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radar & radio

Four bolts of lightning strike the ground simultaneously against a purple sky.
Posted inResearch Spotlights

Scientists Can Now Map Lightning in 3D

by Morgan Rehnberg 15 February 202315 February 2023

A new approach enables meter-scale localization of lightning strikes. And it’s already illuminating the basic physics of the phenomenon.

Satellite view of an ice shelf and sea ice
Posted inResearch Spotlights

A Close Look at Melting Below Antarctica’s Largest Ice Shelf

by Rachel Fritts 28 October 202228 October 2022

Radar data reveal where, when, and how fast the base of the Filchner-Ronne Ice Shelf has been losing mass in recent years.

Mist permeates a lush rain forest in Tanzania
Posted inNews

Monitoring Moisture from Afar

by Danielle Beurteaux 12 October 202212 October 2022

Undisturbed tropical rain forests are experiencing more frequent droughts, but the ecosystems are isolated and difficult to assess. Scientists are using remote sensing to expand the depth and scope of monitoring efforts.

A tall jet of lightning extends upward from a bright thundercloud in front of a dark starry sky. The gigantic jet is bright white at the base and then transitions to blue and then to red as it reaches upward. The top of the jet is wider than the base.
Posted inNews

Gigantic Jet of Lightning Mapped over Oklahoma

by Kimberly M. S. Cartier 7 September 20227 September 2022

The most powerful gigantic jet ever recorded fortuitously appeared over a sensor array in Oklahoma, enabling scientists to map the structure of the phenomenon for the first time.

Four radar reflectivity diagrams.
Posted inEditors' Highlights

Advanced Real-Time Prediction of Storms With 30-Second Refresh

by Jiwen Fan 19 August 202228 September 2022

A new-generation weather radar and a massive supercomputing system enables forecasts of storms refreshed every 30 seconds, a significant development in severe weather prediction.

Photo of S-band radar site with Mt. Aragats in the background.
Posted inEditors' Highlights

Radar Diagnosis of the Thundercloud Electron Accelerator

by Minghua Zhang 14 June 202210 March 2023

Altitude-resolved S-band radar observations of graupel are used to decipher thunderstorm ground enhancements in surface electric field and gamma ray flux.

A team of researchers stands in front of an airplane in Antarctica.
Posted inNews

Newly Discovered Lake May Offer a Glimpse into Antarctica’s Past

by Andrew J. Wight 9 June 20229 June 2022

Scientists dive in—metaphorically—to Lake Snow Eagle, only recently revealed through ice-penetrating radar.

Figure 2 from the paper, showing a time series graph of amateur radio observations over the Continental United States and four maps showing data at selected universal times.
Posted inEditors' Highlights

Amateur Radio Observations Help Monitor Space Weather

by Gang Lu 17 May 20227 September 2022

Amateur radio observations provide a new method for studying large-scale ionospheric disturbances and HF communication impacts, and are important applications in ionospheric space weather monitoring.

A wall of ice looms over an expanse of rocks.
Posted inNews

Impact Structure Hidden Under Arctic Ice Dates to the Paleocene

by Katherine Kornei 13 April 202213 April 2022

Greenland’s Hiawatha impact structure, more than 30 kilometers in diameter, is much older than previously thought, new results suggest.

Plot showing how the height of melting layer is higher than that of the freezing level in cyclones.
Posted inEditors' Highlights

Melting Layer Characteristics of Cyclones

by Jonathan H. Jiang 22 March 202213 March 2023

Dual‐frequency Precipitation Radar observations reveal the characteristics and microphysical processes of the melting layer in cyclone precipitation over the western North Pacific.

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