Archives par mot-clé : Sea level

New Studies Suggests Sea Levels Are Lower Today Than They Were Even During The Little Ice Age

by K. Richard, June 18, 2020 in NoTricksZone


Coastal history analyses increasingly suggest sea levels are lower today than at any time in the last 7000 years – even lower than the 1600s to 1800s.

Recently we compared cartology from the 17th to 19th centuries to direct aerial images of coastal positions today. Rather surprisingly, there seemed to be more land area below sea level a few hundred years ago.

For example, an 1802 nautical map of New York City and Long Island shows there may have been more open waters in this region during the Little Ice Age than in 2019.

 

Image Source: Amazon.com

Shoreline analysis from India also suggests the coasts were further inland during the 1600s than they are today (Mörner, 2017).

Study: As Sea Levels Rise, Island ‘Drowning’ Is Not Inevitable

by A. Williams, June12, 2020 in ClimateChangeDispatch


Coral reef islands across the world could naturally adapt to survive the impact of rising sea levels, according to new research.

The increased flooding caused by the changing global climate has been predicted to render such communities – where sandy or gravel islands sit on top of coral reef platforms – uninhabitable within decades.

However, an international study led by the University of Plymouth (UK) suggests that perceived fate is far from a foregone conclusion.

The research, published in Science Advances, for the first time uses numerical modeling of island morphology alongside physical model experiments to simulate how reef islands – which provide the only habitable land in atoll nations – can respond when sea levels rise.

Pacific Island states will not longer play the patsies for the climate alarmists

by P. Homewood, May 27, 2020 in NotaLotofpeopleKnowThat


The science is settled. The time for debate is over. It’s actually better than we thought. The Pacific islands are not sinking under rising sea levels, in fact, the peer-reviewed science shows the exact opposite, the majority of low lying islands are either stable or increasing in size — something even ABC FactCheck was forced to concede.

Nevertheless, this has not stopped climate alarmists led by the Portuguese socialist and UN General Secretary Guterres from denying the peer-reviewed science and exploiting Pacific Island nations, by using them as patsies to peddle fear and misinformation with discredited claims of ”sinking islands”.

And so far, the Pacific islanders have been happy to play along; perhaps driven by a cargo-cult mentality, believing if they utter the magic words ”climate change” and pose for the international media forlornly staring out over the sea, that they might be rewarded with cash handouts from the UN Green Global Climate fund.

But that was all before the Wuhan Flu.

Sea Level Rise Is Accelerating (If You Ignore Pre 1970 Data!)

by P. Homewood, February 19, 2020 in NotaLotofPeopleKnowThat


This has to go down as one of the most fraudulent climate studies yet!

Want to know how sea level in your area is changing due to global warming and other factors? Our ‘report cards’ can help. Updated by the Virginia Institute of Marine Science each year as annual tide-gauge data become available, they display recent sea-level trends and project sea-level height to the year 2050 for 32 localities along the U.S. East, Gulf, West, and Alaskan coasts.

Report Card Components

Our report cards have 3 components: the 2050 projection, recent trends in the rates of sea-level change, and an explanation of processes affecting sea level at each locality.

The annotated chart below, using the latest data from Norfolk, Virginia, briefly explains the data and statistical approaches we use in our 2050 projections. Visit an individual locality for details on all its report-card components. You can also compare sea-level trends, projections and processes among localities and by region. For full technical details, read our report.

https://www.vims.edu/research/products/slrc/index.php

Jakarta is not an Exemplar of Sea Level Rise

by K. Hansen, January 25, 2020 in WUWT


Ted Nordhaus has an excellent article in the Wall Street Journal titled “Ignore the Fake Climate Debate”.

[  It may or may not be pay-walled for you — if it is, try searching the title in your search engine and use the link provided by Google/Bing/whatever — it may let you in or see here. ]

 

Jakarta, Indonesia, is not an exemplar of rising sea levels    

 Jakarta is a good proxy for many of the problems that Asian cities are having with sea levels — relative sea levels.   Is Relative Sea Level a problem specific to Asian cities?  No, but it is a common problem to Asian mega-cities as can be seen in this figure:

North Atlantic Sea Levels Have Been Falling At A Rate Of 7.1 mm/yr Since 2004…In Tandem With 2°C Cooling

by K. Richard/Chafik et al. 2019, January 20, 2020 in NoTricksZone


Rapid cooling in the North Atlantic has reversed regional sea level changes and has apparently spread to the Greenland ice sheet

Image Source: Chafik et al. (2019)

Despite stressing global sea level rise is worrisome and due to anthropogenic warming, Chafik et al. (2019) report a distinct cooling trend in the North Atlantic that coincides with a transition to falling regional sea levels since 2004.

