The maps have a resolution of 1/8th degree of latitude, or about 8.5 miles (13.7 kilometers), providing continuous data on moisture and groundwater conditions across the landscape. A clearer picture of groundwater around the world could become an important tool in managing water security as the global population continues to grow and climate change makes for hotter and drier landscapes. NASA Responds to California’s Evolving Drought. The Drought Center also distributes soil moisture maps that show moisture changes in the root zone down to about 3 feet (1 meter) below the surface, as well as surface soil moisture maps that show changes within the top inch (2 cm) of the land. jane.j.lee@jpl.nasa.gov In mid-September 2015, water stored near the surface and underground in the U.S. West was far-below-normal. However, some other odd juxtapositions appear. NASA developed the new tool together with researchers from the University of Nebraska-Lincoln, with the team drawing on data from the Gravity Recovery and Climate Experiment Follow On (GRACE-FO) satellites. The maps are an experimental product used by the U.S. Drought Monitor and supported by NASA’s Goddard Space Flight Center. These maps are distributed online by the National Drought Mitigation Center at the University of Nebraska-Lincoln (UNL) to support U.S. and global drought monitoring. The wetness, or water content, is a depiction of the amount of groundwater on July 7, 2014, compared to the average from 1948 to 2009. But when there’s a drought in central Africa, for example, it may not be noticed until it causes a humanitarian crisis. “Being able to see a weekly snapshot of both soil moisture and groundwater is important to get a complete picture of drought,” said professor Brian Wardlow, director for the Center for Advanced Land Management Information Technologies at UNL, who works closely with Rodell on developing remote sensing tools for operational drought monitoring. Drought Written by Ellen Gray Published online on July 24, 2014, the study is the first to quantify the amount that groundwater contributes to the water needs of the western United States. While maps of current dry/wet conditions for the United States have been available since 2012, this is the first time they have been available globally. About 5 percent of the irrigated farmland has been taken out of production. The failure of the summer monsoon and other moisture carrying systems has parched more than 90 percent of some states. The latest groundwater map, released on Nov. 29, shows large patches of maroon over eastern Texas, indicating severely depressed groundwater levels. Temperature Extremes, small changes in Earth’s mass and its gravity field. Accessed April 5, 2020. According to the U.S. Bureau of Reclamation, the Colorado River basin is now in the driest 14-year period in the past hundred years. While maps of current dry/wet conditions for the United States have been available since 2012, this is the first timethey have been available globally. The GRACE and GRACE-FO satellite-based maps are among the essential datasets used by the authors of the U.S. Drought Monitor, the premier weekly map of drought conditions for the United States that is used by the U.S. Department of Agriculture and the Federal Emergency Management Agency, among others, to evaluate which areas may need financial assistance due to losses from drought. Image of the Day Image of the Day Automated harvesting with robots in the forest, Aerial tree planting systems being showcased, 5 mobile technology trends in the forestry industry, How Drones Are Being Used in Australia to Make Farming More Efficient, 13 GIS data collection apps professionals should try, Drones to plant hundreds of trees in minutes, Using LiDAR in forest inventory – free new guides, Comparing Lidar & Photogrammetric Point Clouds. But ground-based observations are too sparse to capture the full picture of wetness and dryness across the landscape like the combination of satellites and models can. The video below offers an overview of the new global groundwater maps. Accessed April 5, 2020. NASA's Jet Propulsion Laboratory manages the mission for the agency's Science Mission Directorate at NASA Headquarters in Washington. It also sustains streams during dry periods and is a useful indicator of extended drought. › View the maps → The Pacific Northwest states of Oregon and Washington are suffering through raging wildfires, as months of hot weather have dried out forests. It's going to drop quite a bit, people's wells could dry out, and it takes time to recover." NASA collaborated with researchers from Lincoln University to create the global groundwater map. Artist concept of GRACE. “Droughts are usually well known when they happen in developed nations. NASA’s twin Gravity Recovery and Climate Experiment (GRACE) satellites can detect groundwater by measuring subtle variations in Earth’s gravity. GRACE data goes back to 2002. NASA has mapped the groundwater of the Earth to solve these problems. At the surface, soil moisture changes rapidly with weather conditions.

Would love your thoughts, please comment. (Credit: NASA/National Drought Mitigation Center)› Larger image The researchers found that including the GRACE-FO data made the resulting soil moisture and groundwater forecasts more accurate.

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