How wind is formed

Most of the solar radiation enters the equatorial zone. And over Antarctica and the Antarctic sun does not appear on the whole months. The simplest example of a wind is a sea breeze. It appears something like this. In the afternoon air over land warms more than the sea. The heated air rises and in its place comes a cold from the sea. At night, on the contrary - land cools more than the sea. Cold stream from the bank pushes up the warmer air over the sea. And so it turns out that afternoon the wind blows from the sea towards the land, and at night - on the contrary. Like this arise and more powerful winds. Wind direction is always determined by the sailors the other side of the horizon from which it blows. They have identified sixteen areas and called their rumba. In our time, the wind speed is usually measured in meters, traveled by air flow in one second. Sailors measure wind force on a scale of dvenadtsatibalnoy scale. This so-called wind Beaufort wind scale. One point corresponds to wind speeds of about 2 meters per second. On points - Calm (no wind) 1-2 points - the breeze with this wind to sail all the sails were raised. 3 points - light wind 4 points - moderate breeze Even at this wind of the sails on the ship was removed. 5-7 points - 11.8 points a strong wind - the storm (storm) 12 points - a hurricane on the ship were cleaned all the sails. Storms and hurricanes are very dangerous for sailing. They are dangerous not because they raise the big waves. Their danger lies elsewhere. During inclement weather, particularly when the storm happened at night, sailors was very difficult to determine their whereabouts. Sailboat could stumble on a rock or on an underwater reef, or just run into another ship. Tens and hundreds of timber ships sunk, captured in the open sea by storm or hurricane. Hundreds of fishermen were killed in a quagmire.