19 Papers Published In 2019 Affirm Sea Levels Were METERS Higher Than Today 4-8 Thousand Years Ago

by K. Richard, January 16, 2020 in NoTricksZone


The onslaught of paleoclimate evidence for warmer-than-now Mid-Holocene climates – when the Earth’s sea levels were meters higher than they are today –  stormed through 2019.

There were 107 scientific papers published this past year indicating today’s warmth isn’t even close to being unusual or unprecedented when compared to the climates of the last centuries to millennia.

As illustrated below, there were also 19 papers affirming today’s sea levels are among the lowest of the last ~8000 years.

This is added to the list of nearly 100 scientific papers published in the last handful of years indicating Mid-Holocene sea levels were multiple meters higher than they are today due to the much more extensive glacier and ice sheet melt occuring during these millennia.

A Geological Perspective on Sea Level Rise Acceleration

by David Middleton, December 9, 2019 in WUWT


There have been at least three recent peer-reviewed papers asserting an anthropogenic acceleration in the rate of sea level rise (SLR): Church & White, 2006 (CW06), Church & White, 2011 (CW11) and Nerem et al., 2018 (N18). N18 only covers the satellite era (since 1993) and might actually be correct, albeit irrelevant. The primary culprits in the SLR acceleration scam are CW06 and CW11. Two other recent peer-reviewed papers clearly shoot down the notion of a recent anthropogenic acceleration: Jevrejeva et al., 2008 (J08) and Jevrejeva et al., 2014 (J14). This post will focus on CW11 (updated through 2013) and J14.

J08 and J14 indicate that the acceleration, to the extent there is one, started 150-200 years ago, consistent with the end of neoglaciation and that a quasi-periodic fluctuation (~60-yr cycle) is present. CW06 and CW11 also note the 19th Century acceleration; but also assert a more recent acceleration, presumably due to anthropogenic global warming. This SLR acceleration is, at worst, innocuous.

Figure 1. Jevrejeva et al., 2014 (red) and Church & White, 2011 (green).
….

Cartology Affirms Relative Sea Levels Were Similar To Or HIGHER Than Now During The Little Ice Age

by K. Richard, December 5, 2019 in NoTricksZone


Surprisingly accurate nautical maps created the 17th to 19th centuries strongly suggest coastal land area in both hemispheres were quite similar to today’s. There is even evidence relative sea levels were higher than now back then.

Image Source: Etsy.com

Globally, coasts have grown since the 1980s

Between 1985 and 2015, satellite observations indicate the world’s coasts gained 13,565 km²  more land area than they had lost to the seas (Donchyts et al., 2016).

This means more coastal land area is above sea level today than in the 1980s.

This surprises scientists, as they “expected the coast would start to retreat due to sea level rise,” but instead they observed “coasts are growing all over the world.”

New Paper Presents Photo Evidence Affirming Equatorial Region Sea Levels Have FALLEN Since The 1600s

by K. Richard, November 29, 2019 in NoTricksZone


In a new paper (Mörner, 2019, expanding upon Mörner, 2017), photo evidence confirms sea levels in 5 studied equatorial regions have fallen by about 60 cm since the 17th century…and remained stable since the 1970s.

Another new study (Haryono et al., 2019) of sea level change in equatorial Indonesia also supplies photos of marine terrace biomarker evidence affirming sea levels were about 5 meters higher than they are today between 5000 to 3000 years before present, suggesting “it means it was warmer than the present day” back then.

4 New Papers, One Alarm-Dispelling Conclusion: Future Sea Level Rise May NOT Threaten Islands After All

by K. Richard, November 4, 2019 in NoTricksZone


As reported in 4 separately-published papers, scientists have discovered a mechanism whereby islands can build themselves up naturally, thwarting the threat of sea level rise.  Tuck et al. (2019) affirm the implications of island building are profound, as it will offset existing scenarios of dramatic increases in island flooding.”

Earlier this year, Duvat (2019) identified a global trend in island shoreline net growth despite recent sea level rise.

The welcome news is that none of the islands larger than 10 ha – and just 1.2% of the 334 islands larger than 5 ha – have decreased in size since the 1980s. Nearly 90% of the world’s islands have been stable to expanding in coastal area during recent decades.

