Geodesy for Climate Actions

An increasingly warmer Earth have been and will in the future adversely and significantly impact humankind and their socioeconomic well-beings, especially in world’s coastal regions and in the most densely populated areas which are experiencing rapid urbanization. Climate-induced hazards, including but not limited to rapid sea-level rise, intensified cyclone/storm surges, prolonged floods/droughts, extreme heat/precipitations, wildfires, severe natural/anthropogenic land subsidence, and depletion of freshwater resources, collectively further exacerbate risks to Earth’s inhabitants. Geodesy and the associated Essential Climate Variables (ECVs) are postulated to be critical to enable accurate and timely monitoring of these hazards with the goal to achieve<br/>effective climate actions. Here, we present current achievements using contemporary satellite geodetic observations, including but not limited to satellite gravimetry/altimetry, InSAR, GNSS, signals of opportunities, processed using physics-guided deep-learning analytics and demonstrating adequate spatiotemporal resolutions-downscaling, towards enabling timely climate-induced hazards monitoring and effective climate actions.