cometadata/datacite-titles-descriptions-related-identifiers huggingface dataset:
DOI: 10.5281/zenodo.18197333
title: TCOM-CH4: TOMCAT CTM and Occultation Measurements based daily  methane profile data set

description: Methodology:  

The TOMCAT simulation was conducted at a T64L32 resolution, consistent with previous work by Dhomse and Chipperfield (2023), covering the period from 2000 to 2024. These simulations utilized ERA-5 reanalysis data.

CH4 Profile Processing and Bias Correction

Collocated CH4 profiles are organized into five distinct latitude bins:



NH polar: 90∘N - 50∘N

NH mid-lat: 20∘N - 70∘N

Tropics: 40∘S - 40∘N

SH mid-lat: 70∘S - 20∘S

SH polar: 90∘S - 50∘S


 Initially, TOMCAT tracers are interpolated on the ACE FTS height (1km to 50km) Separate XGBoost regression models are trained to predict ACE FTS measurements for a given altitude /latitude bin if more than 2000 measurements are available. XGBoost model is then used to estimate CH4 volume mixing ratios for all the TOMCAT grids.  Height resolved data are then interpolated on 22-pressure levels. For overlapping latitude bins, we use averages and then calculate daily zonal mean values.  For more details see attached presentation.

Dataset also includes two files containing daily mean zonal mean CH4 profiles on height (1-50 km) and pressure (300-1 hPa) – 22 levels (9132 days/64 latitudes). Files also include uncertainties estimated using quantile regression and uncertainty = NaN means data is from TOMCAT CTM (scientifically useful range 5 to 25km).

zmch4_tcom_hlev_2000-2024_V2.0.nc – height level data (1 to 50 km)

zmch4_tcom_plev_2000-2024_V2.0.nc – pressure level data (300 to 1 hPa)

Daily 3D profiles on height and pressure levels would be made available on request. Xarrays “resample” can be used to get monthly means.

(attached pdf file gives more details. This data set improves from our previous methodology (Dhomse and Chipperfield, 2023, ESSD) and manuscript describing to those updates is submitted to ESSD as Dhomse and Chipperfield, 2026.

 

Reference Publications

This methodology, incorporating only ACE-FTS data and various minor algorithmic developments, is based on the following publication:

Dhomse, S. S. and Chipperfield, M. P.: Using machine learning to construct TOMCAT model and occultation measurement-based stratospheric methane (TCOM-CH4) and nitrous oxide (TCOM-N2O) profile data sets, Earth Syst. Sci. Data, 15, 5105–5120, https://doi.org/10.5194/essd-15-5105-2023, 2023

Dhomse, S. S. and Chipperfield, M. P.: TCOM-CFC11 and TCOM-CFC12: A Gap-Free, Observationally Constrained Global Dataset of Stratospheric CFC11 and CFC12 Profiles (V2)., submitted to Earth Syst. Sci. Data, 2026
DOI: 10.5281/zenodo.7293739
title: TCOM-CH4: TOMCAT CTM and Occultation Measurements based daily  methane profile data set

description: Methodology:  

The TOMCAT simulation was conducted at a T64L32 resolution, consistent with previous work by Dhomse and Chipperfield (2023), covering the period from 2000 to 2024. These simulations utilized ERA-5 reanalysis data.

CH4 Profile Processing and Bias Correction

Collocated CH4 profiles are organized into five distinct latitude bins:



NH polar: 90∘N - 50∘N

NH mid-lat: 20∘N - 70∘N

Tropics: 40∘S - 40∘N

SH mid-lat: 70∘S - 20∘S

SH polar: 90∘S - 50∘S


 Initially, TOMCAT tracers are interpolated on the ACE FTS height (1km to 50km) Separate XGBoost regression models are trained to predict ACE FTS measurements for a given altitude /latitude bin if more than 2000 measurements are available. XGBoost model is then used to estimate CH4 volume mixing ratios for all the TOMCAT grids.  Height resolved data are then interpolated on 22-pressure levels. For overlapping latitude bins, we use averages and then calculate daily zonal mean values.  For more details see attached presentation.

