Which outcome occurs when thawing permafrost destabilizes tundra?

💡 Explanation

Increased methane hydrate release occurs because permafrost thaw promotes microbial decomposition of formerly frozen organic matter via methanogenesis. This releases stored methane, rather than enhanced carbon uptake by vegetation; therefore permafrost thaw amplifies global warming.

• Which effect increases when riverine levees constrict floodplains subjected to increased precipitation?
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• Which environmental effect results when the subtropical jet stream meanders significantly?
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• Which outcome occurs when a cirque glacier experiences increased basal sliding?