Hans von Storch GKSS, Helmholtz Association HGF KlimaCampus, Hamburg Status: Climate science, IPCC, postnormality and the crisis of trust 3. March 2010,

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Hans von Storch GKSS, Helmholtz Association HGF KlimaCampus, Hamburg Status: Climate science, IPCC, postnormality and the crisis of trust 3. March 2010, Brussels, EPP group

Overview Robust Results Methodical problems The IPCC Postnormality Crisis of trust

Global temperature derived from thermometer data (CRU)

IPCC 2007 Auch mensch- gemachte Treibhausgase Nur natürliche Faktoren Messungen Explaining global mean surface air temperature

Scenarios, not predictions

Causes of inhomogenities: Changes in –Instruments –Sampling frequencies –Measuring units –Environments (e.g. trees, buildings) –Location Representativity of near surface wind speed measurements 1.25 m/s

Representativity of near surface wind speed measurements

Mission: determine present status of scientific knowledge, and its consensus – not: discover “truth” about climate change Intergovernmental Panel on Climate Change

The IPCC… Reports contain errors. This is not a surprise given the sheer volume of the reports. Examples: Himalaya, Low lying part of The Netherlands, endangered food supply in Africa. All WG 2 (impacts), all exaggerations – by coincidence? Often related to employing material provided by interested parties IPCC has not adopted mechanisms for dealing with such problems. But, maybe “just” sloppiness… And: No known errors in WG 1(physics)

Analyses of long-term records of disaster losses indicate that societal change and economic development are the principal factors responsible for the documented increasing losses to date. Because of issues related to data quality, the stochastic nature of extreme event impacts, length of time series, and various societal factors present in the disaster loss record, it is still not possible to determine the portion of the increase in damages that might be attributed to climate change due to GHG emissions In the near future the quantitative link (attribution) of trends in storm and flood losses to climate changes related to GHG emissions is unlikely to be answered unequivocally. The hurricane/damage story The Hohenkammer consensus Co-sponsors: US NSF, Munich Re, GKSS Institute for Coastal Research, Tyndall Centre for Climate Change Research 32 participants from 16 countries Summary consensus report Consistent with IPCC WGI 2006

IPCC AR4, WG2, 2007, suggests instead:

“Great Miami”, 1926, damage: – in 2005 terms: 139 b$ Katrina, 2005: 81 b$ Pielke, Jr., R.A., Gratz, J., Landsea, C.W., Collins, D., Saunders, M., and Musulin, R., Normalized Hurricane Damages in the United States: Natural Hazards Review Losses from Atlantic Hurricanes

“Great Miami”, 1926, damage: – in 2005 terms: 139 b$ Katrina, 2005: 81 b$ Pielke, Jr., R.A., Gratz, J., Landsea, C.W., Collins, D., Saunders, M., and Musulin, R., Normalized Hurricane Damages in the United States: Natural Hazards Review Losses from Atlantic Hurricanes

“Great Miami”, 1926, damage: – in 2005 terms: 139 b$ Katrina, 2005: 81 b$ Pielke, Jr., R.A., Gratz, J., Landsea, C.W., Collins, D., Saunders, M., and Musulin, R., Normalized Hurricane Damages in the United States: Natural Hazards Review Losses from Atlantic Hurricanes

This time it was not a sloppy error -reviewers pointed to the problem - the authors choose this representation even though the issue was, and still is, scientifically contested. Significant literature was disregarded. - IPCC authors have decided to violate the mission of IPCC, by presenting disinformation. - IPCC secretariat is not giving answers, why issue is not rectified.

Postnormal science Jerry Ravetz, Silvio Funtovicz, 1986 and earlier State of science, when facts uncertain, values in dispute, stakes high and decisions urgent. Climate science is postnormal, see Bray and von Storch, 1998 In this state, science is not done for reasons for curiosity but is asked for as support for preconceived value-based agendas. Compares with various environmental cases, such as nuclear power, BSE etc.

Lund and Stockholm Two different construction of „climate change“ – scientific and cultural – which is more powerful? Cultural: „Klimakatastrophe“ Scientific: man-made change is real, can be mitigated to some extent but not completely avoided Storms

The science-.policy/public interaction is not an issue of „knowledge speaks to power“. The problem is not that the public is stupid or uneducated. Science has failed to respond to legitimate public questions (cf. blog “Klimazwiebel”) and has instead requested. “Trust us, we are scientists”. The problem is that the scientific knowledge is confronted on the „explanation marked“ with other forms of knowledge (pre- scientific, outdated; traditional, morphed by different interests). Scientific knowledge does not necessarily “win” this competition. The social process „science“ is influenced by these other knowledge forms. Science can not be objective but should nevertheless strive to be so. Knowledge market

The IPCC - is needed as an impartial institution to provide relevant knowledge for decision makers. - has documented strong consensual evidence that the human emissions of greenhouse gases (GHG) in the past, and foreseeable future has, and will continue to warm the climate system. - most of this warming can not be explained without the increase in GHG concentrations – with the present knowledge.

The IPCC The crisis of climate science and the IPCC is not about the key scientific construct (man-made greenhouse gas emissions change climate towards warmer conditions) but a crisis of the trust into the trust of the societal institution “climate science”. Climate science has been unprepared with the challenges of post- normality, in particular to deal with the ongoing politicization of its utility and actors. Science needs measures to fend of the influence of interested parties (mainly green political and economic interests).

IPCC procedures need revisions 1.Dominant (“best”) authors are no longer responsible for describing consensus (as “lead authors”) – (otherwise they asses the own work). 2.Political and economic interests are not informing the process of assessing the legitimate scientific knowledge. 3.An independent “ombudsman”-system takes care of complaints about factual errors (in determining consensus and conflicts of interest). – possibly fulfilled. 4.Assessment by IPCC is independent of acting persons. Dominant authors must be frequently replaced. 5.IPCC is providing an assessment of the contested issues. In particular it describes dis-sensus. IPCC encourages falsification. 6.Political and scientific functions within IPCC must be strictly separated.

1. Which are the latest scientific findings (since the IPCC Fourth Assessment Report)? Many, and which of these are robust and consensual, we should leave to the IPCC AR5 2. Which internal need for action do you identify for the European Union? Which measures would you suggest with regard to further action inside the EU? Parliament needs to base its decisions openly of value preferences, while considering scientific knowledge about the implications of such decisions. Parliament must not act as if science would leave no room for decisions. 3. Which global need for action do you see? What are the concrete calls for action to the European Parliament, also against the background of a future stronger involvement of the EP in international negotiations and in preparation of COP16? Consider both, reductions of emissions and other human influences on climate as well as reduction of vulnerability to climatic states (adaptation); avoid unrealistic goals. Ensuring a strict application of rules of conduct within the IPCC – no participation of interest groups in assessing the state of science. 4. If you should find out one day that you have been mistaken and that your statements as regards climate change have been wrong, what happens then? Then science is making progress; some of our results will certainly be mistaken; errors are unavoidable, and policies using scientific knowledge should acknowledge this basic fact.

Competition of knowledge claims mitigation, adaptation costs policies

Competition of knowledge claims