Wind

Wind is the movement of air. 

Wind occurs when air moves from an area of high pressure to an area of low pressure

Pressure gradient is the difference in air pressure between two locations. The greater the pressure gradient, the faster the wind speed

Wind is measured by its speed, direction and frequency

Wind speed is the rate of movement of air measured in km/h(kilometer per hour) using an anemometer 

Wind direction is the direction from which the wind blow measured using a wind vane. The wind vane points to the direction from which the wind is blowing 

Wind frequency is the percentage of time where a wind blows from one particular direction. The direction where the wind blows the most frequent is known as the prevailing wind.

Wind direction and frequency is recorded in a wind rose.

Sea Breeze

In the day, the land is warmer than the sea, since the land conducts heat faster than the sea. This results in a low pressure at the land and high pressure at the sea

Land Breeze

At night, the sea is warmer than the land, since the sea loses heat slower than the land. This results in a lower pressure at the sea and a higher pressure at the land

Monsoon Winds

Monsoon winds are regional wind patterns that reverse direction seasonally. There is the southwest monsoon and the northeast monsoon

Southwest monsoon*

Take place from June to September.

Northeast Monsoon*

Take place from October to February

*This is the name of the winds only at the Northern hemisphere!

The monsoon wind doesn't blow in a straight direction due to the Coriolis effect. The Coriolis effect is a force produced by the rotation of the earth. This force change the direction of winds. Therefore, monsoon winds doesn't blow in a straight direction and will change i's direction when it crosses the equator.

Coriolis Effect