Dataset also includes two files containing daily mean zonal mean CH4 profiles on height (1-50 km) and pressure (300-1 hPa) – 22 levels (9132 days/64 latitudes). Files also include uncertainties estimated using quantile regression and uncertainty = NaN means data is from TOMCAT CTM (scientifically useful range 5 to 25km).

zmch4_tcom_hlev_2000-2024_V2.0.nc – height level data (1 to 50 km)

zmch4_tcom_plev_2000-2024_V2.0.nc – pressure level data (300 to 1 hPa)

Daily 3D profiles on height and pressure levels would be made available on request. Xarrays “resample” can be used to get monthly means.

(attached pdf file gives more details. This data set improves from our previous methodology (Dhomse and Chipperfield, 2023, ESSD) and manuscript describing to those updates is submitted to ESSD as Dhomse and Chipperfield, 2026.

 

Reference Publications

This methodology, incorporating only ACE-FTS data and various minor algorithmic developments, is based on the following publication:

Dhomse, S. S. and Chipperfield, M. P.: Using machine learning to construct TOMCAT model and occultation measurement-based stratospheric methane (TCOM-CH4) and nitrous oxide (TCOM-N2O) profile data sets, Earth Syst. Sci. Data, 15, 5105–5120, https://doi.org/10.5194/essd-15-5105-2023, 2023

Dhomse, S. S. and Chipperfield, M. P.: TCOM-CFC11 and TCOM-CFC12: A Gap-Free, Observationally Constrained Global Dataset of Stratospheric CFC11 and CFC12 Profiles (V2)., submitted to Earth Syst. Sci. Data, 2026
DOI: 10.5281/zenodo.17478980
title: IODP Expedition 324 Natural gamma radiation

description: Natural gamma radiation (NGR) data in the ~0.1 to 3.0 MeV range were measured using eight custom-designed sodium iodide (thallium) [NaI(Tl)] detectors arranged along the core measurement axis at 20 cm intervals. The NGR system uses layers of passive shielding (lead) and active shielding (plastic scintillators and coincidence electronics) to reduce the cosmic-ray signal for low-count analysis of sediment core sections and to obtain the maximum signal-to-noise ratio. Data are reported on a total counts per second basis and the raw spectral files are available as compressed files for later analysis.
DOI: 10.5281/zenodo.17478979
title: IODP Expedition 324 Natural gamma radiation

description: Natural gamma radiation (NGR) data in the ~0.1 to 3.0 MeV range were measured using eight custom-designed sodium iodide (thallium) [NaI(Tl)] detectors arranged along the core measurement axis at 20 cm intervals. The NGR system uses layers of passive shielding (lead) and active shielding (plastic scintillators and coincidence electronics) to reduce the cosmic-ray signal for low-count analysis of sediment core sections and to obtain the maximum signal-to-noise ratio. Data are reported on a total counts per second basis and the raw spectral files are available as compressed files for later analysis.
DOI: 10.5281/zenodo.17478976
title: IODP Expedition 324 Magnetic susceptibility (point or contact system)

description: Magnetic susceptibility was measured on section halves on the Section Half Multisensor Logger (SHMSL) using a Bartington MS2 meter and either a MS2E or MS2K probe. Because all JRSO cores meet minimum size requirements for these two probes, MSPOINT data are corrected for volume and recorded in SI susceptibility units (x10-5).
DOI: 10.5281/zenodo.17478975
title: IODP Expedition 324 Magnetic susceptibility (point or contact system)

description: Magnetic susceptibility was measured on section halves on the Section Half Multisensor Logger (SHMSL) using a Bartington MS2 meter and either a MS2E or MS2K probe. Because all JRSO cores meet minimum size requirements for these two probes, MSPOINT data are corrected for volume and recorded in SI susceptibility units (x10-5).
DOI: 10.6084/m9.figshare.29148893
title: Dispersal-Ability_Speciation_Emberizoidea

description: This repository contains the code to reproduce the results obtained for "The effects of the dispersal ability in the diversification dynamics of Emberizoidea (Aves: Passeriformes)"; published on <i>Evolution</i>.It is divided in four self-contained directories, each one with a .pdf and a .Rmd, the pdf is a rendered version of the explained code that shows all the results, while the .Rmd is an editable and self reproducible code..Rmd files should run out of the box if the whole folder is downloaded and the code is repdroduced from there.The folders are organized depending on the method they replicate. -QuaSSE folder: Using this code you can calculate the Quantitative State-dependent Speciation and Extinction models -Cor-Strates folder: Using this code you can replicate the "Correlated Speciation and Trait Rates simulations" frameworks -brms folder: Using this code you can perform the Multilevel Bayesian Regression Model -SecSSE folder: Using this code you can perform the SecSSE models.<br>
DOI: 10.6084/m9.figshare.29148893.v1
title: Dispersal-Ability_Speciation_Emberizoidea

