Search Results for: verification and validation

Week in review – science edition

by Judith Curry A few things that caught my eye this past week.

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.

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

Climate models for lawyers

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

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.

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.

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

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.

What scientific ideas are ready for retirement?

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

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

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

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


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.’

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

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.

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

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.

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.

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

Raising the level of the game: Part II

by Judith Curry There has been considerable interesting discussion on the previous thread.  I plan to follow up with thread on verification and validation of climate models, and am pondering how to deal with explaining the greenhouse effect.  On this … Continue reading

Confidence in radiative transfer models

by Judith Curry The calculation of atmospheric radiative fluxes is central to any argument related to the atmospheric greenhouse/Tyndall gas effect.  Atmospheric radiative transfer models rank among the most robust components of climate model, in terms of having a rigorous … Continue reading