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Sea surface height change from 1992 to 2019: Blue regions are where sea level has gone down, and orange/red regions are where sea level has risen (the visualization is based on satellite data). [ 2 ] Between 1901 and 2018, the average sea level rose by 15–25 cm (6–10 in), with an increase of 2.3 mm (0.091 in) per year since the 1970s.
In South Florida, sea levels have already risen several inches since the start of the century and could be around six feet higher by 2100. But another factor could be making those sunny day floods ...
Over geologic time sea level has fluctuated by more than 300 metres, possibly more than 400 metres. The main reasons for sea level fluctuations in the last 15 million years are the Antarctic ice sheet and Antarctic post-glacial rebound during warm periods. The current sea level is about 130 metres higher than the historical minimum.
Sea level rise of 1m effect on south eastern USA. South eastern USA population density and low elevation coastal zones. Wildfire, Florida Panther National Wildlife Refuge, 2009. Flooding during high tides occurs in Miami Beach. The city is spending $500M on elevated roadways, seawalls, and pumping systems, as part of its Sea Level Rise Strategy.
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By 2050, the sea level is forecast to have risen by 18 inches. The “2022 Sea Level ... Florida coast’s sea level expected to increase over a foot by 2050, NOAA & NASA find
Another threat to the Florida Reef is the ongoing rise in sea level. The sea level has risen almost six inches (15 cm) at Key West since 1913, and one foot (30 cm) since 1850. This rise in sea level increases the volume of water in Florida Bay significantly, and increases the exchange of water between the Bay and the water over the reefs.
South Florida is getting more than $180 million of bigger pipes, stronger stormwater pumps and higher canals to deal with rising sea levels — the majority of this year’s state funds.