description: This repository contains the code to reproduce the results obtained for "The effects of the dispersal ability in the diversification dynamics of Emberizoidea (Aves: Passeriformes)"; published on <i>Evolution</i>.It is divided in four self-contained directories, each one with a .pdf and a .Rmd, the pdf is a rendered version of the explained code that shows all the results, while the .Rmd is an editable and self reproducible code..Rmd files should run out of the box if the whole folder is downloaded and the code is repdroduced from there.The folders are organized depending on the method they replicate. -QuaSSE folder: Using this code you can calculate the Quantitative State-dependent Speciation and Extinction models -Cor-Strates folder: Using this code you can replicate the "Correlated Speciation and Trait Rates simulations" frameworks -brms folder: Using this code you can perform the Multilevel Bayesian Regression Model -SecSSE folder: Using this code you can perform the SecSSE models.<br>
DOI: 10.5281/zenodo.17478973
title: IODP Expedition 324 Magnetic susceptibility (whole round)

description: Magnetic susceptibility was measured on whole-round sections (and rarely section halves) on the Whole-Round Multisensor Logger (WRMSL) and/or Special Task Multisensor Logger (STMSL) using a Bartington MS2 meter and a 90 mm or 80 mm MS2C loop. As volume of the sample is not controlled for this experiment, susceptibility units are recorded in instrument units and are not volume-corrected.
DOI: 10.5281/zenodo.17478974
title: IODP Expedition 324 Magnetic susceptibility (whole round)

description: Magnetic susceptibility was measured on whole-round sections (and rarely section halves) on the Whole-Round Multisensor Logger (WRMSL) and/or Special Task Multisensor Logger (STMSL) using a Bartington MS2 meter and a 90 mm or 80 mm MS2C loop. As volume of the sample is not controlled for this experiment, susceptibility units are recorded in instrument units and are not volume-corrected.
DOI: 10.15468/dl.vc9kdh
title: Occurrence Download

description: A dataset containing 118 species occurrences available in GBIF matching the query:
{
 "and" : [
 "TaxonKey is Bromus bromoideus (Lej.) Crép.",
 "HasCoordinate is true",
 "HasGeospatialIssue is false"
 ]
}

 The dataset includes 118 records from 11 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0289978-210914110416597/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.15468/dl.t8vuuq
title: Occurrence Download

description: A dataset containing 38118 species occurrences available in GBIF matching the query:
{
 "and" : [
 "TaxonKey is Valerianella carinata Loisel.",
 "HasCoordinate is true",
 "HasGeospatialIssue is false"
 ]
}

 The dataset includes 38118 records from 255 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0257613-210914110416597/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.15468/dl.v734vz
title: Occurrence Download

description: A dataset containing 149 species occurrences available in GBIF matching the query:
{
 "and" : [
 "TaxonKey is Mantisalca duriaei (Spach) Briq. & Cavill.",
 "HasCoordinate is true",
 "HasGeospatialIssue is false"
 ]
}

 The dataset includes 149 records from 26 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0299693-210914110416597/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.15468/dl.ryzs3k
title: Occurrence Download

description: A dataset containing 29510 species occurrences available in GBIF matching the query:
{
 "and" : [
 "TaxonKey is Dactylorhiza sambucina (L.) Soó",
 "HasCoordinate is true",
 "HasGeospatialIssue is false"
 ]
}

 The dataset includes 29510 records from 158 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0295411-210914110416597/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.15468/dl.ucctdx
title: Occurrence Download

description: A dataset containing 2237 species occurrences available in GBIF matching the query:
{
 "and" : [
 "TaxonKey is Iberodes linifolia (L.) Serrano, R.Carbajal & S.Ortiz",
 "HasCoordinate is true",
 "HasGeospatialIssue is false"
 ]
}

