|
|
| Line 983: |
Line 983: |
| | | | |
| | ==Road to v2.0== | | ==Road to v2.0== |
| | + | |
| | + | |
| | + | A discussion forum on how to evolve this standard is available through the [http://linked.earth/forums/forum/pacts-v1-0/ LinkedEarth site]. A blog post summarizing priorities is available [http://linked.earth/paleoclimate-data-standards-a-community-pact-and-its-future/ here]. |
Latest revision as of 05:47, 20 June 2019
This page describes the first version of PaCTS (Paleoclimate Community reporTing Standard).
Background
This page describes PaCTS v1.0, which represents the first attempt by the paleoclimate community to standardize the reporting of paleoclimate data. To do so, the community organized itself in working groups centered around the main proxy archives. To see detailed discussions about how the standards evolved, see the current working groups (shortcut on the left).
The recommendation follows a vote on this platform, the LinkedEarth twitter account, and a survey distributed to the community through various platforms (e.g., listservs, PAGES network).
PaCTS v1.0
Each property is either deemed essential (without which the record can't be reused), recommended (necessary to reuse the record optimally), and desired.
In this context a legacy dataset is defined as a dataset that has not been contributed by the original author (see here for details).
Cross Archive Metadata
See the discussion in the cross-archive metadata working group page.
Datasets
Table 1: Recommendation for cross-archive metadata
| Question |
New datasets |
Legacy datasets
|
| contributor |
Essential |
Essential
|
| latitude |
Essential |
Essential
|
| longitude |
Essential |
Essential
|
| altitude |
Essential |
Essential
|
| site name |
Essential |
Essential
|
| dataset version |
Essential |
Recommended
|
| any publication information |
Essential |
Essential
|
| publication authors |
Essential |
Essential
|
| publication year |
Essential |
Essential
|
| publication title |
Essential |
Essential
|
| publication doi |
Essential |
Essential
|
| publication journal |
Essential |
Essential
|
| funding information |
Desired |
Desired
|
| funding principal investigator |
Desired |
Desired
|
| funding agency |
Desired |
Desired
|
| funding country |
Desired |
Desired
|
| funding grant |
Desired |
Desired
|
| any paleodata information |
Essential |
Essential
|
| any chrondata information |
Essential |
Essential
|
| depth/distance/position in the archive |
Essential |
Essential
|
| information about how depth is transformed to age |
Essential |
Recommended
|
| sample thickness |
Essential |
Recommended
|
| original measurements |
Essential |
Essential
|
| units |
Essential |
Essential
|
| analysis date |
Recommended |
Desired
|
| any additional data measured along the primary data of interest |
Recommended |
Recommended
|
| interpretation |
Recommended |
Recommended
|
| calibrated values |
Essential |
Recommended
|
| calibration model |
Essential |
Recommended
|
| calibration reference |
Recommended |
Recommended
|
| physical sample name |
Recommended |
Desired
|
| physical sample IGSN |
Recommended |
Desired
|
| physical sample collection method |
Recommended |
Desired
|
| instrument type |
Essential |
Recommended
|
| laboratory name |
Recommended |
Desired
|
| analytical method |
Essential |
Recommended
|
| method reference |
Recommended |
Desired
|
Compilations
Table 2: Recommendation for compilations
| Question |
New compilations |
Legacy compilations
|
| compilation name |
Essential |
Essential
|
| compilation authors |
Essential |
Essential
|
| funding agency |
Desired |
Desired
|
| funding principal investigator |
Desired |
Desired
|
| funding grant number |
Desired |
Desired
|
| funding country |
Desired |
Desired
|
| model used to compile data |
Essential |
Essential
|
| compilation date |
Essential |
Recommended
|
| compilation version |
Essential |
Recommended
|
| compilation change log |
Essential |
Recommended
|
| publication title |
Essential |
Essential
|
| publication authors |
Essential |
Essential
|
| publication year |
Essential |
Essential
|
| publication journal |
Essential |
Essential
|
| publication doi |
Essential |
Essential
|
| publication from previous work |
Essential |
Recommended
|
| unique identifier to the time series used in the compilation |
Essential |
Recommended
|
Historical Documents
To see the discussion on historical documents, see this page
Recommendation for historical data
| Question |
New datasets |
Legacy datasets
|
| URL to external Pages (scans, pages) |
Recommended |
Recommended
|
| quote ID for later reference |
Essential |
Recommended
|
| reference to quote source |
Essential |
Essential
|
| pages from which the quote is extracted from |
Recommended |
Recommended
|
| language of the quote (or its translation) |
Recommended |
Recommended
|
| quote's protolanguage |
Recommended |
Recommended
|
| quote |
Essential |
Essential
|
| quote's license |
Recommended |
Recommended
|
| quote's doi |
Essential |
Recommended
|
Ice Cores
See the discussion on the ice cores working group page.
