Project Grant 2235299

Award Date 2/1/23
Completion Date 1/31/26
Dollars Obligated $810K
Federal Grant Program
47.050
Assistance Type
Project Grant
Place of Performance
Santa Cruz, CA 95064, USA
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The award will support research to better understand the conditions under which terrestrial gamma-ray flashes (TGFs) are produced during lightning storms. Radiation sensors will be deployed globally, including at high- and low-altitude sites with strong summer and winter lightning activity. By comparing TGF detections to radio wave data indicating lightning type, the project aims to determine when TGFs are most likely and provide insight into production mechanisms. A new digital dosimeter will also quantify radiation doses from very close TGFs. Analyses will search for systematic differences in TGF and lightning characteristics to clarify production mechanisms for downward TGFs associated with different lightning types. The research strengthens understanding of integrated Earth system processes through atmospheric and geospace sciences as supported by the NSF program.

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