Harmonized chronologies of a global late Quaternary pollen dataset (LegacyAge 1.0)
<p>We present a chronology framework named LegacyAge 1.0 containing harmonized chronologies for 2831 pollen records (downloaded from the Neotoma Paleoecology Database and the supplementary Asian datasets) together with their age control points and metadata in machine-readable data formats. All...
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| Format: | Article |
| Language: | English |
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Copernicus Publications
2022-03-01
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| Series: | Earth System Science Data |
| Online Access: | https://essd.copernicus.org/articles/14/1331/2022/essd-14-1331-2022.pdf |
| _version_ | 1818772845799407616 |
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| author | C. Li C. Li A. K. Postl T. Böhmer X. Cao X. Cao A. M. Dolman U. Herzschuh U. Herzschuh U. Herzschuh |
| author_facet | C. Li C. Li A. K. Postl T. Böhmer X. Cao X. Cao A. M. Dolman U. Herzschuh U. Herzschuh U. Herzschuh |
| author_sort | C. Li |
| collection | DOAJ |
| description | <p>We present a chronology framework named LegacyAge 1.0
containing harmonized chronologies for 2831 pollen records (downloaded from
the Neotoma Paleoecology Database and the supplementary Asian datasets)
together with their age control points and metadata in machine-readable data
formats. All chronologies use the Bayesian framework implemented in Bacon
version 2.5.3. Optimal parameter settings of priors (accumulation.shape,
memory.strength, memory.mean, accumulation.rate, and thickness) were identified
based on information in the original publication or iteratively after
preliminary model inspection. The most common control points for the
chronologies are radiocarbon dates (86.1 %), calibrated by the latest
calibration curves (IntCal20 and SHCal20 for the terrestrial radiocarbon
dates in the Northern Hemisphere and Southern Hemisphere and Marine20 for marine
materials). The original publications were consulted when dealing with
outliers and inconsistencies. Several major challenges when setting up the
chronologies included the waterline issue (18.8 % of records), reservoir effect (4.9 %), and sediment deposition discontinuity (4.4 %). Finally, we numerically compare the LegacyAge 1.0 chronologies to those published in the original publications and show that the reliability of the chronologies of 95.4 % of records could be improved according to our assessment. Our chronology framework and revised chronologies provide the opportunity to make use of the ages and age uncertainties in synthesis studies of, for example, pollen-based vegetation and climate change. The LegacyAge 1.0 dataset, including metadata, datings, harmonized chronologies, and R code used, is open-access and available at PANGAEA (<a href="https://doi.org/10.1594/PANGAEA.933132">https://doi.org/10.1594/PANGAEA.933132</a>; Li et al., 2021) and Zenodo (<a href="https://doi.org/10.5281/zenodo.5815192">https://doi.org/10.5281/zenodo.5815192</a>; Li et al., 2022), respectively.</p> |
| first_indexed | 2024-12-18T10:15:50Z |
| format | Article |
| id | doaj.art-405efb63b5c24b52b0bc246f64a19293 |
| institution | Directory Open Access Journal |
| issn | 1866-3508 1866-3516 |
| language | English |
| last_indexed | 2024-12-18T10:15:50Z |
| publishDate | 2022-03-01 |
| publisher | Copernicus Publications |
| record_format | Article |
| series | Earth System Science Data |
| spelling | doaj.art-405efb63b5c24b52b0bc246f64a192932022-12-21T21:11:17ZengCopernicus PublicationsEarth System Science Data1866-35081866-35162022-03-01141331134310.5194/essd-14-1331-2022Harmonized chronologies of a global late Quaternary pollen dataset (LegacyAge 1.0)C. Li0C. Li1A. K. Postl2T. Böhmer3X. Cao4X. Cao5A. M. Dolman6U. Herzschuh7U. Herzschuh8U. Herzschuh9Polar Terrestrial Environmental Systems, Alfred Wegener Institute Helmholtz Centre for Polar and Marine Research, Telegrafenberg A45, 14473 Potsdam, GermanyInstitute of Environmental Science and Geography, University of Potsdam, Karl-Liebknecht-Str. 24–25, 14476 Potsdam, GermanyPolar Terrestrial Environmental Systems, Alfred Wegener