# How Do You Find The Duration Of Insolation?

## What causes the season?

The Short Answer: Earth has seasons because its axis is tilted.

Earth’s axis is always pointed in the same direction, so different parts of Earth get the Sun’s direct rays throughout the year..

## How do clouds affect insolation?

Low, thick clouds primarily reflect solar radiation and cool the surface of the Earth. High, thin clouds primarily transmit incoming solar radiation; at the same time, they trap some of the outgoing infrared radiation emitted by the Earth and radiate it back downward, thereby warming the surface of the Earth.

## At what time of year is the duration of insolation the least?

In the northern hemisphere, the greatest angles of insolation are received on June 21, but the hottest average temperature is not reached until late July or early August. In winter minimal insolation occurs on December 21, but the lowest average temperatures don’t occur until late January or early February.

## What is angle of insolation?

The angle of insolation is the angle at which the sun’s rays strike a particular location on Earth. When the north end of the Earth’s axis points toward the sun, the Northern Hemisphere experiences summer.

## What season has the greatest angle of insolation?

On the summer solstice, the Northern Hemisphere has the greatest number of daylight hours, whereas the Southern Hemisphere has the fewest. The angle of the sun above Earth’s Northern Hemisphere is greatest on this day.

## What does insolation depend on?

The solar radiation that makes its way through the atmosphere and to the surface is called insolation. The amount of insolation received at the surface depends on 1) the sun angle, 2) day length, 3) ground slope, 4) path length, and 5) the state of the atmosphere.

## How do you calculate insolation?

Solar insolation (I) can be calculated using the following formula: I = S cosZ. The maximum amount of solar insolation on a surface at a specific tilt angle can be calculated with the knowledge of latitude and the day of the year, based on the equation of the sun’s position in the sky throughout the year.

## Where is insolation strongest?

S. The vertical ray.strikes the equator on March 21 and September 22.The intensity of insolation is greatest on the equator. This is because the angle.of the sun is higher, at close to 90.

## Where is insolation the highest?

North PoleAt the equinoxes, solar insolation is at a maximum at the equator and is zero at the poles. At the summer solstice of the northern hemisphere, daily insolation reaches a maximum at the North Pole because of the 24-hour-long solar day.

## In which month is the duration of insolation longest?

June 21stThe duration of insolation varies with latitude and the season of the year. Maximum insolation occurs in the Northern Hemisphere around June 21st (Summer Solstice).

## At what time of year is the duration of insolation the greatest?

The Northern Hemisphere receives its maximum amount of Insolation between March and September, and for the Southern Hemisphere it is between September and March. There are times of the year when Polar Regions receive no Insolation at all.

## What time of day does maximum insolation occur?

(sun is at it’s highest point – usually around 12:00 p.m.) The time of the highest temperature lags behind the time when the most intense insolation is occuring. -the average warmest day of the summer occurs in late July, around a month after the longest day of the year.

## What are the four main factors that affect insolation?

Although many factors combine to influence weather, the four main ones are solar radiation, the amount of which changes with Earth’s tilt, orbital distance from the sun and latitude, temperature, air pressure and the abundance of water.

## What is the best absorber of insolation?

Absorption. When insolation strikes an object and is absorbed, the temperature of the object increases. Different materials vary in their absorptive capabilities. Mineral materials (rock, soil) are generally excellent absorbers; snow and ice are poor absorbers.

## What is the duration of insolation?

These slight changes in insolation result only from the annual changes in the altitude of the Sun above the horizon, as the duration of daylight at the equator is always 12 hours. The peaks in insolation intensity correspond to the two equinoxes when the Sun is directly overhead.