Antarctic ice cliffs may not contribute to sea-level rise as much as predicted

by Massachusetts Institute of Technology, October 21, 2019 in ScicnceDaily


Researchers report that in order for a 90-meter ice cliff to collapse entirely, the ice shelves supporting the cliff would have to break apart extremely quickly, within a matter of hours — a rate of ice loss that has not been observed in the modern record.

A realistic picture

The results suggest that the Earth’s tallest ice cliffs are unlikely to collapse catastrophically and trigger a runaway ice sheet retreat. That’s because the fastest rate at which ice shelves are disappearing, at least as documented in the modern record, is on the order of weeks, not hours, as scientists observed in 2002, when they captured satellite imagery of the collapse of the Larsen B ice shelf — a chunk of ice as large as Rhode Island that broke away from Antarctica, shattering into thousands of icebergs over the span of two weeks.

“When Larsen B collapsed, that was quite an extreme event that occurred over two weeks, and that is a tiny ice shelf compared to the ones that we would be particularly worried about,” Clerc says. “So our work shows that cliff failure is probably not the mechanism by which we would get a lot of sea level rise in the near future.”

Le GIEC en est virtuellement certain…

by Prof. Dr. Jean N., 11 octobre 2019 in ScienceClimatEnergie


Le dernier rapport spécial du GIEC vient de sortir. Ce rapport, appelé SROCC (“Special Report on the Ocean and Cryosphere in a Changing Climate“), a été approuvé à la 51e session du GIEC tenue les 20 et 23 septembre 2019. Il a déjà fait beaucoup parler de lui dans les médias. Le résumé du rapport à l’intention des décideurs (SPM) a été présenté lors d’une conférence de presse le 25 septembre 2019. Pour ceux qui comprennent l’anglais, qui ont une formation scientifique et surtout qui ont le temps de lire 1170 pages, le fichier PDF de ce rapport est disponible sur le site du GIEC. Le présent article analyse le chapitre 4 de ce rapport, celui qui traite de la montée des océans. Rassurez-vous, nous n’allons pas critiquer la montée du niveau des océans qui est un phénomène bien réel. Nous allons plutôt montrer que les auteurs ont étrangement omis certaines explications qui relativisent la portée de leurs conclusions, notamment concernant la cause de la hausse du niveau marin.

1. Structure du chapitre 4

Ce chapitre 4 consiste en 168 pages et a pour titre “Élévation du niveau de la mer et conséquences pour les îles, les côtes et les communautés de faible altitude“. Les deux auteurs coordonnateurs de ce chapitre sont Michael Oppenheimer (USA) et Bruce Glavovic (Nouvelle Zélande). Les auteurs principaux sont au nombre de 13 et les auteurs contributeurs sont au nombre de 31. Au final, 46 scientifiques ont donc contribué à écrire ce chapitre. Rien que pour ce chapitre les auteurs citent un peu plus de 1500 références, essentiellement des articles scientifiques.

Qu’apprend-t-on dans le chapitre 4?

Pour faire simple, nous y apprenons : (1) Que le niveau moyen des océans monte toujours et que la vitesse s’accélère; (2) Que cette montée du niveau marin est essentiellement causée par l’homme; (3) Que l’on peut calculer ce qui va se passer dans le futur grâce aux modèles numériques; (4) Que l’on peut éventuellement se protéger de la hausse du niveau marin par toute une série de mesures.

Nous allons maintenant nous focaliser sur les points n°1 (montée du niveau) et n°2 (les causes).

2. La montée du niveau moyen des océans selon le SROCC

Nearly Half Of 53 Tidal Gauges Show Negative Sea-Level Rise

by K. Richard, Sep. 10, 2010 in ClimateChangeDispatch


The West Coast of North America has 20 long-term (90+ years) tide gauges measuring relative sea-level changes.

The East Coast has 33. Of the 53 total tide gauges, 45% (24) are negatively accelerating, 14 document falling sea levels, and just 11 have sea levels rising more than 3 mm/yr.

mage Source: Boretti, 2019

A cooling/non-warming North America

A few months ago, Gan et al. (2019) reported that the North American continent as a whole (180-0°, 15-60°N) “is one of the major cooling centers” in the Northern Hemisphere, with temperatures dropping after 1998 and no significant net change since the early 1980s apparent.

