Data underlying the publication: Water footprints and crop water use of 175 individual crops for 1990–2019 simulated with a global crop model

<strong>Overview</strong>Here we provide outputs of the global simulation of water footprints of crops with a process-based gridded crop model ACEA (see model description in the references). The model is based on FAO’s AquaCrop and covers 175 widely-grown crops in the 1990–2019 period at a 5 arcminute resolution (10 x 10 km). We partition water footprints into green (water from precipitation) and blue (from irrigation or capillary rise) and differentiate between rainfed and irrigated production systems. The outputs cover several variables, including unit water footprints (expressed in m³ t^-1 yr^-1), water footprints of crop production (m³ yr^-1), and crop water use (mm yr^-1). For more information on methods, input data, validation, and uncertainties, please refer to the corresponding data descriptor paper published in Nature Scientific Data: doi.org/10.1038/s41597-024-03051-3<br>This dataset includes global gridded datasets (NetCDF4 files) and summary datasheets for national and global values (CSV files). For more information on each provided file, please refer to <em>readme.pdf</em><br><strong>Citation</strong>To cite the dataset, please refer to doi.org/10.1038/s41597-024-03051-3<br><strong>Version History</strong>2025-05-16 (v3): new files added to provide <strong>global gridded datasets for all individual crops &amp; years</strong>: &gt;<em> unit_wf_175_crops_annual_1990_2019.zip </em>– unit water footprints per crop in 1990–2019 for all combinations of production systems (rainfed, irrigated, total) with water types (green, blue, total) &gt;<em> cwu_175_crops_annual_1990_2019.zip </em>– same but for crop water use &gt;<em> harvested_area_175_crops_annual_1990_2019.zip </em>– rainfed, irrigated, and total harvested areas per crop in 1990–2019 &gt;<em> production_175_crops_annual_1990_2019.zip </em>– same but for crop production &gt;<em> classification_of_175_crops.csv </em>– crop classification for user convenience, based on FAOSTAT<br>2024-02-28 (v2): new files added to provide <strong>representative data for the current state of water footprints</strong>: &gt;<em> global_wf_175_crops_average_2010_2019.csv </em>– global average values per crop over 2010–2019 &gt;<em> national_wf_175_crops_average_2010_2019.csv </em>– same but for individual countries <br>2023-08-16 (v1): dataset uploaded for the first time (as described in the data descriptor paper)

**数据集概述**
本数据集提供基于过程的栅格作物模型ACEA（详细模型说明参见参考文献）所完成的全球作物水足迹模拟结果。该模型基于联合国粮食及农业组织（Food and Agriculture Organization, FAO）的AquaCrop模型构建，覆盖1990–2019年间全球175种广泛种植的作物，空间分辨率为5弧分（约10×10公里）。本研究将作物水足迹划分为绿水（来源于降水）与蓝水（来源于灌溉或毛管上升水）两类，并区分了雨养与灌溉两种生产系统。
模拟结果包含多项变量，包括单位作物水足迹（单位：立方米每吨每年，m³ t⁻¹ yr⁻¹）、作物生产总水足迹（单位：立方米每年，m³ yr⁻¹）以及作物用水量（单位：毫米每年，mm yr⁻¹）。若需了解方法、输入数据、验证及不确定性分析的详细信息，请参阅发表于《Nature·科学数据》的对应数据描述论文：doi.org/10.1038/s41597-024-03051-3

本数据集包含全球栅格数据集（NetCDF4格式文件）以及用于展示国家与全球尺度汇总值的统计表（CSV格式文件）。各文件的详细说明请参阅readme.pdf文档。

**引用方式**
本数据集的引用格式请参见：doi.org/10.1038/s41597-024-03051-3

**版本更新历史**
2025-05-16（v3）：新增文件以提供**所有单作物及逐年的全球栅格数据集**：
- unit_wf_175_crops_annual_1990_2019.zip：包含1990–2019年间所有生产系统（雨养、灌溉、总计）与水类型（绿水、蓝水、总计）组合下的单作物单位水足迹
- cwu_175_crops_annual_1990_2019.zip：同上，对应作物用水量数据
- harvested_area_175_crops_annual_1990_2019.zip：包含1990–2019年间各作物的雨养、灌溉及总收获面积
- production_175_crops_annual_1990_2019.zip：同上，对应作物产量数据
- classification_of_175_crops.csv：基于FAOSTAT的作物分类表，方便用户使用

2024-02-28（v2）：新增文件以提供**当前作物水足迹现状的代表性数据**：
- global_wf_175_crops_average_2010_2019.csv：包含2010–2019年间各作物的全球平均水足迹
- national_wf_175_crops_average_2010_2019.csv：同上，对应分国家的平均水足迹

2023-08-16（v1）：首次上传本数据集（与数据描述论文中的说明一致）