- Education and Science
Spring Is In The Air... For Some
Today is the vernal equinox - the first day of spring in the Northern Hemisphere and autumn in the Southern Hemisphere
On the vernal equinox, the sun is directly over the earth's equator, and daylight lasts 12 hours in the Northern Hemisphere.
An equinox occurs when the sun is directly over the equator and a solstice when the sun is farthest away.
The effect of a solstice or equinox on earth varies by location. For example, in the subtropical areas, seasons are marked by the amount of precipitation received. In these regions, rain varies more dramatically than temperatures. They have dry seasons and monsoon seasons.
Polar regions and the planet's more temperate regions, seasons are marked by the degree of sunlight. Sunlight signals plants to grow or become dormant and animals migrate or hibernate. In these areas, the seasons of spring, summer, fall and winter are recognized.