 The dataset includes 2237 records from 66 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0300798-210914110416597/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.15468/dl.u6vw85
title: Occurrence Download

description: A dataset containing 3717 species occurrences available in GBIF matching the query:
{
 "and" : [
 "TaxonKey is Parietaria lusitanica L.",
 "HasCoordinate is true",
 "HasGeospatialIssue is false"
 ]
}

 The dataset includes 3717 records from 82 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0297812-210914110416597/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.15468/dl.vaz3ja
title: Occurrence Download

description: A dataset containing 142 species occurrences available in GBIF matching the query:
{
 "and" : [
 "TaxonKey is Sideritis italica (Mill.) Greuter & Burdet",
 "HasCoordinate is true",
 "HasGeospatialIssue is false"
 ]
}

 The dataset includes 142 records from 15 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0288607-210914110416597/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.15468/dl.sjdyud
title: Occurrence Download

description: A dataset containing 45795 species occurrences available in GBIF matching the query:
{
 "and" : [
 "TaxonKey is Pinus strobus L.",
 "HasCoordinate is true",
 "HasGeospatialIssue is false"
 ]
}

 The dataset includes 45795 records from 283 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0294544-210914110416597/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.15468/dl.vht42q
title: Occurrence Download

description: A dataset containing 390 species occurrences available in GBIF matching the query:
{
 "and" : [
 "TaxonKey is Centaurea deusta Ten.",
 "HasCoordinate is true",
 "HasGeospatialIssue is false"
 ]
}

 The dataset includes 390 records from 26 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0293160-210914110416597/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.15468/dl.uuy8yu
title: Occurrence Download

description: A dataset containing 13 species occurrences available in GBIF matching the query:
{
 "and" : [
 "TaxonKey is Phyllolepidium rupestre (Ten.) Trinajstic",
 "HasCoordinate is true",
 "HasGeospatialIssue is false"
 ]
}

 The dataset includes 13 records from 8 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0295328-210914110416597/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.15468/dl.t8sqpq
title: Occurrence Download

description: A dataset containing 8490 species occurrences available in GBIF matching the query:
{
 "and" : [
 "TaxonKey is Solanum villosum Mill.",
 "HasCoordinate is true",
 "HasGeospatialIssue is false"
 ]
}

 The dataset includes 8490 records from 212 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0259348-210914110416597/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.15468/dl.usaarw
title: Occurrence Download

description: A dataset containing 75 species occurrences available in GBIF matching the query:
{
 "and" : [
 "TaxonKey is Trisetum argenteum (Willd.) Roem. & Schult.",
 "HasCoordinate is true",
 "HasGeospatialIssue is false"
 ]
}

 The dataset includes 75 records from 16 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0286587-210914110416597/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.15468/dl.m2k4zy
title: Occurrence Download

description: A dataset containing 198198 species occurrences available in GBIF matching the query:
{
 "and" : [
 "TaxonKey is Trifolium campestre Schreb.",
 "HasCoordinate is true",
 "HasGeospatialIssue is false"
 ]
}

 The dataset includes 198198 records from 887 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0257966-210914110416597/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.15468/dl.trn2aq
title: Occurrence Download

description: A dataset containing 616 species occurrences available in GBIF matching the query:
{
 "and" : [
 "TaxonKey is Nematoda",
 "DatasetKey is Species data for Scottish waters held and managed by Scottish Natural Heritage, derived from benthic surveys 1993 to 2018",
 "HasCoordinate is true",
 "HasGeospatialIssue is false",
 "Geometry POLYGON ((-25.03991 31.75, 41.65954 31.75, 41.65954 71.53037, -25.03991 71.53037, -25.03991 31.75))"
 ]
}

 The dataset includes 616 records from 1 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0212247-230224095556074/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.15468/dl.vz9m29
title: Occurrence Download

description: A dataset containing 14610 species occurrences available in GBIF matching the query:
{
 "and" : [
 "TaxonKey is one of (Anthropoides virgo (Linnaeus, 1758))",
 "BasisOfRecord is one of (Specimen, Human Observation, Observation, Machine Observation)",
 "HasCoordinate is true",
 "HasGeospatialIssue is false"
 ]
}

