Monthly 0.5°groundwater storage change in Africa from 2003 to 2020 (GWS-AF05_2003-2020)

Dataset Overview

The monitoring objective of this data product is the groundwater storage change, which refers to the monthly anomaly relative to the 2003–2020 mean and is expressed in equivalent water height (unit: mm). The data used are spherical harmonic coefficients from GRACE (Gravity Recovery and Climate Experiment), GRACE Follow-On and model simulations from CLSM (Community Land Surface Model) v2.2. The data were produced using the coordinated forward modeling (CoFM) method, which uses model simulations to constrain the GRACE mass change signal to reduce bias and leakage errors at grid scale. These errors were then corrected by the CoFM through iteratively updating the aquifer storage coefficients, which were finally used together with the simulated groundwater levels to estimate the monthly groundwater storage change at a 0.5°grid scale.

Dataset Details

Spatial Resolution: 0.5°

Time Resolution: monthly

Product Number: XDA19090120_032

Create Institution: International Research Center of Big Data for Sustainable Development Goals

Created By: Yun Pan

Creation Date: 2023-03-22T05:41:16.798Z

File Size: 1

Data Format: GeoTiff

Type Of Data: grid

Data Label:

Naming Convention

This product uses the WGS84 geographic coordinate system and longitude and latitude projection (EPSG: 4326). Data are stored in GeoTIFF format. The spatial resolution is 0.5° . There are 215 files in total, each file containing groundwater storage change for each month. The unit is mm/month.

Paper Citation

Yun Pan, Chong Zhang, Huili Gong, et al. 2017, Detection of human-induced evapotranspiration using gravity satellite observations in the Haihe River Basin of China. Geophysical Research Letters, 44(1): 190-199.

Data Citation

Yun Pan. Monthly 0.5° groundwater storage change in Africa (GWS-AF05_2003-2020), Beijing: International Research Center of Big Data for
Sustainable Development Goals (CBAS), 2023. doi: 10.12237/casearth.640f0104819aec3f2b52a4a8

Data Licence Agreement

Users of this data product shall clearly indicate the source and the authors of "Monthly 0.5° groundwater storage change in Africa" in all forms of their research output (including, but not limited to, published and unpublished papers/reports, theses, monographs, data products, and other academic output) generated by using this data product, and shall cite the corresponding references. The data producers shall not be liable for any loss arising from the use of this data product. The boundaries and masks used in the maps do not represent an official opinion or endorsement by the data producers.