Climate Zones

The tropical rainforest climate, found near the equator, features consistently warm temperatures (typically 77-82°F / 25-28°C) and heavy rainfall throughout the year, often exceeding 80 inches annually.

The Köppen climate classification, developed by Russian-German climatologist Wladimir Köppen in 1884, is the most widely used system. It divides climates into five main groups based on temperature and precipitation.

The Mediterranean climate features hot, dry summers and cool, wet winters. It is found around the Mediterranean Sea, parts of California, central Chile, and southwestern Australia.

The McMurdo Dry Valleys in Antarctica are considered the driest place on Earth. Some areas have received no rain for nearly 2 million years. Despite being cold, these valleys are technically a desert.

El Niño is the warm phase of the El Niño-Southern Oscillation (ENSO), causing warmer-than-usual sea surface temperatures in the central and eastern Pacific. It can affect weather patterns worldwide.

Arid and semi-arid climates cover about 33% of Earth's land surface, making them the most extensive climate zone. This includes hot deserts like the Sahara and cold deserts like the Gobi.

Seasons are caused by Earth's axial tilt of approximately 23.5 degrees. As Earth orbits the Sun, different hemispheres are tilted toward or away from the Sun, creating seasonal changes.

The tundra climate features permafrost (permanently frozen ground), extremely short growing seasons, and average temperatures below 50°F (10°C) even in the warmest month. It supports only low-growing vegetation.

Monsoons are caused by the seasonal reversal of wind direction. In summer, winds blow from the ocean toward the heated land, carrying moisture that produces heavy rainfall across South Asia.

Cherrapunji (Sohra) in Meghalaya, India, receives an average of about 460 inches (11,700 mm) of rain annually, making it one of the wettest places on Earth. Most of this falls during the monsoon season.

An urban heat island is a metropolitan area that is significantly warmer than surrounding rural areas due to human activities, buildings, roads, and reduced vegetation. Cities can be 2-5°F warmer than nearby countryside.

The stratosphere, extending from about 7 to 31 miles (12-50 km) above Earth, contains the ozone layer. This layer of ozone gas absorbs most of the Sun's harmful ultraviolet radiation.

The Amazon Basin has a tropical wet (rainforest) climate with consistently high temperatures and abundant rainfall throughout the year. Annual rainfall typically exceeds 60 inches (1,500 mm).

The jet stream is a narrow band of very strong winds in the upper atmosphere, typically at 30,000-40,000 feet altitude. It flows from west to east and significantly influences weather patterns and storm tracks.

Asia has the most diverse range of climate zones of any continent, spanning from arctic tundra in Siberia to tropical rainforests in Southeast Asia, and from deserts in the Middle East to monsoon regions in South Asia.