A dataset of Terrestrial Water Storage Anomaly based on ITSG-Grace2018

After the GRACE gravity satellite was launched, it made up for the shortcomings of hydrological observations that were easily restricted by observation conditions, uneven spatial distribution of sites and poor data quality. And it can directly obtain terrestrial water storage anomaly (TWSA) at different spatial scales. The ITSG-Grace2018 is the latest release of time-variable gravity field models at Graz University of Technology. In this study, we used ITSG-Grace2018 to calculate TWSA in Amazon basin. The TWSA dataset from January to December 2009 are achieved in hdf5 format with the date every 5 days in the file name. The spatial resolution of the data is 1°×1°.

重力恢复与气候实验（Gravity Recovery and Climate Experiment，GRACE）卫星发射后，有效弥补了传统水文观测易受观测条件限制、观测站点空间分布不均且数据质量欠佳的短板。该卫星可直接获取不同空间尺度下的陆地水储量异常（Terrestrial Water Storage Anomaly，TWSA）。ITSG-Grace2018是格拉茨工业大学（Graz University of Technology）发布的最新时变重力场模型产品。本研究采用ITSG-Grace2018模型计算亚马逊流域的陆地水储量异常。本数据集涵盖2009年1月至12月的陆地水储量异常数据，采用HDF5格式存储，文件名中包含每5天一次的日期信息。该数据的空间分辨率为1°×1°。