Term
| Air Pressure Arises From What? |
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Definition
| The weight of overlying atmosphere. |
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Term
| What Does Higher Pressure Correspond To? |
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Definition
| More Air Molecules In The Air Column |
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Term
| Pressure Always Decreases In What Direction From The Surface? |
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Definition
| Upward Vertically Upward From The Surface |
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Term
| Pressure Varies In What Way By A Small Percentage Over Great Distances? |
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Definition
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Term
| At Constant Density, Pressure Increases With What, And At Constant Pressure Density Increases With What? |
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Definition
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Term
| In general, what three variables have no universal relationship between any two variables? |
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Definition
| Density, Pressure and Temperature. |
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Term
| How Do Mercury Barometers Work? |
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Definition
| Rely On The Weight Of The Atmosphere To Lift A Column Of Mercury To A Height That Reflects Prevailing Pressure. |
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Term
| How Do Aneroid Barometers Work? |
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Definition
| Use Compression And Expansion Of A Metal Chamber To Sense Variations In Pressure |
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Term
| Surface Pressure Largely Follows What? |
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Definition
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Term
| High Elevations Have Lower Pressure Than What Locations? |
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Definition
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Term
| In the upper atmosphere pressure decreases when moving from what areas? |
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Definition
| From warm areas to cold areas. |
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Term
| Isobaric Heights Decrease When Moving Toward What Locations? |
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Definition
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Term
| Why In A Cold Air Column Pressures Aloft Are Usually Lower Than At The Same Altitude In A Warm Column? |
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Definition
| Cold Air Is Denser Than Warm Air |
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Term
| Isobaric Surfaces Slope Downward From What Toward What? |
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Definition
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Term
| How Are Pressure Gradients Aloft Mapped? |
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Definition
| Using The Height Of Standard Pressure Surfaces. |
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Term
| What gives rise to winds? |
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Definition
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Term
| The Coriolis Force Deflects Wind In What Direction In The Northern Hemisphere? |
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Definition
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Term
| The Coriolis Force Deflects Wind In What Direction In The Southern Hemisphere? |
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Definition
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Term
| What opposes the direction of motion and slows wind? |
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Definition
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Term
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Definition
| Thermal energy released or absorbed, by a body or a thermodynamic system, during a constant-temperature process — usually a first-order phase transition. |
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Term
| Friction is important in the lowest few kilometers of the atmosphere, but not where? |
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Definition
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Term
| Near the surface, winds cross what? |
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Definition
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Term
| Above the friction layer, wind is parallel to what? |
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Definition
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Term
| What causes expansion and contraction of air columns, leading to pressure gradients? |
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Definition
| Differences In Heating And Cooling |
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Term
| Differences In Heating And Cooling, Are Often Expressed As Low Level Features In The Form Of What? |
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Definition
| Cyclones At Low Levels And Troughs Aloft |
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Term
| What Are The Corresponding High Pressure Features Of Cyclones And Troughs? |
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Definition
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Term
| What are used near the surface to capture both wind direction and speed? |
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Definition
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Term
| What are used to track winds aloft and launched twice a day by weather agencies throughout the world? |
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Definition
| Balloons (Rawinsondes and Radiosondes) |
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Term
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Definition
| Force per unit area exerted against a surface by the weight of the air above that surface. |
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Term
| What Do We Use To Measure Pressure? |
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Definition
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Term
| How Many Milibars Is A Hectopascal? |
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Definition
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Term
| What Is The Average Atmospheric On Earth? |
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Definition
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Term
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Definition
| The Mean Atmospheric Pressure At Sea Level |
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Term
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Definition
| Current Atmospheric Pressure At The Altitude Being Measured |
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Term
| How Many Milibars Is A High Pressure System? |
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Definition
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Term
| What Is The Highest Atmospheric Pressure Recorded? |
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Definition
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Term
| What Is The Lowest Atmospheric Pressure Recorded? |
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Definition
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Term
| Surface Data Maps Of Atmospheric Pressure Code Their MSL In What Way? |
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Definition
| They Drop the 10 at the beginning and the decimal, so 1020.7 becomes 207. |
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Term
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Definition
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Term