Historical European Sea Level Records

by Kip Hansen, Sep. 6, 2019 in WUWT


I have been working on another sea level related essay and in the process stumbled upon a paper published in 1990 by thePermanent Service for Mean Sea Level (PSMSL).  The title is: “On The Availability Of  European Mean Sea Level Data  by P.L. Woodworth, N.E. Spencer and G. Alcock  (1990)”,  The paper is listed on the PSMSL page of “Publications Relevant to the PSMSL and GLOSS” but is not available there.  [ a  .pdf is available here  courtesy of the library at the University of New Brunswick, Canada ].

La hausse du niveau de la mer accélère-t-elle l’érosion des côtes? (3/3)

by Prof. Y. Battiau, 30 août 2019 in ScienceClimat Energie


 

6. Conclusion

A la question initiale qui avait été posée – “la hausse du niveau de la mer accélère-t-elle l’érosion des côtes?”- on peut répondre qu’elle ne joue qu’un rôle mineur, comparé à celui des tempêtes. Dans l’état actuel des recherches, on peut dire aussi que le réchauffement climatique n’augmente pas la fréquence et l’intensité des tempêtes. Tout cela va à l’encontre de ce que l’on entend habituellement dans les médias, mais le scientifique a le devoir de rétablir la réalité des faits.

Pourtant, on ne peut nier que les risques littoraux s’aggravent dans beaucoup de régions et que leur gestion est de plus en plus coûteuse. Mais la plupart du temps, cette aggravation résulte de facteurs anthropiques. Alors que les hommes ont longtemps évité la proximité immédiate du littoral, ils ont depuis plus de 150 ans, entrepris d’installer habitations, infrastructures et complexes industriels le plus près possible de la côte. Face à cette vulnérabilité accrue, il a fallu ensuite “défendre contre la mer” tous ces biens, une stratégie qui n’a fait que renforcer ou déplacer l’érosion marine. La seule façon de prévenir efficacement les risques littoraux est de travailler avec les processus naturels et surtout de respecter la ressource sédimentaire du système côtier, en évitant d’entraver la mobilité naturelle du trait de côte. Mais ce serait là l’objet d’un autre article…

La hausse du niveau de la mer accélère-t-elle l’érosion des côtes? (1/3)

by Y. Battiau-Queney, 15 août 2019 in ScienceClimatEnergie


Il est courant de lire et d’entendre que la hausse du niveau de la mer, l’une des conséquences les plus manifestes du réchauffement climatique, va accélérer l’érosion de nos côtes, menacer de submersion marine de vastes zones littorales urbanisées et faire disparaître nombre d’îles basses habitées. Ces craintes sont-elles justifiées? Comme un consensus ne vaut pas vérité scientifique, on va essayer de démêler le vrai du faux en partant de l’état des connaissances scientifiques sur la hausse du niveau de la mer et analyser ses effets possibles sur les processus d’érosion des côtes.

 

1/ Que sait-on de la hausse du niveau de la mer ?

1.1. État des connaissances sur les variations passées et présentes du niveau de la mer à l’échelle mondiale

Une bonne synthèse récente sur les causes et l’ampleur de la hausse du niveau de la mer se trouve dans Cazenave et Le Cozannet (2014). On y trouvera une très abondante bibliographie antérieure à 2013. Les méthodes utilisées par les scientifiques pour évaluer la tendance moyenne de l’élévation du niveau de la mer dépendent de la période considérée. A l’échelle du Pléistocène (1 800 000 ans) et de l’Holocène (10 000 ans) on dispose d’archives sédimentologiques (repérage d’anciennes plages “soulevées”, analyse de niveaux tourbeux recouverts de sédiments marins, stratigraphie et datation de récifs coralliens …) et de données archéologiques, particulièrement riches sur les côtes méditerranéennes. On sait qu’à plusieurs reprises, pendant les phases interglaciaires du Pléistocène, le niveau de la mer a été supérieur à l’actuel de 5 à 10 m au moins (Planton et al., 2015). À partir du milieu du 19ème siècle, on utilise les données souvent précises des marégraphes installés principalement dans les ports de l’hémisphère nord. Elles fournissent les altitudes relatives du niveau de la mer par rapport aux terres émergées. Depuis 1993, les données satellitaires fournissent des altitudes absolues du niveau de la mer par rapport à l’ellipsoïde terrestre de référence et permettent d’avoir une vision beaucoup plus globale des variations du niveau des océans à toutes les latitudes et longitudes.

