https://wiki.linked.earth/wiki/api.php?action=feedcontributions&feedformat=atom&user=Lcomasbru 2026-04-17T18:54:52Z User contributions MediaWiki 1.26.3 https://wiki.linked.earth/wiki/index.php?title=Category:Speleothem_Working_Group&diff=16764 2017-04-18T16:18:22Z

<p>Lcomasbru: /* Things to describe */</p> <hr /> <div>[[Category:Working Group]]<br /> <br /> == Overview ==<br /> In the Linked Earth context, a [[:Category:Working_Group|working group]] (WG) is a self-organized coalition of knowledgeable experts, whose activities are governed [[:Category:Working_Group|herewith]]. This page is dedicated to the discussion of data and metadata standards for [[:Category:Speleothem | speleothems]], and aims to formulate a set of recommendations for such a standard. <br /> <br /> == Membership ==<br /> __MEMBERS__<br /> <br /> == Specific tasks ==<br /> <br /> We recommend that discussions focus on the following techniques, and explore potential commonalities.<br /> <br /> For each observation type, we recommend:<br /> * structuring discussions around what scientific questions one would want to ask of the data<br /> * listing essential, recommended, and optional information for:<br /> ** the measurements themselves<br /> ** any inference made from the measurements (e.g. calibration to temperature)<br /> ** the underlying uncertainties, and what those numbers correspond to (e.g. 1-sigma or 2-sigma?)<br /> * provide an '''ideal data table''' (or [[Cyrstal2013.paleo1measurement1 | link to one]]) for each type of observation, so the community knows what to report and how to report it.<br /> * provide separate recommendations for new and legacy datasets<br /> <br /> == Things to describe ==<br /> <br /> === Site (cave) ===<br /> <br /> * Site name<br /> * Coordinates<br /> * Elevation<br /> * Geology<br /> * Rock Age<br /> * Have measurements been made of the cave environment over a season or several years (not one off)? Yes/No<br /> <br /> === Entity (speleothem) ===<br /> <br /> * Entity name<br /> * Distance from cave entrance (in m)<br /> * Thickness of overlying bedrock above the speleothem (in m)<br /> * Speleothem type (candlestick stalagmite, stalagmite boss, flowstone)<br /> * Drip type (seepage, seasonal, mixture, unknown)<br /> * Type of measurements available for that entity (stable isotopes, trace metals, organics, fluid inclusions, mineralogy, clumped isotopes, noble gas temperatures, C14, Optical Density of luminosity (ODL), Mg/Ca)<br /> * DOI/link for raw data (e.g NOAA, PANGAEA)<br /> <br /> === References (for each speleothem) ===<br /> <br /> * Citation<br /> * DOI <br /> <br /> === Chronology ===<br /> <br /> Please see the [[:Category:Chronologies_Working_Group| chronologies WG]] for generalities about U/Th dating or layer-counting.<br /> If challenges specific to dating speleothems exist, please list relevant metadata properties below.<br /> <br /> * Date type (MC-ICP-MS, Alpha U/Th, U/Th TIMS, Annual laminations, cross-dating, c14)<br /> * Depth of the sample (in mm)<br /> * Thickness of the sample (in mm)<br /> * lab number<br /> * sample material dated (aragonite powder, calcite)<br /> * min/max weight of sample used for dating<br /> * Is date used in the original age model? Yes/No<br /> * For U/Th samples: uncorrected age, 238U content, 232Th content, 230Th content, 230Th/232Th ratio, 230th/238U activity, decay constants used, corrected age, year of chemistry<br /> <br /> === Age models ===<br /> <br /> * Age model type (linear between dates, polynomial fit, polynomial fit omitting outliers, bayesian, stalAge...)<br /> * For age models based in lamina counting, evidence that laminae are annual<br /> * For age models using C14 for deposition rate, evidence on robustness of assumed linearity<br /> <br /> === Sample data ===<br /> <br /> * Distance from top of speleothem<br /> * Thickness of analysed sample<br /> * Evidence of equilibrium (Hendy tests)<br /> * Year (with uncertainty)<br /> * Measurements with precision<br /> * Isotope standards (PDB, VPDB)<br /> * Correction made for aragonite?<br /> <br /> === Modern Cave Conditions ===<br /> <br /> The interpretation of geochemical or lithological signals embedded in speleothem archives relies sometimes heavily on implicit assumptions about cave hydrology.<br /> What parameters need to be archived to enable long-term re-use and better information extraction from speleothem datasets?<br /> <br /> Above-Cave<br /> * soil thickness<br /> * vegetation type<br /> <br /> In-Karst Hydrology<br /> * karst residence time<br /> * transit time distributions<br /> * porosity<br /> * rock overburden thickness<br /> * flow route type<br /> <br /> In-Cave<br /> * Temperature<br /> * Humidity<br /> * pCO2<br /> * drip-rate<br /> * drip chemistry<br /> <br /> ==References==<br /> &lt;references \&gt;</div>

