The ocean undergoes significant changes over time, primarily due to factors like thermal expansion and melting ice.
Sea Level Rise
One of the most noticeable changes is the rise in sea level. Over the past 100 years, global sea level has increased by 6 to 8 inches (15-20 cm).
Contributing Factors
| Factor | Description |
|---|---|
| Thermal Expansion | As ocean water warms, it expands, taking up more space. This accounts for about one-third of the sea level rise observed in the last century. |
| Meltwater from Glaciers and Ice Sheets | Melting glaciers and ice sheets on land contribute the other two-thirds of the increase as they flow into the ocean. |
Practical Implications
- Increased coastal flooding.
- Erosion of shorelines.
- Saltwater intrusion into freshwater sources.
Summary of Ocean Change Over Time
In summary, the ocean is changing due to factors like thermal expansion and melting ice, leading to a significant rise in sea levels. These changes have wide-ranging impacts on coastal communities and ecosystems.
