Which outcome occurs when seasonal subtropical high-pressure systems weaken?

💡 Explanation

Increased seasonal stream capture results, driven by avulsion, because decreased pressure allows more localized intense rainfall; therefore, channels erode surrounding topography, rather than promoting sorted, graded sediment like constant pressure gradients typically would.

• Which mechanism primarily leads to the formation of an oxbow lake cutoff?
• Which effect results when increased surface heating strengthens Hadley cell circulation?
• Which risk increases when artificial levees constrict a river's floodplain during an extreme rainfall event?
• Which increased risk follows loess deposit exposure to increased saturation?
• Which outcome follows accelerated glacial retreat on bedrock?
• Which mechanism explains downslope soil movement observed in periglacial environments experiencing thaw cycles?