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Row Type Variable Name Attribute Name Data Type Value
attribute NC_GLOBAL _NCProperties String version=2,netcdf=4.7.2,hdf5=1.10.5
attribute NC_GLOBAL cdm_data_type String Other
attribute NC_GLOBAL citation String Schmale, J., Henning, S., Tummon, F., Hartmann, M., Baccarini, A., Welti, A., Lehtipalo, K., Tatzelt, C. and Gysel-Beer, M. (2020). Trace gas mixing ratios measured over the Southern Ocean in the austral summer of 2016/2017, during the Antarctic Circumnavigation Expedition. (Version 1.1) [Data set]. Zenodo. http://doi.org/10.5281/zenodo.4028749
attribute NC_GLOBAL contributors String [{'title': 'Julia Schmale', 'path': 'https://orcid.org/0000-0002-1048-7962', 'email': 'julia.schmale@epfl.ch', 'role': 'author', 'organisation': 'Paul Scherrer Institute, Villigen, Switzerland', 'x_spi_additional_organisation': 'EPFL, Lausanne, Switzerland'}, {'title': 'Silvia Henning', 'path': 'https://orcid.org/0000-0001-9267-7825', 'role': 'author', 'organisation': 'Leibniz Institute for Tropospheric Research, Leipzig, Germany'}, {'title': 'Fiona Tummon', 'path': 'https://orcid.org/0000-0001-9700-1701', 'role': 'author', 'organisation': 'Eidgenössische Technische Hochschule Zürich; MeteoSwiss, Payerne, Switzerland'}, {'title': 'Markus Hartmann', 'path': 'https://orcid.org/0000-0001-9700-1701', 'role': 'author', 'organisation': 'Leibniz Institute for Tropospheric Research, Leipzig, Germany'}, {'title': 'Andrea Baccarini', 'path': 'https://orcid.org/0000-0003-4614-247X', 'role': 'author', 'organisation': 'Paul Scherrer Institute, Villigen, Switzerland'}, {'title': 'Katrianne Lehtipalo', 'path': 'https://orcid.org/0000-0002-1660-2706', 'role': 'author', 'organisation': 'University of Helsinki, Finland'}, {'title': 'Christian Tatzelt', 'path': 'https://orcid.org/0000-0001-7795-5372', 'role': 'author', 'organisation': 'Leibniz Institute for Tropospheric Research, Leipzig, Germany'}, {'title': 'Martin Gysel-Beer', 'path': 'https://orcid.org/0000-0002-7453-1264', 'role': 'author', 'organisation': 'Paul Scherrer Institute, Villigen, Switzerland'}, {'title': 'Jen Thomas', 'path': 'https://orcid.org/0000-0002-5986-7026', 'role': 'publisher', 'organisation': 'Swiss Polar Institute, Switzerland'}]
attribute NC_GLOBAL Conventions String COARDS, CF-1.6, ACDD-1.3
attribute NC_GLOBAL creator_name String Julia Schmale
attribute NC_GLOBAL creator_type String institution
attribute NC_GLOBAL creator_url String https://orcid.org/0000-0002-1048-7962 (external link)
attribute NC_GLOBAL DOI String https://doi.org/10.5281/zenodo.4028749 (external link)
attribute NC_GLOBAL Easternmost_Easting double 179.99936
attribute NC_GLOBAL geospatial_lat_max double 53.97401
attribute NC_GLOBAL geospatial_lat_min double -74.00771
attribute NC_GLOBAL geospatial_lat_units String degrees_north
attribute NC_GLOBAL geospatial_lon_max double 179.99936
attribute NC_GLOBAL geospatial_lon_min double -179.99343
attribute NC_GLOBAL geospatial_lon_units String degrees_east
attribute NC_GLOBAL infoUrl String https://doi.org/10.5281/zenodo.4028749 (external link)
attribute NC_GLOBAL institution String Paul Scherrer Institute, Villigen, Switzerland
attribute NC_GLOBAL keywords String ACE, ACE-SPACE, Antarctic Circumnavigation Expedition, Antarctica, carbon dioxide, carbon monoxide, CO, CO2, CO4, methane, O3, ozone, Southern Ocean, trace gas
attribute NC_GLOBAL license String CC-BY-4.0
attribute NC_GLOBAL Northernmost_Northing double 53.97401
attribute NC_GLOBAL platform_code String UBXH3_ace_2636778
attribute NC_GLOBAL platform_name String R/V Akademik Tryoshnikov
attribute NC_GLOBAL sourceUrl String (local files)
attribute NC_GLOBAL Southernmost_Northing double -74.00771
attribute NC_GLOBAL standard_name_vocabulary String CF Standard Name Table v55
