Sea levels rise slows — ‘coincides with a plateau in Earth’s mean surface temperature’ – ‘Over the last decade a [sea level rise] slowdown of this rate, of about 30%, has been recorded’
Climatologist Dr. Judith Curry:
Can someone then tell me how you can infer that sea level rise is accelerating due to AGW, when compared with sea level rise for the first half of the 20th century?
It is clear that natural variability has dominated sea level rise during the 20th century, with changes in ocean heat content and changes in precipitation patterns.
Once again, the emerging best explanations for the ‘pause’ in global surface temperatures and the slow down in sea level rise bring into question the explanations for the rise in both in the last quarter of the 20th century. And makes the 21st century of sea level rise projections seem like unjustified arm waving.…
Play climate model computer games! Check out NOAA’s ‘Sea Level Trends’ webpage
…Warmist claim: ‘Sea level rise is already happening, and its continuation is inevitable’ – Reality Check: ‘Sea level has been rising for 20,000 years – when it was 120 metres lower and people walked across the Bering Strait. It has nothing to do with Mann-made CO2’
New paper finds sea levels were much higher than the present during almost all prior interglacials over past 5.3 million years – Published in Nature
New paper finds sea levels were much higher than the present during almost all prior interglacials over past 5.3 million years
http://hockeyschtick.blogspot.com/2014/04/new-paper-finds-sea-levels-were-much.html
A paper published today in Nature reconstructs sea levels over the past 5.3 million years and shows that sea levels were higher than the present during almost every interglacial period over the past 5.3 million years. Sea levels at present during the current interglacial are indicated as the added red horizontal line at zero meters on Fig. 2 below, and excursions above this line indicate sea levels during past interglacials as much as 50+ meters [164+ feet] higher than present sea levels. Thus, there is no evidence that sea level rise during the present interglacial is unprecedented, unnatural, unusual or any different from that which occurred in prior interglacials, or any evidence of influence by man on sea levels.
Fig. 2 with added red horizontal lines show present sea levels. Horizontal axis is thousands of years before the present.
The last interglacial ~100,000 years ago [Eemian] had sea levels between 16-31 feet higher than the present, although it appears as a tiny blip above the red line in the graph a much more compressed scale above, but is better appreciated by this graph from another recent paper:
Sea levels during the last interglacial ~120,000 years ago were up to 5 meters higher than the present in this location and up to 9.5 meters higher at other locations
It is well known that interglacials have occurred at 100,000 year intervals over the past ~1 million years, and at intervals of ~44,000 years from ~1 million to 2.5 million years ago.
The primary purpose of the paper is to help solve the mystery of what causes ice ages, yet appears to only deepen the mystery. Instead, the authors find a ~550,000 year gap between the onset of cooling and glaciation, whereas these were previously assumed to occur at the same time.
The authors note, “We find that deep-sea temperature and sea level generally decreased through time, but distinctly out of synchrony, which is remarkable given the importance of ice-albedo feedbacks on the radiative forcing of climate,” thus implying that there are major problems with current global warming theory regarding ice-albedo positive feedbacks and radiative forcing.
Crucial new information about how the ice ages came aboutDate: April 16, 2014Source: University of SouthamptonSummary: Scientists have discovered new relationships between deep-sea temperature and …
New paper finds sea levels were significantly higher than the present for ~10,000 years during the last interglacial – Published in Quaternary Research
Study reconstructs sea levels in the Arabian/Persian Gulf over the past 200,000 years and finds that during the last interglacial [Eemian, MIS 5.1-5.5 below] around 120,000 years ago, sea levels were as much as 5 meters [16 feet] higher than the present for around 10,000 years. The authors find this sea level rise was almost entirely eustatic [from the melting of glaciers] rather than tectonic movements, which were found to be “negligible.”…
Social Cost of Carbon Inflated by Extreme Sea Level Rise Projections
Social Cost of Carbon Inflated by Extreme Sea Level Rise Projections
http://www.cato.org/blog/social-cost-carbon-inflated-extreme-sea-level-rise-projections
Patrick J. Michaels and Paul C. “Chip” Knappenberger
Global Science Report is a feature from the Center for the Study of Science, where we highlight one or two important new items in the scientific literature or the popular media. For broader and more technical perspectives, consult our monthly “Current Wisdom.”
As we mentioned in our last post, the federal Office of Management and Budget (OMB) is in the process of reviewing how the Obama administration calculates and uses the social cost of carbon (SCC). The SCC is a loosey-goosey computer model result that attempts to determine the present value of future damages that result from climate change caused by pernicious economic activity. Basically, it can be gamed to give any result you want.
We have filed a series of comments with the OMB outlining what is wrong with the current federal determination of the SCC used as the excuse for more carbon dioxide restrictions. There is so much wrong with the feds’ SCC, that we concluded that rather than just update it, the OMB ought to just chuck the whole concept of the social cost of carbon out the window and quickly close and lock it.
We have discussed many of the problems with the SCC before, and in our last post we described how the feds have turned the idea of a “social cost” on its head. In this installment, we describe a particularly egregious fault that exists in at least one of the prominent models used by the federal government to determine the SCC: The projections of future sea-level rise (a leading driver of future climate change-related damages) from the model are much higher than even the worst-case mainstream scientific thinking on the matter. This necessarily results in an SCC determination that is higher than the best science could possibly allow.
The text below, describing our finding, is adapted from our most recent set of comments to the OMB.
The Dynamic Integrated Climate-Economy (DICE) model, developed by Yale economist William Nordhaus (2010a), is what is termed an “integrated assessment model” or, IAM. An IAM is computer model which combines economics, climate change and feedbacks between the two to project how future societies are impacted by projected climate change and ultimately to determine the social cost of carbon (i.e., how much future damage, in today’s monetary terms, …
Michael Mann claim about Sandy dismantled: Mann: ‘That 13-foot surge that flooded a large part of Manhattan, at least one of those 13 feet was due to human caused global warming
http://stevengoddard.wordpress.com/2014/03/29/michael-mann-lying-to-the-press-again/…
Watch Now: Bill Nye says costs of cutting CO2 worth it — or else NYC may be underwater: ‘What is the cost of having to move lower Manhattan?’
…Not worried about global warming? The Obama admin. will fix that! New White House initiative tries to sway public on climate threats
Infrastructure threatened by climate change, a national crisis?
Infrastructure threatened by climate change, a national crisis?
http://junkscience.com/2014/03/06/infrastructure-threatened-by-climate-change-a-national-crisis/
Scientific American, from Climatewire, says climate change is creating a national infrastructure crisis. Maybe being “Scientific” they should spend some time examining the claims. Among the worries Scientific American has is the displacement of people in from a 4′ sea level rise. The current estimates of SLR are less than 3 mm/year. That comes to […]…