414e2d72-cf70-413f-a5c9-ff5312d222f8 eng utf8 dataset dataset NERC EDS UK Polar Data Centre +44 (0)1223 221400 British Antarctic Survey, High Cross, Madingley Road Cambridge Cambridgeshire CB3 0ET United Kingdom polardatacentre@bas.ac.uk https://www.bas.ac.uk/team/business-teams/information-services/uk-polar-data-centre/ information pointOfContact 2021-05-27 ISO 19115 Geographic Information - Metadata ISO 19115:2003(E) European Petroleum Survey Group (EPSG) Geodetic Parameter Registry 2008-11-12 publication European Petroleum Survey Group EPSGadministrator@iogp.org https://www.epsg-registry.org/ EPSG Geodetic Parameter Dataset The EPSG Geodetic Parameter Dataset is a structured dataset of Coordinate Reference Systems and Coordinate Transformations, accessible through this online registry. information publisher urn:ogc:def:crs:EPSG::3031 6.18.3 CPC particle count at Halley VIa CASLab 2020 2021-05-27 creation 2021-05-27 revision 2021-05-27 publication 2021-05-27 released 1.0 https://doi.org/10.5285/414e2d72-cf70-413f-a5c9-ff5312d222f8 doi GB/NERC/BAS/PDC/01508 https://data.bas.ac.uk/ Please cite this item as: Eveson, J., & Squires, F. (2021). CPC particle count at Halley VIa CASLab 2020 (Version 1.0) [Data set]. NERC EDS UK Polar Data Centre. https://doi.org/10.5285/414e2d72-cf70-413f-a5c9-ff5312d222f8 A TSI CPC (Condensation Particle Counter) Model 3010 was installed at Halley's Clean Air Sector Laboratory (CASLab), a mile from the station's generator, in the (austral) summer of 2019/20 and began collecting data in February as a long term dataset. The inlet is a 3m length of antistatic tubing, with a portion left untethered so that it can move with the prevailing wind. This is to prevent icing of the inlet by allowing the inlet to stay out of the direct line of any snow or ice being blown around. Any movement from the wind should allow any hoar frost that builds up to fall off. The instrument was installed by Joshua Eveson and the primary contact for the dataset is Freya Squires. No credit. completed Eveson, Joshua British Antarctic Survey Researcher author Squires, Freya British Antarctic Survey Researcher author NERC EDS UK Polar Data Centre +44 (0)1223 221400 British Antarctic Survey, High Cross, Madingley Road Cambridge Cambridgeshire CB3 0ET United Kingdom PDCServiceDesk@bas.ac.uk https://www.bas.ac.uk/team/business-teams/information-services/uk-polar-data-centre/ information pointOfContact asNeeded completed EARTH SCIENCE > Atmosphere > Aerosols > Cloud Condensation Nuclei EARTH SCIENCE > Atmosphere > Aerosols theme Global Change Master Directory (GCMD) Science Keywords 2026-01-27 publication 23 Global Change Data Center, Science and Exploration Directorate, Goddard Space Flight Center (GSFC) National Aeronautics and Space Administration (NASA) Greenbelt MD United States of America https://earthdata.nasa.gov/about/gcmd/global-change-master-directory-gcmd-keywords Global Change Master Directory (GCMD) Keywords The information provided on this page seeks to define how the GCMD Keywords are structured, used and accessed. It also provides information on how users can participate in the further development of the keywords. information publisher Antarctica CPC Halley aerosol particles theme Halley VIa CASLab Antarctica place Atmospheric conditions theme GEMET - INSPIRE themes, version 1.0 2021-01-06 revision otherRestrictions no limitations to public access otherRestrictions no limitations license Open Government Licence v3.0 otherRestrictions Data supplied under Open Government Licence v3.0 url url crossReference url url crossReference textTable eng utf8 climatologyMeteorologyAtmosphere -25.4889 -25.4889 -75.569 -75.569 2020-02-25 2020-12-31 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. NERC EDS UK Polar Data Centre +44 (0)1223 221400 British Antarctic Survey, High Cross, Madingley Road Cambridge Cambridgeshire CB3 0ET United Kingdom PDCServiceDesk@bas.ac.uk https://www.bas.ac.uk/team/business-teams/information-services/uk-polar-data-centre/ information distributor text/csv bytes 73714893 https://ramadda.data.bas.ac.uk/repository/entry/show?entryid=414e2d72-cf70-413f-a5c9-ff5312d222f8 WWW:LINK-1.0-http--link Get Data Download data download dataset Methodology: The data was gathered by installing the CPC inside the CASLab at Halley station, running a 3m length of antistatic tubing through a Brattberg port in the ceiling and allowing the remaining length of tubing to flow freely in the wind. This is to prevent icing of the inlet by allowing the inlet to stay out of the direct line of any snow or ice being blown around. Any movement from the wind should allow any hoar frost that builds up to fall off. A large hopper of butanol was installed, raised slightly above the CPC in order to provide a constant source of butanol to the instrument through the part of the year where the station is unmanned. The CPC data is similar to that of another dataset, using the same instrument at a similar location (Halley V, also on the Brunt Ice Shelf) during the CHABLIS campaign. The data forms part of the wider Halley VIa CASLab dataset, which is for atmospheric chemistry data from Halley VIa's Clean Air Sector. Data collection: The data was logged by a TS7400 running v1.0.0 of the cpc-acquisitor software. The instrument used is a TSI CPC 3010. Data quality: Whilst processing the data, any line that included the string "LOVAC" or "NOTREADY" was excluded from the final dataset as the instrument would have been unable to function properly. In flagging the data, it was found the highest CPC counts relate to periods of low winds (measured from a nearby Automatic Weather Station), with clear changes in the count around 6kt and 11kt. Therefore, any data coincident with winds below 6kt was flagged as a "2", and any data below 11kt was flagged with a "1". Also, any data within 30mins of a "1" or a "2" was marked with the highest flag from that period. This is so that there is sufficient time to clear any pollutants. Finally, any data with a count higher than 10,000 was marked as a "2" as the CPC 3010 has a high coincidence count rate above this value. Any missing values other than from the exclusion of "LOVAC" or "NOTREADY" data was from temporary powercuts. asNeeded completed