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setting - Energy and also Latitude

This is Antarctica. What season is this? i beg your pardon is night and also which is day?

The sunlight is constantly up, even in the center of the night in Antarctica throughout the summer. The photograph on the left is Antarctica during the night in the summer. The photo on the right is Antarctica during the job in summer. Similarly, in the winter Antarctica is mostly dark every day.

Different parts of Earth’s surface receive different amounts of sunlight. The sun’s beam strike Earth’s surface most directly at the equator. This focuses the light ray on a tiny area. Due to the fact that the rays hit much more directly, the area is boil more. You have the right to see this in the number below. An alert that the earth is tilted on its axis. Because of the Earth’s tilt the sun’s rays strike the surface at a slant in ~ the poles; castle are less focused. This spreads the rays over a large area. Because the sun’s beam hit in ~ a slant, the area is cook less. The an ext focused the beam are, the much more energy an area receives and also the warmer that is; the less concentrated the beam are, the less power an area receives and the cooler the is.

The lowest latitudes obtain the most energy from the sun. The greatest latitudes get the least.

The tilt the the Earth causes different locations to obtain different quantities of solar energy. The distinction in solar power received at various latitudes cd driver atmospheric circulation. Areas that get more solar power have much more heat. Locations that get less solar energy have less heat. The air over the areas receiving much more heat warms up and also rises. The air end the areas receiving less heat is cooler and also so it sinks. The rising warm air and also sinking cool air produce wind which moves air and heat roughly the planet.

Source:Open education Group Textbooks - earth Science

In order to help you recognize this much more clearly, refer to the photo. In this photo, a network of equal dimensions has actually been inserted on a projector screen, superimposed upon a globe. Because of the curvature that the world which represents Earth, the grids space not uniform. Notification at the equator, the grids room proportionally smaller sized than they room at the poles. This to represent the solar radiation being scattered over a better distance in ~ the poles. Notification that at the equator, the grids are not distorted, meaning solar radiation is not scattered close to as much. Due to the fact that of this, the air, ocean, and Earth"s surface ar gets heated at the equator more than at the poles.

If us were to compare these 2 regions, us would uncover that over there is a network loss the solar radiation in the greater latitudes and also a net get in the tropics. This distinction in solar radiation creates a activity of air (wind) from the warmer tropical regions toward the cooler northern and also southern regions, the poles. See figure 2.


This relocating air create oceanic surface currents the moves the water in the exact same direction together the wind, that is, currents native the equator and tropics move heat water northward toward higher latitudes, and also currents native the poles relocate cooler water southward toward reduced latitudes. Currently think about this, carry out winds within the area whereby you live punch from the north toward the south or south toward the north? If you analysis wind patterns where friend live, you more than likely will discern the the winds normally have a westerly or one easterly ingredient to the north-south directions, i.e. Northwest, southeast, southwest, west southwest, etc. What is the factor for this? Why don"t winds blow just north and also south, moving the s currents north and also south follow to figure 2? an excellent question. Research will help carry out the answer.


A many the solar power that reaches earth hits the equator. Much less solar power gets to the poles. The difference in the amount of solar energy drives atmospheric circulation.

Practice use this resource to price the questions that follow.

What is latitude? What go latitude means to the heater of the Earth? Why perform high latitudes receive much less sunlight? What is the angle of incidence?

Answers - to mark the box listed below to check out the answers.

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Latitude is the measure of the street of a location on the planet from the equator. The additional away native the equator that a ar resides, the less sunlight that this ar receives. it all has to do v the form of the Earth. Since the earth is round, just the front most portion receives direct sunlight.


The phibìc Pole receives sunlight 24 hrs a work in the summer. Why does it receive less solar radiation 보다 the equator? What component of earth receives the most solar radiation in a year? What provides the atmosphere move the means it does?

Answers - highlight the box below to watch the answers.

that receives much less solar radiation than the equator due to the fact that the angle of incidence is lot smaller. The sun’s rays execute not to win the Earth’s surface ar as directly at the phibìc Pole; lock are much less focused. The equator obtain the many solar radiation in a year. The distinction in the quantity of solar energy the land receives reasons the atmosphere to relocate the method it does.

Source:Open education Group Textbooks - planet Science