Summary
Thermal expansion and melting land ice raise oceans, threatening coastal habitats and communities.
In depth
Global mean sea level has risen about 20 cm since 1900, now over 4 mm per year. Contributions: thermal expansion, glaciers and ice sheets. Impacts: coastal erosion, flooding, saltwater intrusion. Coastal habitats may be squeezed if barriers prevent landward migration.
Rates are accelerating with ice sheet loss. Impacts vary regionally due to land subsidence. Responses include sea walls, managed retreat and nature-based defences.
Remember: thermal expansion of water contributes substantially.
Frequently asked questions
What is Sea Level Rise?
Thermal expansion and melting land ice raise oceans, threatening coastal habitats and communities.
Which area of biology covers Sea Level Rise, and how advanced is it?
Sea Level Rise is one of the 54 topics in Marine & Environmental Biology. It is rated Advanced, so it suits learners who want specialist depth. Related topics in this area include Global Warming, Estuaries, Marine Symbiosis.
Can you give an example of Sea Level Rise?
Low-lying island nations like Tuvalu are threatened.
What should I learn before Sea Level Rise?
Work through the Beginner topics in Marine & Environmental Biology first, such as Oceans, Ocean Zones, Plankton, then return to Sea Level Rise. Advanced topics assume the Intermediate vocabulary.
What topics are related to Sea Level Rise?
The closest topics to Sea Level Rise are Global Warming, Estuaries, Marine Symbiosis, Deforestation. Comparing them side by side is a good way to see how the ideas connect.
How can I check that I understand Sea Level Rise?
Read the summary and the in-depth section, then use the quick check on the interactive lesson for Sea Level Rise. To practise the whole of Marine & Environmental Biology, use the Marine & Environmental Biology quiz.
How is Sea Level Rise different from Global Warming?
Sea Level Rise: Thermal expansion and melting land ice raise oceans, threatening coastal habitats and communities. Global Warming: The long-term rise in global average temperature caused mainly by human emission of greenhouse gases. Read both side by side and note what each one explains.
How should I study Sea Level Rise step by step?
First, read the summary and write the definition in your own words. Second, read the in-depth section and note any example. Third, compare it with Global Warming and explain the difference aloud. Finally, take the Marine & Environmental Biology quiz and come back to this page for any question you miss.