Archives de catégorie : climate-debate

Climate scientist admits embarrassment over future climate uncertainty

by J. Cartwright, March 16, 2018 in A. Watts WUWT

WUWT readers may recall this chart which clearly illustrates just how uncertain climate science really is.

t seems that some climate academics are a bit embarrassed that they haven’t been able to pin down climate sensitivity. From EU Horizon Magazine

Climate sensitivity – reducing the uncertainty of uncertainty

by Jon Cartwright

A study published in January 2018 claims to halve the uncertainty around how much our planet’s temperature will change in response to rising carbon dioxide (CO2) levels, potentially giving governments more confidence to prepare for the future.

The Climate Dictionary

by Willis Eschenbach, March 16, 2018 in WUWT

Finally, we have the IPCC Likelihood Scale:

Virtually certain – “All my cool scientist friends agree”.

Very likely – “We really hope this is true”.

Likely – “Two climate models out of three agree”.

About as likely as not – “Nobody has a clue”.

Unlikely – “This outcome offends us”.

Very unlikely – “We really don’t want you going down that path”.

Exceptionally unlikely – “Stephen McIntyre said it first so it can’t possibly be true.”

New paper tries to disentangle global warming from natural ocean variations

by A. Watts, March 15, 2018 in WUWT

This paper deals with the central argument that skeptics bring up about claims of global warming: How do you separate the temperature signal from the base components like natural variation, human land-use influence, micro-site bias, measurement errors and biases, and other factors to get the “true” global warming signal?

The answer is that you can’t, at least not easily.

With the surface temperature record, it’s somewhat easier since  you can observe some of those elements directly and separate them (such as we’ve done in our surfacestations project for land-use microsite biases), but in the ocean, everything is homogenized by the ocean itself. All you can look for is patterns, and try to disentangle based on pattern recognition. That’s what they are trying to do here.

Disentangling Global Warming, Multidecadal Variability, and El Niño in Pacific Temperatures
Robert C. Wills, Tapio Schneider, John M. Wallace, David S. Battisti, Dennis L. Hartmann



NOAA Tamper With NY Temperatures Again

by P. Homewood, March 15, 2015 in NotaLotofPeopleKnowThat

According to the heavily adjusted NOAA data, last month was the fifth warmest February on record in the Central Lakes Division of NY State, with an average mean temperature of 31.4F.

Prior to 1981, the warmest was February 1954, which averaged 29.8F. In other words, NOAA claim that February 1954 was 1.6F colder than last month.

Which all looks very suspicious, because the opposite picture is shown at the high quality station of Ithaca Cornell University (…)

1988 Congressional climate change hearing: claims of accelerating sea level rise – failed

by Larry Hamlin, March 14, 2018 in WUWT

In June 23, 1988 the Senate Committee on Energy and Natural Resources held a hearing addressing the Greenhouse Effect and Global Climate Change.

Among the presenters at this hearing was Dr. James Hansen, Director, NASA Goddard Institute for Space Studies who introduced his infamous and now debunked global surface temperature model results with future temperature projections under three different scenarios of CO2 emissions growth that grossly over exaggerated resulting projected global temperature increases.

An “Exceptionally large amount of winter snow in Northern Hemisphere this year

by A. Watts, March 14, 2018 in WUWT

From the Snowfalls are now just a thing of the past department and the Finnish Meteorological Institute comes this press release today.

Exceptionally large amount of winter snow in Northern Hemisphere this year

The new Arctic Now product developed by the Finnish Meteorological Institute shows with one picture the extent of the area in the Northern Hemisphere currently covered by ice and snow. This kind of information, which shows the accurate state of the Arctic, becomes increasingly important due to climate change. The Arctic region will be discussed at the Arctic Meteorological Week which begins in Levi next week.

Ice-Free Arctic Fantasies Melting Away As Temperatures Plummet…Sea Ice Mass Grows Impressively

by P. Gosselin, March 14, 2018 in NoTricksZone

German skeptic and weather expert ‘Schneefan’ here writes how climate activist Mark C. Serreze recently announced this year’s sea ice extent was at the smallest all-time area. But since then Arctic temperatures have plummeted and sea ice area has grown to over 14 million square kilometers (…)

Do-It-Yourself: The solar variability effect on climate.

by Javier, March 13, 2018 in WUWT

So, you still don’t believe small changes in solar activity can significantly affect climate? You know a very cold period during the Little Ice Age coincided with the Maunder Minimum, but you have heard that the Little Ice Age could have had other causes, like volcanoes. You have been told repeatedly that since 1980 solar activity has been decreasing while global temperature has been increasing, so it can’t be the Sun.

