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数据库是一套收录格陵兰与南极冰盖地表质量平衡（surface mass balance, SMB）、地下温度及密度观测数据的汇编数据集。本次2024版共包含7483826条数据点：其中地表质量平衡观测2857256条、密度观测2727162条、地下温度观测1899408条。相较于2023版，本次更新分别新增了1078716条地表质量平衡、20749条密度以及1893938条温度观测数据。自2023版起，SUMup不再局限于前代版本仅收录冰盖积雪积累量数据的范畴，而是涵盖了各类地表质量平衡观测数据，包括消融区相关观测。数据文件以CSV和NetCDF两种格式提供，每条观测均附带如下元数据：纬度、经度、海拔、时间戳、观测方法、数据源参考文献，以及（如适用的）所属观测组名称——其中地表质量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。我们鼓励数据使用者引用所使用的全部原始数据源。关于本次版本的相关问题，以及下一版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。针对SUMup 2024数据文件的示例脚本已在我们的脚本仓库发布：https://github.com/SUMup-database/SUMup-example-scripts。