(Featured Image Borrowed from The Guardian)
Guest post by David Middleton,
Eric Worrall’s recent essay on the Prime Minister of Tuvalu and his reticence to providing some evidence that his island nation is being inundated by rising sea level inspired me to devise a simple test to see if an island is sinking, vanishing or being washed away:
Planimeter a recent map of the island and compare it to an older map of the island.
Since the USGS has a large historical inventory of topographic maps, this should be relatively easy for any islands in these United States.
For my test case, I chose Key Biscayne, Florida. It’s just south of the perennially sinking Miami Beach, has a maximum elevation of about 5′, is relatively small and the USGS had several vintages of 7.5 minute quadrangles available.
I planimetered the coast lines of each map and found no significant changes over the 51 years from 1962-2012…
I guess I’m going to have to deny climate change or at least doubt the climate, because I can’t see any effect of sea level rise on this puny, flat, little island. (/sarc).