Sea levels are not rising abnormally, they're rising at the same rate (33.2 cm/century) as they have for thousands of years and this has not changed to the present day. NASA has a sea level site and you can see it's still the same. [1]
Claims sea levels were rising normally turned out to be a math error caused by Florida literally sinking after 100 years of pumping out all the grondwater; other cities such as Beijing who also pump out groundwater at similar rates are having the exact same issue. There's nothing to see here, move along.
NASA has a sea level site. Notice today's rate is 33,2 cm/century which is has been 1, 10, 100, and 1000 years ago. Please check this for yourself.
Here's the historical graph of sea rise from Wikipedia,notice it's been 33,2 cm/century for 8000 years. Note the inflection point 6-8 kya.
http://rs79.vrx.palo-alto.ca.us/opinions/ideas/climate/.images/00-0-Copr_2018-wiki.png
Notice it went negative in 2016 according to NASA. Where did that water go?
http://rs79.vrx.palo-alto.ca.us/opinions/ideas/climate/.images/sea-fall2-cbc.png
The land is sinking far faster than the sea is rising. Here is a good article explaining the land is sinking which makes it look like the sea is rising abnormally. This explains the "issue" where sea-rise was 4" a year in Mimi but not 160 miles away in the Florida keys.
http://www.nature.com/news/source-found-for-missing-water-in-sea-level-rise-1.10676
Here's a photo of the groundwater issue and explanation:
http://geologylearn.blogspot.ca/2015/12/groundwater-problems.html
Note also this is not just Florida that's having this problem.
http://www.theweek.co.uk/73907/beijing-sinking-by-four-inches-a-year
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Remove the trees and the sea reclaims the land
Human development accounts for most of the loss of beaches.
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Contrary to climate alarmism and media coverage, reef islands are GROWING despite rising sea, says new study
Against all odds, low-lying reef islands actually appear to be growing in some parts of the world, despite rising sea levels, increasing their footprint and defying doomsday predictions.
Geomorphologist Murray Ford from the University of Auckland in New Zealand led a team of researchers who examined Jeh Island, one of the 56 islands that make up the Ailinglaplap Atoll in the Marshall Islands, itself one of the most endangered nations on Earth.
Ford and his team pored over aerial and satellite imagery of the island from above and made the startling discovery that not only has Jeh increased in total land area by 13 percent since 1943, it may actually have once been four separate islands which have now morphed together due to net land-mass gains.
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A new study suggests British Columbia (Canada) relative sea levels remained 10 meters higher than they are today until they fell to their present levels in the last ~1800 years.
After the peak of the last glacial about 20,000 years ago, relative sea levels subsequently rose from 120 meters below modern sea levels to heights of 90 meters above today’s by ~14,500 years ago in the Douglas Channel near British Columbia, Canada (Letham et al., 2021).
Sea levels proceeded to fall 75 to 80 meters over the next 3000 years, or about -2.5 meters per century (-25 mm/yr), and then they remained 10-15 m above present for the next ~9000 years.
“We determine that central Douglas Channel was ice-free following the Last Glacial Maximum by ∼14,500 BP and RSL was at least
90 m higher than today. Isostatic rebound caused RSL to fall to 21 m asl by 11,500 BP, though there may have been a glacial re-advance that would have paused RSL fall around the beginning of the Younger Dryas. RSL fell to 10–15 m asl by 10,000 BP, and continued to drop at a slower rate towards its current position, which it reached by ∼1800 years
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Refs:
[1] Sea level measurement
Florida is sinking because groundwater was pumped out.
http://www.nature.com/news/source-found-for-missing-water-in-sea-level-rise-1.10676
island: Contrary to climate alarmism and media coverage, reef islands are GROWING despite rising sea, says new study
https://www.rt.com/news/509099-islands-growing-sea-level-rise/
bc: A new study suggests British Columbia (Canada) relative sea levels remained 10 meters higher than they are today until they fell to their present levels in the last ~1800 years.
https://www.sciencedirect.com/science/article/abs/pii/S0277379121001980
