Category:Ice Cores Working Group
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[hide]Overview
In the Linked Earth context, a working group (WG) is a self-organized coalition of knowledgeable experts, whose activities are governed herewith. This page is dedicated to the discussion of data and metadata standards for proxies based on glacier ice (see this page for a definition of the glacier ice archive), and aims to formulate a set of recommendations for such a standard.
Members of 'Ice Cores Working Group'
This working group has 4 members.
Specific tasks
We recommend that discussions focus on the following considerations, and explore potential commonalities.
For each observation type, we recommend:
- structuring discussions around what scientific questions one would want to ask of the data
- listing essential, recommended, and desired information for:
- the measurements themselves
- any inference made from the measurements (e.g. calibration to temperature)
- the underlying uncertainties, and what those numbers correspond to (e.g. 1-sigma or 2-sigma?)
- providing an ideal data table, so the community knows what to report and how to report it.
- providing separate recommendations for new and legacy datasets, and for how to label measured and inferred variable (e.g. δD is measured, temperature is inferred)
- thinking about how the rest of the paleoscience community, or other (non)scientists may make use of the data you describe.
Ice core projects are inherently collaborative in nature, and have thus developed mechanisms for data exchange, including some form of standards. We do not ask this WG to re-invent the wheel; if these standards are defined somewhere, please copy/paste freely here.
List of metadata
Preliminary Standards contributed by User:NatalieKehrwald can be found here: File:NatalieKehrwald IceCoreWG StandardDraft 042417.xlsx. Please add to this list.
You can sign your comments by using:~~~~
Metadata | Essential (E), Recommended (R), or Desired (D) | Comment |
---|---|---|
Age scale and dating points | E | |
Possible melt in transport | E | |
Depth of any melt layers | E | |
Depth of any ash layers | E | |
All proxy observations determined in the core (e.g. stable isotopes, dust…) | E | See the sections below to discuss standards applying to specific proxies. |
Geographical coordinates | E | |
Continuous vs discrete sampling | E | |
Coring techniques | R | In the LinkedEarth Ontology, the physical sample category allows to enter a Property:Method (L) for the coring technique. Deborah Khider (talk) 12:24, 25 April 2017 (PDT) |
Interpretation of proxies in paper | R | The LinkedEarth Ontology has an interpretation category that can be re-used. Deborah Khider (talk) 12:24, 25 April 2017 (PDT) |
Core cutting techniques | R | |
Core storage conditions | R | |
Bedrock reached (yes or no) | R | |
Borehole temperatures | R | |
Depth and composition of any organic material | R | |
Any snowpit information from the same location (if available) | D | |
Core densities | D | |
Depths of brittle ice (if applicable) | D | |
Depth of firn/ice transition (if applicable) | D | |
Presence of elongated bubbles (if applicable) | D |
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Specific proxy observations
Ice-phase measurements
Stable Water Isotopes
Major Ions
Borehole thermometry
Gas-phase measurements
Noble Gases
Greenhouse gases
Dust
Timescale construction
Discussion regarding timescales can also be found in the chronolgy working group page.
Is there a unified way to report on timescale construction? Should there be? What does a user need to know about the timescale was constructed to make the best use of the data?
Uncertainties
See the uncertainties working group for a discussion on how to report uncertainties in general.
Discuss ice core-specific problems below:
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