What process contributes to sea level rise through a loss of mass?

• A. Melting of glaciers
• B. Formation of new ice sheets
• C. Evaporation of ocean water
• D. Increased precipitation

Answer: (A)

The process that contributes to sea level rise through a loss of mass is the melting of glaciers. As glaciers lose mass due to increased temperatures, the water that was previously stored in solid form as ice is released into the oceans. This additional water contributes directly to rising sea levels.

Glacier melt is primarily driven by global warming, as higher temperatures lead to more extensive thawing of frozen water. This phenomenon is particularly evident in polar regions and mountainous areas where glaciers are retreating at alarming rates.

In contrast, the other processes listed do not lead to a net loss of water from the sea, and in fact, some may even have the opposite effects. For example, the formation of new ice sheets would involve water being stored as ice, which wouldn’t contribute to sea level rise. Evaporation of ocean water results in water vapor but does not decrease the overall volume of the oceans. Increased precipitation can lead to a temporary rise in water levels due to runoff, but it doesn’t influence mass loss since it redistributes water rather than removing it from glaciers.