Mechanism of Weather in the Winter and Summer Season

What are the factors that determine the weather of a place?

The factors that determines the weather of a place are : Distribution of air pressure and winds on the surface of the earth.

Upper air circulation caused by factors controlling global weather and the inflow of different air masses and jet streams.

Inflow of western cyclones generally known as disturbances during the winter season and tropical depressions during the south-west monsoon period into India, creating weather conditions favorable to rainfall.

What is the meaning of the term “weather”?

Weather is the momentary state of the atmosphere.

How do surface pressure and winds determine the mechanism of the Winter Season?

Surface pressure and winds determines the mechanism of Winter Season by : In winter months, the weather conditions over India are generally influenced by the distribution of pressure in Central and Western Asia.

A high pressure centre in the region lying to the north of the Himalayas develops during winter.

This centre of high pressure gives rise to the flow of air at the low level from the north towards the Indian subcontinent, south of the mountain range.

The surface winds blowing out of the high pressure centre over Central Asia reach India in the form of a dry continental air mass.

These continental winds come in contact with trade winds over northwestern India. The position of this contact zone is not, however, stable.

Occasionally, it may shift its position as far east as the middle Ganga valley with the result that the whole of the northwestern and northern India up to the middle Ganga valley comes under the influence of dry northwestern winds.

How do Jet Streams and Upper Air Circulation determine the mechanism for the Summer Season?

Jet Streams and Upper Air Circulation determines the mechanism for the Summer Season in the following ways: Easterly Jet Streams flows over the southern part of the Peninsula in June, and has a maximum speed of 90 km per hour. In August, it is confined to 15 Degree North latitude, and in September up to 22 Degree North Latitude.

The easterlies normally do not extend to the north of 30 North Degree Latitude in the upper atmosphere.

What are Jet Streams?

Jet streams are bands of strong wind that generally blow from west to east all across the globe. These are relatively narrow bands of strong wind in the upper levels of the atmosphere.

Point out the factors that determine the climate.

The factors that determines the climate are : Distance from the Sea, Relief, Latitudinal and Longitunal extent and the Himalaya Mountains.

Mechanism of Weather in the Winter and Summer Season: There are variations in weather conditions during different seasons. These changes occur due to weather temperature, pressure, wind direction, velocity, humidity, precipitation, etc.

In this article, we will focus on the weather mechanism during the winter and summer seasons.