Settlement describes what process in the snowpack?

• A. Snowflakes Bonding Into a Crust
• B. Progressive Sintering, Snow Becomes Denser and Stronger
• C. Snow Gaining Albedo
• D. Snow Evaporating

Answer: (D)

Settlement in the snowpack refers to the compaction that happens as layers bear the weight of overlying snow. This process makes the snow grains press closer together, increasing contact area and enabling metamorphic bonding between grains. Over time, that bonding (a form of progressive sintering) makes the layer denser and stronger, while reducing the spaces between grains. So the concept being tested is densification due to weight and grain bonding.

Among the options, the idea that best fits settlement is progressive sintering, where snow becomes denser and stronger as grains bond and rearrange under pressure. Evaporation describes mass loss from the surface or within the snow, not the vertical compaction and densification of the snowpack. Gaining albedo is about surface reflectivity and not the internal packing, and snowflakes bonding into a crust touches on bonding but doesn’t capture the overall settling process.