Geography Notes for UPSC

Major climatic types of India based on Koeppen’s scheme

Koeppen’s scheme is based on the monthly values of temperature and precipitation. Koeppen identified five major climatic types—tropical climates, dry climates, warm climates, snow climates and ice- climates. He used letter symbols A, B, C, D and E to denote these climatic types. Tropical climates: Where mean monthly temperature throughout the year is over 18°C. […]

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Geography Notes for UPSC

Distribution of Rainfall

The annual rainfall of India varies across regions. The height of the Western Ghats and the Eastern Himalayas prevent the moisture-rich winds from entering into the mainland interior and central India. This results in a dry climate in these regions. The average annual rainfall in India is about 125 cm, but it has great spatial

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Geography Notes for UPSC

Season of Retreating Monsoon

Retreating monsoon season commences with the beginning of the withdrawal of the south-west monsoon and lasts till early January. It is a 3-month long process where it starts from the peninsula in October and from the extreme south-eastern tip by December. The retreating southwest monsoon season is marked by clear skies and rise in temperature.

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Geography Notes for UPSC

Characteristics of Monsoonal Rainfall

Monsoon is the general term for the seasonal reversing wind accompanied with the predominantly rainfall during the summer months. Monsoonal rain is mainly precipitated over west coast, Bay of Bengal and adjoining areas. This type of rainfall is heavily governed by topographic interference. The regions of maximum precipitation vary with seasonal progress of the monsoon

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Geography Notes for UPSC

Monsoon Winds of the Bay of Bengal

The Bay of Bengal branch is the most active one in the monsoon season. This branch strikes the coast of Myanmar and part of Bangladesh. The Arakan Hills, however, deflect a big portion of this branch towards India. The monsoon, therefore, enters West Bengal and Bangladesh from south and southeast instead of from the south-westerly

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Geography Notes for UPSC

Monsoon Winds of the Arabian Sea

Over the Arabian Sea, monsoon winds alternately blow from the northeast and the southwest, reversing their dominant direction with the seasons. In the winter, the winds blow from Southwest Asia toward the sea. The monsoon winds originating over the Arabian Sea further split into three branches: It’s one branch is obstructed by the Western Ghats.

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Geography Notes for UPSC

The Southwest Monsoon Season

The southwest monsoon season is considered the most critical and significant season of the year to the people of India. This is because it brings relief from the scorching heat of the hot summer. Increase of temperature in May over the northwestern plains, the low pressure conditions over there get further intensified. By early June,

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Geography Notes for UPSC

The Hot Weather Season

They are highly known for their wide range of extreme weather conditions. It can be both chilly and chilly like the winters or it could be completely hot like in summers. Hot weather season is usually accompanied by dust storms that pick up pace as winds blow. They move at an incredible speed causing huge

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Geography Notes for UPSC

The Cold Weather Season:

November is the beginning of the cold weather season of north India. December and January are considered to be the coldest months in the northern plain. The temperature usually dips below freezing point in these two months. There are three main reasons for the excessive cold in north India during this season: States like Punjab,

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Geography Notes for UPSC

The Rhythm of Seasons

The different climatic conditions prevalent in India are basically dependent on the seasonal changes in the temperature, rainfall, humidity etc. The climatic conditions of India can best be described in terms of an annual cycle of seasons. The climatic conditions of India can best be described in terms of an annual cycle of seasons. The

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