Recommendation for ice cores
| Question |
New datasets |
Legacy datasets
|
| possible melt in transport |
Essential |
Essential
|
| depth of any melt layer |
Essential |
Essential
|
| depth of ash layer |
Essential |
NA
|
| all proxy observations determined in the core |
Essential |
Essential
|
| continous vs discrete sampling |
Essential |
Essential
|
| coring techniques |
Essential |
Recommended
|
| core cutting techniques |
Recommended |
Desired
|
| core storage conditions |
Recommended |
Desired
|
| whether the bedrock has been reached |
Recommended |
Desired
|
| borehole temperatures |
Recommended |
Desired
|
| depth and composition of any organic material |
Recommended |
Desired
|
| if available, any snowpit information from the same location |
Recommended |
Desired
|
| core densities |
Essential |
Desired
|
| depth of brittle ice |
Essential |
Desired
|
| depth of firn/ice transition |
Recommended |
Recommended
|
| presence of elongated bubbles |
Recommended |
Recommended
|
Lake Sediments
See the discussion on the lake sediments working group page
Accumulation rate
Recommendation for accumulation rate on lake sediment cores
| Question |
New datasets |
Legacy datasets
|
| accumulation rate |
Essential |
Essential
|
| thickness |
Essential |
Essential
|
| density |
Essential |
Essential
|
| units |
Essential |
Essential
|
| chronological constraints |
Essential |
Essential
|
| accumulation rate type |
Essential |
Essential
|
| method |
Essential |
Essential
|
| pretreatment method |
Recommended |
Recommended
|
| interpretation |
Recommended |
Recommended
|
Compound Specific Isotopes
Recommendation for compound specific isotopes on lake sediment cores
| Question |
New datasets |
Legacy datasets
|
| sample depth |
Essential |
Essential
|
| compound(s) analyzed |
Essential |
Essential
|
| source of compound in sediments |
Essential |
Essential
|
| isotope measured |
Essential |
Essential
|
| interpretation |
Recommended |
Recommended
|
Density
Recommendation for density measurements on lake sediment cores
| Question |
New datasets |
Legacy datasets
|
| density name (e.g., wet bulk density) |
Essential |
Essential
|
| water content/porosity |
Recommended |
Recommended
|
| original measurements |
Essential |
Essential
|
| units |
Essential |
Essential
|
| density type (inferred or measured) |
Essential |
Recommended
|
| method (e.g. direct sampling) |
Essential |
Essential
|
| interpretation |
Recommended |
Recommended
|
Imagery data
Recommendation for imagery data on lake sediment cores
| Question |
New datasets |
Legacy datasets
|
| reflectance or transmittance (by wavelength) |
Essential |
Essential
|
| units |
Essential |
Essential
|
| original measurements |
Essential |
Essential
|
| post acquisition processing methods |
Essential |
Recommended
|
| data reduction methods (peak or trough area method) |
Recommended |
Recommended
|
| pretreatment methods |
Essential |
Recommended
|
| analytical method |
Essential |
Recommended
|
| analytical instrument |
Recommended |
Recommended
|
| interpretation |
Recommended |
Desired
|
Magnetic data
Recommendation for magnetic data on lake sediment cores
| Question |
New datasets |
Legacy datasets
|
| position of the core within the lake basin |
Essential |
Essential
|
| ancillary data about the archive (carbonate and organic content) |
Recommended |
Recommended
|
| flag that the signal recorded hasn't been altered by geochemisty |
Essential |
Recommended
|
Mineralogy
Recommendation for mineralogy on lake sediment cores
| Question |
New datasets |
Legacy datasets
|
| relative abundance (by mineral) |
Essential |
Essential
|
| units |
Essential |
Essential
|
| original measurements |
Essential |
Recommended
|
| mineralogy type |
Recommended |
Recommended
|
| pretreatment method |
Essential |
Recommended
|
| analytical method |
Essential |
Essential
|
| analytical instrument |
Recommended |
Recommended
|
| interpretation |
Recommended |
Recommended
|
Multiple cores
Recommendation for multiple cores
| Question |
New datasets |
Legacy datasets
|
| mid-point depth (core depth) |
Essential |
Recommended
|
| mid-point depth (composite depth) |
Essential |
Essential
|
| thickness |
Essential |
Recommended
|
| information about the relationship between core depth and composite depth |
Essential |
Recommended
|
Particle size
Recommendation for particle size on lake sediment cores
| Question |
New datasets |
Legacy datasets
|
| % volume or mass by grain size class/interval |
Essential |
Essential
|
| units |
Essential |
Essential
|
| original measurements |
Essential |
Recommended
|
| summary statistics used to characterize distribution |
Recommended |
Recommended
|
| particle size type |
Essential |
Recommended
|
| pretreatment methods |
Essential |
Recommended
|
| anlytical method (e.g. laser diffraction) |
Essential |
Recommended
|
| analytical instrument |
Recommended |
Recommended
|
| interpretation |
Recommended |
Recommended
|
Marine Sediments
See the discussion on the marine sediments working group page.