Institute Helmholtz Centre for Polar and Marine Research, Telegrafenberg A45, 14473 Potsdam, GermanyPolar Terrestrial Environmental Systems, Alfred Wegener Institute Helmholtz Centre for Polar and Marine Research, Telegrafenberg A45, 14473 Potsdam, GermanyPolar Terrestrial Environmental Systems, Alfred Wegener Institute Helmholtz Centre for Polar and Marine Research, Telegrafenberg A45, 14473 Potsdam, GermanyAlpine Paleoecology and Human Adaptation Group (ALPHA), State Key Laboratory of Tibetan Plateau Earth System, Resources and Environment (TPESRE), Institute of Tibetan Plateau Research, Chinese Academy of Sciences, 100101 Beijing, ChinaPolar Terrestrial Environmental Systems, Alfred Wegener Institute Helmholtz Centre for Polar and Marine Research, Telegrafenberg A45, 14473 Potsdam, GermanyPolar Terrestrial Environmental Systems, Alfred Wegener Institute Helmholtz Centre for Polar and Marine Research, Telegrafenberg A45, 14473 Potsdam, GermanyInstitute of Environmental Science and Geography, University of Potsdam, Karl-Liebknecht-Str. 24–25, 14476 Potsdam, GermanyInstitute of Biochemistry and Biology, University of Potsdam, Karl-Liebknecht-Str. 24–25, 14476 Potsdam, Germany<p>We present a chronology framework named LegacyAge 1.0 containing harmonized chronologies for 2831 pollen records (downloaded from the Neotoma Paleoecology Database and the supplementary Asian datasets) together with their age control points and metadata in machine-readable data formats. All chronologies use the Bayesian framework implemented in Bacon version 2.5.3. Optimal parameter settings of priors (accumulation.shape, memory.strength, memory.mean, accumulation.rate, and thickness) were identified based on information in the original publication or iteratively after preliminary model inspection. The most common control points for the chronologies are radiocarbon dates (86.1 %), calibrated by the latest calibration curves (IntCal20 and SHCal20 for the terrestrial radiocarbon dates in the Northern Hemisphere and Southern Hemisphere and Marine20 for marine materials). The original publications were consulted when dealing with outliers and inconsistencies. Several major challenges when setting up the chronologies included the waterline issue (18.8 % of records), reservoir effect (4.9 %), and sediment deposition discontinuity (4.4 %). Finally, we numerically compare the LegacyAge 1.0 chronologies to those published in the original publications and show that the reliability of the chronologies of 95.4 % of records could be improved according to our assessment. Our chronology framework and revised chronologies provide the opportunity to make use of the ages and age uncertainties in synthesis studies of, for example, pollen-based vegetation and climate change. The LegacyAge 1.0 dataset, including metadata, datings, harmonized chronologies, and R code used, is open-access and available at PANGAEA (<a href="https://doi.org/10.1594/PANGAEA.933132">https://doi.org/10.1594/PANGAEA.933132</a>; Li et al., 2021) and Zenodo (<a href="https://doi.org/10.5281/zenodo.5815192">https://doi.org/10.5281/zenodo.5815192</a>; Li et al., 2022), respectively.</p>https://essd.copernicus.org/articles/14/1331/2022/essd-14-1331-2022.pdf |
| spellingShingle | C. Li C. Li A. K. Postl T. Böhmer X. Cao X. Cao A. M. Dolman U. Herzschuh U. Herzschuh U. Herzschuh Harmonized chronologies of a global late Quaternary pollen dataset (LegacyAge 1.0) Earth System Science Data |
| title | Harmonized chronologies of a global late Quaternary pollen dataset (LegacyAge 1.0) |
| title_full | Harmonized chronologies of a global late Quaternary pollen dataset (LegacyAge 1.0) |
| title_fullStr | Harmonized chronologies of a global late Quaternary pollen dataset (LegacyAge 1.0) |
| title_full_unstemmed | Harmonized chronologies of a global late Quaternary pollen dataset (LegacyAge 1.0) |
| title_short | Harmonized chronologies of a global late Quaternary pollen dataset (LegacyAge 1.0) |
| title_sort | harmonized chronologies of a global late quaternary pollen dataset legacyage 1 0 |
| url | https://essd.copernicus.org/articles/14/1331/2022/essd-14-1331-2022.pdf |
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