Which risk increases because excessive removal of vegetation occurs in permafrost regions?

💡 Explanation

When vegetation is removed in permafrost regions, the active layer thickens because the insulating effect is reduced, prompting thawing and subsequent organic matter decay which releases methane, a potent greenhouse gas, into the atmosphere. Therefore more methane is relased, rather than decreased sediment/albedo or higher sequestration because these would require increased vegetation.

• Which mechanism alters surface salinity within subtropical gyres located far from landmasses?
• Which crustal deformation results when shear stress exceeds friction?
• Which process accelerates cave network formation in fractured limestone?
• Which mechanism causes cyclical changes in surface sea temperature across the equatorial Pacific Ocean?
• Which outcome results in fjord waters from high precipitation overcoming natural dilution?
• Which outcome accelerates the development of sea caves when waves erode coastal cliffs?