 The dataset includes 14610 records from 64 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0295824-220831081235567/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.25549/inscriptifact-ouc112044830
title: Cuneiform Tablet 1913.14.0147, Spurlock 1913.14.0147

description: [Text Description:] Administrative tablet ❧ [Text or Publication Number Note:] Spurlock 1913.14.0147; CDLI P420528 ❧ [Medium:] Clay ❧ [Script Note:] Non-Alphabetic Cuneiform ❧ [Physical Object Description:] Pale Orange Yellow (10YR 8/2.5) ❧ [Physical Object Note:] 6.6 x 4.7 x 2.6 cm (93g) ❧ [Physical Object Note:] Seal impressions
DOI: 10.15468/dl.hx84x9
title: Occurrence Download

description: A dataset containing 239 species occurrences available in GBIF matching the query:
{
 "and" : [
 "TaxonKey is Aphelandra sinclairiana Nees",
 "HasCoordinate is true"
 ]
}

 The dataset includes 239 records from 27 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0095470-220831081235567/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.15468/dl.4ycrd8
title: Occurrence Download

description: A dataset containing 120 species occurrences available in GBIF matching the query:
{
 "TaxonKey" : [
 "is Olivella anazora (Duclos, 1835)"
 ]
}

 The dataset includes 120 records from 23 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0094402-220831081235567/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.25549/inscriptifact-ouc112043693
title: Cuneiform Tablet 1913.14.0146, Spurlock 1913.14.0146

description: [Text Description:] Administrative tablet ❧ [Text or Publication Number Note:] Spurlock 1913.14.0146; CDLI P420527 ❧ [Medium:] Clay ❧ [Script Note:] Non-Alphabetic Cuneiform ❧ [Physical Object Description:] Pale Orange Yellow (10YR 8/3) ❧ [Physical Object Note:] 8.2x4.9 x 2.5 cm (110g)
DOI: 10.15468/dl.68xfsu
title: Occurrence Download

description: A dataset containing 512 species occurrences available in GBIF matching the query:
{
 "and" : [
 "TaxonKey is Nematoda",
 "DatasetKey is REBENT - Réseau national de surveillance des biocénoses benthiques côtières",
 "HasCoordinate is true",
 "HasGeospatialIssue is false",
 "Geometry POLYGON ((-25.03991 31.75, 41.65954 31.75, 41.65954 71.53037, -25.03991 71.53037, -25.03991 31.75))"
 ]
}

 The dataset includes 512 records from 1 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0212253-230224095556074/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.15468/dl.fkthrk
title: Occurrence Download

description: A dataset containing 71 species occurrences available in GBIF matching the query:
{
 "and" : [
 "Country is Argentina",
 "TaxonKey is Ludwigia octovalvis (Jacq.) P.H.Raven"
 ]
}

 The dataset includes 71 records from 17 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0297554-220831081235567/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.25549/inscriptifact-ouc112043723
title: Cuneiform Tablet 1913.14.0146, Spurlock 1913.14.0146

description: [Text Description:] Administrative tablet ❧ [Text or Publication Number Note:] Spurlock 1913.14.0146; CDLI P420527 ❧ [Medium:] Clay ❧ [Script Note:] Non-Alphabetic Cuneiform ❧ [Physical Object Description:] Pale Orange Yellow (10YR 8/3) ❧ [Physical Object Note:] 8.2x4.9 x 2.5 cm (110g)
DOI: 10.15468/dl.swa5cq
title: Occurrence Download

description: A dataset containing 0 species occurrences available in GBIF matching the query:
{
 "and" : [
 "TaxonKey is Nematoda",
 "DatasetKey is GEO-Hauptveranstaltung Bodden (Vilm)",
 "HasCoordinate is true",
 "HasGeospatialIssue is false",
 "Geometry POLYGON ((-25.03991 31.75, 41.65954 31.75, 41.65954 71.53037, -25.03991 71.53037, -25.03991 31.75))"
 ]
}

 The dataset includes 0 records from 0 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0212250-230224095556074/datasets/export for details.
DOI: 10.15468/dl.76vnfs
title: Occurrence Download

description: A dataset containing 231 species occurrences available in GBIF matching the query:
{
 "and" : [
 "BasisOfRecord is Specimen",
 "Country is Mexico",
 "HasCoordinate is true",
 "HasGeospatialIssue is false",
 "TaxonKey is Abronia taeniata (Wiegmann, 1828)"
 ]
}

 The dataset includes 231 records from 19 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0030940-220831081235567/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.