Validation of New Chorus Wave Model derived from Van Allen Probe Wave Observations using VERB-3D code and Particle Measurements

Wang, Dedong

Validation of New Chorus Wave Model derived from Van Allen Probe Wave Observations using VERB-3D code and Particle Measurements

Tuesday, 6 March 2018

Lakehouse (Hotel Quinta da Marinha)

Dedong Wang¹, Yuri Shprits^2,3, Maria Spasojevic⁴, Hui Zhu⁵, Nikita Aseev⁶, Alexander Drozdov⁷, Adam C Kellerman⁷ and Juan Sebastian Cervantes Villa⁸, (1)Helmholtz Centre Potsdam GFZ German Research Center for Geosciences, 2.8 Magnetospheric Physics, Potsdam, Germany, (2)Helmholtz Centre Potsdam GFZ German Research Center for Geosciences, Potsdam, Germany, (3)University of Potsdam, Potsdam, Germany, (4)Stanford University, Stanford, CA, United States, (5)University of Texas at Dallas, Dallas, United States, (6)GFZ German Research Centre for Geosciences, Potsdam, Germany, (7)University of California Los Angeles, Los Angeles, CA, United States, (8)Deutsches GeoForschungsZentrum GFZ, 2.8 Magnetospheric Physics, Potsdam, Germany

Abstract:

In-situ satellite observations, theoretical studies and model simulations suggested that chorus waves play a significant role in the dynamic evolution of relativistic and energetic electrons in the Earth’s radiation belts. In this study, utilizing 4 years’ data from the Electric and Magnetic Field Instrument Suite and Integrated Science (EMFISIS) instrument onboard the Van Allen Probes, we developed new wave-frequency and amplitude models that depend on magnetic local time (MLT), L-shell, Kp and latitude for upper-band and lower-band chorus waves. Using the Full Diffusion Code (FDC), we calculated corresponding diffusion coefficients in each MLT sector (1 hour resolution) for upper-band and lower-band chorus waves according to the new-developed wave models. To investigate effects of obtained diffusion coefficients under different geomagnetic conditions, we performed simulations using the Versatile Electron Radiation Belt (VERB) code and validated the simulation results against observations.