Doppler radar imaging is a remote sensing method that combines conventional radar reflectivity measurements with Doppler-shifted phase or frequency information to retrieve both spatial structure and line-of-sight velocity of targets, typically hydrometeors or atmospheric scatterers. By transmitting coherent microwave pulses and analyzing phase changes between successive returns, it quantifies radial velocities and turbulence, enabling derivation of wind fields, storm dynamics, and microphysical processes. Advanced implementations, such as pulse-pair processing and dual-polarization Doppler techniques, enhance sensitivity to motion, particle type, and size distributions, supporting quantitative precipitation estimation, severe weather diagnosis, and assimilation of high-resolution kinematic data into numerical weather prediction models.
Tornadoes are among the most destructive weather phenomena on Earth. Their small scale, short life cycle and sudden onset make them extremely difficult to predict. This challenge is amplified for weak tornadoes embedded within ...
Environment
5 hours ago
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Landslides in Alaska. Air quality in Atlanta. Fire clouds out West. From the Arctic fringes to farm country, NASA's newest class of suborbital Earth Venture missions is gearing up to deliver science that will benefit communities ...
Planetary Sciences
Jul 21, 2026
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Cameras that photograph insects overnight and AI that identifies them are among a new generation of tools that could finally allow scientists to track whether the world's plan to save nature is working for its most overlooked ...
Plants & Animals
Mar 18, 2026
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When people think about habitats on Earth, they likely picture forests, oceans or grasslands. Few think to look up. Yet the lower atmosphere, or troposphere, may be the largest habitat on the planet. A new study published ...
Ecology
Jan 15, 2026
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Although millions upon millions of living creatures fly, feed and reproduce in the air, this habitat has hardly been researched. Insects are under increasing pressure worldwide due to global change and human activities. However, ...
Plants & Animals
Dec 8, 2025
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A research team including a Keele University scientist have made a breakthrough in monitoring insect populations across the UK using weather radar data. Traditionally used to track rainfall and storms, these radars are now ...
Plants & Animals
Oct 27, 2025
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After nearly 25 years of research, the mystery has finally been solved: Europe's largest bat doesn't just eat small birds—it hunts and captures them more than a kilometer above the ground. And it eats them without landing.
Plants & Animals
Oct 9, 2025
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As the Colorado River's giant reservoirs have declined during the last two decades, even larger amounts of water have been pumped and drained from underground, according to new research based on data from NASA satellites.
Earth Sciences
May 28, 2025
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