| Define Pressure Gradients |
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Definition
| Depict Rate Of Change In Pressure |
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Term
| The strength of pressure gradients are indicated by the spacing of what? |
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Definition
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Term
| The strength of pressure gradient force determines what? |
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Definition
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Term
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Definition
| Tighter Pressure Gradient |
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Term
| Tighter Pressure Gradient = |
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Definition
| Stronger Pressure Gradient Force |
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Term
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Definition
| Relaxed Pressure Gradient |
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Term
| Relaxed Pressure Gradient = ? |
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Definition
| Weaker Pressure Gradient Force |
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Term
| Stronger Pressure Gradient Force = ? |
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Definition
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Term
| Weaker Pressure Gradient Force = ? |
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Definition
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Term
| The Coriolis Force Arises From What? |
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Definition
| The Rotation Of The Earth |
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Term
| Define The Coriolis Force |
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Definition
| Force of Earth's rotation that deflects freely moving objects from their path of motion. |
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Term
| Due To The Coriolis Force, You Are Moving Faster When You Are Where? |
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Definition
| Farther From The Poles And Closer To The Equator |
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Term
| Longer Something Is In The Air And The Farther The Distance = ? |
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Definition
| The Stronger The Coriolis Force On That Object |
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Term
| Coriolis Force Is Necessary To Get A Hurricane To Do What? |
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Definition
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Term
| Coriolis Force Impacts What? |
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Definition
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Term
| Pressure Gradient Impacts What? |
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Definition
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Term
| Pressure Gradient Force Works Parallel or Across The Isobars? |
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Definition
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Term
| Winds Works Parallel Or Across The Isobars? |
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Definition
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Term
| How does wind blow around high pressure? |
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Definition
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Term
| How does wind blow around low pressure? |
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Definition
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Term
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Definition
| The balance of Coriolis force and pressure gradient force, in which air blows parallel to your isobars. |
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Term
| Geostrophic Wind is only valid for what kind of flow? |
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Definition
| Straight line flow, with no curvature, but also when very high in altitude. |
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Term
| Define Centripetal Acceleration |
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Definition
| Every time something is changing direction, there is a force that is pushing in. |
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Term
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Definition
| The opposing force to Centripetal Force that pushes out. |
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Term
| When Do Centripetal Acceleration And Centrifugal Force Matter? |
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Definition
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Term
| Why does curved flow cause air to accelerate, make it follow a curved path and makes direction perpendicular to the air motion and towards the center of a curved path? |
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Definition
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Term
Which of these forces apply to a Tornado?
-Pressure Gradient Force
-Coriolis Force
-Centripetal Acceleration
-Centrifugal Force |
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Definition
| Pressure Gradient Force and Centrifugal Force |
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Term
Which is a closer approximation of real wind and produces Centripetal Force?
Geostrophic Wind or Gradient Wind |
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Definition
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Term
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Definition
| Radial force required to keep an object moving in a circular path, that acts on a body moving in a circular path and is directed toward the center around which the body is moving. |
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Term
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Definition
| Circular flow around low pressure center, where pressure gradient force is greater than Coriolis force, the wind speed around the low is sub-geostrophic. |
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Term
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Definition
| Slower than windspeed in Geostrophic flow with same PGF. |
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Term
| In the eye of spinning storms like Hurricanes and Tornadoes are what? |
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Definition
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Term
| Define Anti-Cyclonic Flow |
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Definition
| Circular flow around high pressure center, where Coriolis force is greater than PGF, the wind speed around that high is Super-Geostrophic. |
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Term
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Definition
| Greater than wind speed in geostrophic flow with the same PGF. |
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Term
| When does Friction become negligible for wind? |
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Definition
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Term
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Definition
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Term
| Without friction, air blows in what direction in relation to the isobars? |
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Definition
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Term
| Air always wants to flow from high pressure to what? |
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Definition
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Term
| With friction, air blows in what way in relation to the isobars? |
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Definition
| It flows across the isobars at an angle of about thirty degrees off from parallel. |
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