Mistillid til FNs klimapanel

Diverse, IPCC, Klima, Videnskab, miljø — Drokles on September 23, 2013 at 5:35 am

FN udkommer snart med sin 5. rapport (AR5) om verdens klima. Klimapanelets rapporter definerer klimavidenskabens konsensus og er blevet kaldt ‘guldstandarden’ indenfor klimavidenskaben. Følgeligt er definitionsretten også diktionsmagten, da ingen sand videnskabsmand kan gå op imod en guldstandard af et flertal af kollegaers opfattelse. Klimapanelets troværdighed bygger altså på denne cirkelslutning, hvor retten er hvad de mange siger og man har ret fordi man er mange. Et flertal kan ikke tage fejl thi da er konsensus ikke autoritet. Og man kan derfor ikke ændre sin oprindelige position skulle virkeligheden begynde at løbe fra den uden da at indrømme at et flertal kan tage fejl og således at opgive konsensus’ autoritet. Alt man kan er at skærpe, præcisere, perspektivere og detaljere på den oprindelige tese. Judith Curry skriver om det

The IPCC was seriously tarnished by the unauthorized release of emails from the University of East Anglia in November 2009, known as Climategate.  These emails revealed the ‘sausage making’ involved in the IPCC’s consensus building process, including denial of data access to individuals who wanted to audit their data processing and scientific results, interference in the peer review process to minimize the influence of skeptical criticisms, and manipulation of the media.  Climategate was quickly followed by the identification of an egregious error involving the melting of Himalayan glaciers.  These revelations were made much worse by the actual response of the IPCC to these issues. Then came the concerns about the behavior of the IPCC’s Director, Rachendra Pachauri, and investigations of the infiltration of green advocacy groups into the IPCC. All of this was occurring against a background of explicit advocacy and activism by IPCC leaders related to CO2 mitigation policies.

The IPCC does not seem to understand the cumulative impact of these events on the loss of trust in climate scientists and the IPCC process itself. The IPCC’s consensus building process relies heavily on expert judgment; if the public and the policy makers no longer trust these particular experts, then we can expect a very different dynamic to be in play with regards to the reception of the AR5 relative to the AR4.

But there is another more vexing dilemma facing the IPCC.  Since publication of the AR4, nature has thrown the IPCC a ‘curveball’ — there has been no significant increase in global average surface temperature for the past 15+ years.

Based upon early drafts of the AR5, the IPCC seemed prepared to dismiss the pause in warming as irrelevant ‘noise’ associated with natural variability. Under pressure, the IPCC now acknowledges the pause and admits that climate models failed to predict it. The IPCC has failed to convincingly explain the pause in terms of external radiative forcing from greenhouse gases, aerosols, solar or volcanic forcing; this leaves natural internal variability as the predominant candidate to explain the pause.  If the IPCC attributes to the pause to natural internal variability, then this begs the question as to what extent the warming between 1975 and 2000 can also be explained by natural internal variability.  Not to mention raising questions about the confidence that we should place in the IPCC’s projections of future climate change.

Nevertheless, the IPCC appears to be set to conclude that warming in the near future will resume in accord with climate model predictions.

Virkeligheden er ved at løbe fra klimapanelet og tilliden til dets autoritet falder. The Telegraph fortæller om absurde diskussioner om damage control

Several governments who fund the body have since complained about how the issue is tackled in the report.

Germany called for the reference to the slowdown to be deleted, saying a time span of 10-15 years was misleading in the context of climate change, which is measured over decades and centuries.

The US also urged the authors to include the “leading hypothesis” that the reduction in warming is linked to more heat being transferred to the deep ocean.

Belgium objected to using 1998 as a starting year for any statistics. That year was exceptionally warm, so any graph showing global temperatures starting with 1998 looks flat, because most years since have been cooler.

While Hungary worried the report would provide ammunition for sceptics.

Til det siger Dr Lubos Motl tørt

Quite generally, one could say that the American delegation prefers to publish the facts and supplement it with a (bogus) explanation while the European climate alarmists prefer downright censorship. This opinion is also supported by the comment in The Boston Globe that the U.S.-based Union of Concerned Scientists And Anthony Watts’ Dogs is worried that people will be saying “look, the IPCC is silent about the lull” which would be even worse than for “the cause” than a confession that there’s been no warming for nearly two decades.

There just isn’t any competitive hypothesis about the lack of warming that would be compatible with the meme about a dangerously high (and all natural factors beating) warming trend caused by the anthropogenic man-made emissions. Everyone knows that no such explanation that one wouldn’t be ashamed of exists in the scientific literature which is why no one will recommend you any paper of this type. There just isn’t one. The leading interpretation of the absence of the warming is that the global warming hypothesis with the numbers that were dominant among the “concerned institutions” in the recent decade has been falsified by the observations. Too bad that politicians are trying to play painful and childish games to misinterpret the results of the scientific research, research that they claim to be listening to but research that they actually want to control so that it suits their political needs.

Som klimapanelets formand Rajendra Pachauri sagde ganske åbent i et interview med Times of IndiaLet’s face it, we are an intergovernmental body and our strength and acceptability of what we produce is largely because we are owned by governments.

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