As climate reporter Rebecca Hersher explains, it’s vital data for scientists trying to understand how global warming is affecting the Earth’s oceans.
Climate scientist Astrid Caldas and her colleagues have looked at where it’s happening now and where it could happen in the future as the tides keep getting higher.
We know that melting glaciers lead to sea level rise, but what else?
Do sea levels rise when ice melts? Does it matter whether the ice is on land or in the ocean?