WX 201 Exam #3 || Verified for Accuracy.
Mid-Latitude Cyclones correct answers Large, low pressure systems that travel great distances
and often bring precipitation and sometimes severe weather to widespread areas
Polar Front Theory correct answers Explanation of the life history of cyclonic storms along the
polar front.
Cyclogenesis correct answers The formation and development of mid-latitude cyclones.
Vorticity correct answers The rotation of a fluid.
Relative Vorticity changes in rotation relative to the surface
Positive Vorticity correct answers Air that spins cyclonically.
(CCW in the Northern Hemisphere CW in the Southern Hemisphere)
Negative Vorticity correct answers Air than spins anticyclonically.
(CW in the Northern Hemisphere CCW in the Southern Hemisphere)
Absolute Vorticity and Components correct answers The overall rotation of air, or its Absolute
Vorticity,
has two components: Relative and Earth Vorticity
Earth Vorticity correct answers Due to Earth's daily rotation about its axis, dragging the
atmosphere with it.
, (Earth vorticity is zero at the equator and increases with latitude)
Earth Vorticity in Northern Hemisphere correct answers In the Northern Hemisphere, Earth
vorticity is positive
because it spins counter-clockwise, Or cyclonically (when looking down at the North Pole).
Earth Vorticity in Southern Hemisphere correct answers In the Southern Hemisphere, Earth
vorticity is positive
because it spins clockwise Or cyclonically (when looking up at the South Pole).
Maximum Vorticity Aloft correct answers Maximum postive vorticity aloft tends to be found in
the deepest part of an upper level trough.
Convergence Aloft (confluence) correct answers Occurs when contour lines move together.
Divergence Aloft (Diffluence) correct answers Occurs when contour lines move apart.
What does Divergence aloft cause? correct answers Divergence aloft, draws air upward from the
surface and provides a lifting mechanism for the intervening column of air.
This can initiate, maintain, or deepen low-pressure systems at the surface.
What does Convergence aloft cause? correct answers Convergence aloft leads to sinking air
and creates, maintains, and increases high pressure at the surface.
A Trough Strengthening Cyclone correct answers When a trough aloft is located to the west
of a surface mid-latitude cyclone, the storm will strengthen.
Mid-Latitude Cyclones correct answers Large, low pressure systems that travel great distances
and often bring precipitation and sometimes severe weather to widespread areas
Polar Front Theory correct answers Explanation of the life history of cyclonic storms along the
polar front.
Cyclogenesis correct answers The formation and development of mid-latitude cyclones.
Vorticity correct answers The rotation of a fluid.
Relative Vorticity changes in rotation relative to the surface
Positive Vorticity correct answers Air that spins cyclonically.
(CCW in the Northern Hemisphere CW in the Southern Hemisphere)
Negative Vorticity correct answers Air than spins anticyclonically.
(CW in the Northern Hemisphere CCW in the Southern Hemisphere)
Absolute Vorticity and Components correct answers The overall rotation of air, or its Absolute
Vorticity,
has two components: Relative and Earth Vorticity
Earth Vorticity correct answers Due to Earth's daily rotation about its axis, dragging the
atmosphere with it.
, (Earth vorticity is zero at the equator and increases with latitude)
Earth Vorticity in Northern Hemisphere correct answers In the Northern Hemisphere, Earth
vorticity is positive
because it spins counter-clockwise, Or cyclonically (when looking down at the North Pole).
Earth Vorticity in Southern Hemisphere correct answers In the Southern Hemisphere, Earth
vorticity is positive
because it spins clockwise Or cyclonically (when looking up at the South Pole).
Maximum Vorticity Aloft correct answers Maximum postive vorticity aloft tends to be found in
the deepest part of an upper level trough.
Convergence Aloft (confluence) correct answers Occurs when contour lines move together.
Divergence Aloft (Diffluence) correct answers Occurs when contour lines move apart.
What does Divergence aloft cause? correct answers Divergence aloft, draws air upward from the
surface and provides a lifting mechanism for the intervening column of air.
This can initiate, maintain, or deepen low-pressure systems at the surface.
What does Convergence aloft cause? correct answers Convergence aloft leads to sinking air
and creates, maintains, and increases high pressure at the surface.
A Trough Strengthening Cyclone correct answers When a trough aloft is located to the west
of a surface mid-latitude cyclone, the storm will strengthen.
