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Output of 3D model simulating externally driven ULF waves in Earth's magnetosphere, including the effect of convection on plasmaspheric density

This data set contains the ULF wave model output data required to produce the figures in the article: A. W. Degeling, I. J. Rae, C. E. J. Watt, Q. Q. Shi, R. Rankin and Q. G. Zong, "Control of ULF Wave Accessibility to the Inner Magnetosphere by the Convection of Plasma Density", J. Geophys. Res. (accepted Dec. 2017) doi:10.1002/2017JA024874

The dataset has a Matlab binary file format. It consists of a structure array "d" (with 325 elements). These elements correspond to the 2D parameter scan in driver frequency and elapsed time during plume development performed for this study. The elapsed time parameter has 25 elements, ranging 0 to 24 hours (i.e. 1 hour spacing), and the driver frequency parameter has 13 elements ranging from 1 to 7 mHz (with 0.5 mHz spacing). e.g. use "d = reshape(d,25,13);" to reshape the structure array into 2D with columns for the frequency scan and rows for the elapsed time scan.

The Matlab function "make_PDP_figs.m" is used to read the data, perform the necessary post-processing operations and output the article figures. To produce all six figures, simply run the file without any input arguments.

Simple

Alternate title
Polar Data Centre (PDC) record GB/NERC/BAS/PDC/01054
Date (Publication)
2018-01-25
Identifier
http://www.antarctica.ac.uk/dms/metadata.php?id= / GB/NERC/BAS/PDC/01054
Custodian
  British Antarctic Survey
High Cross, Madingley Road , Cambridge , CB3 0ET , UK
+44 (0)1223 221400
Originator
  Polar Data Centre, Natural Environment Research Council, UK - Degeling, A.
High Cross, Madingley , Cambridge , CB3 0ET , UK
+44 (0)1223 221400
Maintenance and update frequency
unknown Unknown
Keywords
  • NDGO0001
NERC OAI Harvesting
  • NERC_DDC
GCMD Parameter Valids
  • EARTH SCIENCE > Sun-earth Interactions > Ionosphere/Magnetosphere Dynamics
  • EARTH SCIENCE > Sun-earth Interactions > Ionosphere/Magnetosphere Dynamics > Plasma Waves
BAS Free-text keywords
  • Magnetosphere
  • Model
  • ULF
Use limitation
This data is governed by the NERC data policy http://www.nerc.ac.uk/research/sites/data/policy/ and supplied under Open Government Licence v3 http://www.nationalarchives.gov.uk/doc/open-government-licence/version/3/.
Access constraints
otherRestrictions Other restrictions
Other constraints
This data is governed by the NERC data policy http://www.nerc.ac.uk/research/sites/data/policy/ and supplied under Open Government Licence v3 http://www.nationalarchives.gov.uk/doc/open-government-licence/version/3/.
Metadata language
EnglishEnglish
Topic category
  • Climatology, meteorology, atmosphere
  • Environment
  • Geoscientific information
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Begin date
unknown
End date
unknown
Reference system identifier
OGP / urn:ogc:def:crs:EPSG::4326
Distribution format
Distributor
  Polar Data Centre - British Antarctic Survey
+44 (0)1223 221400
OnLine resource
GET DATA ( http )
Hierarchy level
dataset Dataset

Domain consistency

Measure identification
INSPIRE / Conformity_001

Conformance result

Date
Explanation
See the referenced specification
Pass
No
Statement

Each element, consists of the data output from a single run of the model (for input parameters defined in the field ips) and contains the following fields:

pn: [2x17102 double]: Refined resolution mesh node data - see Matlab PDE toolbox documentation.

en: [7x889 double]: Refined resolution mesh edge segment data - see Matlab PDE toolbox documentation.

tn: [4x33854 double]: Refined resolution mesh triangle data - see Matlab PDE toolbox documentation.

p0: [2x2121 double]: Coarse mesh node data - see Matlab PDE toolbox documentation.

e0: [7x385 double]: Coarse mesh edge segment data - see Matlab PDE toolbox documentation.

t0: [4x4098 double]: Coarse mesh triangle data - see Matlab PDE toolbox documentation.

L2: [2121x20 double]: Shear Alfven Wave eigenvalues calculated on the coarse mesh.

ips: [1x1 struct]: Model input parameters - contact A. W. Degeling for more information.

rho: [2121x1 double]: equatorial plasma mass density, defined on the coarse mesh.

u: [342040x1 double]: ULF wave electric field raw output data, defined on the refined mesh. This data consists of the complex amplitudes of cartesian components (in the equatorial plane) for 10 spectral method basis functions (in the field-aligned direction) which are used to define the wave electric field on the equatorial mesh. The equatorial electric field components Ex and Ey are given by simply summing over these 10 amplitudes. For example, Ex and Ey (in mV/m) are obtained by the following Matlab code:

N = 10; nn = 1:N; no_ps = length(pn(1,:)); mVpm = ips.const.mVpm;

uu = reshape(u,no_ps,2.*N);

Ex = sum(uu(:,2.*nn-1),2).*mVpm;

Ey = sum(uu(:,2.*nn),2).*mVpm;

The Matlab function "make_PDP_figs.m" is used to read the data, perform the necessary post-processing operations and output the article figures. To produce all six figures, simply run the file without any input arguments.

File identifier
GB_NERC_BAS_PDC_01054 XML
Metadata language
EnglishEnglish
Hierarchy level
dataset Dataset
Date stamp
2018-01-25
Metadata standard name
NERC profile of ISO19115:2003
Metadata standard version
1.0
Point of contact
  British Antarctic Survey
+44 (0)1223 221400
Dataset URI
http://www.antarctica.ac.uk/dms/metadata.php?id=GB/NERC/BAS/PDC/01054
 
 

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