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By NASA
2 min read
Hurricane Helene’s Gravity Waves Revealed by NASA’s AWE
On Sept. 26, 2024, Hurricane Helene slammed into the Gulf Coast of Florida, inducing storm surges and widespread impacts on communities in its path. At the same time, NASA’s Atmospheric Waves Experiment, or AWE, recorded enormous swells in the atmosphere that the hurricane produced roughly 55 miles above the ground. Such information helps us better understand how terrestrial weather can affect space weather, part of the research NASA does to understand how our space environment can disrupt satellites, communication signals, and other technology.
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As the International Space Station traveled over the southeastern United States on Sept. 26, 2024, AWE observed atmospheric gravity waves generated by Hurricane Helene as the storm slammed into the gulf coast of Florida. The curved bands extending to the northwest of Florida, artificially colored red, yellow, and blue, show changes in brightness (or radiance) in a wavelength of infrared light produced by airglow in Earth’s mesosphere. The small black circles on the continent mark the locations of cities. To download this video or other versions with alternate color schemes, visit this page. Utah State University These massive ripples through the upper atmosphere, known as atmospheric gravity waves, appear in AWE’s images as concentric bands (artificially colored here in red, yellow, and blue) extending away from northern Florida.
“Like rings of water spreading from a drop in a pond, circular waves from Helene are seen billowing westward from Florida’s northwest coast,” said Ludger Scherliess, who is the AWE principal investigator at Utah State University in Logan.
Launched in November 2023 and mounted on the outside of the International Space Station, the AWE instrument looks down at Earth, scanning for atmospheric gravity waves, ripple-like patterns in the air generated by atmospheric disturbances such as violent thunderstorms, tornadoes, tsunamis, wind bursts over mountain ranges, and hurricanes. It does this by looking for brightness fluctuations in colorful bands of light called airglow in Earth’s mesosphere. AWE’s study of these gravity waves created by terrestrial weather helps NASA pinpoint how they affect space weather.
These views of gravity waves from Hurricane Helene are among the first publicly released images from AWE, confirming that the instrument has the sensitivity to reveal the impacts hurricanes have on Earth’s upper atmosphere.
By Vanessa Thomas
NASA’s Goddard Space Flight Center, Greenbelt, Md.
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By NASA
NASA canvases the areas impacted by Hurricane Milton using cloud-penetrating L-band radar providing responders insight into flooding across Florida.NASA In the wake of Hurricane Milton, NASA is deploying resources to support Federal Emergency Management Agency (FEMA) and state emergency management agencies to aid their response effort including satellite and aerial data collection.
The agency’s Disasters Response Coordination System and Airborne Science Program are began conducting flights Friday to provide emergency responders with better insight into flooding, damage in Florida, and debris.
“After the devastating impact from hurricanes Helene and Milton, NASA immediately sprang into action,” said Karen St. Germain, director, Earth Sciences Division at NASA Headquarters in Washington. “Whether it is through observations from space or from airplanes, NASA is ready to assist communities affected by severe storms. We are working together with our federal and state partners to provide a better understanding of what is happening on the ground, in real time. NASA’s Disasters Response Coordination System was designed with the goal of delivering trusted, actionable Earth science information, where and when people need it, to enable effective response when these events strike.”
NASA’s Uninhabited Aerial Synthetic Aperture Radar Vehicle (UAVSAR) instrument is gathering rapid wide area L-Band synthetic aperture radar data shared directly with FEMA and other organizations. Flights are coordinated directly with FEMA to augment their existing satellite and aerial data collection.
Since Hurricane Milton struck, persistent cloud cover over the State of Florida has made it challenging to obtain optical satellite observations of conditions in the region. Synthetic aperture radar instruments, such as those aboard UAVSAR, can see through the clouds to observe changes on the ground. This provides much-needed observations of flood inundation across communities in Florida, as well as the extent of inland river flooding and resource deployment.
The Disaster Response Coordination System has been working closely with FEMA and state emergency management agencies to aid response efforts as Hurricane Milton approached and impacted Florida. The team is actively sharing resources with other agency partners, the state of Florida, and disaster response non-profit organizations.
NASA continues to determine the needs of its partners and is sharing maps and data on the NASA Disasters Mapping Portal as they become available.
Hurricane Milton caused significant wind, flooding, power outages, and damage across central Florida, from Sarasota and Tampa to Palm Springs and the Space Coast. Impacts are currently being assessed alongside lifesaving operations and emergency repairs. The Disasters Response Coordination System is collaborating directly with FEMA, the State of Florida Geospatial Information Office, U.S. Geological Survey, NOAA (National Oceanic and Atmospheric Administration), and the American Red Cross. The Disasters Response Coordination System is also sharing any available Earth observation data with NASA’s Kennedy Space Center emergency managers to support their damage assessment process.
By using tools like NASA’s Black Marble, and updating daily with differential analysis done to highlight areas with extended power outages, the agency provides FEMA, states, and non-profits the opportunity to distribute temporary generators, life-sustaining resources, and damage assessments.
The UAVSAR flights are being conducted with support from NASA’s Disasters Program, NASA’s Earth Action Program, and NASA’s Research and Analysis Program, and are being managed by NASA’s Armstrong Flight Research Center in Edwards, California, a NASA’s Jet Propulsion Laboratory in Southern and California, and the California Institute of Technology.
To learn more about NASA’s Disaster Response Coordination System, visit:
https://disastersresponsecoordinationsystem.gov
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