Simplify the following text for a Grade 10 native English-speaking person.
Original: The subtropical ridge is a significant belt of high pressure situated around the latitudes of 30 Â N in the Northern Hemisphere and 30 Â S in the Southern Hemisphere .
Simplified: The subtropical ridge is a large belt of high pressure situated around 30 Â N in the Northern Hemisphere and 30 Â S in the Southern Hemisphere .