The SUMup collaborative database: Surface mass balance, subsurface temperature and density measurements from the Greenland and Antarctic ice sheets (2024 release)

The SUMup database is a compilation of surface mass balance (SMB), subsurface temperature and density measurements from the Greenland and Antarctic ice sheets. This 2024 release contains 7 483 826 data points: 2 857 256 SMB measurements, 2 727 162 density measurements and 1 899 408 subsurface temperature measurements. This is respectively 1 078 716, 20 749 and 1 893 938 additional observations of SMB, density and temperature compared to the 2023 release. Since 2023, SUMup provides not only snow accumulation on ice sheets, like its predecessors, but all types of SMB measurements, including from ablation areas. The data files are provided in both CSV and NetCDF format and contain, for each measurement, the following metadata: latitude, longitude, elevation, timestamp, method, reference of the data source and, when applicable, the name of the measurement group it belongs to (core name for SMB, profile name for density, station name for temperature). Data users are encouraged to cite all the original data sources that are being used. Issues about this release as well as suggestions of datasets to be added in next releases can be done on a dedicated user forum: https://github.com/SUMup-database/SUMup-data-suggestion/issues. Example scripts to use the SUMup 2024 files are made available on our script repository: https://github.com/SUMup-database/SUMup-example-scripts.SUMup数据库是一套汇集格陵兰与南极冰盖地表物质平衡（surface mass balance，SMB）、地下温度及密度实测数据的汇编库。本次2024版共收录7483826条数据：其中地表物质平衡观测2857256条、密度观测2727162条、地下温度观测1899408条。相较于2023版，本次新增的地表物质平衡、密度及温度观测分别为1078716条、20749条及1893938条。 自2023版起，SUMup不仅如前代版本般仅收录冰盖积雪积累量，更覆盖所有类型的地表物质平衡观测，包括消融区相关数据。 数据文件以CSV及NetCDF两种格式提供，每条观测均附带如下元数据：纬度、经度、高程、时间戳、观测方法、数据来源参考文献，以及（若适用）所属观测组名称（地表物质平衡数据对应核心名称、密度数据对应剖面名称、温度数据对应测站名称）。 倡议数据使用者引用所有实际使用的原始数据来源。 针对本版本的相关问题以及下一版本拟新增数据集的建议，可通过专属用户论坛提交：https://github.com/SUMup-database/SUMup-data-suggestion/issues。 SUMup 2024数据集的使用示例脚本已在脚本仓库公开：https://github.com/SUMup-database/SUMup-example-scripts。