As a result, atmospheric circulation
moves warm tropical air to the polar regions and cold air from the poles to the equator.
Cold weather from the Arctic combined
with warm tropical air fueled a storm that produced well over a foot of snow and spots of flooding in Boston.
Scientists say the record drought is due in part to the expansion of the Hadley Cell — the atmospheric regions on both sides of the equator that
circulates warm tropical air poleward — which is known climate change signal.
According to the three researchers, ENSO - related warming during El Niño conditions is caused by a stronger Hadley Cell circulation moving
warm tropical air into the mid-latitudes.
When polar air dipping southward collides with
rising warm tropical air, the meet - up causes a powerful atmospheric wave with rollercoaster - like patterns that propagate eastward around the globe.
One reason for this was jet stream patterns that
pushed warm tropical air up into Alaska and nudged colder Arctic air down into the continental United States.
These phenomena develop along the polar front, which separates colder polar air
from warmer tropical air, when sufficiently large temperature differences occur across the frontal boundary in the lower troposphere.
In mid-latitudes, the most violent weather occurs when cold polar air and
warm tropical air meet, which often creates strong frontal storms and tornados.
Cold fronts carried by this airstream then interact
with warm tropical air and form cloud banks over northwestern Australia, which travel across the country towards the southeast bringing winter rain.
Grab one of the plush blue loungers surrounding the in - ground pool and soak in the sun and
warm tropical air.
The unique village of Trinity Beach is yours to enjoy, Award winning restaurants Al Fresco dining sit, relax, and unwind in
the warm tropical air.
The warm tropical air and the guidance of your instructor will provide immediate benefits in the way you feel about yourself.
The covered deck features a lounge area with wicker furnishings and a dining table to enjoy an alfresco meal in
the warm tropical air.
Take in
the warm tropical air while resting on comfy lounge chaises that look over the transcending colors of the lagoon and distant sea.
Enjoy an outdoor cinema in
the warm tropical air.
The reason they occur in the middle latitudes is because they occur at the boundary between cold polar air and
warmer tropical air.
It was caused by a weather front with
a warm tropical air mass (it is currently high summer in South America) moving southward and meeting a somewhat cooler air mass.
The boundary between the cold polar air and
the warm tropical air is called the Polar Front.
Large planetary waves (Rossby Waves) form along the boundary between cold polar air and
warm tropical air.
The warm tropical air hitting cold northern air makes a lot of water condense and fall.
This somewhat migratory zone was the Silurian intertropical convergence zone (ITCZ), where the convergence of Northern and Southern Hemispheric trade winds caused
the warm tropical air to rise, which in turn produced regular cloud cover and precipitation.
Figure 2 shows the Polar Front as a simple division of the atmosphere between cold polar and
warm tropical air.
One of the largest contact zones is the Polar Front between cold polar air and
warm tropical air.