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Atmospheric Circulation and Weather Systems: Introduction Video Lecture | Geography Class 11 - Humanities/Arts

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00:55 Atmospheric Pressure​
03:22 Vertical Variation of Pressure​
04:37 Horizontal Distribution of Pressure​
05:00 Isobars
05:12 Isotherms
06:11 World Distribution of Sea Level Pressure ​
07:08 Forces Affecting the Velocity & Direction of Wind
07:32 Pressure Gradient Force
07:47 Frictional Forces
09:11 General circulation of the atmosphere
12:20 ENSO El Nino Southern Oscillation
18:39 Seasonal winds
19:52 Local Winds
20:14 Land & Sea Breezes
21:51 Mountain & Valley Winds
24:08 Air Masses
25:58 Fronts
More

FAQs on Atmospheric Circulation and Weather Systems: Introduction Video Lecture - Geography Class 11 - Humanities/Arts

1. What is atmospheric circulation and how does it influence weather patterns?
Ans. Atmospheric circulation refers to the large-scale movement of air in the Earth's atmosphere. It is driven by the unequal heating of the Earth's surface by the sun, which creates areas of high and low pressure. This circulation plays a crucial role in determining weather patterns by transporting heat, moisture, and energy across the globe. Winds, storms, and the formation of weather systems such as cyclones and anticyclones are all influenced by atmospheric circulation.
2. How does the Coriolis effect affect atmospheric circulation and weather systems?
Ans. The Coriolis effect is a result of the Earth's rotation and causes moving air or water to be deflected to the right in the Northern Hemisphere and to the left in the Southern Hemisphere. This effect plays a significant role in shaping atmospheric circulation and weather systems. It causes the wind to blow in curved paths rather than in straight lines, leading to the formation of distinct wind patterns such as the trade winds, westerlies, and polar easterlies. The Coriolis effect also influences the rotation and intensity of cyclones and anticyclones.
3. What are the major global wind belts and how do they impact weather systems?
Ans. The major global wind belts are the trade winds, prevailing westerlies, and polar easterlies. The trade winds blow from east to west in the tropical regions, while the prevailing westerlies blow from west to east in the middle latitudes. The polar easterlies blow from east to west near the poles. These wind belts play a crucial role in transporting heat and moisture across the Earth's surface, influencing the formation and movement of weather systems. They help in the redistribution of heat from the equator towards the poles, leading to the development of high and low-pressure systems and the formation of weather fronts.
4. How do weather systems like cyclones and anticyclones form and what are their characteristics?
Ans. Cyclones and anticyclones are two types of weather systems that form due to atmospheric circulation patterns. Cyclones are low-pressure systems characterized by inward spiraling winds and rising air. They are associated with stormy weather conditions, including heavy rain, strong winds, and thunderstorms. Anticyclones, on the other hand, are high-pressure systems characterized by outward spiraling winds and sinking air. They typically bring calm and clear weather conditions. These weather systems form due to the convergence and divergence of air masses, influenced by factors such as temperature gradients, atmospheric pressure, and moisture content.
5. How does atmospheric circulation contribute to the global climate system?
Ans. Atmospheric circulation plays a vital role in the global climate system. It helps in the redistribution of heat from the equator to the poles, regulating temperature patterns across the Earth's surface. The circulation of air masses also transports moisture, which affects precipitation patterns and the distribution of water resources. Additionally, atmospheric circulation influences the formation and movement of weather systems, which can have long-term effects on regional and global climate. Changes in atmospheric circulation patterns, such as shifts in wind belts or alterations in the intensity of cyclones, can impact the climate system and lead to changes in weather patterns and climate conditions.
71 videos|245 docs|44 tests
Video Timeline
Video Timeline
arrow
00:55 Atmospheric Pressure​
03:22 Vertical Variation of Pressure​
04:37 Horizontal Distribution of Pressure​
05:00 Isobars
05:12 Isotherms
06:11 World Distribution of Sea Level Pressure ​
07:08 Forces Affecting the Velocity & Direction of Wind
07:32 Pressure Gradient Force
07:47 Frictional Forces
09:11 General circulation of the atmosphere
12:20 ENSO El Nino Southern Oscillation
18:39 Seasonal winds
19:52 Local Winds
20:14 Land & Sea Breezes
21:51 Mountain & Valley Winds
24:08 Air Masses
25:58 Fronts
More
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