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INTRODUCTION
Monsoon is traditionally defined as a seasonal reversing wind accompanied
by corresponding changes in precipi...
FACTORS AFFECTING MONSOON
•LATITUDE
•ALTITUDE
•PRESSURE AND WINDS- i)Pressure and surface winds
ii)Upper air circulation
i...
LATITUDE:- Latitude is an angle (defined below) which ranges from
0° at the Equator to 90° (North or South) at the poles. ...
THE INDIAN MONSOON
The climate of India is strongly influenced by monsoon winds. The Arabs,
who had also come to India as ...
THE MONSOON SEASONS OF INDIA
The monsoon type of climate is characterized by a distinct seasonal pattern. They are-
The C...
Following the summer and winter seasons,
the rainy season brings ‘advancing monsoon’.
THE ADVANCING MONSOON (THE RAINY
SEA...
THE RETREATING MONSOON
(THE TRANSITION SEASON)
During October-November, with the
apparent movement of the sun towards the
...
DISTRIBUTION OF
RAINFALL
The distribution of rainfall in India is
uneven. While Rajasthan receives less
than 60 cm of rain...
Acknowledgement
The success and final outcome of this project required a lot of
guidance and assistance from many people a...
CONCLUSION
Monsoon has always been an unifying bond for India. The seasonal
alternation of the wind systems and the associ...
This presentation has been completed by:-
R.NO. STUDENTS NAME
01 Abhishek Das
08 Chironjit Chakraborty
09 Deepak Pandit
21...
Monsoon
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ITS FOR CLASS 9 GEOGRAPHY

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Monsoon

  1. 1. INTRODUCTION Monsoon is traditionally defined as a seasonal reversing wind accompanied by corresponding changes in precipitation. It is also described as seasonal changes in atmospheric circulation and precipitation associated with the asymmetric heating of land and sea. Usually, the term monsoon is used to refer to the rainy phase of a seasonally changing pattern, although technically there is also a dry phase. The English word monsoon came from Arabic word mawsim and Hindi word "mausam”. The climate of India is described as ‘monsoon’ type. In Asia, this type of climate is found mainly in the south and the south-east. Despite an overall unity in the general pattern, there are perceptible reasonal variations in climatic conditions within the country.
  2. 2. FACTORS AFFECTING MONSOON •LATITUDE •ALTITUDE •PRESSURE AND WINDS- i)Pressure and surface winds ii)Upper air circulation iii)Western cyclonic disturbances and tropical cyclones
  3. 3. LATITUDE:- Latitude is an angle (defined below) which ranges from 0° at the Equator to 90° (North or South) at the poles. Lines of constant latitude, or parallels, run east-west as circles parallel to the equator. Latitude is used together with longitude to specify the precise location of features on the surface of the Earth. ALTITUDE:- The distance measured perpendicularly from a figure's vertex to the opposite side of the vertex. The perpendicular height of a triangle is known as its altitude. The angular distance of a heavenly body above our Earth's horizon. PRESSURE AND WINDS:- • Pressure is the amount of force exerted per unit of surface area. It always decreases vertically with height and is exerted equally in all directions. • Wind is the perceptible natural movement of the air, especially in the form of a current of air blowing from a particular direction.
  4. 4. THE INDIAN MONSOON The climate of India is strongly influenced by monsoon winds. The Arabs, who had also come to India as traders named this seasonal reversal of the wind system ’monsoon'. The monsoon advances in the early June creating a low-pressure condition over the Northern Plains while during October – November, with the apparent movement of the sun towards the south retreats the monsoon which is marked by clear skies and rise in temperature. It is accompanied by some seasonal winds such as Loo, Mango showers, Kaal-baisakhi.
  5. 5. THE MONSOON SEASONS OF INDIA The monsoon type of climate is characterized by a distinct seasonal pattern. They are- The Cold Weather season(Winter) and The Hot Weather season(Summer). The Cold Weather Season begins from mid-November in northern India and stays till February. December and January are the coldest months in the northern part of India. Days remain warm and nights become cold. Although the total amount of winter rainfall is locally known as ‘mahawat’ is small, they are of immense importance for the cultivation of rabi crops. Due to the apparent northward movement of the sun, the global heat belt shifts northward. As such, from March-May, it is hot weather season in India. The temperature remains 38°C-45°C. During this season strong, gusty dry winds blow blows during the day over the north and north-western India.
  6. 6. Following the summer and winter seasons, the rainy season brings ‘advancing monsoon’. THE ADVANCING MONSOON (THE RAINY SEASON) By the early June, the low-pressure condition over the Northern Plains attracts the trade winds of the southern hemisphere. Early in the season, the windward side of the Western Ghats receives very heavy rainfall, more than 250 cm. now the phenomenon associated with monsoon is its tendency to have ‘breaks’ in rainfall. Thus, it has wet and dry spells. It is often irregular in its arrival and its retreat. Hence, it sometimes disturbs the farming schedule of millions of farmers all over the country. With the season’s arrival, the normal rainfall increases suddenly and continues constantly for several days. This is known as the burst of monsoon.
  7. 7. THE RETREATING MONSOON (THE TRANSITION SEASON) During October-November, with the apparent movement of the sun towards the south, the monsoon trough or the low- pressure trough over the Northern Plains becomes weaker. This is gradually replaced by high-pressure system. The months of October to November forms a period of transition from hot rainy season to dry winter conditions. The retreat of the monsoon is marked by clear skies and rise in temperature. While day temperatures are high, nights are cool and pleasant. Owing to the conditions of high temperature and humidity, the weather becomes rather oppressive during the day. This is commonly known as October heat. The low-pressure conditions over north-western India, gets transferred to the Bay of Bengal by early November due to which the state with its neighboring states are often struck by cyclones.
  8. 8. DISTRIBUTION OF RAINFALL The distribution of rainfall in India is uneven. While Rajasthan receives less than 60 cm of rainfall, Mawsynram being the wettest place on the earth receives around 1200 cm of annual rainfall. To the western part of India, monsoon is to the lowest point due to which the eastern part of India is flooded during the monsoon season. Variations of rainfall even affect the lifestyles of people in the particular regions highly.
  9. 9. Acknowledgement The success and final outcome of this project required a lot of guidance and assistance from many people and we extremely fortunate to have got this all along the completion of our project work. Whatever we have done is only due to such guidance and assistance and we would not forget to thank them. We would not forget to remember our respective subject teacher- Mr. Imran Hussain for his encouragement and more over for his timely support and guidance till the completion of our project work. We are also thankful to and fortunate enough to get constant encouragement, support and guidance from all co-group mates which helped us in successfully completing our project work.
  10. 10. CONCLUSION Monsoon has always been an unifying bond for India. The seasonal alternation of the wind systems and the associated weather condition provide a rhythmic cycle of seasons. The uncertainties of rain and uneven distribution are very much typical of the monsoons. The Indian landscape, its animal and plant life, its entre agricultural calendar and the life of the people including their festivities revolve around this phenomenon. The river valleys which carry this water also unites as a single river valley unit
  11. 11. This presentation has been completed by:- R.NO. STUDENTS NAME 01 Abhishek Das 08 Chironjit Chakraborty 09 Deepak Pandit 21 Khushboo Somani 27 Mehnaz Naseem 29 Muquaddisa Sabreen 32 Preksha Gattani 39 Shreya Ghosh 40 Sunil Pandit

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ITS FOR CLASS 9 GEOGRAPHY

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