Test Yourself 06
Test Yourself 06 ATMO 170A1 - 004
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This 4 page Study Guide was uploaded by Sam Barbee on Monday October 5, 2015. The Study Guide belongs to ATMO 170A1 - 004 at University of Arizona taught by Steven Mullen in Summer 2015. Since its upload, it has received 138 views. For similar materials see Introduction to Weather and Climate in General Science at University of Arizona.
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Date Created: 10/05/15
ATMO 170 Test Yourself Chapter 06 l A usually indicates clearing weather or fair weather Steadily rising pressure 2 A gradient wind blowing around the lowpressure center is constantly accelerating because it is constantly changing directions This acceleration is called centripetal acceleration 3 A ridge on an upperair isobaric chart indicates Higher thanaverage heights 4 A surface low pressure center is generally associated with on an upperair isobaric chart A trough to its west 5 A wind blowing at a constant speed parallel to straight line isobars with the pressure gradient force PGF and the Coriolis force in balance is called a geostrophic wind 6 A wind that blows at a constant speed parallel to curved isobars or contour lines is called a gradient wind 7 An object is falling at constant speed The net force is upward 8 Atmospheric pressure changes more rapidly in the vertical direction than in the horizontal 9 Cyclonic ow means in either the Northern or Southern Hemisphere circulation around a low pressure center 10 If the earth39s gravitational force were to increase atmospheric pressure at the ground would Increase 11 In the vertical the pressure gradient force points and gravity points away from the earth toward the earth 12 A station at an altitude of 900 m about 3000 feet above sea level measures an air pressure of 930 mb Under normal conditions which of the values below do you think would be the most realistic sea level pressure for this station 1020 mb 13 Low on a constant height chart corresponds to low on a constant pressure chart pressures heights 14 Net convergence of air would cause surface pressure to and net divergence would cause surface pressure to increase decrease 15 On an isobaric surface pressure is constant 16 On an isobaric weather chart the spacing of the height contours indicates the magnitude of the force pressure gradient 17 On an upperlevel chart the wind tends to blow parallel to the isobars or contours 18 On an upperlevel isobaric chart normally we nd warm air associated with heights and cold air associated with heights high low 19 Pressure changes more rapidly in the vertical direction than horizontal 20 The force is the force that causes the wind to blow pressure gradient 2lThe atmosphere around the earth would rush off into space if the vertical pressure gradient force were not balanced by gravity 22 The contour lines drawn on a 500 mb chart are lines of constant altitude 23 The force that would cause a stationary parcel of air to begin to move horizontally is called the pressure gradient force 24 The pressure gradient force is directed from higher pressure toward lower pressure at all places on earth 25 The surface air around a strengthening low pressure area normally while air aloft directly above the surface low normally converges diverges 26 The surface pressures at the bases of warm and cold columns of air are equal Air pressure in the warm column of air will with increasing height than in the cold column decrease more slowly 27 The wind around a surface high pressure center in the Northern Hemisphere blows clockwise and outward from the center 28 Warm air aloft is associated with constant pressure surfaces that are found at altitude than normal and than normal atmospheric pressure aloft higher higher 29We can generally eXpect the air to be above areas of surface low pressure and above areas of surface high pressure rising sinking 30 Which of the following can in uence wind direction Coriolis pressure gradient and centripetal forces all of these 31 Which of the following forces can not act to change the speed of the wind Coriolis force 32 An altimeter is often just an aneroid barometer that has been calibrated to indicate altitude True 33Fast winds at high latitudes produce the strongest Coriolis force True 34 If the earth stopped rotating there would no longer be a Coriolis force True 35 If at your home in the Northern Hemisphere the surface wind is blowing from the northwest then the region of lowest pressure will be to the east of your home True 36 Suppose that the winds aloft are geostrophic and blowing from the north Low pressure is located to the east true 37 Surface winds blow across the isobars at an angle due to the frictional force True 38 The rate of the earth39s rotation determines the strength of the pressure gradient force False 39 The vertical pressure gradient force is directed downward True 40 Winds blow slightly inward around surface low pressure centers in the Southern Hemisphere True The pressure change that occurs over a horizontal distance Pressure gradient An apparent force created by the rotation of the Earth Coriolis force Wind aloft that blows in a straight line at a constant speed parallel to the isobars or contours Geostrophic wind To correctly monitor horizontal changes in air pressure this is the most important correction added to the station pressure Altitude lndicates the percent of time the wind blows from different directions wind rose lnstrument that employs Doppler radar to obtain a vertical profile of wind speed and wind direction Wind profiler The force exerted by air molecules over a given area air pressure Lines of equal pressure isobars The force which balances the vertical pressure gradient force and prevents the atmosphere around the Earth from rushing off into space gravity lnstrument that usually consists of three or more cups anemometer An elongated high pressure area ridge Another name for a large area of low pressure observed in the middle latitudes mid latitude cyclone The unit of pressure most commonly found on a surface weather map millibar Surface wind that blows from land to water offshore wind A wind ow pattern with a strong northsouth trajectory meridional
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