Have you ever heard that we can “weigh” water on Earth from space? Since 2002, the GRACE and GRACE-FO satellite missions have been mapping month-to-month variations of the Earth’s gravity field. Because gravity responds to mass, these data can reveal how water is redistributed at the surface and in the subsurface. The result is a global time series of terrestrial water storage anomalies (TWSA)—h ...[Read More]
Comparing Apples to Apples: Filtering Water Storage Compartments for GRACE
Figure 1. Don’t subtract a sharp map from a blurry one. The apple inside the lens represents information smoothed to GRACE’s coarse spatial scale, while the orange represents an unfiltered, higher-resolution product.