Why does the equator receive less insolation?
Equator receives comparatively less insolation than the tropics due to presence of clouds. Generally, at the same latitude the insolation is more over the continent than over the oceans because more clouds over the oceans reflect sun rays back into space.
How does season affect insolation?
The angle of insolation changes throughout the year because Earth's tilt stays the same as Earth orbits the Sun. When the Earth is near its perihelion, it is winter in the Northern Hemisphere and summer in the Southern Hemisphere.
Why the amount of insolation at the poles and the equator is different?
As you can see above, because of the curve of the Earth a sunbeam of Insolation hitting the Earth at higher latitudes has to spread out over a larger surface area than one reaching the Equator. Thus lowering the amount of Insolation per km2 in more Northerly and Southerly latitudes.
What latitude receives the least insolation?
December 21st=lowest angle of insolation=lowest solar intensity=shortest path of sun=sun directly overhead at 23.5 South of equator. Warmest Time of Year for the Northern Hemisphere…..
Why is insolation greatest at the equator?
Annual insolation is very high at the Equator because the Sun passes directly overhead at noon every day throughout the year. Annual insolation at the poles is zero because the Sun's rays always skirt the horizon.
Why is insolation lower at higher latitudes?
At higher latitudes, the angle of solar radiation is smaller, causing energy to be spread over a larger area of the surface and cooler temperatures.
In which month is the duration of insolation the longest?
June 21st Maximum insolation occurs in the Northern Hemisphere around June 21st (Summer Solstice). 3. Maximum Surface temperature occur at the Earth's surface after the maximum duration of insolation.
What causes it to be colder in the winter and warmer in the summer in the northern hemisphere?
As the earth travels around the sun in its 365-day journey, some parts of the surface point directly at the sun at different times. When the northern hemisphere is pointed toward the sun, sunlight hits more directly, and it warms up this part of the earth.
Why is insolation highest at the equator?
Annual insolation is very high at the Equator because the Sun passes directly overhead at noon every day throughout the year. Annual insolation at the poles is zero because the Sun's rays always skirt the horizon.
At which location does insolation vary most between June and December?
2. When the polar region of the Northern Hemisphere is reflecting the maximum amount of sunlight (the June solstice), it doesn't reflect nearly as much light as the polar region of the Southern Hemisphere when it reflects its maximum amount of sunlight (December solstice).
How does the angle of insolation vary from December 21 to June 21 in the Northern Hemisphere?
The declination angle (δ) currently varies between +23.45° at northern summer solstice (June 21) to –23.45° at northern winter solstice (December 21). The hour angle, h, is defined as the longitude of the subsolar point relative to its position at noon.
Why is the Southern Hemisphere colder in June?
The June solstice, for the Southern Hemisphere, is the winter solstice. The coldest weather comes in July and August because the land and oceans in that part of the world take some extra weeks to give up their stored heat.
Why is it hotter in December than June in the Southern Hemisphere?
The reason we have seasons is that the Earth's axis is slighlty tilted so that in December the Northern Hemisphere is tilted away from the sun and the Southern Hemisphere is tilted towards the Sun. As a result, it is winter in the Northern Hemisphere and summer in the Southern Hemisphere.
What season does the sun have the least insolation?
Minimum values of insolation are received during the December solstice when day length and angle of incidence are at their minimum (see Table 6h-2 and section 6h). During the December solstice day length is only 5 hours and 33 minutes and the angle of the Sun reaches a lowest value of 6.5 degrees above the horizon.
What causes it to be colder in the winter and warmer in the summer in the Northern Hemisphere?
As the earth travels around the sun in its 365-day journey, some parts of the surface point directly at the sun at different times. When the northern hemisphere is pointed toward the sun, sunlight hits more directly, and it warms up this part of the earth.
Why is June warmer than December?
Earth rotates around its axis. In June, when the Northern Hemisphere is tilted toward the sun, the sun's rays hit it for a greater part of the day than in winter.
Why is it hotter in December than June in the southern hemisphere?
The reason we have seasons is that the Earth's axis is slighlty tilted so that in December the Northern Hemisphere is tilted away from the sun and the Southern Hemisphere is tilted towards the Sun. As a result, it is winter in the Northern Hemisphere and summer in the Southern Hemisphere.
Why is December colder than June?
The earth's axis of rotation is tilted relative to the earth's path around the sun. As a result we are tilted towards the sun in the summer and away from the sun in the winter.
Why is it warmer in July than June?
The continued warming occurs because the rate of heat input from the sun during the day continues to be greater than the cooling at night for several weeks past the solstice, until temperatures start to descend in late July and early August.
Why is it colder in December than in June in the Northern Hemisphere?
When the northern hemisphere is pointed toward the sun, sunlight hits more directly, and it warms up this part of the earth. In the winter, when the northern hemisphere is pointed away from the sun slightly, the sun's rays come in at an angle and have less of an impact. This makes winter cold!
Why is it hotter in August than June?
The most influential factor is the Earth's heat capacity: the Sun warms up the Earth, which later on radiates off heat in the form of electromagnetic radiation at longer wavelengths than that absorbed. This process is time-consuming, and the difference usually sums up to 4-6 weeks.
Why July and August are warmer for the Northern Hemisphere than June?
The most influential factor is the Earth's heat capacity: the Sun warms up the Earth, which later on radiates off heat in the form of electromagnetic radiation at longer wavelengths than that absorbed. This process is time-consuming, and the difference usually sums up to 4-6 weeks.