Friday, May 13, 2022

Mapping Rising Seas

NZ SeaRise is an interactive map which reveals how rising sea levels might effect locations around the coast of Aotearoa based on different climate change scenarios. Using the map you can view the likely impact of sea level rises at 7,434 sites around New Zealand (covering every 2km of coastline).

Because New Zealand suffers from a lot of techtonic activity mapping the impact of sea level rises in the country also involves calculating where coasts are moving up (uplift) and down (subsidence) in relation to sea level. NZ SeaRise includes data on the likely rate and direction of vertical land movement for every 2 km of Aotearoa's coast. 

The colored dots on the map show the projections of vertical movement around the coast. If you click on one of these dots you can view a graphed projection of sea level rise at that location until 2150 or 2300. This graph uses different colored lines to show the projected sea level rises under different climate change models. 

If you want to know how rising sea levels could affect other locations across the world you can use Climate Central's Coastal Risk Screening Tool. This interactive map allows you to see which areas around the globe are most threatened by sea level rise and coastal flooding. The map uses coastal elevation data with the latest projections for future flood levels to model how rising seas will impact all coastal communities.

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