Tableau 1 : variations du niveau de la mer indiquées par les marégraphes (sources: SONEL et GLOSS; Wöppelmann et al., 2014 pour Marseille) (ND= non documenté). Les données dans les colonnes sont exprimées en mm/an.

Malfeasant Omissions? German Flagship ARD Broadcasting One-Sided, Drama-Making Sea Level Reporting

by Dr. S. Lüning, August 9, 2019 in NoTricksZone


What follows is another example of the tricks the mainstream media use to produce fake drama and urgency concerning sea level rise and climate change – namely omissions – and how geologist Sebastian Lüning held their feet to the fire.

Dr. Sebastian Lüning wrote a complaint to German ARD public broadcasting concerning its December 2, 2018, one-sided reporting of the Indian island of Ghoramara and the sea level rise it is allegedly experiencing. The €6.9 billion euro publicly funded, 22,612-employee ARD is the German equivalent to the UK’s BBC.

What follows is the exchange between Lüning and the ARD editorial staff:

With Sea-Level Rise, Climate Science Meets Reality

by J. Weatherall, August 6, 2019 in ClimateChangeDispatch


Numerous satellites utilized by Australian agencies and research bodies are able to take a measure of sea level by way of an altimeter. However, according to the CSIRO, it should not be overlooked that the signal to do so requires

# A satellite in an orbit which repeats the same ground track very closely (within about 1 kilometer)

# A radar system to measure the distance from the satellite to the sea surface to high accuracy. TOPEX/Poseidon and Jason-1 use two radar frequencies, Ku band (13.6GHz) and C band (5.3Ghz).

# A tracking system capable of locating the satellite vertically at any time to within a few centimeters. Some of the components of such a system are:

1/ Systems (usually a combination of GPS, satellite laser ranging and the French DORIS system) to locate the satellite

2/ A high-quality gravity model

3/ A model of the drag from solar wind and the atmosphere

4/ Suitable software to combine all of the above

Other corrections to correct the range:

On the satellite:

1/ A water vapor radiometer to measure the amount of water vapor between the satellite and the sea surface (the water vapor slows down the radar pulse, causing the raw measurement to be too long)

2/ Measurement of the range at two frequencies to estimate the “ionospheric correction” — that is, the degree to which the radar pulse is slowed down by free electrons in the ionosphere

3/ The troughs of waves contribute more to the radar reflection than the crests, so we need correction for this. This is estimated from the wind speed and the wave height, both of which can be estimated from the characteristics of the returned radar pulse.

On the ground:

1/ Ocean tide models to convert the raw altimeter measurement to “de-tided”

2/ Estimates (from a model) of the atmospheric pressure. This is used to calculate a correction to the radar range to compensate for the atmosphere slowing down the radar pulse

3/ A correction for the “inverse barometer” effect, where sea level is depressed in areas of high atmospheric pressure, and vice versa.

No one besmirches the accomplishments of the engineering and technology involved.

However, it is a basic truism that the greater the number of separate corrections needing to be applied, the greater the risk of miscalculation.

 

Study: Pacific Islands Will Survive Climate Change

by Eric Worrall, July 17, 2019 in WUWT


Who could have imagined that islands which survived rapid sea level rise at the end of the last ice age have no problem coping with changes in sea level?

Media Release
From: University of Auckland

Pacific atolls can adapt to rising seas and extreme storms – new study

Low-lying Pacific islands in atoll archipelagos such as Tuvalu, Tokelau and Kiribati are likely to adapt to the effects of climate change rather than simply sink beneath the waves, a new study shows.

Tuvalu, Tokelau and Kiribati are widely considered under threat from rising seas and severe storms due to climate change with their residents becoming ‘climate refugees’.

Researchers from the University of Auckland’s School of Environment recreated a scale model of tiny Fatato Island on the southeast rim of Funafuti Atoll in Tuvalu to test the ability of the real island to withstand predicted climate affects.

The study simulated higher sea levels and storm-generated waves up to 4m in a 20m-long water chute or ‘flume’ to replicate real-world sea levels of 0.5m and 1m in a purpose built laboratory at the University of Plymouth in the United Kingdom.

A beach at Funafuti atoll, Tuvalu, on a sunny day. Author Stefan Lins, source Wikimedia

The Holocene Sea Level Highstand

by David Middleton, June 6 , 2019 in WUWT


What is a highstand?