Lcomasbru https://wiki.linked.earth/wiki/index.php?title=Category:Speleothem_Working_Group&diff=15975 2017-03-31T18:10:50Z

<p>Lcomasbru: /* Things to describe */</p> <hr /> <div>[[Category:Working Group]]<br /> <br /> == Overview ==<br /> In the Linked Earth context, a [[:Category:Working_Group|working group]] (WG) is a self-organized coalition of knowledgeable experts, whose activities are governed [[:Category:Working_Group|herewith]]. This page is dedicated to the discussion of data and metadata standards for [[:Category:Speleothem | speleothems]], and aims to formulate a set of recommendations for such a standard. <br /> <br /> == Membership ==<br /> __MEMBERS__<br /> <br /> == Specific tasks ==<br /> <br /> We recommend that discussions focus on the following techniques, and explore potential commonalities.<br /> <br /> For each observation type, we recommend:<br /> * structuring discussions around what scientific questions one would want to ask of the data<br /> * listing essential, recommended, and optional information for:<br /> ** the measurements themselves<br /> ** any inference made from the measurements (e.g. calibration to temperature)<br /> ** the underlying uncertainties, and what those numbers correspond to (e.g. 1-sigma or 2-sigma?)<br /> * provide an '''ideal data table''' (or [[Cyrstal2013.paleo1measurement1 | link to one]]) for each type of observation, so the community knows what to report and how to report it.<br /> * provide separate recommendations for new and legacy datasets<br /> <br /> == Things to describe ==<br /> === Observations ===<br /> <br /> * stable isotopes<br /> * trace metals<br /> * organics<br /> * fluid inclusions<br /> * mineralogy<br /> * clumped isotopes<br /> * noble gas temperatures<br /> * C14<br /> * Optical Density of luminosity (ODL)<br /> * Mg/Ca<br /> <br /> === Hydrology ===<br /> <br /> The interpretation of geochemical or lithological signals embedded in speleothem archives relies sometimes heavily on implicit assumptions about cave hydrology.<br /> What parameters need to be archived to enable long-term re-use and better information extraction from speleothem datasets?<br /> A few come to mind:<br /> <br /> * karst residence time<br /> * transit time distributions<br /> * porosity<br /> * soil thickness<br /> <br /> === Chronology ===<br /> Please see the [[:CategoryChronologies_Working_Group| chronologies WG]] for generalities about U/Th dating or layer-counting.<br /> If challenges specific to dating speleothems exist, please list relevant metadata properties below.<br /> <br /> * For age models based in lamina counting, evidence that laminae are annual<br /> * For age models using C14 for deposition rate, evidence on robustness of assumed linearity<br /> <br /> === Sample data ===<br /> <br /> * Distance from top of speleothem<br /> * Thickness of analysed sample<br /> * Evidence of equilibrium (Hendy tests)<br /> * Year (with uncertainty)<br /> <br /> ==References==<br /> &lt;references \&gt;</div>

Lcomasbru https://wiki.linked.earth/wiki/index.php?title=Category:Speleothem_Working_Group&diff=15974 2017-03-31T18:04:42Z

<p>Lcomasbru: /* Observations */</p> <hr /> <div>[[Category:Working Group]]<br /> <br /> == Overview ==<br /> In the Linked Earth context, a [[:Category:Working_Group|working group]] (WG) is a self-organized coalition of knowledgeable experts, whose activities are governed [[:Category:Working_Group|herewith]]. This page is dedicated to the discussion of data and metadata standards for [[:Category:Speleothem | speleothems]], and aims to formulate a set of recommendations for such a standard. <br /> <br /> == Membership ==<br /> __MEMBERS__<br /> <br /> == Specific tasks ==<br /> <br /> We recommend that discussions focus on the following techniques, and explore potential commonalities.<br /> <br /> For each observation type, we recommend:<br /> * structuring discussions around what scientific questions one would want to ask of the data<br /> * listing essential, recommended, and optional information for:<br /> ** the measurements themselves<br /> ** any inference made from the measurements (e.g. calibration to temperature)<br /> ** the underlying uncertainties, and what those numbers correspond to (e.g. 1-sigma or 2-sigma?)<br /> * provide an '''ideal data table''' (or [[Cyrstal2013.paleo1measurement1 | link to one]]) for each type of observation, so the community knows what to report and how to report it.<br /> * provide separate recommendations for new and legacy datasets<br /> <br /> == Things to describe ==<br /> === Observations ===<br /> <br /> * stable isotopes<br /> * trace metals<br /> * organics<br /> * fluid inclusions<br /> * mineralogy<br /> * clumped isotopes<br /> * noble gas temperatures<br /> * C14<br /> * Optical Density of luminosity (ODL)<br /> * Mg/Ca<br /> <br /> === Hydrology ===<br /> <br /> The interpretation of geochemical or lithological signals embedded in speleothem archives relies sometimes heavily on implicit assumptions about cave hydrology.<br /> What parameters need to be archived to enable long-term re-use and better information extraction from speleothem datasets?<br /> A few come to mind:<br /> <br /> * karst residence time<br /> * transit time distributions<br /> * porosity<br /> * soil thickness<br /> <br /> === Chronology ===<br /> Please see the [[:CategoryChronologies_Working_Group| chronologies WG]] for generalities about U/Th dating or layer-counting.<br /> If challenges specific to dating speleothems exist, please list relevant metadata properties below.<br /> <br /> <br /> ==References==<br /> &lt;references \&gt;</div>

