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Buoy‐Based Detection of Low‐Energy Cosmic‐Ray Neutrons to Monitor the Influence of Atmospheric, Geomagnetic, and Heliospheric Effects

Authors

Schrön,  Martin
External Organizations;

/persons/resource/drasche

Rasche,  Daniel
4.4 Hydrology, 4.0 Geosystems, Departments, GFZ Publication Database, Deutsches GeoForschungsZentrum;

Weimar,  Jannis
External Organizations;

Köhli,  Markus
External Organizations;

Herbst,  Konstantin
External Organizations;

Boehrer,  Bertram
External Organizations;

Hertle,  Lasse
External Organizations;

Kögler,  Simon
External Organizations;

Zacharias,  Steffen
External Organizations;

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Fulltext (public)

5026656.pdf
(Publisher version), 6MB

Supplementary Material (public)
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Citation

Schrön, M., Rasche, D., Weimar, J., Köhli, M., Herbst, K., Boehrer, B., Hertle, L., Kögler, S., Zacharias, S. (2024): Buoy‐Based Detection of Low‐Energy Cosmic‐Ray Neutrons to Monitor the Influence of Atmospheric, Geomagnetic, and Heliospheric Effects. - Earth and Space Science, 11, 6, e2023EA003483.
https://doi.org/10.1029/2023EA003483


Cite as: https://gfzpublic.gfz-potsdam.de/pubman/item/item_5026656
Abstract
Cosmic radiation near the Earth's surface is influenced by solar activity, atmospheric conditions, and changes of nearby soil moisture or snow. To better understand how cosmic‐ray neutron measurements should be corrected for meteorological effects, we operated a detector for low‐energy neutrons in a buoy on a lake in Germany for 5 months in 2014. Since the water content in the surroundings is constant, we were able to isolate the signal from almost any ground‐related disturbances. With this instrument, we challenged traditional and recent theories on the neutron response to water, air humidity, and to reference data from high‐energy neutron monitors around the world. We found that in some cases, recent theories showed superior performance over traditional approaches. We also found a stronger response of the neutrons detected by the buoy to a major solar event than was observed by traditional neutron monitors. The concept of a neutron detector on a lake could be useful as a reference station for similar land‐side detectors and help provide more reliable soil moisture products.