A highstand is one phase of the sea level cycle (AAPG Wiki)

  • Rising
  • Highstand
  • Falling
  • Lowstand

The highstand is the maximum sea level achieved during the cycle.

The Holocene Epoch

The Holocene Epoch was recently formally subdivided into three stages:

  1. Greenlandian Stage = Lower or Early-Holocene. 11.70 ka to 8.33 ka
  2. Northgrippian Stage = Middle or Mid-Holocene. 8.33 ka to 4.25 ka
  3. Meghalayan Stage = Upper or Late-Holocene. 4.25 ka to present

The abbreviation “ka” refers to thousands of years ago. Lower, Middle and Upper are generally used when referring to rock-time units. Early, Mid and Late are generally used when referring to time units (Haile, 1987). Prior to the formal subdivision, Lower/Early, Middle/Mid and Upper/Late were commonly used; however there was no formal nomenclature. The fake word, “Anthropocene” is not used by real geologists.

There is also an informal climatological subdivision of the Holocene:

  • Preboreal 10 ka–9
  • Boreal 9 ka–8 ka
  • Atlantic 8 ka–5 ka
  • Subboreal 5 ka–2.5 ka
  • Subatlantic 2.5 ka–present

Source: Wikipedia

Why would there have been a Mid- to Late-Holocene highstand?

Figure 1. Holocene sea level curves from Moore & Curray, 1974.

Another climate lie bites the dust – No, Honolulu’s beaches aren’t going to disappear in 20 years

by Aylin Woodward, April 25, 201 in WUWT


In May 2017, high tides engulfed parts of the iconic Waikiki beach, edging dangerously close to waterfront hotels. This kind of high-tide flooding, often called a king tide or sunny-day flood, occurs when ocean water surges to higher levels than coastal infrastructure was designed to accommodate. In that case, water levels rose 2.5 feet above average in Waikiki, drowning nearby roads and sidewalks.

According to a 2017 report (which was updated in September 2018), Hawaii’s state capital and Waikiki Beach – along with other coastal strips on Hawaii’s five islands – are expected to experience frequent flooding within 15 to 20 years.

“This flooding will threaten $5 billion of taxable real estate; flood nearly 30 miles of roadway; and impact pedestrians, commercial and recreation activities, tourism, transportation, and infrastructure,” Shellie Habel, lead author of the 2017 study, said in a release.

Now, Hawaii state lawmakers are taking steps to shore up the state’s beaches and coastal cities. A new bill that mandates a statewide shore protection program has passed both houses of Hawaii’s state legislature, and will soon makes its way to the governor’s desk for approval.


All well and good that they want to improve beach resilience. But, the claim that ” Hawaii’s iconic Waikiki Beach could be engulfed by the ocean in 20 years ” is totally bogus.

Here is why:

 

Isle de Jean Charles & Sea Level Rise

by P. Homewood, April 20, 2019 in NotaLotOfPeopleKKnowThat


The Isle de Jean Charles, Louisiana. It’s been largely submerged beneath the sea over the last 6 decades. The program gives the definite impression that the main reason for this inundation is sea level rise due to melting ice and thermal expansion of the oceans – driven by man-made climate change. Attenborough does mention oil extraction as a cause but his narrative is lost to the general tone of the messaging that this is a “climate catastrophe” and that the families driven from their homes in this part of Louisiana are some of the world’s first “climate refugees”. This is palpable bullshit.

 

https://tidesandcurrents.noaa.gov/sltrends/sltrends.html

CA sea level rise alarmist study ignores 30 years of NOAA data with no coastal sea level rise acceleration

by Larry Hamlin, March 13, 2019 in WUWT


NOAA tide gauge data measurements exist for 17 locations along the California coast with 8 of these locations having actual measured sea level rise data covering periods for more than 70 to 120 years in duration.

This measured data shows that none of these California locations are experiencing coastal sea level rise acceleration since climate alarmist first made such erroneous and flawed sea level acceleration claims before the U.S. Senate in 1988.

Climate alarmists and their supporting media conveniently conceal the fact that their flawed claims have been hyped for the last 30 years as they continue to try again and again to make the same repeated but flawed claims apparently hoping that the public will forget their long track record of failure and exaggeration.

NOAA measured tide gauge data shows that coastal sea level rise at Ca. locations varies between 3 to 12 inches per century and have remained at those levels during the long measurement periods during which actual measured data have been recorded with a sample of that measured data shown below for San Diego, La Jolla, Los Angeles and San Francisco.