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  The Implications of Temporal Variability in Wave‐Particle Interactions in Earth's Radiation Belts

Watt, C. E. J., Allison, H. J., Thompson, R. L., Bentley, S. N., Meredith, N. P., Glauert, S. A., Horne, R. B., Rae, I. J. (2021): The Implications of Temporal Variability in Wave‐Particle Interactions in Earth's Radiation Belts. - Geophysical Research Letters, 48, 1, e2020GL089962.
https://doi.org/10.1029/2020GL089962

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Watt, C. E. J.1, Autor
Allison, Hayley J.2, Autor              
Thompson, R. L.1, Autor
Bentley, S. N.1, Autor
Meredith, N. P.1, Autor
Glauert, S. A.1, Autor
Horne, R. B.1, Autor
Rae, I. J.1, Autor
Affiliations:
1External Organizations, ou_persistent22              
22.7 Space Physics and Space Weather, 2.0 Geophysics, Departments, GFZ Publication Database, Deutsches GeoForschungsZentrum, ou_2239888              

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 Zusammenfassung: Changes in electron flux in Earth's outer radiation belt can be modeled using a diffusion‐based framework. Diffusion coefficients D for such models are often constructed from statistical averages of observed inputs. Here, we use stochastic parameterization to investigate the consequences of temporal variability in D. Variability time scales are constrained using Van Allen Probe observations. Results from stochastic parameterization experiments are compared with experiments using D constructed from averaged inputs and an average of observation‐specific D. We find that the evolution and final state of the numerical experiment depends upon the variability time scale of D; experiments with longer variability time scales differ from those with shorter time scales, even when the time‐integrated diffusion is the same. Short variability time scale experiments converge with solutions obtained using an averaged observation‐specific D, and both exhibit greater diffusion than experiments using the averaged‐input D. These experiments reveal the importance of temporal variability in radiation belt diffusion.

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Sprache(n): eng - Englisch
 Datum: 2021-01-092021
 Publikationsstatus: Final veröffentlicht
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 Identifikatoren: DOI: 10.1029/2020GL089962
GFZPOF: p4 T3 Restless Earth
OATYPE: Hybrid Open Access
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Titel: Geophysical Research Letters
Genre der Quelle: Zeitschrift, SCI, Scopus, ab 2023 oa
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Seiten: - Band / Heft: 48 (1) Artikelnummer: e2020GL089962 Start- / Endseite: - Identifikator: ISSN: 1944-8007
ISSN: 0094-8276
CoNE: https://gfzpublic.gfz-potsdam.de/cone/journals/resource/journals182
Publisher: American Geophysical Union (AGU)