Search Results for: verification validation

Sea level rise: what’s the worst case?

by Judith Curry Draft of article to be submitted for journal publication.

Climate modelers open up their black boxes to scrutiny

by Judith Curry Paul Voosen has written a remarkable article in Science about climate model tuning.

The art and science of climate model tuning

by Judith Curry We survey the rationale and diversity of approaches for tuning, a fundamental aspect of climate modeling which should be more systematically documented and taken into account in multi-model analysis. – Hourdin et al.

Climate models for lawyers

by Judith Curry I have been asked to write an Expert Report on climate models. ***SEE UPDATE

Global climate models and the laws of physics

by Dan Hughes We frequently see the simple statement, “The Laws of Physics”, invoked as the canonical summary of the status of the theoretical basis of GCMs.

Expert judgement and uncertainty quantification for climate change

by Judith Curry When it comes to climate change, the procedure by which experts assess the accuracy of models projecting potentially ruinous outcomes for the planet and society is surprisingly informal. – Michael Oppenheimer

Assessing atmospheric temperature data sets for climate studies

By Judith Curry It is therefore suggested to use either the more robust tropospheric temperature or ocean surface temperature in studies of climate sensitivity. – Cederlof, Bengtsson, Hodges

UK-US Workshop Part IV: Limits of climate models for adaptation decision making

by Judith Curry This post discusses Workshop presentations on the utility of climate models for regional adaptation decisions.

What scientific ideas are ready for retirement?

by Judith Curry So, what scientific idea do YOU think is ready for retirement?

Verification, validation, and uncertainty quantification in scientific computing

by Judith Curry I think I am gaining some insight into the debate between scientists versus engineers regarding climate model verification and validation.

Assessing climate model software quality

by Anonymous [O]ur notion of software quality with respect to climate models is theoretically and conceptually vague. It is not clear to us what differentiates high from low quality software; nor is it clear which aspects of the models or … Continue reading

What can we learn from climate models? Part II

by Judith Curry In my original essay on this topic October 2010, my short answer to this question was “I’m not sure.”   My current thinking on this topic reframes the question in the context of fitness for purpose of climate … Continue reading

Academic versus professional perspectives

by Judith Curry In pondering the challenges of climate change (both science and policy), it seems that academics have different perspectives from many other people, with a discriminator being professional decision making experience.

National Strategy for Advancing Climate Models

by Judith Curry Overall, climate modeling has made enormous progress in the past several decades, but meeting the information needs of users will require further advances in the coming decades. – NRC

Climate model verification and validation: Part II

I’m starting a new thread for this topic, since interest in the previous thread has re-generated owing to this AGU abstract by Steve Easterbrook, entitled Do Over or Make Do?  Climate Models as a Software Development Challenge.

Climate model verification and validation

by Judith Curry On the thread building confidence in climate models , a small amount of text was devoted to verification and validation (V&V).  In raising the level of the game, I included the following bullet: • Fully documented verification … Continue reading


by Judith Curry The new International Journal of Uncertainty Quantification has some very interesting papers.  Lets take a look at a paper entitled ‘Error and Uncertainty Quantification and Sensitivity Analysis in Mechanics Computational Models.’

Philosophical reflections on climate model projections

by Judith Curry Should probabilistic qualities be assigned to climate model projections? Are the approaches used by the IPCC for assessing climate model projection quality – confidence building, subjective Bayesian, and likelihood –  appropriate for climate models? What are some … Continue reading

Climate models as ink blots

by Judith Curry From Roger Pielke Jr.:  A fundamental problem with climate science in the public realm, as conventionally practiced by the IPCC, is the essential ink blot nature of its presentation. By “ink blot” I mean that there is … Continue reading

New report on climate change and security

by Judith Curry Mother Jones has an article entitled “CIA’s Weather Underground.”  Its closing sentence: In this political climate, it’s no wonder the CIA declined to discuss its global-warming research for this article. For the time being, the climate spooks … Continue reading

Questions on research integrity and scientific responsibility: Part II

by Judith Curry Here is the content of my presentation to the UN InterAcademy Council Project on Research Integrity and Scientific Responsibility.

Should we assess climate model predictions in light of severe tests?

by Judith Curry This question is posed and addressed in a recent article by Joel Katzav in EOS.

Separating natural and anthropogenically-forced decadal climate variability

by Judith Curry The issue of separating natural from anthropogenically forced variability, particularly in context of the attribution of 20th century climate change, has been a topic of several previous threads at Climate Etc.  The issue of natural vs anthropogenically … Continue reading

NASA Earth Science Advisory Subcommittee

by Judith Curry This week I am attending a meeting of the Earth Science Subcommittee of the NASA Advisory Council.  As described in the Public Notice for the meeting, the topic of this meeting is evaluation of NASA’s  Earth Science … Continue reading

Stephen Schneider and the “Double Ethical Bind” of Climate Change Communication

By Judith Curry On the first anniversary of Steve Schneider’s untimely death, it is worth reflecting on his contributions at the intersection of climate science, policy, politics and media in the public communication of climate change.  Schneider’s views on this … Continue reading