Pitch angle diffusion coefficients used to calculate electron precipitation from the Earth's radiation belts

This dataset contains two NetCDF files: Chorus_daa.nc (labelled from here as a) which contains the chorus pitch angle diffusion coefficients presented in Figure 1 of Reidy et al (2020) and Combined_daa.nc (labelled from here as b) containing the combined pitch angle diffusion coefficients which can be used to do the analysis presented in the remainder of the Reidy et al (2020) paper.

These data sets include:

a. A matrix containing the pitch angle diffusion coefficients for chorus waves at the angle of the loss cone for energies of 30, 100 and 300 keV between L*= 2-7.5, a full range of MLT sectors and for low (1 < Kp < 2), moderate (2 < Kp < 3) and high (4 < Kp < 7) geomagnetic activity levels. These were calculated from an average wave model presented in Meredith et al (2020) to capture the effect of wave-particle interactions in the BAS Radiation Belt Model (BAS-RBM). Also the arrays containing the energy, L*, MLT and Kp dependence are also included.

b, A matrix containing the combined pitch angle diffusion coefficients for chorus, hiss and EMIC waves and coulomb collisions between alpha = 0.5deg -9.45deg, Energy = 28.18-2511.89 keV , L* = 4.25-7.25, MLT = 0-24 and 6 different activity levels. The arrays containing the pitch angle, energy, L*, MLT and Kp dependence are also included.

Funding was provided by NERC Highlight Topic Grant NE/P01738X/1 and NERC National Capability grants NE/R016038/1 and NE/R016445/1

Date (Creation): 2020-07-10

Date (Revision): 2020-07-10

Date (Publication): 2020-07-10

Date (released): 2020-07-10

Edition: 1.0

Unique resource identifier: https://doi.org/10.5285/1ccb7d38-48d8-4206-be34-b218fa763b5a

Codespace: doi

Unique resource identifier: GB/NERC/BAS/PDC/01362

Codespace: https://data.bas.ac.uk/

Unique resource identifier: NE/P01738X/1

Codespace: award

Unique resource identifier: NE/R016038/1

Codespace: award

Unique resource identifier: NE/R016445/1

Codespace: award

Other citation details: Please cite this item as: Reidy, J. (2020). Pitch angle diffusion coefficients used to calculate electron precipitation from the Earth's radiation belts (Version 1.0) [Data set]. UK Polar Data Centre, Natural Environment Research Council, UK Research & Innovation. https://doi.org/10.5285/1ccb7d38-48d8-4206-be34-b218fa763b5a

Credit: No credit.

Status: Completed

Point of contact

Organisation name	Individual name	Electronic mail address	Role
British Antarctic Survey	Reidy, Jade		Author
NERC EDS UK Polar Data Centre		PDCServiceDesk@bas.ac.uk	Point of contact

Maintenance and update frequency: As needed

Maintenance note: Completed

Global Change Master Directory (GCMD) Science Keywords

Theme

Pitch angle diffusion coefficients
radiation belt model
wave-particle interactions

Place

L* between 2 and 7.5 in 0.5L* bins Van Allen Radiation Belts

GEMET - INSPIRE themes, version 1.0

Atmospheric conditions

Access constraints: Other restrictions

Other constraints: no limitations to public access

Access constraints: Other restrictions

Other constraints: no limitations

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Other constraints: Open Government Licence v3.0

Use constraints: Other restrictions

Other constraints: This data is governed by the NERC Data Policy: https://www.ukri.org/who-we-are/nerc/our-policies-and-standards/nerc-data-policy/

Use constraints: Other restrictions

Other constraints: This data is governed by the NERC data policy and supplied under Open Government Licence v.3

Unique resource identifier: doi

Codespace: doi

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Codespace: doi

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Codespace: doi

Association Type: Cross reference

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Unique resource identifier: url

Codespace: url

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Codespace: doi

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Spatial representation type: Text, table

Language: English

Character set: UTF8

Topic category

Climatology, meteorology, atmosphere

Supplemental Information: It is recommended that careful attention be paid to the contents of any data, and that the author be contacted with any questions regarding appropriate use. If you find any errors or omissions, please report them to polardatacentre@bas.ac.uk.

Title: European Petroleum Survey Group (EPSG) Geodetic Parameter Registry

Date (Publication): 2008-11-12

Cited responsible party

Organisation name	Individual name	Electronic mail address	Role
European Petroleum Survey Group		EPSGadministrator@iogp.org	Publisher

Unique resource identifier: urn:ogc:def:crs:EPSG::3031

Version: 6.18.3

Distributor

Distributor contact

Organisation name	Individual name	Electronic mail address	Role
NERC EDS UK Polar Data Centre		PDCServiceDesk@bas.ac.uk	Distributor

Distributor format

Name	Version
application/netcdf
application/x-hdf

Units of distribution: bytes

Transfer size: 1258291

OnLine resource

Protocol	Linkage	Name
WWW:LINK-1.0-http--link	https://ramadda.data.bas.ac.uk/repository/entry/show?entryid=1ccb7d38-48d8-4206-be34-b218fa763b5a	Get Data

Units of distribution: bytes

Transfer size: 1258291

OnLine resource

Protocol	Linkage	Name
WWW:LINK-1.0-http--link	https://ramadda.data.bas.ac.uk/repository/entry/show?entryid=1ccb7d38-48d8-4206-be34-b218fa763b5a	Get Data

Hierarchy level: Dataset

Statement: Methodology:

The diffusion coefficients for the chorus waves were derived using combined observations from seven spacecraft; these observations are binned by L*, MLT, magnetic latitude and geomagnetic activity level as described in Meredith et al. (2012, 2020). In our study we use a chorus diffusion matrix which includes the wave data-set presented in Meredith et al. (2020). To create the data set presented here (a) we interpolated over the entire diffusion matrix in pitch angle to the loss cone angle (assuming a dipole) and in energy to 30, 100 and 300 keV for the aforementioned L*, MLT and activity levels.

In the second data file (b), the pitch angle diffusion coefficients for chorus waves, hiss waves (derived as described in Glauert et al. (2014)), EMIC wave (Kerston et al., 2014) and coloumb collisions (calculated as outlined in Abel and Thorne (1998)) are combined. These diffusion coefficients are initially all interpolated to the same alpha, energy, L*, MLT and activity and then added together. We present a subset of this matrix that was used for the analysis presented in Reidy et al (2020).

Data collection:

These diffusion coefficients were initially calculated using the PADIE code (Glauert & Horne, 2005).

Data quality:

Any places where there are no data are set to NaNs.

Metadata

File identifier: 1ccb7d38-48d8-4206-be34-b218fa763b5a XML

Metadata language: English

Character set: UTF8

Hierarchy level: Dataset

Hierarchy level name: dataset

Date stamp: 2020-07-10

Metadata standard name: ISO 19115 Geographic Information - Metadata

Metadata standard version: ISO 19115:2003(E)

Metadata author

Organisation name	Individual name	Electronic mail address	Role
NERC EDS UK Polar Data Centre		polardatacentre@bas.ac.uk	Point of contact

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