Lcomasbru https://wiki.linked.earth/wiki/index.php?title=Category:Speleothem_Working_Group&diff=15973 2017-03-31T18:03:20Z

<p>Lcomasbru: correct a typo</p> <hr /> <div>[[Category:Working Group]]<br /> <br /> == Overview ==<br /> In the Linked Earth context, a [[:Category:Working_Group|working group]] (WG) is a self-organized coalition of knowledgeable experts, whose activities are governed [[:Category:Working_Group|herewith]]. This page is dedicated to the discussion of data and metadata standards for [[:Category:Speleothem | speleothems]], and aims to formulate a set of recommendations for such a standard. <br /> <br /> == Membership ==<br /> __MEMBERS__<br /> <br /> == Specific tasks ==<br /> <br /> We recommend that discussions focus on the following techniques, and explore potential commonalities.<br /> <br /> For each observation type, we recommend:<br /> * structuring discussions around what scientific questions one would want to ask of the data<br /> * listing essential, recommended, and optional information for:<br /> ** the measurements themselves<br /> ** any inference made from the measurements (e.g. calibration to temperature)<br /> ** the underlying uncertainties, and what those numbers correspond to (e.g. 1-sigma or 2-sigma?)<br /> * provide an '''ideal data table''' (or [[Cyrstal2013.paleo1measurement1 | link to one]]) for each type of observation, so the community knows what to report and how to report it.<br /> * provide separate recommendations for new and legacy datasets<br /> <br /> == Things to describe ==<br /> === Observations ===<br /> <br /> * stable isotopes<br /> * trace metals<br /> <br /> === Hydrology ===<br /> <br /> The interpretation of geochemical or lithological signals embedded in speleothem archives relies sometimes heavily on implicit assumptions about cave hydrology.<br /> What parameters need to be archived to enable long-term re-use and better information extraction from speleothem datasets?<br /> A few come to mind:<br /> <br /> * karst residence time<br /> * transit time distributions<br /> * porosity<br /> * soil thickness<br /> <br /> === Chronology ===<br /> Please see the [[:CategoryChronologies_Working_Group| chronologies WG]] for generalities about U/Th dating or layer-counting.<br /> If challenges specific to dating speleothems exist, please list relevant metadata properties below.<br /> <br /> <br /> ==References==<br /> &lt;references \&gt;</div>

Lcomasbru https://wiki.linked.earth/wiki/index.php?title=Laia_Comas_Bru&diff=13004 2016-11-14T16:15:18Z

<p>Lcomasbru: Added PropertyValue: Subscribes To = Category:Speleothem_Working_Group</p> <hr /> <div>[[Category:Person_©]]{{#set:<br /> Has User ID=Lcomasbru|<br /> Subscribes To=Category:Speleothem_Working_Group}}</div>

Lcomasbru https://wiki.linked.earth/wiki/index.php?title=Laia_Comas_Bru&diff=13003 2016-11-14T16:15:07Z

<p>Lcomasbru: Added PropertyValue: Has_User_ID = Lcomasbru</p> <hr /> <div>[[Category:Person_©]]{{#set:|<br /> Has User ID=Lcomasbru}}</div>

Lcomasbru https://wiki.linked.earth/wiki/index.php?title=Laia_Comas_Bru&diff=13002 2016-11-14T16:15:06Z

<p>Lcomasbru: Setting categories as Person_©</p> <hr /> <div>[[Category:Person_©]]</div>

Lcomasbru