Full Record - Ionospheric vorticity across the northern polar ionosphere determined from SuperDARN velocity data - 2000 to 2005 inclusive

Ionospheric vorticity across the northern polar ionosphere determined from SuperDARN velocity data - 2000 to 2005 inclusive

GB/NERC/BAS/PDC/01313

Abstract:
The data set comprises of ionospheric vorticity estimates determined from measurements of ionospheric velocity made by the Super Dual Auroral Radar Network (SuperDARN). The vorticity estimates have been determined across the whole of the northern hemisphere polar ionosphere. The data cover the interval from 2000 to 2005 inclusive.

Citation:
Chisham, G. (2020). Ionospheric vorticity across the northern polar ionosphere determined from SuperDARN velocity data - 2000 to 2005 inclusive (Version 1.0) [Data set]. UK Polar Data Centre, Natural Environment Research Council, UK Research & Innovation. https://doi.org/10.5285/f0149848-bd81-4a3e-ac20-67d347e7d480

Access Data

License

Use:	This data is supplied under Open Government Licence v3.0 http://www.nationalarchives.gov.uk/doc/open-government-licence/version/3/.

Authors

Name	UK PDC
Role(s)	Metadata Author
Organisation	British Antarctic Survey

Name	Gareth Chisham
Role(s)	Investigator, Technical Contact
Organisation	British Antarctic Survey

Basic Information

Creation Date:	2020-03-04
Dataset Progress:	Complete
Dataset Language:	English
ISO Topic Categories:	Climatology/Meteorology/Atmosphere Environment Geoscientific Information
Parameters:	Sun-earth Interactions > Ionosphere/Magnetosphere Dynamics Sun-earth Interactions > Ionosphere/Magnetosphere Dynamics > Electric Fields/Electric Currents Sun-earth Interactions > Ionosphere/Magnetosphere Dynamics > Magnetic Fields/Magnetic Currents Sun-earth Interactions > Ionosphere/Magnetosphere Dynamics > Solar Wind

Additional Information

Reference:	Chisham et al. (2009), Spatial distribution of average vorticity in the high-latitude ionosphere and its variation with interplanetary magnetic field direction and season, J. Geophys. Res., 114, A09301, doi:10.1029/2009JA014263.
Quality:	The overall quality of the vorticity estimates is highly dependent on the raw SuperDARN velocity data that provide the primary data source. These are generally of high quality with low errors. The quality of the vorticity estimates is mostly affected by missing velocity data. To mitigate this the vorticity estimates are only determined when adequate SuperDARN velocity data are available. See Chisham et al. (2009) for full details regarding data quality.
Lineage/Methodology:	The vorticity estimates are determined by identifying SuperDARN velocity measurements around spatially closed loops determined by the geometry of the SuperDARN beam look directions. The vorticity at the centre of these closed loops is determined from the velocity around the loops by using Stokes' theorem. The vorticity determination methodology is outlined in Chisham et al. (2009).

Extent

Temporal Coverage:
Start Date	2000-01-01
End Date	2005-12-31

Spatial Coverage:
Latitude
Southernmost	50
Northernmost	90
Longitude
Westernmost	-150
Easternmost	-20
Altitude
Min Altitude	N/A
Max Altitude	N/A
Depth
Min Depth	N/A
Max Depth	N/A

Location:
Location	Ionosphere
Detailed Location	Canada, USA, and Iceland

Instrumentation

Sensor(s):	RADAR > Radio Detection and Ranging
Data Collection:	The analysis uses SuperDARN data from the Kodiak, Prince George, Saskatoon, Kapuskasing, Stokkseyri and Goose Bay SuperDARN radars. The raw data were analysed using the SuperDARN FitACF v2.5. The data were mapped using the Chisham et al.(2008) virtual height model. The data are presented in Altitude-Adjusted Corrected GeoMagnetic (AACGM) co-ordinates.

Storage

Distribution:
Distribution Media	Online Internet (HTTP)
Distribution Size	321.0 MB
Distribution Format	ASCII
Fees	N/A

Data Storage:	There is a single data file in which each line represents a different vorticity estimate. The data comprise 3 columns (all floats) which represent AACGM latitude, Magnetic Local Time, and Vorticity (in mHz).