This important story, an inconvenient truth indeed, was not taken up by the Australian mainstream media, so let me summarise, as it sinks a major part of the climate change hysteria agenda. The US National Oceanographic and Atmospheric Administration (NOAA), has been collecting tidal data for decades, and from analysis has found that regardless of the issue of whether or not carbon dioxide levels have increased, ocean levels have remained constant at least since the 19^th century. The data sources are robust as well, from two hundred measurement stations, so there is little chance of bias factors from one locality throwing the general results out. As one will recall, the idea of rising sea levels, popularised in climate change literature and fiction, is a key premise of the idea that we face climatic doom, well symbolised by the image of the polar bear caught on melting ice. But, it is yet another myth.

https://www.naturalnews.com/2023-02-10-no-correlation-between-co2-and-ocean-levels.html

“For years, the global warming cult has shamed people for not believing in their religion of doom, for not agreeing that the oceans are rising, that the world is ending because of CO2. According to decades of tidal data collected by the National Oceanographic and Atmospheric Administration (NOAA), ocean levels have generally stayed the same for centuries, regardless of CO2 levels in the atmosphere.

When a minuscule increase in the ocean level is detected, it is observed over a century, and the rise is not even correlated with CO2 levels in the atmosphere. Tectonic activity, hurricane damage, the El Nino effect, and changes in ocean currents are just a few of the uncontrollable variables that affect sea level measurements.

Sea level tide gauge data suggests that CO2 has no effect on ocean levels

The NOAA collects coastal sea level tide gauge data at more than two hundred measurement stations across US coastlines, in the Gulf of Mexico, and at seven Pacific island groups and six Atlantic island groups. NOAA has data on ocean levels that dates back to the 19th century. During the 1970s, scientists were actually worried about global cooling and an impending ice age. At the turn of the 21st century, however, global warming and then climate change became the pressing issues of the day. In either event, the ocean levels have stayed generally the same, with populations thriving along the coastlines.

The NOAA tide gauge record at Battery, New York has been around for 160 years. This site has found a slow, steady increase in the sea level, but the rise is minuscule – 11 inches per century. At California’s coastal sites of San Diego, Los Angeles, La Jolla, and San Francisco, the average sea level rise is around four to nine inches per century, but even this minuscule rise has nothing to do with CO2 levels in the atmosphere.

The minuscule rise cannot be correlated with rising CO2 levels because the gradual increase occurred during both non-industrial times and during periods of high CO2 output. The slow, steady increase of the sea level occurred at these sites from 1855 and onward, long before the existence of coal-fired power plants, diesel trucks, private jets, and muscle cars. Additionally, the steady rise of the ocean water over the past century has occurred during both rapid temperature increases and periods of global cooling.

Eliminating and capturing CO2 will have no effect on the sea level

The United Nations Intergovernmental Panel on Climate Change (IPCC) warns the world that the sea level will rise significantly over the next decade, significantly more than it has over the past two centuries. However, if we follow the data during high CO2 output over sixty years, the sea level shouldn’t increase any more than it has over the past two centuries. The NOAA data contradicts IPCC’s hysteria.

Despite the spike in CO2 levels over the past sixty years due to human activities, the average sea level has stayed on the same course as it did before CO2 levels rose drastically. This is true across the world, from Atlantic City, New Jersey to Honolulu, Hawaii, to Bombay, India to St. Petersburg, Fl, all the way to Cauta, Spain, Sydney, Australia, and Slipshavn, Denmark.

“Even though the human influence on climate was much smaller in the past, the models do not account for the fact that the rate of global sea-level rise 70 years ago was as large as what we observe today,” said Dr. Steven E. Koonin, former Undersecretary for Science for the US government in 2014.

For example, over the next 100 years, the sea level in Cauta, Spain is expected to rise about three inches, as it has over the past centuries. There is no evidence to suggest a ten-foot rise in the sea level, as is projected by former NASA scientists James Hansen.

In Hawaii, the sea level is at the mercy of local plate tectonic movements and global ocean currents. Despite all the shifts in the land and ocean movement over the past century, Hawaii has only observed a tidal rise of 5.6 inches since the year 1900. This minuscule rise has nothing to do with the jump in CO2 levels in the Earth’s atmosphere over the past sixty years.

The greatest increase in sea level appears to be taking place in Atlantic City, New Jersey. The 16-inch increase in the sea level over the past century cannot be directly correlated to rising CO2 levels due to natural changes that took place during the 1988 El Niño. According to the data, the El Niño effect over the Pacific Ocean had the greatest influence on the sea level rise, and was immediately followed by a five-year drop in the sea level at the Atlantic City site.

One of the most interesting trends in sea level over the past century is at the Sitka, Alaska site. The sea level here has steadily trended downward over the decades, not upward. If the trend continues, the sea level will fall nine inches over the next 100 years at this site. Sitka, being 100 miles from Glacier Bay, would be one of the first sites to show a massive rise in the sea level — if melting glaciers were actually causing sea levels to rise. Funny enough, Alaska is gaining seashore and is projected to continue gaining seashore, in the face of high CO2 levels in the atmosphere.

