5b75a1dc-6f24-43bc-b93a-c1dcf633f12a 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 2023-06-02 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 Snow chemical compositions, salinity, surface ozone, BrO and meteorology data at Eureka, Canada in spring of 2018/19 2023-06-02 creation 2023-06-02 revision 2023-06-02 publication 2023-06-02 released 1.0 https://doi.org/10.5285/5b75a1dc-6f24-43bc-b93a-c1dcf633f12a doi GB/NERC/BAS/PDC/01746 https://data.bas.ac.uk/ Please cite this item as: Yang, X., & Strong, K. (2024). Snow chemical compositions, salinity, surface ozone, BrO and meteorology data at Eureka, Canada in spring of 2018/19 (Version 1.0) [Data set]. NERC EDS UK Polar Data Centre. https://doi.org/10.5285/5b75a1dc-6f24-43bc-b93a-c1dcf633f12a Surface snow samples were collected daily from a Canadian high Arctic location at Eureka, Nunavut (80N, 86W) from the end of February to the end of March in 2018 and 2019. The snow samples were collected at several sites representing distinct environments: sea ice, inland close to sea level, and a hilltop ~600 m above sea level. Ion Chromatography (IC) analysis was performed for most of the snow samples. Snow salinity measurement is mainly for surface snow. Surface ozone was measured at sea level (from the Zero Altitude PEARL Auxiliary Laboratory (0PAL)) and lower tropospheric BrO (0-4 km) was measured by MAX-DOAS instrument (at ~610 m located at the Polar Environment Atmospheric Research Laboratory (PEARL)). This study was supported by the UK NERC Arctic office via two UK-Canada bursary programs: "The role of tundra snowpack chemistry in the boundary layer bromine budget at Eureka, Canada" (2018), and "A second investigation of the role of tundra snowpack chemistry in the boundary layer 'bromine explosion'" (2019). The Eureka MAX-DOAS BrO measurements made at the PEARL Ridge Laboratory by the Canadian Network for the Detection of Atmospheric Change (CANDAC) was primarily supported by the Natural Sciences and Engineering Research Council of Canada (NSERC), the Canadian Space Agency (CSA), and Environment and Climate Change Canada (ECCC). No credit. completed Yang, Xin British Antarctic Survey Researcher author Strong, Kimberly University of Toronto 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 > Cryosphere > Snow/Ice > Snow/Ice Chemistry EARTH SCIENCE > Cryosphere > Snow/Ice 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 The Arctic bromide nitrate snow chemistry snow salinity theme Eureka, Nunavut, Canada Canada place Meteorological geographical features 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 otherRestrictions None url url crossReference doi doi crossReference doi doi crossReference doi doi crossReference url url crossReference textTable eng utf8 climatologyMeteorologyAtmosphere -85.92723 -85.92723 79.99295 79.99295 2018-02-25 2018-03-31 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/plain text/csv application/x-hdf application/netcdf bytes 19922944 https://ramadda.data.bas.ac.uk/repository/entry/show?entryid=5b75a1dc-6f24-43bc-b93a-c1dcf633f12a WWW:LINK-1.0-http--link Get Data Download data download bytes 19922944 https://ramadda.data.bas.ac.uk/repository/entry/show?entryid=5b75a1dc-6f24-43bc-b93a-c1dcf633f12a WWW:LINK-1.0-http--link Get Data Download data download bytes 19922944 https://ramadda.data.bas.ac.uk/repository/entry/show?entryid=5b75a1dc-6f24-43bc-b93a-c1dcf633f12a WWW:LINK-1.0-http--link Get Data Download data download bytes 19922944 https://ramadda.data.bas.ac.uk/repository/entry/show?entryid=5b75a1dc-6f24-43bc-b93a-c1dcf633f12a WWW:LINK-1.0-http--link Get Data Download data download dataset Methodology: Sampling site: The snow was sampled at several sites representing distinct environments: sea ice, inland close to sea level, and a hilltop ~600 m above sea level (asl). All snow samples collected were transferred to 50 mL polypropylene tubes with screw caps (Corning CentriStar), which prior to field deployment had been rinsed with ultra-high-purity (UHP) water and dried in a class 100 clean laboratory in