Seung Hwan Lee

Why is the GRACE satellite used?

GRACE (Gravity Recovery and Climate Experiment) is a satellite system where twin satellites travel side by side, measuring minute distance changes caused by gravitational anomalies on the Earth's surface to analyze water storage variations. This satellite is utilized for large-scale hydrological research and is useful for monitoring water resource changes due to climate change and human activities. With the introduction of GRACE, various research has been actively conducted including drought and flood prediction, groundwater depletion prevention, and sea level variation analysis. However, GRACE has limitations for small-scale regional studies due to its low spatial resolution of approximately 3° (about 330km). To complement this issue, Our team tries to develop downscaling techniques using statistical methods by combining various numerical modeling data.