The authors explain how adults» subliminal perceptions of students based on characteristics such as race, class, gender, and demeanor can result in the sorting of students
into updraft and downdraft tracks.
For convection, we could separate the amount of energy transfered vertically
into updrafts and downdrafts.
Not exact matches
Fire whirls arise when superheated air above a wildfire drives strong
updrafts and downdrafts that get sheared by the wind, causing them to twist
into a vortex that funnels flames upward.
11 Roll clouds form when
updrafts and downdrafts churn clouds
into a long, spinning cylinder.
The intensity of the downdrafts and
updrafts is vital, because in the end there needs to be a lot of stretching, which is when you take that existing rotation and turn it
into something really violent like a tornado.
But for a tornado to form, you still need to tilt the rotation
into the vertical, and this requires a nearby
updraft.
The sudden increase in lightning is one sign a normal storm is rapidly evolving
into a supercell, with a large rotating
updraft — or mesocyclone — at its heart.
Supercell thunderstorms occur when the warm
updraft punches through an overlying, stable layer and continues upward
into a zone of cool, dry air.
As the
updraft moves, it rotates; if the rotation grows sufficiently intense, the storm can evolve
into a tornado or funnel cloud (a tornado whose bottom does not touch the ground).
The storms» violent
updrafts sucked in air that shot up 40,000 - 50,000 feet or more
into the atmosphere.
Turbine exhaust steam condensing (to renew the Rankine cycle) conventionally involves wet cooling, where cooling water from the shell - and - tube steam condensers is sprayed
into cooling towers, and an
updraft carries vapor from evaporative cooling
into the atmosphere.
These coupled with the increased intrusion of the tropopause
into the stratosphere appears to cause a change in the saturated adiabatic proccess and allows a greater
updraft resulting in an increase in the fall distance of the condensensing water vapor resulting in high average winds and lower eye pressures.
Anderson and his colleagues start with a new and unexpected observation, based on high - altitude flights and satellite measurements: powerful
updrafts from powerful summer thunderstorms can send moisture much higher
into the stratosphere than anyone had thought.
Every now and then, however, the shear is low and a cluster of thunderstorms joins up and creates a persistent
updraft as warm wet air is pulled
into the low pressure underneath, is lifted up (cooling), and falls back as much cooler rain.