This lecture, given by Andrew Dickson (Scripps Institution of Oceanography, USA) covers a variety of topics related to the questions:
- What is meant by the term “measurement uncertainty”? How is this different from the more traditional terms: “accuracy” and “precision”?
- What is “the seawater CO2 system”? What measurements are required to provide a complete description of it?
- How do uncertainties in the measured values, of both the seawater sample and of any additional “constants”, used to describe the seawater CO2 system propagate into resulting uncertainties in any derived values (e.g. aragonite saturation state)?
- How should one decide on appropriate targets for measurement uncertainties when looking to describe the seawater CO2 system? (I shall briefly summarize the Global Ocean Acidification Observing Network (GOA-ON) approach of defining differing uncertainty goals: “climate” and “weather”, for differing scientific purposes.)
- Having decided on a target uncertainty, how can one estimate the uncertainty for a particular measurement system?
- Having done so, how does one ensure that such an uncertainty is being achieved routinely?
In addition a variety of useful background documents are provided to build upon this necessarily brief introduction.