Which mechanism causes air to descend in the subtropical regions related to atmospheric circulation cells?

💡 Explanation

When warm air rises at the equator, it cools and then descends in the subtropics, adiabatic compression occurs which heats and dries the air as it sinks, leading increase stability. Therefore, adiabatic compression is the mechanism rather than convergence, radiative cooling or latent heat which would have different locations and effects on stability.

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