Põhjapoolkeras

Põhjapoolkeras, also known as the Northern Hemisphere, is the half of the Earth that lies north of the Equator. It encompasses all of North America, Europe, Asia north of the equator, and parts of Africa and South America. The Northern Hemisphere experiences distinct seasons, with summer from June to August and winter from December to February, due to the tilt of the Earth's axis relative to its orbital plane around the Sun.

The majority of the world's landmass and population reside in the Põhjapoolkeras. Major geographical features include extensive mountain ranges like the Himalayas and the Rockies, vast oceans such as the Atlantic and Pacific, and large continents. The climate varies significantly across the hemisphere, ranging from tropical regions near the equator to arctic conditions in the far north.

Historically, much of human civilization and technological development has originated and flourished in the Põhjapoolkeras, influencing global culture and economics. Understanding the Põhjapoolkeras is fundamental to comprehending global geography, climate patterns, and human distribution on Earth.