Which mechanism causes increased stream meandering in regions where the jet stream weakens and becomes more zonal?

💡 Explanation

When the jet stream weakens and becomes more zonal, atmospheric blocking patterns increase because slower zonal winds cause Rossby waves to amplify, leading to prolonged precipitation events concentrated in certain areas. Therefore, increased precipitation leading to greater stream discharge and bank erosion results, rather than other options which depend on different climate mechanisms.

• Which mechanism primarily deflects moving air masses creating jet streams above surface streams influenced by the Hadley Cell?
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