Which effect explains jet stream deflection around elevated terrain like the Himalayas?

💡 Explanation

When a jet stream encounters elevated terrain, the conservation of potential vorticity leads to the generation of Rossby waves because changes in latitude are necessary to conserve angular momentum, causing deflection. Therefore, Rossby waves explain the deflection, rather than albedo, Ekman transport or orographic lift which explain temperature, currents and precipitation respectively.

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