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POLAR REGION

PREPARED BY- SMIT PANCHAL

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Solar radiation has a lower intensity in polar Regions because the angle at which it hits the Earth is not as direct as at the equator. Another effect is that sunlight has to go Through more atmosphere to reach the Ground.

• The polar climate regions are characterized by a lack of warm summers. Every month in a polar limate has an average temperature of less than 10 °C (50°F).

• Regions with polar climate cover more than 20% of the Earth. The sun shines for long hours in the summer, and for many fewer hours in the winter.

• A polar climate results in treeless tundra, glaciers, or a permanent or semipermanent layer of ice.

• It has cool summers and very cold winters. Polar environments can even go

to a temperature of -115F.

POLAR REGION

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•HOUSING-In places like Alaska and Greenland, houses have to be erected on poles driven through the ground because of the permafrost.

BUILDING TYPOLOGY

•IGLOO- Igloo are made for temporary homes during winter travels. The temperature inside are cool enough to keep the walls from dripping. The igloos are built at right angles to the prevailing winds.

• TENTS-During the summer people who live in the polar regions usually live in caribou or seal skin tats. A soapstone lamp is used for heating and lighting.

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The polar regions percipitation is low because air is too cold to contain much water vapour. In fact, some part of antartica and the arctic are as dry as hot climates of the subtropics, where high pressure also limits cloud formation and percipitation. Both hot and cold deserts may receive less than 10 inches or 250 millimeters of percipitation each year. Indeed, in some parts of the subtropics, rain may not fall for several years.

THE RAINFALL IN POLAR REGION

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SUN PATHS• Sun path refers to the apparent significant

seasonal-and-hourly positional changes of the sun (and length of daylight) as the Earth rotates, and orbits around the sun.

• The relative position of the sun is a major factor in the heat gain of buildings and in the performance of solar energy Systems

TEMPERATURE• Average January temperatures range from about −40 to 0 °C (−40 to 32 °F),

and winter temperatures can drop below −50 °C (−58 °F) over large parts of the Arctic.

• Average July temperatures range from about −10 to 10 °C (14 to 50 °F), with some land areas occasionally exceeding 30 °C (86 °F) in summer.

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AIR FLOWPolar winds begin near the north and south poles. Frigid air in the winter sinks toward the ground a creating a high pressure area at the poles. 60 degree north and south latitude warm air is rising creating low pressure areas. Temperature inversions can occur along the pacific north west coast when cold polar air is trapped on the ground and the warmal air move in from warmer latitude.