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Filters Date Range Past year (0) Past month (0) Past week (0) Past day (0) Custom range... To   Search Extensions Project (2) Contacts John Wesley Powell Center for Earth System Analysis and Synthesis Wesley O Zell Claudia C Faunt Bridget Scanlon Meredith D Reitz More... Tags (with Type=Keywords ) satellite (2) global (1) grace (1) groundwater (1) groundwater storage (1) volcano (1) View Results as: JSON ATOM CSV

Integrating GRACE Satellite and Ground-based Estimates of Groundwater Storage Changes Groundwater storage depletion is a critical issue for many of the major aquifers in the U.S., particularly during intense droughts. The GRACE (Gravity Recovery and Climate Experiment) satellites launched in 2002, with sensors designed to measure changes in the Earth’s gravitational field at large spatial scales (≥ ~200,000 km2). These changes are primarily driven by changes in water storage on the Earth’s surface. Estimates of groundwater storage changes based on these gravity measurements have attracted considerable media attention in the U.S. and globally. However, groundwater storage changes are computed indirectly by subtracting snow, surface water, and soil moisture storage from the total water storage monitored... Categories: Project; Tags: Active, All Working Groups, GRACE, Groundwater, Groundwater Storage, All tags... Satellite, Water Resources, Fewer tags Optimizing satellite resources for the global assessment and mitigation of volcanic hazards A vast number of the world’s volcanoes are unmonitored by ground-based sensors, yet constitute an important hazard to nearby residents and infrastructure, as well as air travel and the global economy. Satellite data provide a cost-effective means of tracking activity at such volcanoes. Unfortunately, satellite acquisitions are not optimized for application to volcano hazards, in part because clear relations between satellite-monitored unrest and eruptive activity are lacking. We aim to bridge this gap by developing linked global databases of satellite observations of volcanic activity, with the goal of relating surface change and volcanic emissions to eruption style and impact. This database (or databases) will... Categories: Project; Tags: Active, All Working Groups, All Working Groups, Global, Natural Hazards, All tags... Satellite, Volcano, Fewer tags