A good review of the tide gauge data accuracy and sea level rise is here at WUWT. The Author’s bottom line:
- Tide Gauge data is invaluable for localities in determining tide states, sea surface levels relative to the land, and the rate of change of those levels — the only Sea Level data of concern for local governments and populations.
- Tide Gauge data is only accurate to ±2 centimeters. All derived averages/means of tide gauge data including daily, weekly, monthly and annual means are also only accurate to ±2 centimeters. Claims of millimetric accuracy of means are unscientific and insupportable.
- Tide gauge data is worthless for determining Global Sea Level and/or its change unless it has been explicitly corrected by on-site CORS-like GPS reference station data capable of correcting for vertical land movement.
- The current standard for Tide Gauge data, the PSMSL GLOSS, is not corrected for vertical land movement, all studies based on this uncorrected PSMSL data producing Global Sea Level Rise findings of any kind — magnitude or rate-of-change — are based on data not suited for the purpose, are not scientifically sound and do not, cannot, inform us reliably about Global Sea Levels or Global Sea Level Change.
Posted in Sea Level
Tagged sea level
Nils-Axel Mörner. Sea Level Manipulation. International Journal of Engineering Science Invention, Volume 6 Issue 8 August 2017 pages 48-51.
Sea level changes is a key issue in the global warming scenario. It has been widely claimed that sea is rising as a function of the late 20th’s warming pulse. Global tide gauge data sets may vary between +1.7 mm/yr to +0.25 mm/yr depending upon the choice of stations. At numerous individual sites, available tide gauges show variability around a stable zero level. Coastal morphology is a sharp tool in defining ongoing changes in sea level. A general stability has been defined in sites like the Maldives, Goa, Bangladesh and Fiji. In contrast to all those observations, satellite altimetry claim there is a global mean rise in sea level of about 3.0 mm/yr. In this paper, it is claimed that the satellite altimetry values have been “manipulated”. In this situation, it is recommended that we return to the observational facts, which provides global sea level records varying between ±0.0 and +1.0 mm/yr; i.e. values that pose no problems in coastal protection.
“…NASA’s own data reveal that worldwide ocean levels have been falling for nearly two years,…” click here
” “Sea levels in South Florida could rise up to two feet over the next four decades”… No they can’t and this is not happening right now. “ click here for a full explanation at WUWT
Posted in Sea Level
Tagged sea level
Imagine. Miami is about to be completely inundated in only 0.78 feet of water! It will be a miracle….
The mean sea level trend is 2.39 millimeters/year with a 95% confidence
interval of +/- 0.43 mm/yr based on monthly mean sea level data from
1931 to 1981 which is equivalent to a change of 0.78 feet in 100 years.
But the above graph stops in 1981. So let’s go further south.
The mean sea level trend is 2.37 millimeters/year with a 95% confidence
interval of +/- 0.15 mm/yr based on monthly mean sea level data from
1913 to 2015 which is equivalent to a change of 0.78 feet in 100 years.
Why look! The trend line slope for Key West from 1913 – 2015 is exactly the same as for Miami….0.78 ft per 100 years.
For Miami to become a modern-day Atlantis a global flood would have to occur. Yes a global flood is certainly possible. But the above trend does not suggest anything close to a global flood. Exaggerated claims made such as this are unsupported at best and are nonsense as a practical matter.
“This past Friday, however, the U.S. Senate effectively announced it’s cool with Miami becoming a modern-day Atlantis. Senators — including Florida’s own “not a scientist” Marco Rubio — confirmed President Trump’s climate-change-bashing choice for Environmental Protection Agency (EPA) head, Scott Pruitt.” click here for more
At a breath-taking 0.24 mm/yr at that!
The mean sea level trend is 0.95 millimeters/year with a 95% confidence
interval of +/- 0.24 mm/yr based on monthly mean sea level data from
1923 to 2015 which is equivalent to a change of 0.31 feet in 100 years.