No acceleration in the historical trend. No correlation with CO2 increase. End of story.
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We have been studying climate change and potentially associated sea level changes resulting from melting ice and warming oceans for a half century, says CFACT.
In the 1970s our primary concern was global cooling and an advancing new ice age.
Many believe that increasing quantities of carbon dioxide in our atmosphere could result in rising levels of the sea in general. The record does not show this to be true.
There is no evidence whatever to support impending sea-level-rise catastrophe or the unnecessary expenditure of state or federal tax monies to solve a problem that does not exist.
The National Oceanographic and Atmospheric Administration (NOAA) has updated its coastal sea level tide gauge data which continue to show no evidence of accelerating sea level rise.
These measurements include tide gauge data at coastal locations along the West Coast, East Coast, Gulf Coast, Pacific Ocean, Atlantic Ocean and the Gulf of Mexico, as well as seven Pacific Island groups and six Atlantic Island groups, comprising more than 200 measurement stations.
The longest NOAA tide gauge record on coastal sea level rise measurements is in New York at the Battery, with its 160-year record which is shown below with a steady rate of sea level rise of 11 inches per century.
A slightly slower rate of sea level rise occurs at nearby Kings Point, New York, whose 80-year record also appears below.
. . .
[The analysis concludes…]
The data and projected trends for these ten well-documented coastal cities point to three conclusions:
1 – There has been no dramatic sea level rise in the past century, and projections show no dramatic rise is likely to occur in the coming century.
2 – There is no evidence to indicate the rate of sea level rise or fall in any of the areas of this study will be substantially different than has been the case over the past many decades.
3 – There is no correlation between CO2 concentrations in the atmosphere and sea level rise. The steady but modest rise in sea level predated coal power plants and SUVs, and has continued at its same pace even as atmospheric CO2 concentrations rose from 280 parts per million to 420 parts per million today .
Full article here.
Tallbloke's Talkshop 
This article claims that there is no correlation between official records of sea-level rise (SLR) and atmospheric CO2 concentration. However, this is not true: Over the past 40 years and especially since 1993 (when the satellite-based sea-level record began), the correlation between SLR, Ocean Heat Content (OHC) and atmospheric CO2 is greater than 0.9:
The problem with the official records of SLR and OHC is that they show an uncanny high correlation with atmospheric CO2 while displaying virtually no correlation with sea surface temperature (SST). This is physically impossible, since ocean-temperature changes drive OHC and the water thermal expansion (contributing over 60% to SLR).
The conclusion from this evidence is then that SLR and OHC records must have deliberately been altered (faked) to fit the CO2-based theory of climate change!
@Ned Nikolov
UAH surface air temperature is not the same, as SST (sea surface temperature), which is water temperature, and they don’t always correlate… (notably because air temperature changes much easier than water temperature)
Then claiming, that sea level rise correlates with CO2 rise, just because they are both almost linear, is also a stretch, mainly because as the article claims, the sea level has been steadily rising before coal power plants already…
One could claim, that anything almost-linear correlates with CO2 rise … (more so if you scale the axis properly to have a same overall slope)
There have been changes in rate of CO2 increase – notably a slow-down in 1990, speed-up in 1998, slow-down in 2000 and speed-up in 2002, and various less notable rate changes… In overall, beside yearly sinusoid, CO2 has been rising by 0.1ppm/month in 1980-1994, and by 0.2ppm/month since 2012… Can these be observed in rate of Sea level changes ?
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@Ned Nikolov
UAH surface air temperature is not the same, as SST (sea surface temperature), which is water temperature, and they don’t always correlate… (notably because air temperature changes much easier than water temperature)
Then claiming, that sea level rise correlates with CO2 rise, just because they are both almost linear, is also a stretch, mainly because as the article claims, the sea level has been steadily rising before coal power plants already…
One could claim, that anything almost-linear correlates with CO2 rise … (more so if you scale the axis properly to have a same overall slope)
There have been changes in rate of CO2 increase – notably a slow-down in 1990, speed-up in 1998, slow-down in 2000 and speed-up in 2002, and various less notable rate changes… In overall, beside yearly sinusoid, CO2 has been rising by 0.1ppm/month in 1980-1994, and by 0.2ppm/month since 2012… Can these be observed in rate of Sea level changes ?
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2022, Seventh Warmest Year: Warming Slows Down
Posted by Andy May — January 7, 2023
Guest Post by Javier Vinós
It must be said that satellites measure a rate of sea level rise that is about twice that recorded by coastal tide gauges. Either the sea is rising more in the center than on the coasts, or there is a problem in measuring sea level rise to the center of the Earth that does not take into account what is happening at the bottom of the oceans.
