Difference between revisions of "Category:Speleothem Working Group"
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If challenges specific to dating speleothems exist, please list relevant metadata properties below. | If challenges specific to dating speleothems exist, please list relevant metadata properties below. | ||
+ | * For age models based in lamina counting, evidence that laminae are annual | ||
+ | * For age models using C14 for deposition rate, evidence on robustness of assumed linearity | ||
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+ | === Sample data === | ||
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+ | * Distance from top of speleothem | ||
+ | * Thickness of analysed sample | ||
+ | * Evidence of equilibrium (Hendy tests) | ||
+ | * Year (with uncertainty) | ||
==References== | ==References== | ||
<references \> | <references \> |
Revision as of 18:10, 31 March 2017
Contents
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 speleothems, and aims to formulate a set of recommendations for such a standard.
Membership
Members of 'Speleothem Working Group'
This working group has 4 members.
Specific tasks
We recommend that discussions focus on the following techniques, 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 optional 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?)
- provide an ideal data table (or link to one) for each type of observation, so the community knows what to report and how to report it.
- provide separate recommendations for new and legacy datasets
Things to describe
Observations
- stable isotopes
- trace metals
- organics
- fluid inclusions
- mineralogy
- clumped isotopes
- noble gas temperatures
- C14
- Optical Density of luminosity (ODL)
- Mg/Ca
Hydrology
The interpretation of geochemical or lithological signals embedded in speleothem archives relies sometimes heavily on implicit assumptions about cave hydrology. What parameters need to be archived to enable long-term re-use and better information extraction from speleothem datasets? A few come to mind:
- karst residence time
- transit time distributions
- porosity
- soil thickness
Chronology
Please see the chronologies WG for generalities about U/Th dating or layer-counting. If challenges specific to dating speleothems exist, please list relevant metadata properties below.
- For age models based in lamina counting, evidence that laminae are annual
- For age models using C14 for deposition rate, evidence on robustness of assumed linearity
Sample data
- Distance from top of speleothem
- Thickness of analysed sample
- Evidence of equilibrium (Hendy tests)
- Year (with uncertainty)
References
This category currently contains no pages or media.