Category:Marine Sediment Working Group
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 marine sedimentary archives (see this page for a definition of Marine Sediment Archive), and aims to formulate a set of recommendations for such a standard.
Members
The group currently has one coordinator, Julie Richey (USGS)
Members of 'Marine Sediment Working Group'
This working group has 16 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 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?)
- 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. Mg/Ca 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.
Marine sediments are a very ubiquitous archive on which many types of observations are made, and involving thousands of people around the world. It seems wise for this WG to rally around sub-groups start dedicated to data standards about the following sensors/observation types:
Geochemical Data
Foraminiferal Geochemistry
Stable isotopes
Trace Metals
Mg/Ca
In the following table, enter the metadata that you'd wish every member of the Mg/Ca community would enter to make their data reproducible. To add more lines, follow this guide. For a definition of Essential (E)/ Recommended (R)/ Desired (D), see this page.
| Metadata | Essential (E)/ Recommended (R) / Desired (D) | Reason | Added by (optional) |
|---|---|---|---|
| Category: Location_© (Lat, Lon, and DEPTH) | E | Depth can be useful to get an idea of dissolution in the core | Deborah Khider (talk) 12:37, 17 February 2017 (PST) |
| Property:SensorGenus_© Property:SensorSpecies_© | E | Species information needed to infer which section of the water column is being recorded | Deborah Khider (talk) 12:37, 17 February 2017 (PST) |
| Cleaning Methodology | R | Useful to correct for offsets, especially for compilation work although a quick plot can often help figure out the cleaning methodology | Deborah Khider (talk) 12:37, 17 February 2017 (PST) |
| Sample Depth | E | Positional information needed to relate the samples back to the archive | Deborah Khider (talk) 12:37, 17 February 2017 (PST) |
| ChonDataTable | E for new datasets/ R for legacy datasets | The raw radiocarbon, tie points, 210Pb measurements should be made available so that age models can be updated in light of new calibration curves or new age modeling techniques | Deborah Khider (talk) 12:37, 17 February 2017 (PST) |
| Number of specimens utilized per sample | R | The number of foraminiferal tests used per sample can be used to understand the sampling uncertainity associated with the measurements based on the signal-to-noise ratio of the climate signal at the location (planktic foraminifera live for 2-4 weeks) | Kau (talk) 13:17, 7 March 2017 (PST) |
To gather rapid feedback on whether the proposed metadata should be essential, recommended or optional, answer the polls below:
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Organic Geochemistry
Alkenones
GDGTs
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Compound specific isotopes
Physical Data
Grain Size
Micropaleontological Data
- Report raw counts if available. And if not, at least
- Minimum number of specimens counted
- Size fraction
If the data were used to infer temperature or sea ice concentration, then the method (MAT, WA-PLS, etc) and the training set should be mentioned/required metadata.
Polls
Here are three example polls that the group might want to consider:
For NEW DATASETS:
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For LEGACY DATASETS:
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This is an example poll. To vote on what should be considered Legacy, see this page.
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Pages in category "Marine Sediment Working Group"
This category contains only the following page.
