Full Record - Cyclone tracks for the region south of 60S for 1979 - 2018 derived from 6-hourly ERA-Interim reanalysis mean sea level pressure (MSLP) fields

Cyclone tracks for the region south of 60S for 1979 - 2018 derived from 6-hourly ERA-Interim reanalysis mean sea level pressure (MSLP) fields

GB/NERC/BAS/PDC/01328

Abstract:
Cyclone tracks for the region south of 60S for 1979 - 2018, derived by applying the University of Melbourne cyclone tracking software to ECMWF ERA-Interim reanalysis MSLP fields at 6-hourly temporal and ~1.125 degree spatial resolution.

Citation:
Phillips, T. (2020). Cyclone tracks for the region south of 60S for 1979 - 2018 derived from 6-hourly ERA-Interim reanalysis mean sea level pressure (MSLP) fields (Version 1.0) [Data set]. UK Polar Data Centre, Natural Environment Research Council, UK Research & Innovation. https://doi.org/10.5285/d3b5d87d-c882-4fed-9d47-14c73be43bca

Access Data

GET DATA

https://ramadda.data.bas.ac.uk/repository/entry/show?entryid=d3b5d87d-c882-4fed-9d47-14c73be43bca

REFERENCE MATERIALS

SOFTWARE PACKAGES

http://www.cycstats.org/tracks/cychome.htm

License

Access:	No restrictions apply.
Use:	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/.

Authors

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

Name	Tony Phillips
Role(s)	Investigator, Technical Contact
Organisation	British Antarctic Survey

Name	Prof John Turner
Role(s)	Investigator
Organisation	British Antarctic Survey

Basic Information

Creation Date:	2020-05-04
Dataset Progress:	Complete
Dataset Language:	English
ISO Topic Categories:	Climatology/Meteorology/Atmosphere
Parameters:	Atmosphere > Atmospheric Phenomena > Cyclones Atmosphere > Atmospheric Phenomena > Storms

Additional Information

Quality:	As the cyclone tracking software was run in overlapping 18-month periods, the results were subjected to the following quality checks before being combined: 1. The number of cyclone tracks for each year was checked to ensure that it did not exceed 100,000. This check ensured that the track numbers in the combined record were unique - see the definition of Track under "Data structure and data format". 2. The results were checked to ensure that no cyclone track that started in October of year N-1 continued into year N and that no cyclone track that started in year N continued into March of year N+1. This ensured that no cyclones were truncated by using the cyclone tracks starting from 06Z on 1-Jan in each year to 00Z on 1-Jan of the following year to create the combined data set. 3. The results for successive years were checked to ensure that all cyclone tracks starting between 00Z on 1-Nov of year N and 00Z on 1-Mar of year N+1 were identical between the cyclone tracking software runs for year N and year N+1. These quality checks were passed successfully in all cases.
Lineage/Methodology:	MSLP fields from the ECMWF ERA-Interim reanalysis [1] were downloaded for the period 1-Jan-1979 to 31-Mar-2019 on a reduced Gaussian N80 (~1.125 degree) grid. These data, interpolated onto a full Gaussian N80 grid, were used to drive the University of Melbourne cyclone tracking software [2] for overlapping 18-month periods. The resulting cyclone tracks were combined (using the cyclone tracks starting from 06Z on 1-Jan in each year to 00Z on 1-Jan of the following year) to create a single global record of cyclone tracks including all tracked cyclones starting from 06Z on 1-Jan-1979 to 00Z on 1-Jan-2019. This data set contains the subset of the global record comprising all cyclones that contain at least one point south of 60°S. [1] Dee, D.P., Uppala, S.M., Simmons, A.J., Berrisford, P., Poli, P., Kobayashi, S., Andrae, U., Balmaseda, M.A., Balsamo, G., Bauer, P., Bechtold, P., Beljaars, A.C.M., van de Berg, L., Bidlot, J., Bormann, N., Delsol, C., Dragani, R., Fuentes, M., Geer, A.J., Haimberger, L., Healy, S.B., Hersbach, H., Hólm, E.V., Isaksen, L., Kållberg, P., Köhler, M., Matricardi, M., McNally, A.P., Monge-Sanz, B.M., Morcrette, J.-J., Park, B.‐K., Peubey, C., de Rosnay, P., Tavolato, C., Thépaut, J.-N. and Vitart, F. (2011), The ERA-Interim reanalysis: configuration and performance of the data assimilation system. Q.J.R. Meteorol. Soc., 137, 553-597. doi:10.1002/qj.828 [2] Murray, R. J., & Simmonds, I. (1991). A numerical scheme for tracking cyclone centres from digital data. Part I: development and operation of the scheme. Australian Meteorological Magazine, 39, 155-166.

Extent

Temporal Coverage:
Start Date	1979-01-01
End Date	2019-01-01

Spatial Coverage:
Latitude
Southernmost	-90
Northernmost	-60
Longitude
Westernmost	-180
Easternmost	180
Altitude
Min Altitude	N/A
Max Altitude	N/A
Depth
Min Depth	N/A
Max Depth	N/A

Data Resolution:
Latitude Resolution	~1.125 degrees
Longitude Resolution	~1.125 degrees
Horizontal Resolution Range	N/A
Vertical Resolution	N/A
Vertical Resolution Range	N/A
Temporal Resolution	6 hours
Temporal Resolution Range	N/A

Location:
Location	N/A
Detailed Location	Antarctica and the Southern Ocean

Storage

Distribution:
Distribution Media	Online Internet (HTTP)
Distribution Size	90 MB
Distribution Format	ASCII
Fees	N/A

Data Storage:	The cyclone track data are contained in the single .CSV file ERA-Interim_cyclone_tracks_1979-2018_south_of_60S.csv. This file contains a single header row (containing column names) and 1,049,791 data rows. The format of the data rows is described in the file README.TXT, which also includes a description of the parameters used to run the cyclone location and tracking programs.