What effect does forming sea ice have on nearby water salinity?

• A. Decreases salinity
• B. Increases salinity
• C. Has no effect
• D. Cools the water

Answer: (B)

Forming sea ice influences the salinity of nearby water. When seawater freezes, the salt in the water does not get incorporated into the ice; instead, it is expelled into the surrounding liquid water. This process increases the salinity of the remaining water as the ice forms. As sea ice begins to develop, the concentrated brine released from the ice increases the salinity of the adjacent ocean water, resulting in a higher salinity concentration.

This phenomenon is particularly important because the increase in salinity can affect local ocean circulation patterns and overall marine ecosystems. Understanding how sea ice formation impacts salinity helps in modeling climate systems and predicting changes in sea ice extent in relation to shifting environmental conditions.