. |
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Where does most weather take place? |
Troposphere |
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Where does northern lights occur? |
Thermosphere |
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ISA ( International Standard Atmosphere) |
Standard pressure 29.92 Hg. 1013.25 mb. Temperature 59F 15C |
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Standard Lapse rate |
For each 1000 ft of increase temp drops 3.5F or 2 C. Pressure decreases 1Hg |
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Energy is transferred by |
Radiation, conduction, convection/advection. |
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Effects of radiation from the sun depends upon three things |
Time of day, Time of year, latitude. |
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Vertical movement of air |
Convection: results in clouds, thunderstorms, etc |
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Horizontal movement of air |
Advection |
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Surface temp |
5 ft above the ground |
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Indicated air temp |
Measured by probe on an aircraft. Greater than actual temp due to friction, air compression, heating of the probe. |
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Atmospheric pressure |
Weight of a single column of the air above the point of measurement. 14.7 lbs at sea level |
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Altitude show on altimeter |
Indicated altitude |
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Height above mean sea level |
True altitude |
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Pressure altitude |
Indicated altitude when altimeter is set to 29.92 |
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Pressure altitude corrected for nonstandard temperature variations |
Density altitude |
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Pressure vs temp vs altitude |
As you move up through atmosphere temp will decrease. A decrease in temp will cause an increase in density. Increase in density causes and increase in pressure |
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Shows current weather conditions including frontal and high/low pressure positions, satellite infrared cloud cover. Areas of precipitation based on information from ground based weather stations. |
Surface analysis chart |
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Altimeter |
A sensitive barometer which is calibrated to indicate altitude in the standard atmosphere. Puts ground stations and aircraft on a level playing field |
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Attitude the airplane thinks it is at |
Density altitude |
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Low density altitude (dense air) is |
Is good thing |
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High density ( thin air) is a |
Bad thing. With high density altitude your aircraft "thinks" and performs like it is taking off from a higher elevation airport than it really is |
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Airfield elevation corrected for nonstandard standard pressure |
Pressure altitude |
Peer |
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Pressure altitude corrected for nonstandard temperature |
Density altitude |
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Is high or low density good for aircraft? and equals better performance? |
Low density |
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Coordinated universal time |
Start time of each day no matter your location |
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Zulu example if it's 1300 eastern time zone in ohio and we are in daylight savings we add 4 hours if not we add 5. Making it.. |
1700z if we add 4 and 1800z if we add 5 |
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ICAO |
International Civil Aviation organization |
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ICAO INFO |
1st letter region of the world 2nd letter country 3rd and 4th airport |
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Several "circulations" categories |
*micro: gust, dust Devils, and thermals *meso: cumulus, tornado, thunderstorm, squall line, land/sea breeze *macro: front, Hurricane, occluded cyclone, global circulation patterns |
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Global circulation |
Lists the cells and winds |
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Six major wind belts 3 each hemisphere |
Polar Easterlies, prevailing westerlies, and trade winds |
Work In conjunction with polar, Ferrell, and Hadley cells. Affected by coriolis force |
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Area encircling the earth near the equator where the northeast and Southeast trade winds come together |
Intertropical Convergence Zone ITCZ |
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Monsoon |
Seasonal reversing wind accompanied by corresponding changes in precipitation. Convergence Zone between the wind patterns of the southern and northern hemispheres Used to describe seasonal changes in atmospheric circulation and precipitation associated with asymmetric heating of land and sea. |
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5 classifications of air masses that surround North America. |
1)maritime polar 2) maritime tropical 3)continental polar 4) continental tropical 5)arctic |
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Cold front |
Leading edge of a cooler mass of air, replacing at ground level a warmer mass of air. Has a slope at the surface where this replacement occurs. Fast moving 25mph-30mph |
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Weather with cold front |
Cumulus clouds Turbulence Showers Gusty winds Windows shift Pressure drop then rise |
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Warm front |
Forward edge of an advancing mass of warm air that rises over and replaces a retreating mass of cooler air Move slower than cold 10-25 MPhil Can extend several hundred miles |
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Warm fronts weather |
Stratus clouds Little turbulence Showers ahead of the front Poor visibility in from of haze or fog |
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Stationary front |
Happens when two air masses are pushing against each other but neither is powerful enough to move the other. Have qualities of both cold and warm |
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Weather with stationary fronts |
Low clouds Little turbulence Persistent fog and drizzle Poor visibility in form of haze or fog |
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Occluded front |
Composite front formed when a cold front overtakes a warm front . Two types Cold front occlusions- develops when the faster moving cold front is colder than the air ahead of a slow moving warm front. Cold air replaces warm air and forces the warm air altitude. Needs low pressure to develope |
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Warm front occlusion |
Develops when the air ahead of the slow moving warm front is colder than the air of the fast moving cold front. Warm air replaces cold air and forces the cold air to altitude. Needs low pressure to develop |
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High pressure (anti cylcone) |
Higher pressure than surround areas. Clockwise brings stable weather |
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True north |
On paper. Direction along earth's surface towards geographic north pole. |
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Magnetic north |
Point on surface of earth's northern hemispheres at which the Planets magnetic field points vertically downwards |
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