General
Recommendation for marine sediments
| Question |
New datasets |
Legacy datasets
|
| gear type for collection of the archive |
Recommended |
Recommended
|
| volume of sediment analyzed |
Recommended |
Recommended
|
Alkenones
Recommendation for alkenones on marine sediments
| Question |
New datasets |
Legacy datasets
|
| index value |
Essential |
Essential
|
| method of sediment extraction |
Essential |
Essential
|
| raw peak areas |
Recommended |
Recommended
|
| alkenone concentration |
Essential |
Recommended
|
| C37-C39 compound concentration |
Essential |
Recommended
|
| analytical method (retention time vs mass spec, LOD, LOQ) |
Essential |
Essential
|
Bulk sediment geochemistry
Recommendation for bulk sediment geochemistry on marine sediments
| Question |
New datasets |
Legacy datasets
|
| sample pretreatment |
Essential |
Recommended
|
GDGTs
Recommendation for GDGTs measurements on marine sediments
| Question |
New datasets |
Legacy datasets
|
| GDGT index |
Essential |
Essential
|
| core lipids or IPLs analyzed |
Essential |
Essential
|
| method of sediment extration |
Essential |
Recommended
|
| raw peak areas |
Recommended |
Recommended
|
| definition of the index used |
Essential |
Essential
|
Micropaleontology
Recommendation for micropaleontological determination on marine sediments
| Question |
New datasets |
Legacy datasets
|
| raw counts |
Essential |
Essential
|
| minimum number of speciments |
Essential |
Recommended
|
| size fraction |
Essential |
Essential
|
| seasonality |
Recommended |
Recommended
|
| habitat depth |
Essential |
Recommended
|
| training set |
Recommended |
Recommended
|
Foraminifera
Geochemistry
Recommendation for geochemical measurements on foraminifera
| Question |
New datasets |
Legacy datasets
|
| Genus |
Essential |
Essential
|
| Species |
Essential |
Essential
|
| taxonomy being followed |
Essential |
Recommended
|
Stable Isotopes
Recommendation for stable isotopes measurements on foraminifera
| Question |
New datasets |
Legacy datasets
|
| cleaning methodology |
Essential |
Essential
|
| cleaning methodology reference |
Recommended |
Recommended
|
| number of specimens utilized by sample |
Essential |
Essential
|
| size fraction |
Essential |
Essential
|
| method of sediment disintegration and washing |
Essential |
Recommended
|
| equilibirum offset |
Essential |
Recommended
|
| seasonality |
Recommended |
Recommended
|
| habitat depth |
Essential |
Recommended
|
| standard (e.g. VPDB) |
Essential |
Essential
|
| contamination indicators |
Recommended |
Recommended
|
Trace elements
Recommendation for trace elements measurements on foraminifera
| Question |
New datasets |
Legacy datasets
|
| cleaning methodology |
Essential |
Essential
|
| cleaning methodology reference |
Recommended |
Recommended
|
| number of specimens utilized per sample |
Essential |
Essential
|
| size fraction |
Essential |
Essential
|
| method of sediment disintegration and washing |
Essential |
Essential
|
| correction |
Essential |
Essential
|
| seasonality |
Recommended |
Recommended
|
| habitat depth |
Recommended |
Recommended
|
| contamination indicators |
Essential |
Recommended
|
| standard |
Essential |
Essential
|
Boron isotopes
Recommendation for boron isotopes measurements on foraminifera
| Question |
New datasets |
Legacy datasets
|
| separation method |
Essential |
Essential
|
| analysis method |
Essential |
Essential
|
| sample size (ng of boron analyzed) |
Essential |
Essential
|
| standard |
Essential |
Essential
|
| water depth (benthic foraminifera) |
Essential |
Recommended
|
MARPA
See the discussion on the MARPA working group page. Please note that most of the properties described in this working group formed the basis for the cross-archive recommendations.
