Which outcome occurs when long-term permafrost thaw destabilizes a subsea methane hydrate deposit?

💡 Explanation

When permafrost thaws, the reduced pressure and increased temperature destabilize the methane hydrate because it is in equilibrium, causing rapid methane release into the water column. Therefore, methane release results in the water column, rather than hydrothermal vents, sedimentation, or canyon formation which have distinct processes and timescales.

• Which mechanism causes the aridity observed on the leeward side of mountain ranges bordering major river streams?
• Which weather phenomenon results from the Coriolis effect acting on synoptic air masses influenced by a high-pressure system?
• Which consequence results when increased acidity accelerates limestone dissolution underground?
• Which mechanism maintains persistent surface high-pressure zones around 30 degrees latitude?
• Which atmospheric change occurs when increased polar ice melt disrupts the Hadley Cell?
• Which mechanism significantly increases flood risk in an alluvial river system after deforestation in the upstream drainage basin?