LegacyPollen2.0: Taxonomically harmonized pollen percentages of Asian samples with revised chronologies

This data set consists of the taxonomically harmonized and temporally standardized fossil pollen data from 3680 records. 1122 records are located in North America, 1446 records in Europe, 687 records in Asia, 185 records in South America, 159 in Africa and 81 in the Indo-Pacific region. We expanded the previous version of the LegacyPollen 1.0 data set (Herzschuh et al., 2022; https://doi.org/10.5194/essd-14-3213-2022) with records from the Neotoma Paleoecology Database (https://www.neotomadb.org/; last access: August 31, 2022), ACER 1.0 database (Sánchez Goñi et al., 2017; https://doi.org/10.1594/PANGAEA.870867), Chinese fossil pollen dataset (Zhou et al., 2023, https://www.plant-ecology.com/CN/Y2023/V47/I10/1453 [in Chinese]; Cao et al., 2022, https://doi.org/10.1111/gcb.16274), and our own collection for the Asian sector. Taxonomic harmonization (i.e., woody taxa and major herbaceous taxa have been harmonized to genus level and other herbaceous taxa to family level) and temporal standardization (i.e., re-estimation of age-depth models) follow the previously established frameworks LegacyPollen 1.0 (Herzschuh et al., 2022; https://doi.org/10.5194/essd-14-3213-2022) and LegacyAge 1.0 (Li et al., 2022; https://doi.org/10.5194/essd-14-1331-2022), respectively. In compiling the dataset, we also followed the practices recommended by Flantua et al. (2023; https://doi.org/10.1111/geb.13693) for large-scale paleoecological data synthesis, such as how to select data sources and filter the dataset.Compared to the LegacyPollen 1.0 dataset, we now include the Neotoma DOI (if Neotoma source) in the overview table of site metadata to eliminate the broken chain of static LegacyPollen 2.0 dataset with living (such as updating discovered metadata errors and chronologies) Neotoma and associated risk of data staleness. Furthermore, we also added the PANGAEA Event (PANGAEA dataset identifier) for each new record to ensure that our dataset meets PANGAEA's high standards for quality, usability, and compliance.

本数据集包含来自3680条记录的经分类学统一与时间标准化处理的化石花粉数据。其中1122条记录分布于北美洲，1446条位于欧洲，687条位于亚洲，185条位于南美洲，159条位于非洲，另有81条记录归属印太地区。本数据集在LegacyPollen 1.0数据集（LegacyPollen 1.0，Herzschuh等，2022；https://doi.org/10.5194/essd-14-3213-2022）的基础上，新增了来自以下数据源的记录：Neotoma古生态学数据库（Neotoma Paleoecology Database，https://www.neotomadb.org/；最后访问时间：2022年8月31日）、ACER 1.0数据库（ACER 1.0 database，Sánchez Goñi等，2017；https://doi.org/10.1594/PANGAEA.870867）、中国化石花粉数据集（Zhou等，2023，https://www.plant-ecology.com/CN/Y2023/V47/I10/1453 [中文]；Cao等，2022，https://doi.org/10.1111/gcb.16274），以及我们针对亚洲区域自行采集的记录。本次数据集的分类学统一（即将木本类群与主要草本类群统一至属级水平，其余草本类群统一至科级水平）与时间标准化流程（即重新估算年龄-深度模型），分别遵循LegacyPollen 1.0（LegacyPollen 1.0，Herzschuh等，2022；https://doi.org/10.5194/essd-14-3213-2022）与LegacyAge 1.0（LegacyAge 1.0，Li等，2022；https://doi.org/10.5194/essd-14-1331-2022）已确立的规范框架。在数据集汇编过程中，我们还遵循了Flantua等（2023；https://doi.org/10.1111/geb.13693）提出的大规模古生态学数据合成规范，涵盖数据源筛选与数据集过滤等相关方法。相较于LegacyPollen 1.0数据集，我们现已在站点元数据总表中纳入Neotoma数据源的DOI编号，以解决静态版LegacyPollen 2.0数据集与活跃更新的Neotoma数据库（例如更新已发现的元数据错误与年代序列）脱节的问题，同时降低数据过时的相关风险。此外，我们还为每条新增记录添加了PANGAEA事件号（PANGAEA数据集标识符），以确保本数据集符合PANGAEA在数据质量、可用性与合规性方面的高标准要求。

搜集汇总

背景与挑战

背景概述

LegacyPollen2.0是一个全球化石花粉数据集，包含来自3680个记录的标准化花粉百分比数据，其中亚洲样本占687个。该数据集是LegacyPollen 1.0的更新版本，通过整合多个数据源（如Neotoma和中国化石花粉数据集）并进行分类学和时间标准化处理，提高了数据的质量和一致性，适用于晚第四纪古气候和古生态学研究。