Recommendation for MARPA archives
| Question |
New datasets |
Legacy datasets
|
| interpolated chronology |
Essential |
Essential
|
| X-ray pictures |
Recommended |
Recommended
|
Speleothems
See the discussion on the speleothems working group page.
Cave
Recommendation for cave metadata for speleothems archives
| Question |
New datasets |
Legacy datasets
|
| cave geology |
Essential |
Recommended
|
| rock age |
Essential |
Recommended
|
Modern cave conditions
Recommendation for modern cave conditions metadata for speleothems archives
| Question |
New datasets |
Legacy datasets
|
| soil thickness |
Recommended |
Recommended
|
| vegetation type |
Recommended |
Recommended
|
| karst residence time |
Recommended |
Recommended
|
| karst transit time distribution |
Recommended |
Recommended
|
| karst porosity |
Recommended |
Recommended
|
| rock overburden thickness |
Recommended |
Recommended
|
| flow route type |
Recommended |
Recommended
|
| in-cave temperature |
Essential |
Recommended
|
| in-cave humidity |
Essential |
Recommended
|
| in-cave pCO2 |
Essential |
Recommended
|
| in-cave drip rate |
Recommended |
Recommended
|
| in-cave drip chemistry |
Recommended |
Recommended
|
Physical Sample
Recommendation for physical samples metadata for speleothems archives
| Question |
New datasets |
Legacy datasets
|
| distance from cave entrance |
Recommended |
Recommended
|
| thickness of overlying bedrock over the speleothem |
Recommended |
Recommended
|
| speleothem type (e.g. candlestick, flowstone) |
Essential |
Recommended
|
| drip type |
Recommended |
Recommended
|
| type of measurements available |
Essential |
Recommended
|
Sample data
Recommendation for sample data metadata for speleothems archives
| Question |
New datasets |
Legacy datasets
|
| thickness of analyzed sample |
Essential |
Essential
|
| evidence of equilibrium |
Essential |
Recommended
|
| isotope standards |
Essential |
Essential
|
| correction made for aragonite |
Essential |
Recommended
|
Trees
See the discussion on the trees working group page.
Recommendation for trees metadata
| Question |
New datasets |
Legacy datasets
|
| missing ring |
Essential |
Essential
|
| taxonomy (genus/species) |
Essential |
Essential
|
| tree height |
Recommended |
Recommended
|
| tree diameter |
Essential |
Essential
|
| soil description |
Recommended |
Recommended
|
| soil depth |
Recommended |
Recommended
|
| bedrock description |
Desired |
Desired
|
| knots |
Desired |
Desired
|
| ring count |
Essential |
Essential
|
| average ring width |
Essential |
Essential
|
| number of unmeasured innner rings |
Essential |
Desired
|
| number of unmeasured outer rings |
Essential |
Desired
|
| missing heartwood rings to pith |
Essential |
Recommended
|
| missing heartwood rings to pith foundation |
Essential |
Recommended
|
| number of sapwood rings |
Essential |
Recommended
|
| last ring under bark |
Recommended |
Recommended
|
| missing sapwood rings to bark |
Recommended |
Desired
|
| missing sapwood rings to bark foundation |
Recommended |
Desired
|
| pith year |
Essential |
Essential
|
| death year |
Essential |
Essential
|
Detrending
Recommendation for detrending of trees records
| Question |
New datasets |
Legacy datasets
|
| software used |
Essential |
Essential
|
| version used |
Essential |
Recommended
|
| detrending method name (e.g. polynomial, exponential) |
Essential |
Essential
|
| method parameters |
Essential |
Recommended
|
Stable isotopes
Recommendation for stables isotopes measurements on trees
| Question |
New datasets |
Legacy datasets
|
| whether or not a chronology was established |
Essential |
Essential
|
| if there is no chronology (or it is floating) how was age established |
Essential |
Essential
|
| if it is a tropical tree how was the age model established |
Essential |
Essential
|
| were samples pooled or are samples single ring/single tree measurements |
Essential |
Essential
|
| what portion of the ring was analyzed |
Essential |
Essential
|
| whether samples were pre-treated by conversion to alpha cellulose, holo cellulose or left unprocessed |
Essential |
Essential
|
| pretreatment method |
Essential |
Essential
|
| analysis date |
Recommended |
Desired
|
| isotope measured |
Essential |
Essential
|
| 13C data corrected for Seuss effect |
Essential |
Essential
|
| correction used |
Essential |
Essential
|
Chronologies
To know more about the standardization process, check the chronologies working group page.
