Atmospheric pressure and winds - class-XII

R.K. Pachauri served as the chairman of the Intergovernmental Panel on Climate Change (IPCC) from 2002 to 2015.

South-West monsoon has two branches, 1. Arabian sea branch, 2. Bay of Bengal branch. The moisture ladden winds of the SW monsoon follow the path of low pressure zone so as to reach ITCZ which is at ganga plains due to northward march of Sun over the tropic of cancer. While flowing towards ITCZ the Arabian Sea branch gets obstructed by the Western ghats, this gives heavy orographic rainfall on Western coast. On the other hand the bay of Bengal branch flows parallel to eastern ghats, so there is less precipitation.

As the distance from the sea increases, people experience extreme weather conditions, i.e., very hot during summers and very cold during winters. This condition is known as Continentality.

Cyclone is a natural calamity. It is a storm characterised by a low barometric centre and thunder storms, resulting in strong winds and eventually flooding rains. Even when the cyclone is very far, strong winds push water towards the shore causing huge water waves.

Among the four places, Puri is the most likely to experience cyclones, it is due to its geographical location low pressure is easily created. Therefore high air pressure comes in great speed, it creates cyclones. Recently it witnessed cyclone Fanni.

The above statement is incorrect. Wind is the flow of gases on as large scale.

A barometer measures atmospheric pressure changes, which help predict weather conditions. Rising pressure typically indicates fair weather, while falling pressure suggests storms approaching. Temperature is measured by a thermometer, rainfall by a rain gauge, and wind direction by an anemometer or weather vane.

The above statement is incorrect. Winds are light at the equator because of the weak horizontal pressure gradients located there.

The correct option is (B).Wind consist of bulk movement of air.

Isobars are lines drawn on a weather map connecting points of equal atmospheric pressure.

The Doldrums, or Intertropical Convergence Zone (ITCZ), is a low-pressure belt near the equator characterized by calm winds and rising air.

A numerical scale for relating wind speed and sea state, devised by the British Admiral Sir Francis Beaufort in 1805. Beaufort numbers (or forces) range from force 0 (calm) to force 12 (hurricane). Sometimes (and originally) called the Beaufort scale of wind forces.

A numerical scale for relating wind speed and sea state, devised by the British Admiral Sir Francis Beaufort in 1805. Beaufort numbers (or forces) range from force 0 (calm) to force 12 (hurricane). Sometimes (and originally) called the Beaufort scale of wind forces.