Archives de catégorie : climate-debate

Nature Unbound V – The elusive 1500-year Holocene cycle

by Javier,  September 15, 2017, in Judith Curry Climate Etc.

The existence of a 1500-year climatic cycle during the Holocene, related to the glacial Dansgaard-Oeschger cycle, is a matter of intense debate. However, by introducing precise timing requirements it can be shown that the 1500-year cycle displayed in Northern Hemisphere glacial records is also observed in Holocene records from all over the world.

The cycle is most prominently displayed in oceanic subsurface water temperatures, Arctic atmospheric circulation, wind deposits, Arctic drift ice, and storminess records.

Now available on Amazon: ‘Climate Change: The Facts 2017’

by John Abbot et al., September 2017, in A. Watts, WUWT

Climate Change: The Facts 2017 contains 22 essays by internationally-renowned experts and commentators, including Dr Bjorn Lomborg, Dr Matt Ridley, Professor Peter Ridd, Dr Willie Soon, Dr Ian Plimer, Dr Roy Spencer, and literary giant Clive James. Anthony Watts also has a chapter.

The volume is edited by Dr Jennifer Marohasy, Senior Fellow at the Institute of Public Affairs. Fourteen of the contributors currently hold or have held positions at a university or a scientific research organisation.

Smaller Trends and No Acceleration of Mediterranean Sea Levels

by S. Zerbini et al., 2017 in Earth-Science Reviews

Zerbini et al. also investigated/tested for the existence of an acceleration of sea level rise in each of the six Mediterranean station’s data, reporting that “our analysis indicates that it is not possible to reliably state the existence of any acceleration, in the area of this study, considering the past 140 years or so, from 1870 through 2012.”

The Little Boy, El Nino and Natural Climate Change

by Anastasios Tsonis, September 15, 2017 in GWPF Report26 (.pdf)

This report describes this phenomenon and brings it into a modern global con- text. But the story is more than simply one of some old South American geophysical phenomenology seen from a global perspective; it is tied to an extraordinary story about new scienti c thinking, arising at the end of the 20th century, concerning the nature of change itself.

SEA LEVEL: Rise and Fall – Part 1

by Kip Hansen, September 13, 2017 in WUWT

I have written about sea level rise here:  here, here, here, here and here.  The previous essays are not prerequisites but are interesting specific examples.

There are two important points which readers must be aware of from the first mention of SLR:

  1. SLR is a real imminent threat to coastal cities and low-lying coastal and near-coastal densely-populated areas.

  2. SLR is not a threat to anything else — not now, not in a hundred years — probably not in a thousand years — maybe, not ever.

Carbon dioxide emission-intensity in climate projections: Comparing the observational record to socio-economic scenarios

by F. Pretis and M. Roser, June 2017, Energy, Elsevier


The wide range of socio-economic scenarios in climate projections results in high uncertainty about climate change.

We compare socio-economic scenario projections to observations over 1990–2010.

Global CO2 emission intensity increased despite all major scenarios projecting a decline.

Under-projection of emission intensity raises concerns about achieving emission targets.


Histoire longue des cyclones aux Antilles

by Benoît Rittaud, 13 septembre 2017

Le cyclone Irma qui a dévasté Saint-Martin et Saint-Barthélémy dans les Antilles françaises a servi de prétexte à de nombreux commentateurs et journalistes pour en remettre une couche sur les “dérèglements climatiques d’origine humaine”. Comme d’habitude, les vagues éléments de prudence rappelant qu’on ne peut tirer de conclusions d’un élément isolé ont vite été noyés par les “appels à l’action” et l’invocation de l’Accord de Paris de 2015.

Or s’agissant du climat aux Antilles l’année 2015 a été importante pour une toute autre raison que la signature de l’Accord de Paris : c’est l’année de publication d’un article de recherche tout à fait passionnant sur les ouragans dans cette région du monde.

Open letter to UN Secretary-General: Current scientific knowledge does not substantiate Ban Ki-Moon assertions on weather and climate, say 125-plus scientists

by Habibullo I. Abdussamatov  +125/et al., November 29, 2012, in Washington Post

On November 13, 2012, you said at Yale: “The science is clear; we should waste no more time on that debate.”

We the undersigned, qualified in climate-related matters, wish to state that current scientific knowledge does not substantiate your assertions.

Past Sea Levels Rose 4-6 Meters Per Century, Shorelines Retreated 40 Meters Per Year…Without CO2 Flux

by Kenneth Richard, September 7, 2017 in NoTricksZone

This modern rate  –  just 0.17-0.18 of a meter per century has remained relatively unchanged from the overall 20th century average, and there has been no statistically significant acceleration in the sea level rise rate (just 0.0042 mm/yr-²) since 1900.

The evolution of Hurricane Irma’s disinformation campaign

by Paul Homewood, September 7, 2017 in ClimateChangeDispatch


In other words, there have now been four hurricanes as strong or stronger since 1980, about one every decade, and certainly nothing like the “unprecedented” impression left by the headlines.

And as we know, prior to Allen in 1980, we had very little in the way of measurements in mid-ocean.

A closer look at the Labor Day Hurricane of 1935, widely acknowledged to be by far the most powerful storm to hit the US, emphasizes this fact.