What is Arctic amplification and what causes it?

• A. Arctic warms slower than the global average.
• B. Arctic warming is driven solely by ocean salinity changes.
• C. Arctic amplification refers to the Arctic warming more slowly due to ice cover.
• D. The Arctic warms faster than the global average, driven by sea ice loss, albedo feedbacks, and atmospheric/ocean dynamics.

Answer: (D)

Arctic amplification is the idea that the Arctic warms faster than the global average. This stronger warming happens because several feedbacks and processes reinforce each other. The most influential is the loss of sea ice: as ice melts, the surface becomes darker and absorbs more sunlight, raising surface temperatures further in a self-reinforcing cycle called the albedo feedback. Warming air and water in the region, plus changes in atmospheric and ocean circulation, bring more heat into the Arctic, amplifying the effect. Snow cover reduction and thinner ice also contribute, exposing even darker surfaces that absorb more energy. Altogether, these factors mean the Arctic responds more strongly to global warming than other regions, which is captured by the statement that Arctic warming is driven by sea ice loss, albedo feedbacks, and atmospheric/ocean dynamics.

The other descriptions don’t fit because they imply slower warming, or rely on a single driver (like ocean salinity) or misattribute the cause to ice in a way that doesn’t reflect how the system actually behaves.