Abstract:
Electromagnetic Ion Cyclotron (EMIC) wave are important for the losses of ultra-relativistic electrons from the Earth's radiation belts. In this work, statistical EMIC diffusion coefficients are calculated from Van Allen Probe A observations of EMIC waves from the entire mission. The diffusion coefficient calculations include the observed L* and activity dependent distributions in plasma density and wave spectra so that the wave-particle interactions modelled are representative of those in the radiation belts. These diffusion coefficients can be included into global radiation belt simulations such as the BAS radiation belt model. The study is published in Ross et al 2021, JGR: Space Physics.
Funding was provided by National Environment Research Council Highlight Topic grant NE/P01738X/1 (Rad-Sat), National Environment Research Council grant NE/R016445/1 and NE/R016038/1.
Keywords:
Electromagnetic Ion Cyclotron Waves, Radiation belts, Van Allen Probes, ultra-relativistic electrons
Ross, J., & Glauert, S. (2021). Electron Electromagnetic Ion Cyclotron diffusion coefficients calculated from Van Allen Probe observations (Version 1.0) [Data set]. NERC EDS UK Polar Data Centre. https://doi.org/10.5285/cc48c65d-5395-45a1-a60a-3a4b987fd673
| Use Constraints: | Data supplied under Open Government Licence v3.0 http://www.nationalarchives.gov.uk/doc/open-government-licence/version/3/. |
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| Creation Date: | 2021-11-02 |
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| Dataset Progress: | Planned |
| Dataset Language: | English |
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| Parameters: |
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| Personnel: | |
| Name | UK PDC |
| Role(s) | Metadata Author |
| Organisation | British Antarctic Survey |
| Name | Dr Johnathan P J Ross |
| Role(s) | Investigator, Technical Contact |
| Organisation | British Antarctic Survey |
| Name | Dr Sarah Glauert |
| Role(s) | Investigator |
| Organisation | British Antarctic Survey |
| Name | Prof Richard Horne |
| Role(s) | Investigator |
| Organisation | British Antarctic Survey |
| Name | Clare Watt |
| Role(s) | Investigator |
| Organisation | Dept. of Mathematics, Physics and Electronic Engineering, Northumbria University |
| Name | Dr Nigel Meredith |
| Role(s) | Investigator |
| Organisation | British Antarctic Survey |
| Parent Dataset: | N/A |
| Quality: | The magnetometer data using in the study are converted in to spectra following the procedure described in the accompanying paper. EMIC waves were identified in the resulting spectra using a visual identification and machine learning, the method excluded features that cannot reliably be identified as EMIC waves. | |
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| Lineage: | Data sources: * OMNIWeb (https://omniweb.gsfc.nasa.gov) for the geomagnetic and solar wind indices. * Van Allen Probes data the Level 3 and Level 4 EMFISIS magnetometer data obtained from http://emfisis.physics.uiowa.edu/data/index. |
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| Temporal Coverage: | |
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| Start Date | 2012-09-01 |
| End Date | 2019-10-31 |
| Location: | |
| Location | Van Allen Radiation Belts |
| Detailed Location | 3.0 <= L* <= 5.5 |
| Data Collection: | Code: BAS-RBM (Glauert, S. A., Horne, R. B., and Meredith, N. P. (2014), Three-dimensional electron radiation belt simulations using the BAS Radiation Belt Model with new diffusion models for chorus, plasmaspheric hiss, and lightning-generated whistlers, J. Geophys. Res. Space Physics, 119, 268- 289, doi:10.1002/2013JA019281.) Code: PADIE (Glauert, S. A., and Horne, R. B. (2005), Calculation of pitch angle and energy diffusion coefficients with the PADIE code, J. Geophys. Res., 110, A04206, doi:10.1029/2004JA010851.) |
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| Distribution: | |
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| Distribution Media | Online Internet (HTTP) |
| Distribution Size | 100 kB |
| Distribution Format | CDF |
| Fees | N/A |
| Data Storage: | 3 x CDF files |