Table of Contents
- 1 Why does the pressure over continents change with the seasons?
- 2 How does ITCZ change with seasons?
- 3 How does the seasons affect the weather?
- 4 What are large scale movements of air called?
- 5 Why do you think that the ITCZ shifts to the north in July and shifts to the south in January?
- 6 Why does ITCZ shift towards Ganga plains in summer?
- 7 How do plant and animal cells respond to pressure changes?
- 8 What are the drawbacks of the Halley’s theory of monsoons?
Why does the pressure over continents change with the seasons?
The oceans react far more slowly and during the summer they are cooler than the adjoining land, whilst in summer they are warmer. This effect of the Earth’s surface is to produce relatively high pressure over cold areas and low pressure over warmer ones, producing large modifications to the wind belts.
Where do the large-scale atmospheric circulation cells shifts in warmer periods?
The large-scale atmospheric circulation “cells” shift polewards in warmer periods (for example, interglacials compared to glacials), but remain largely constant as they are, fundamentally, a property of the Earth’s size, rotation rate, heating and atmospheric depth, all of which change little.
How does ITCZ change with seasons?
The ITCZ follows the sun in that the position varies seasonally. It moves north in the Northern Hemisphere summer and south in the Northern Hemisphere winter. Therefore, the ITCZ is responsible for the wet and dry seasons in the tropics.
Where does the ITCZ shift during summer and why?
The location of ITCZ shifts north and south of equator with the change of season. In the summer season, the sun shines vertically over the Tropic of Cancer and the ITCZ shifts northwards.
How does the seasons affect the weather?
During the summer, the Northern Hemisphere will tilt towards the Sun resulting in more direct sun radiation and higher temperatures. During the winter, the Northern Hemisphere is tilting away from the Sun with less direct sun radiation as a result and the temperature will therefore be lowers.
Why is air pressure higher in winter?
In the winter, barometric pressure is often higher than the summer since cold air is denser than warm air.
What are large scale movements of air called?
Large scale air movements of this nature are called Katabatic winds. On a global scale, the same principle of temperature difference operates to develop the major wind belts.
Which of the following factors control the large scale patterns of circulation in the atmosphere?
Large-scale circulation in Earth’s atmosphere below the tropopause is caused by the combination of two factors: uneven heating from the sun and Earth’s rotation. The Hadley cell is the primary circulation cell in the atmosphere.
Why do you think that the ITCZ shifts to the north in July and shifts to the south in January?
The ITCZ shifts position over the course of the year since the sun’s direct rays on the earth vary over the course of a year. Thus, the ITCZ will be located north of the equator in the Northern Hemisphere summer and south of the equator in the Northern Hemisphere winter.
How does the shifting ITCZ influence the monsoons?
That’s where rain is produced as warm and humid air rises in the Intertropical Convergence Zone (ITCZ), which swings north and south in a seasonal cycle, causing patterns of distinctly wet and dry seasons (explore Why Monsoons Happen to learn more about how this works).
Why does ITCZ shift towards Ganga plains in summer?
Explanation: Ganga plain in summers shifts the equatorial through which is normally positioned about five degree north of the equator is also known as the monsoon through during the ‘monsoon season’. That is the biggest reason for “Inter Tropical Convergence Zone” shift of position in summer over Ganga plain.
Why are the seasons shifting?
How are Seasons Shifting? Shifting seasons are directly linked to warmer global temperatures. A slight change in temperature is enough to push the spring thaw earlier, and delay the first frost until later in the fall. As a result, winters are shorter, spring is earlier, summers are longer and fall arrives later.
How do plant and animal cells respond to pressure changes?
Plant cells and bacterial cells have walls that make them somewhat resistant to a certain amount of pressure. Animal cells do not have walls, just membranous envelopes, so they are less able to withstand pressure. The most common pressure changes occur as a result of changes in water volume. Water follows solute.
How do large-scale atmospheric circulation patterns change with climate change?
The large-scale atmospheric circulation “cells” shift polewards in warmer periods (for example, interglacials compared to glacials), but remain largely constant as they are, fundamentally, a property of the Earth’s size, rotation rate, heating and atmospheric depth, all of which change little.
What are the drawbacks of the Halley’s theory of monsoons?
Drawbacks: The monsoons do not develop equally everywhere on earth and the thermal concept of Halley fails to explain the intricacies of the monsoons such as the sudden burst of monsoons, delay in on set of monsoons sometimes, etc.. According to this theory, the monsoon is simply a modification of the planetary winds of the tropics.
Why do Hadley cells exist in both the northern and southern hemispheres?
Those cells exist in both the northern and southern hemispheres. The vast bulk of the atmospheric motion occurs in the Hadley cell. The high pressure systems acting on the Earth’s surface are balanced by the low pressure systems elsewhere. As a result, there is a balance of forces acting on the Earth’s surface.