Jetstrømmebælterne

Jetstrømmebælterne, often referred to as jet streams, are fast-flowing, narrow air currents found in the Earth's atmosphere. These currents are characterized by their high wind speeds, typically ranging from 100 to over 250 miles per hour. Jet streams are primarily located in the upper troposphere and lower stratosphere, playing a crucial role in weather patterns.

There are two main types of jet streams: the polar jet stream and the subtropical jet stream. The polar jet stream is located closer to the poles and is driven by the temperature difference between cold polar air and warmer mid-latitude air. It generally flows from west to east, meandering across the globe. The subtropical jet stream is found closer to the equator and is driven by the temperature difference between tropical and temperate regions.

The position and strength of jet streams are influenced by several factors, including the Earth's rotation and significant temperature gradients. These currents act as boundaries between different air masses, and their movements can steer weather systems such as storms, rain, and snow. Changes in jet stream behavior can lead to prolonged periods of extreme weather, such as heatwaves or cold snaps, in the regions they influence. Understanding jet streams is therefore vital for weather forecasting and climate research.