Cambridge, UK. Ionic analysis: All samples were only melted prior to the ion chromatography (IC) analysis, apart from a small portion of the samples that had been melted for salinity measurements. All 2019 samples were filtered using Millex-GP Express PES Membrane, Sterile, 33 mm, 0.22 µm filters (Merck Millipore Ltd., Cork, Ireland). The 2018 snow samples were analysed using Thermo Scientific Dionex ICS-4000 ion chromatography systems, with ions of Na+, Ca2+, Mg2+, K+, NH4+, Cl-, Br-, SO4=, NO3-, F-, acetate, formate, oxalate and MSA measured. The 2019 samples for IC analysis were run on a Dionex ICS-5000+ with ions of Na+, Ca2+, Mg2+, K+, Cl-, Br-, SO4=, NO3-, and MSA measured. Anion analysis was performed using an ionPac AS18-Fast-4 µm column, and cation analysis was performed using an IonPac CS12A column. Multiple samples were analysed to assess precision. Snow salinity: Snow salinity was measured using a conductivity meter (SensIon 5, Hach) with a measurement range of 0-200 mScm-1 and a maximum resolution of 0.1 µScm-1 at low conductivities (0-199.9 µScm-1). Conductivity values were converted into psu, approximately equivalent to the weight of dissolved inorganic matter in grams per kilogram of seawater. MAX-DOAS measurements of BrO: Multi-axis Differential Optical Absorption Spectroscopy (MAX-DOAS) measurements of BrO partial columns were performed at the PEARL Ridge Lab. Spectra were recorded in the ultra-violet (UV) using a grating spectrometer (spectral resolution 0.45 nm) with a cooled (200 K) charge-coupled device (CCD) detector at 0.4-0.5 nm resolution. Elevation angles of 30°, 15°, 10°, 5°, 2°, 1°, and -1° were used in the elevation scans, and measurements were only taken with solar elevation above 4°. Differential slant column densities (dSCDs) of BrO and the oxygen dimer (O4) were retrieved using the DOAS technique. dSCDs were converted to profiles using a two-step optimal estimation method. The retrievals were performed for 0-4 km altitude on a grid with 0.2-km resolution. Due to the elevation of the measurement site, the instrument often measures BrO in the free troposphere, except during strong wind episodes and storms that generate a deep boundary layer (Bognar et al., 2020). Surface ozone: Surface ozone measurements were made by a TEI 49i ozone analyzer deployed at 0PAL. Meteorology data: There are two sets of local meteorology data used: one from EWS (the archived data are available at Historical Data - Climate - Environment and Climate Change Canada (ECCC) (weather.gc.ca)) and one from the PEARL Ridge Lab. The PEARL data is not open to the public; to access the data, contact Pierre Fogal at the University of Toronto. The UV index measured during the campaign period in 2018 and 2019 is from the ECCC Brewer spectrophotometer (https://doi.org/10.1029/2004JD004820). Locations: The major sampling sites are from a Canadian high Arctic location at Eureka, Nunavut (80°N, 86°W). They include sampling sites at close to sea level: Creek and 0PAL at 79.59.577N, 85.55.634W; Sea ice site at 80.00.130N, 86.07.244W; Onshore site at 80.00.215N, 86.07.145W, and at a hilltop PEARL Ridge lab (600m) at 80.03.208N, 86.25.381W. Data collection: Instrumentation: Ionic analysis: Thermo Scientific Dionex ICS-4000 ion chromatography systems for 2018 samples and Dionex ICS-5000+ for 2019 samples Conductivity meter: SensIon 5, Hach BrO profile: Multi-axis Differential Optical Absorption Spectroscopy (MAX-DOAS) Surface ozone: TEI 49i ozone analyzer Data quality: In the ionic analysis for 2019 samples, the limit of detection (LOD) is 3 times standard deviation of filter blank average peak area, and the limit of quantification (LOQ) is 10 times standard deviation of filter blank average peak area for all sequences (~40 samples analysed per sequence). The LOD of Br- is 0.200 um with a relative standard deviation of 0.023 um and the LOD of NO3- is 0.484 um with a relative standard of deviation of 0.037 um. The accuracy of snow salinity as stated by the manufacturer is +/-0.001 psu at low salinities (<1 psu). asNeeded completed