World Geography

Feature Tropical Cyclones Temperate Cyclones  Orgin Thermal orgin Frontal Orgin Latitude 10 – 30 degrees N & S of equator 35 – 65 degree N &S of equator. Formation Only on sea Both land and sea Season Late summers More … Continue reading →

What is it? The systems developing in the mid and high latitude, beyond the tropics are called the middle latitude or extra tropical cyclones. Formation Extratropical cyclones form along the polar front. Initially, the front is stationary. In the northern … Continue reading →

What is it? Tropical cyclones are violent storms that originate over oceans in tropical areas and move over to the coastal areas bringing about large-scale destruction caused by violent winds, very heavy rainfall and storm surges. Conditions for the Formation … Continue reading →

What is it? Front is a three-dimensional boundary zone formed between two converging air masses with different physical properties (temperature, humidity, density, etc. Formation The process of formation of a front is known as Frontogenesis (war between two air masses), … Continue reading →

What is it? Air mass  is a large body of air having nearly uniform conditions of temperature and humidity at any given level of altitude. Such a mass has distinct boundaries and may extend hundreds or thousands of kilometres horizontally. … Continue reading →

What is it? Precipitation refers to all forms of water that fall to the earth from the atmosphere. Conditions for precipitation to form The atmosphere must have moisture. There must be sufficient nuclei present to aid condensation. Weather conditions must … Continue reading →

Clouds Definition: A cloud is an accumulation or grouping of tiny water droplets and ice crystals that are suspended in the earth’s atmosphere. Formation: Clouds are formed when the air becomes saturated or filled, with water vapour. The warm air … Continue reading →

Permanent Winds or Primary Winds or Prevailing Winds or Planetary Winds What is it? Planetary or permanent winds blow from high-pressure belts to low-pressure belts in the same direction throughout the year.  They blow over a vast area of continents … Continue reading →

Wind The wind is the movement of air caused by differences in air pressure in our atmosphere. High-pressure air flows toward low-pressure areas. The greater the pressure difference, the faster the air flows. Winds also cause heat exchange between the … Continue reading →

Hadley Cell The cell is located between 10-30 degree latitudes in both hemispheres.  This is a thermally induced cell and is the result of intense solar insolation. The intense insolation produces rising air along the equator.  The rising air cools … Continue reading →