Absolute chronologies
Lead
Recommendation for chronologies based on lead isotopes
| Question |
New datasets |
Legacy datasets
|
| calculated excess 210Pb values |
Essential |
Essential
|
| 226Ra |
Essential |
Recommended
|
| total 210Pb |
Essential |
Essential
|
| salt correction applied |
Essential |
Recommended
|
| porosity |
Recommended |
Recommended
|
| depth/position |
Essential |
Essential
|
| sample thickness |
Essential |
Essential
|
| core collection date |
Essential |
Essential
|
| methodology used to calculate age |
Essential |
Essential
|
Radiocarbon
Recommendation for chronologies based on radiocarbon
| Question |
New datasets |
Legacy datasets
|
| sample ID |
Essential |
Essential
|
| type/matrix |
Essential |
Essential
|
| chemical pretreatment |
Recommended |
Recommended
|
| analytical method |
Essential |
Essential
|
| laboratory ID |
Essential |
Recommended
|
| d13C ratio |
Recommended |
Recommended
|
| conventional radiocarbon age |
Essential |
Essential
|
| F14C (13C and background correction applied) |
Essential |
Recommended
|
| marine reservoir age |
Essential |
Essential
|
| deltaR value |
Essential |
Essential
|
| hard/soft water effect |
Recommended |
Recommended
|
| other corrections |
Recommended |
Recommended
|
U series
Recommendation for chronologies based on U-series
| Question |
New datasets |
Legacy datasets
|
| all isotopes ratios and concentrations measured |
Essential |
Essential
|
| uncertainty for all parameters |
Essential |
Essential
|
| uncertainty expressed as 2sigma |
Essential |
Essential
|
| state whether uncertainty on decay constant are included in final estimates |
Essential |
Essential
|
| sample identifier |
Essential |
Essential
|
| reference material name |
Essential |
Essential
|
| reference material descriptions |
Essential |
Recommended
|
| reference material values |
Essential |
Essential
|
| decay constant used |
Essential |
Essential
|
| isotopes in spike |
Essential |
Recommended
|
| method of spike calibration |
Essential |
Recommended
|
| method of calibration for all activity or atom ratios reported (e.g. secular equilibirum or gravimetric) |
Essential |
Essential
|
| activity or atom ratios for 230Th/238U (or 230Th/234U) and 234U/238U |
Essential |
Essential
|
| 230Th/232Th activity or atom ratio |
Essential |
Essential
|
| calibration model |
Essential |
Essential
|
| date of analysis or reference age |
Recommended |
Recommended
|
| concentrations of 238U, 234U, 230Th, 232Th (plus 226Ra and Ba if measured) |
Essential |
Essential
|
| sample preparation |
Essential |
Essential
|
| chemical separations |
Essential |
Recommended
|
| sample preservation |
Essential |
Recommended
|
| sample mineralogy |
Recommended |
Recommended
|
| bulk composition and mineral phases (for silicates) |
Essential |
Recommended
|
Relative chronologies
Recommendation for relative chronologies
| Question |
New datasets |
Legacy datasets
|
| original measurements |
Essential |
Essential
|
| alignment target |
Essential |
Essential
|
| labelling features |
Essential |
Recommended
|
| method (employed software or manual) |
Essential |
Essential
|
| flag for mixed chronologies |
Essential |
Recommended
|
Software
Recommendation for chronology software
| Question |
New datasets |
Legacy datasets
|
| method (e.g., Bacon, Oxcal, Bchron, BAM...) |
Essential |
Essential
|
| publication information about the software |
Essential |
Recommended
|
| code |
Desired |
Desired
|
| parameters |
Recommended |
Recommended
|
| ensemble age models if applicable |
Recommended |
Recommended
|
| ensemble statistics if applicable |
Recommended |
Desired
|
Uncertainties
See the discussion on the uncertainties working group page
Measured variables
Recommendation for reporting uncertainties on the measured variables
| Question |
New datasets |
Legacy datasets
|
| analytical uncertainty |
Essential |
Recommended
|
| reproducibility |
Recommended |
Recommended
|
| if based on reproducibility, number of repeat measurements |
Essential |
NA
|
Models
Recommendation for reporting uncertainties on models
| Question |
New datasets |
Legacy datasets
|
| publication information about the software |
Essential |
Recommended
|
| parameters |
Essential |
Recommended
|
| output ensembles |
Recommended |
Recommended
|
| output summary statistics (e.g., mean, media, standard deviation) |
Recommended |
Recommended
|
Road to v2.0
A discussion forum on how to evolve this standard is available through the LinkedEarth site. A blog post summarizing priorities is available here.
