The                               model of atmospheric circulation is used to explain the distribution of biomes around the globe?

The model you're referring to is the "Hadley Cell" model of atmospheric circulation. This model is used to explain the distribution of biomes around the globe.

Here are the steps to understand how it works:

1. The Hadley Cell model describes the circulation of air around the Earth. It is named after George Hadley, who first proposed the concept in the 18th century.

2. According to the model, the air at the equator is heated by the sun, causing it to rise. This creates a low-pressure zone.

3. As the warm air rises, it cools and loses its moisture. This is why we have rainforests at the equator.

4. The cool, dry air then moves towards the poles. Around 30 degrees latitude, it descends, creating a high-pressure zone. This is why we have deserts at these latitudes.

5. The descending air then moves either towards the equator or towards the poles, creating a circulating pattern of air movement.

6. This pattern of air movement influences the climate and therefore the distribution of biomes around the globe. For example, the movement of air can determine whether a region is a desert, a rainforest, or a grassland.

7. There are actually three of these cells (Hadley, Ferrel, and Polar) in each hemisphere, but the Hadley cell is the most important for tropical and subtropical climates.

So, the Hadley Cell model of atmospheric circulation is a key factor in determining the distribution of biomes around the globe.