The only real threat that populations will have to adapt to is the threat of hurricanes along heavily-populated coastlines. Coastal cities should not have to worry about melting glaciers and rising tides for tens of thousands of years, but they do face the natural threat of hurricanes and tsunamis, and – if the cities are built on an active volcano – then the natural tectonic activity might be the most pertinent threat. The global warming hysteria only robs our communities of tax dollars, destroys our energy diversity and national sovereignty, and distracts us from properly adapting to natural disasters.”

 

https://www.cfact.org/2023/01/09/sea-level-is-stable-around-the-world/

 

“Sea level is stable around the world

By Dr. Jay Lehr, Dennis Hedke |January 9th, 2023|

We have been studying climate change and potentially associated sea level changes resulting from melting ice and warming oceans for a half century. 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.

Tidal gauges at the Battery (https://tidesandcurrents.noaa.gov/sltrends/sltrends_station.shtml?id=8518750) and Kings Point (https://tidesandcurrents.noaa.gov/sltrends/sltrends_station.shtml?id=8516945) show sea level rising at a pace of 11 inches per century (https://tidesandcurrents.noaa.gov/sltrends/). Both locations show a steady pace of increase, with the same pace of increase holding steady despite periods of relatively rapid temperatures increase and periods of cooling. The Battery measurements date back to 1855, showing the same pace of sea level rise well before the existence of coal power plants and SUVs.

NOAA data provide assessments with a 95% confidence level at all measured locations which demonstrate the consistent behavior of location-specific sea level rise over time. The 2016 updated NOAA tide gauge data include four long-term periods between 92 and 119 years for California coastal locations at San Diego, La Jolla, Los Angeles and San Francisco. The actual measured steady rates of sea level rise at these locations vary between four inches and nine inches per century.

In contrast to the steady but modest rise in sea level, revealed in long-term measurements, the United Nations Intergovernmental Panel on Climate Change (IPCC) speculates that sea level will almost immediately begin rising significantly more than in the past and present. NOAA records contradict such claims. This pattern of steady but modest sea level rise extends throughout the world, throughout times of increasing atmospheric carbon dioxide concentrations, and throughout periods of accelerated warming and cooling.

 

The IPCC and global warming activists have a difficult time scientifically supporting speculation about accelerating sea level rise, as warming temperatures have yet to push sea level rise beyond one foot per century. Current sea level trends are not significantly different from what they were seven to nine decades ago, when atmospheric CO₂ levels were 310 parts per million by volume (ppmv) or less.[1] Dire predictions made decades ago of dramatically accelerating polar ice loss, and an ice-free Arctic Ocean have not come to pass.[2] As Dr. Steven E. Koonin, former Undersecretary for Science for the Obama administration, noted in 2014, “Even though the human influence on climate was much smaller in the past, the models do not account for the fact that the rate of global sea-level rise 70 years ago was as large as what we observe today.”[3]

 

Fortunately, we don’t need to wonder who is right and who is wrong in the debate over future sea-level rise. We can test the rising-seas hypothesis with real data collected from 10 coastal cities with long and reliable sea level records. Those cities are Ceuta, Spain; Honolulu, Hawaii; Atlantic City, New Jersey; Sitka, Alaska; Port Isabel, Texas; St. Petersburg, Florida; Fernandina Beach, Florida; Mumbai/Bombay, India; Sydney, Australia; and Slipshavn, Denmark.

We can test the rising-sea hypothesis with real data collected from ten coastal cities with long and reliable sea-level records.

 

The cities appear on the map below [see article] along with the data for each city presented on separate graphs below. The graphs include the following elements:

▪  CO₂ concentrations measured in the atmosphere over the past century, signified by the green lines in the graphs. (This line is the same in all the graphs.)

▪  Monthly mean sea-level data for each city, signified by the blue lines, and

▪  The “linear fit,” signified by the red line, representing the best estimate of past and future average sea levels. We also include the 95% Prediction Intervals.

 

The Ceuta, Spain data show about as flat a trend as we can observe. Most notably, the data show no correlation between CO₂ concentration and sea-level rise. If the current trend continues for the next century, sea level in Ceuta will rise only three inches. This is in sharp contrast to the 10-foot global rise in sea levels recently projected by former NASA scientist James Hansen.[5]

Hawaii, like some other regions, can see significant year-to-year fluctuations in sea level because of global oceanic currents or local plate tectonic movements. However, Honolulu has seen an average sea-level rise of only 5.6 inches since 1900. The sea level around Honolulu is projected to rise a mere 5.6 inches in the next 100 years, once again with no correlation to CO₂ levels.

Analysis

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 CO₂concentrations 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 .[9]

Survey from three sources:

▪  1958–present data are from measurements at the Mauna Loa Observatory in Hawaii, at 3,400 meters altitude in the Northern subtropics.[10]

▪  1850–1958 data are from ice core data.[11]

▪  1800–1850 CO₂ data are from a different ice core data set.[12]

  Sea-level measurements for the ten coastal city graphs represent monthly data points compiled from the National Oceanic and Atmospheric Administration (NOAA) and the Permanent Service for Mean Sea Level (PSMSL), based in Britain. The database from which the graphs are drawn consists of data from 375 long-record tide-gauges around the globe, selected by NOAA for trend analysis.[13]

 Sea levels vary widely across the globe. Values for the initial levels in the graphs refer to Mean Sea Level (MSL) data, established by the NOAA Center for Operational Oceanographic Products and Services (NOAA-CO-OPS).