"Sea level along the U.S. coastline is projected to rise, on average, 10-12 inches (0.25 - 0.30 meters) in the next 30 years (2020 - 2050), which will be as much as the rise measured over the last 100 years (1920 - 2020). Sea level rise will vary regionally along U.S. coasts because of changes in both land and ocean height.”

Fact Check:

The claim that global warming is resulting in rising sea levels is demonstrably false. It really hinges on this statement: “Tide gauges and satellites agree with the model projections.” The models project a rapid acceleration of sea level rise over the next 30 to 70 years.” However, while the models may project acceleration, the tide gauges clearly do not.

All data from tide gauges in areas where land is not rising or sinking show instead a steady linear and unchanging sea level rate of rise near 4 inches/century, with variations due to gravitational factors.

It is true that where the land is sinking as it is in the Tidewater area of Virginia and the Mississippi Delta region, sea levels will appear to rise faster but no changes in CO2 emissions would change that. The implication that measured, validated, and verified Tide Gauge data support this conclusion remains simply false.

All such references rely on “semi-empirical” information, which merges, concatenates, combines, and joins, actual tide gauge data with various models of the reference author’s choosing. Nowhere on this planet can a tide gauge be found, that shows even half of the claimed 3.3 mm/yr sea level rise rate in “Tectonically Inert” coastal zones. These are areas that lie between regions of geological uplift and subsidence. They are essentially neutral with respect to vertical land motion, and tide gauges located therein show between 1 mm/yr (3.9 inches/century) and 1.5 mm/yr (6 inches/century rise). The late, great Swedish Oceanographer, Nils-Axel Morner, has commented on this extensively, and his latest papers confirm this ‘inconvenient truth’.

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Holgate (2007) actually showed a slowing began in the late 20th century.

Source:
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Furthermore, alarmist claims that “Satellites agree with the model projection” are false. Satellite technology was introduced to provide more objective measurement of the sea level rise because properly adjusted tide gauge data was not fitting Alarmists’ claims.

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However, the new satellite and radar altimeter data lacked the resolution to accurately measure sea levels down to the mm level. Moreover, the raw data from this technology also conflicted with Alarmists’ claims. As a result, adjustments to this data were also made - most notably a Glacial Isostatic Adjustment (GIA). GIA assumes that basically all land is rebounding from long ago glaciations and oceanic basins are deepening. The assumption is that this rebounding is masking the true sea level rise. Alarmists continue to proclaim that their models project a rapid acceleration of sea level rise over the next 30 to 70 years, when those same models have failed to even come close to accurately predicting the past 25 years.

Natural Factors

Sea level rises are influenced by factors like El Nino and La Nina. El Nino’s produce warming and ocean expansion, increasing sea levels rises. La Nina’s produce cooling and ocean contraction and slower rises.


Source: UCO GMSL and the MEI (Enlarged)

Hansen had predicted in the late 1980s, flooding of the West Side Highway and water lapping on the steps of GISS in New York City within 20 years (by 2010). Sea levels have increased a little over an inch over that period. ABC predicted in that Manhattan would look like this by 2014. Again no appreciable change has occurred.

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Global warming is not resulting in rising sea levels.

For much more detail see. Also see here how scientists were caught adjusting sea level data.