Not so fast. There is a vested interest in climate change not being due to the Sun, as the Sun can’t be taxed or prevented from doing what it does. A further problem is that solar physicists have no clue about how the Sun can show centennial or millennial periodicities. As they prefer to talk about what they know, they reject such periodicities, even though we have evidence in cosmogenic records (14C in tree rings and 10Be in ice cores).

And if I tell you that little changes in the Sun have a disproportionate effect on climate you won’t believe me. You shouldn’t believe me. You shouldn’t believe anybody. Science is not about believing. Religion is about believing. So, I propose that you prove to yourself what effect little changes in the Sun have on climate.

New Research Finds Polar Bear Numbers Up 42% Since 2004 – Survival Rates Unaffected By Sea Ice Availability

by K.  Richard,  March 12, 2018 in NoTricksZone

 (…) “A recent aerial survey of the Southern Hudson Bay subpopulation concluded that the abundance of polar bears has remained steady since 1986 (943 bears; SE: 174) (Obbard et al., 2015). The survey included the entire coastal range and offshore island habitat of the Southern Hudson Bay subpopulation, except for the eastern James Bay coast. Taken together, the results of the aerial survey and the participant responses from Wemindji and Chisasibi indicate that the local population has remained stable. However, the unanimous responses from participants in Whapmagoostui/Kuujjuarapik suggest that there has been a localized increase in the number of bears near Whapmagoostui/Kuujjuarapik.”

Scientific American Turns Down The Heat Over Global Warming

by Dr. B. Peiser, March 12, 2018 in ClimateChangeDispatch

Greens fear that optimism will foster complacency and hence undermine activism. But I find the essays of Pinker and Boisvert inspiring, not enervating.

I plan to assign the essays to my students, who have become quite gloomy lately. These days, despair is a bigger problem than optimism. —John Horgan, Scientific American, 8 March 2018

Climate Science’s Dark Knight, Marc Morano, Body Slams Climate Agenda In New Bestseller

by P Gosselin, March 6, 2018 in NoTricksZone

I couldn’t possibly recommend the following new book enough: The Politically Incorrect Guide to Climate Change.

It is authored by the person whom leading German center-left “intellectual” weekly Die Zeit once portrayed (black vs white) as the Godfather of the global warming denial and doubt syndicate: Marc Morano of CFACT’s Climate Depot.

The Modern Warm Period Delimited

by David Archibald, March 10, 2018 on WUWT

This recent post discussed the end of the Modern Warm Period and the year that global cooling began. That post was inspired by a comment to a post on WUWT six to eight years ago to the effect that climate is controlled by the Sun’s magnetic flux – no need to worry about much else. The comment seemed to come from a warmer scientist – they are well funded, have plenty of time on their hands, some are smart and idle curiosity would get a few looking into what controls climate. The results would not be published of course. To paraphrase Mussolini, everything within the narrative, nothing outside the narrative, nothing against the narrative. If the Sun’s magnetic flux controls climate, you don’t have to worry about what goes on under the hood – the effect of EUV on the NAO, the GCR flux, the F10.7 flux, any other flux apart from the magnetic flux (…)


by Jo Moreau, 9 mars 2018, in Belgotopia

Complémentairement à l’article de Donna Laframboise, il semblerait que les différents groupes de travail du GIEC n’aient pas la même définition d’un conflit d’intérêt. On peut identifier deux formes principales de conflit d’intérêt : soit l’utilisation d’une étude rédigée par un auteur ou coauteur du GIEC, ce qui revient à publier des études qu’on utilisera ensuite dans une auto-justification, (voir aussi à ce sujet un billet précédent : ), soit la présence en ses rangs d’un salarié de l’industrie ou d’un membre ou d’un proche d’une ONG militant dans le domaine idéologico-politique.

On se rappelle que des contributeurs du GIEC, salariés de l’industrie chimique, avaient été accusés par diverses sources de conflit d’intérêt en 2016, que dire alors de membres ou proches d’ONG militantes, qui semblent de plus en plus se substituer aux organes démocratiques dans la direction de nos sociétés…