So as I understand the data in the article:
Over the world, the sea rises cca 3 inches per century, while in America it raises 10 inches per century and in Alaska it drops. This means, that Alaska is rising, while southern part of North America is slowly sinking cca 7 inches per century…
This is called glacial rebound – as former ice age glaciers melted 10 000 years ago, the weight on the continent changed significantly and now it very slowly returns to some state…
I also remember similar conclusion, that someone has been showing a stone from 1600s or 1850s near Australia marking sea level of that time, but the island could rise or sink since then…
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Ocean Temps Warm Slightly December 2022
Posted 4 Hours Ago by Ron Clutz
2015-present: NH anomaly trending higher than SH, see blog post. No recent trend change in global (darker blue).
Unfortunately I’ve lost a link to a very interesting (non official) report on sea level rise around Sydney. It included photos of one beach on the Pacific Ocean shore about 60 years apart, along with the tide gauge figures from Fort Denison inside the harbour.
Both showed cyclic variations over time but no rise.
I hope the link below shows that up.
Photos are inconclusive without knowing what stage a tide was at.
Reblogged this on Calculus of Decay .
The basic problem is that the data is poor quality and measuring accurately is very difficult for all sorts of reasons. Even if everything else was static, producing accurate data would be tricky, but it is not. Data going back 100 years is extremely poor. Claiming correlations with poor data is meaningless.
[…] Sea level is stable around the world […]
Reblogged this on Climate Collections.
@P.A.Semi,
You seem not to know what you are talking about:
1. Sea-surface air temperature is strongly impacted by SST through the exchange of latent and sensible heat fluxes. As a result, SST follows the exact pattern of change as sea-surface air temperature. And in my plots above, it’s the pattern of change that matters. Furthermore, the top 200 -250 m of the World ocean represents a well-mixed layer known as Epipelagic Zone, where temperature does not change with depth, which means that the OHC of the top 300 m is tightly coupled to variations in SST and ocean surface air temperature. Hence, the claimed linear increase of the top 300-m OHC and its high correlation with atmospheric CO2 shown in my plots above makes no physical sense.
2. Sea-level rise (SLR), OHC, atmospheric CO2, and the UAH ocean-surface air temperature are all expressed in terms of z-scores (google z-score to learn what it means!). Z-score allows variables with different units to be plotted on the same graph while preserving their original pattern of change and temporal trends. So, SLR and OHC exhibit the same pattern of variation and slope (temporal trend) as the atmospheric CO2, which is quite different from the trend and pattern of change in the ocean-surface air temperature. This is physically impossible, if SLR and OHC were real measurements!
3. Independent studies of shoreline changes at hundreds of islands in the Pacific and Indian Oceans (where satellite altimetry claims the fastest sea-level rise has occurred during the past 29 years) failed to provide evidence for any sea-level rise over the past 40 – 100 years. Here are some recent references:
Duvat (2018) A global assessment of atoll island planform changes over the past decades: https://wires.onlinelibrary.wiley.com/doi/abs/10.1002/wcc.557
Kench et al. (2018) Patterns of island change and persistence offer alternate adaptation pathways for atoll nations: https://www.nature.com/articles/s41467-018-02954-1
Aslam & Kench (2017) Reef island dynamics and mechanisms of change in Huvadhoo Atoll, Republic of Maldives, Indian Ocean: https://www.sciencedirect.com/science/article/abs/pii/S2213305417300036
Ford (2013) Shoreline changes interpreted from multi-temporal aerial photographs and high resolution satellite images: Wotje Atoll, Marshall Islands: https://www.sciencedirect.com/science/article/abs/pii/S0034425713001065
Sea-level rise only appears to have occurred in computer models and manipulated datasets.
for thousands of years, sea level rise has slowed and is nearing an asymptote according to the data. This is what one would expect when an ice age ends. Duh.
First there’s a massive melt off of miles high glaciers. My house was under about five miles of ice back in the day (upper Midwest). As various ice dams burst, massive flows of melt water rush to the seas causing an impulse of water. This happens several times before Climate Spring is established. We are now in late Climate Summer or early to mid Climate Fall.
@Ted Nikolov
SST and near-surface air temperatures are not the same…
Their anomalies differ often, especially in Arctic…
Air temperature is most influenced by cloud cover and by wind bringing in warm/cold air from elsewhere, while SST rises/drops much more slowly…
About Z-Score – if you have two linearly rising variable series, their items have same Z-score regardless of original serie slope… (i.e. if serie B slope was twice different, the Z-score would not change…)
In lower-left panel of first image in these comments, blue and green lines being same just means both are somehow almost linearly rising, and if they are both rising linearly, their Z-score cannot differ…
While green is CO2 that is somehow measured, but blue is OHC (Ocean Heat Content) that is most probably just estimated? And they may estimate that depending on CO2 and not on actual temperature sampling?? How is that OHC derived ?
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