UPSC  >  Winds - Notes

Winds - Notes Notes | Study Geography for UPSC 2023 (Pre & Mains) - UPSC

Document Description: Winds - Notes for UPSC 2022 is part of Geography for UPSC 2023 (Pre & Mains) preparation. The notes and questions for Winds - Notes have been prepared according to the UPSC exam syllabus. Information about Winds - Notes covers topics like and Winds - Notes Example, for UPSC 2022 Exam. Find important definitions, questions, notes, meanings, examples, exercises and tests below for Winds - Notes.

Introduction of Winds - Notes in English is available as part of our Geography for UPSC 2023 (Pre & Mains) for UPSC & Winds - Notes in Hindi for Geography for UPSC 2023 (Pre & Mains) course. Download more important topics related with notes, lectures and mock test series for UPSC Exam by signing up for free. UPSC: Winds - Notes Notes | Study Geography for UPSC 2023 (Pre & Mains) - UPSC
``` Page 1

WINDS:
? The air in motion is called wind.
? Pressure differences force winds to flow from high pressure are to
low pressure area. Pressure differences in turn are caused by unequal
heating of the earth’s surface by solar radiation.
? The wind blows from high pressure to low pressure.
? Winds balance uneven distribution of pressure globally.
? Winds help in transfer of heat, moisture etc. from one place to
another.

FACTORS AFFECTING THE WIND VELOCITY

? The rate of change of pressure with respect to distance is the pressure
? The pressure gradient is strong where the isobars are close to each
other and is weak where the isobars are apart.
? The pressure-gradient force is the force that results when there is a
difference in pressure across a surface.
FRICTIONAL FORCE
? The irregularities of the earth’s surface offer resistance to the wind
movement in the form of friction.
? It is greatest at the surface and its influence children extends upward
elevation of 1 - 3 kilometre.
? Over the sea surface the friction is minimum.

CORIOLIS FORCE
Page 2

WINDS:
? The air in motion is called wind.
? Pressure differences force winds to flow from high pressure are to
low pressure area. Pressure differences in turn are caused by unequal
heating of the earth’s surface by solar radiation.
? The wind blows from high pressure to low pressure.
? Winds balance uneven distribution of pressure globally.
? Winds help in transfer of heat, moisture etc. from one place to
another.

FACTORS AFFECTING THE WIND VELOCITY

? The rate of change of pressure with respect to distance is the pressure
? The pressure gradient is strong where the isobars are close to each
other and is weak where the isobars are apart.
? The pressure-gradient force is the force that results when there is a
difference in pressure across a surface.
FRICTIONAL FORCE
? The irregularities of the earth’s surface offer resistance to the wind
movement in the form of friction.
? It is greatest at the surface and its influence children extends upward
elevation of 1 - 3 kilometre.
? Over the sea surface the friction is minimum.

CORIOLIS FORCE

? The rotation of the earth about its axis affects the direction of the
wind.
? It deflects the wind to the right direction in the northern hemisphere
and to the left in the southern hemisphere.
? The Earth rotates faster at the Equator than it does at the poles.
? The Coriolis force is directly proportional to the angle of latitude. It is
maximum at the poles and is absent at the equator.

NOTE:
JUST TO REMEMBER
When you go up ;  relative to the ground ; you move ahead of everything
else.
When u come back to the equator u fall behind.

EFFECTS OF THE CORIOLIS FORCE:

? The direction of ocean currents is determined by the Coriolis
force.
? The wind blows in the direction determined by the Coriolis force.
? In the northern hemisphere, wind passing from high-pressure
belt to low-pressure belt turns towards the right. This creates
anti-clockwise hurricanes.
Page 3

WINDS:
? The air in motion is called wind.
? Pressure differences force winds to flow from high pressure are to
low pressure area. Pressure differences in turn are caused by unequal
heating of the earth’s surface by solar radiation.
? The wind blows from high pressure to low pressure.
? Winds balance uneven distribution of pressure globally.
? Winds help in transfer of heat, moisture etc. from one place to
another.

FACTORS AFFECTING THE WIND VELOCITY

? The rate of change of pressure with respect to distance is the pressure
? The pressure gradient is strong where the isobars are close to each
other and is weak where the isobars are apart.
? The pressure-gradient force is the force that results when there is a
difference in pressure across a surface.
FRICTIONAL FORCE
? The irregularities of the earth’s surface offer resistance to the wind
movement in the form of friction.
? It is greatest at the surface and its influence children extends upward
elevation of 1 - 3 kilometre.
? Over the sea surface the friction is minimum.

CORIOLIS FORCE

? The rotation of the earth about its axis affects the direction of the
wind.
? It deflects the wind to the right direction in the northern hemisphere
and to the left in the southern hemisphere.
? The Earth rotates faster at the Equator than it does at the poles.
? The Coriolis force is directly proportional to the angle of latitude. It is
maximum at the poles and is absent at the equator.

NOTE:
JUST TO REMEMBER
When you go up ;  relative to the ground ; you move ahead of everything
else.
When u come back to the equator u fall behind.

EFFECTS OF THE CORIOLIS FORCE:

? The direction of ocean currents is determined by the Coriolis
force.
? The wind blows in the direction determined by the Coriolis force.
? In the northern hemisphere, wind passing from high-pressure
belt to low-pressure belt turns towards the right. This creates
anti-clockwise hurricanes.

? In the southern hemisphere due to the Coriolis force, the wind
moves towards the left direction creating clockwise storms.
? The long distance flights face the Coriolis force and hence the
earth’s rotation is taken into account to determine the direction
of flight. Therefore the flights between two cities never travel in a
straight line even if the cities are located on the same latitude.
? Same is the case with rockets, the rockets are launched towards
the eastern direction generally near the equator, so that they do
not get affected by the Coriolis force.
? Same is the case with satellites ( but only with the equatorial
ones).
? Military aircraft also determine the impact of the Coriolis force
before the launch because if the missiles come under the
influence of the Coriolis force, they may land up on a different
target.

```

Geography for UPSC 2023 (Pre & Mains)

100 videos|76 docs
 Use Code STAYHOME200 and get INR 200 additional OFF

Geography for UPSC 2023 (Pre & Mains)

100 videos|76 docs

How to Prepare for UPSC

Read our guide to prepare for UPSC which is created by Toppers & the best Teachers

Track your progress, build streaks, highlight & save important lessons and more!

,

,

,

,

,

,

,

,

,

,

,

,

,

,

,

,

,

,

,

,

,

;