Anonymous
Anonymous asked in Science & MathematicsGeography · 5 months ago

# Why is North Pole’s continuously 23.5 degrees solar angle for 24 hours still far much colder than Equator?

Equator’s solar angle at the zenith at noon only plus there are still 12 hrs nighttime

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• 5 months ago

The angle the sun hits above the arctic zone is lower meaning more shadow and less absorption. North of 23 degrees also has much longer nights and no sun during winter solstice.

• 5 months ago

the sun at the poles on the most intense day of sunlight receives heat energy per unit area that is only 40% of what the equator receives at noon. The energy per unit area received at the equator only drops to the maximum polar energy received late in the afternoon (once the sun is down to about 24 degrees above the horizon) and early in the morning, so the equator still receives more energy on its weakest energy day than the poles receive on their highest energy day.

Never mind that it takes time to heat up the air and surface, so even if the poles were to receive more energy, it would still takes many days or even weeks to get the ground and air up to equatorial temps. A pot of water does not boil immediately when you turn the burner on high either.

• 5 months ago

The average amount of incoming solar radiation decreases from the Equator to the poles. This is because the low latitudes (near the Equator) receive relatively large amounts of radiation all year, AND at high latitudes (near the poles), the more oblique angle of the Sun's rays together with long periods of darkness in the winter, resulting in a low average amount of received radiation.

• 5 months ago

While the tilt of the earth is continuously 23.5 degrees, the solar angle at a location on earth is not. The solar angle, which is the angle from the surface of the earth to the sun changes based on the day of the year, time of day, and the location on the earth. The tilt and position of the earth in orbit around the sun is want causes seasons.

If you define nighttime as sunrise to sunset, then nighttime is only exactly 12 hours at certain locations on certain days of the year (the equator on the vernal equinox, for example). The North Pole has 24 hrs of nighttime in the winter and zero hours of nighttime in the summer.

Finally, the solar angle the amount of solar radiation that strikes the earth. The sun is only directly overhead between the tropic of capricon and tropic of cancer and at any one location only on certain days of the year. The less direct the sun, the more the larger area the solar radiation is spread, so even in the summer when the north pole sees the sun 24 hrs a day, the GREATEST angle is 23.5 degrees at noon, where the angle over the tropic of capricorn is 90 degrees at the time.

Note table 6h-1 in the following:

http://www.physicalgeography.net/fundamentals/6h.h...

Finally, the earth's climate is also determined by wind patterns, ocean currents, and the heat retained in the earth and atmosphere is not evenly distributed, which is why there are ice caps on the poles, but not on the equator.

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• 5 months ago

If you heat something with a torch for 10 seconds every minute, it's still going to be hotter than if you hold a lighter in the other room from it.

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