Monsoon

🌧️ Monsoon – Full Description

Monsoon is caused by winds that change direction at certain times of the year It is the rain that occurs. Among the major factors that determine the climate of India Monsoon is very important.

📌 Definition

The direction of the wind changes with the season and hence the rainfallMonsooncalled

🌍 Types of Monsoon

• ✔ South-West Monsoon
• ✔ North-East Monsoon

🌧️ 1. Southwest Monsoon

• ✔ From June to September
• ✔ Winds from Arabian Sea and Bay of Bengal
• ✔ It will rain in most parts of India
• ✔ Very important for agriculture

🌦️ 2. Northeast Monsoon

• ✔ From October to December
• ✔ Wind blows from land to sea
• ✔ Main rainy season in Tamil Nadu

⚙️ Causes of Monsoon

• ✔ Heat difference between land and sea
• ✔ Pressure difference
• ✔ Rotation of Earth

🌾 Importance

• ✔ Provides water for agriculture
• ✔ Increases water availability
• ✔ Helps fill rivers and dams

⚠️ Impacts

• ✔ Heavy rain → Flooding
• ✔ Low rainfall → Drought

“What is Monsoon?” in TNPSC Exams, "What is the difference between Southwest and Northeast Monsoon?" Such questions are frequently asked.

🌧️ Rainfall – Full Description

Precipitation is water droplets that form in clouds To fall to the earth as rain. It is an important part of the Earth's Water Cycle.

📌 Definition

The vapor formed in the atmosphere cools and turns into particles falling to earth as rainPrecipitationis called

🌍 Types of Precipitation

• ✔ Convectional Rainfall
• ✔ Mountain Rain (Orographic Rainfall)
• ✔ Cyclonic Rainfall

🌤️ 1. Cycle rain

• ✔ Air rises due to heat
• ✔ It will become cloudy and rain
• ✔ Found in tropical regions

⛰️ 2. Mountain Rain (Orographic Rainfall)

• ✔ Wind rises when it crosses mountains
• ✔ It will be cold and rainy
• ✔ More in Western Ghats

🌪️ 3. Cyclonic Rainfall

• ✔ Formed due to air pressure difference
• ✔ There will be rain due to Cyclone
• ✔ More in coastal areas

🌏 Importance

• ✔ Very essential for agriculture
• ✔ Increases water availability
• ✔ Replenishes ground water

⚠️ Complications

• ✔ Heavy rains → floods
• ✔ Low rainfall → Drought

“What are the types of rainfall?” in TNPSC Exams. "How does orographic rainfall occur?" Questions like

🌤️ Weather – Full description

Weather is observed at a specific place, for a short period of time Indicates the atmospheric condition. The elements of weather are daily temperature, rainfall, wind, humidity etc.

📌 Definition

Atmospheric condition of a place over a short period of timeWeathercalled

🌍 Elements of Weather

• ✔ Temperature
• ✔ Rainfall
• ✔ Wind
• ✔ Humidity
• ✔ Air Pressure

🌦️ Types of weather

• ✔ Sunny
• ✔ Rainy
• ✔ Cloudy
• ✔ Windy

🌏 Weather vs Climate

• ✔ Weather – Short-term
• ✔ Climate – Long-term average

📡 Meteorology

• ✔ Weather Stations
• ✔ Satellites

🌱 Importance

• ✔ Helps in agriculture
• ✔ Helps to plan travel and transportation
• ✔ Helps in early detection of natural calamities

In TNPSC Exams “What is Weather?”, "What is the difference between weather and climate?" Questions like

🌏 Climate – Full description

Climate is the long-term average of a place Indicates the weather condition. Temperature, rainfall, wind etc. recorded over the years Average is climate.

📌 Definition

Long-term (30 years or more) in one location Average weather conditions observedClimatecalled

🌍 Elements of Climate

• ✔ Temperature
• ✔ Rainfall
• ✔ Wind
• ✔ Humidity
• ✔ Air Pressure

🌦️ Factors affecting climate

• ✔ Latitude
• ✔ Altitude
• ✔ Distance from Sea
• ✔ Mountains (Relief)
• ✔ Winds

🌏 Climate of India

• ✔ Monsoon Climate
• ✔ Four seasons are observed:
  • ✔ Winter
  • ✔ Summer
  • ✔ Southwest Monsoon
  • ✔ Northeast Monsoon

🌏 Climate vs Weather

• ✔ Climate – long term
• ✔ Weather – short term

🌱 Importance

• ✔ Determines agriculture
• ✔ Affects human life
• ✔ Helps to understand environmental changes

“What is Climate?” in TNPSC Exams. “What is the climate type of India?” Such questions are frequently asked.