HS1.5/GI1.9 Data & Models, Induction & Prediction, Information & Uncertainty: Towards a common framework for model building and predictions in the Geosciences (coorganized) 
Convener: Uwe Ehret  CoConveners: Bodo Ahrens , Erwin Zehe , Hoshin Gupta , Rohini Kumar , Steven Weijs 
PICOs
/ Mon, 28 Apr, 13:30–17:00
/ PICO Spot 1

These goals unite the Geosciences. What separates them are the multitude of data, approaches for building and testing of models (structure diagnosis, parameter optimization and validation), metrics and scores used, and (last but not least) ways to estimate and handle uncertainty. This separation obstructs communication within and across disciplines. While specific disciplines will always require specific approaches, progress towards a commonly applicable framework for generalization (model building) and application (prediction) can be achieved by addressing the following questions:
• How to evaluate the usefulness of data and models for a given task (their information content) in a generalized way?
• How to evaluate the appropriateness (generality, parsimony) of models given the data and the purpose?
• How to evaluate the interplay of data, model structure and predictive uncertainty, i.e. the flow of information from data through models to decisionmakers?
• How to learn from the encounter of models and data; i.e. how to detect, diagnose and correct model structural errors?
Information theory, dating from at least Shannon (1948) offers a rigorous and universal framework in which information in data and models as well as uncertainty can be addressed. Closely related to Bayesian theory (Jaynes, 2003) it has the potential to serve as a suitable starting point.
In this session, which is a continuation and extension of the former session 'HS1.2  Metrics, measures and objective functions in Hydrology', we welcome both theoretical and applied contributions addressing the above questions.
Shannon, C. E. (1948): A mathematical theory of communication. Bell System Technical Journal, 27(3), 379423.
Jaynes, E. T. (2003). Probability theory: the logic of science. Cambridge University Press,
Cambridge, UK.