attribute NC_GLOBAL summary String The authors would highly appreciate to be contacted if the data is used for any purpose. We measured mixing ratios of CO, CO2 and CH4 with a PICARRO G2401 Gas Analyzer. Ozone (O3) mixing ratios were measured with a 2B Technology ozone monitor, model 205. We report five-minute averaged data cleaned from exhaust gas influence. Temporal coverage is from December 20, 2016 to April 10, 2017. The trace gas concentrations represent a large number of atmospheric processes that happen on different time scales. CO for example, has basically no sources other than combustion and can hence be used as tracer for air mass transport from regions with combustion activities (e.g., South Africa). CO has a lifetime of a few weeks. CO2 and CH4 are longer-lived trace gases which disperse globally. The data set shows that concentrations in the Northern Hemisphere are higher than in the Southern Hemisphere. Both trace gases are emitted by anthropogenic activities as well as natural sources. Over the cruise track, areas of the Southern Ocean were passed where these trace gases either outgas or are absorbed. Ozone is a secondary trace gas, meaning that it is formed in the atmosphere. Its concentrations are relatively low. All trace gases data have been cleaned from exhaust gas influence.
attribute NC_GLOBAL time_coverage_end String 2017-04-10T23:55:00Z
attribute NC_GLOBAL time_coverage_start String 2016-12-17T00:00:00Z
attribute NC_GLOBAL title String SPI - Trace gas mixing ratios measured over the Southern Ocean in the austral summer of 2016/2017, during the Antarctic Circumnavigation Expedition.
attribute NC_GLOBAL type String ferrybox/ship
attribute NC_GLOBAL Westernmost_Easting double -179.99343
variable time double
attribute time _ChunkSizes uint 512
attribute time _CoordinateAxisType String Time
attribute time actual_range double 1.4819328E9, 1.4918685E9
attribute time axis String T
attribute time description String time
attribute time ioos_category String Time
attribute time long_name String Time
attribute time standard_name String time
attribute time time_origin String 01-JAN-1970 00:00:00
attribute time units String seconds since 1970-01-01T00:00:00Z
attribute time x_spi_emodnet_visualise_variable String False
variable latitude double
attribute latitude _ChunkSizes uint 512
attribute latitude _CoordinateAxisType String Lat
attribute latitude actual_range double -74.00771, 53.97401
attribute latitude attribute String Average latitude of the ship on which the measurements took place, during the five-minute time interval
attribute latitude axis String Y
attribute latitude description String Average latitude of the ship on which the measurements took place, during the five-minute time interval [decimal degrees North]
attribute latitude ioos_category String Location
attribute latitude long_name String Latitude
attribute latitude spi_original_name String latitude [degN]
attribute latitude standard_name String latitude
attribute latitude units String degrees_north
attribute latitude x_spi_emodnet_visualise_variable String False
variable longitude double
attribute longitude _ChunkSizes uint 512
attribute longitude _CoordinateAxisType String Lon
attribute longitude actual_range double -179.99343, 179.99936
attribute longitude attribute String Average longitude of the ship on which the measurements took place, during the five-minute time interval
attribute longitude axis String X
attribute longitude description String Average longitude of the ship on which the measurements took place, during the five-minute time interval [decimal degrees East]
attribute longitude ioos_category String Location
attribute longitude long_name String Longitude
attribute longitude spi_original_name String longitude [degE]
attribute longitude standard_name String longitude
attribute longitude units String degrees_east
attribute longitude x_spi_emodnet_visualise_variable String False
variable o3_concentration double
attribute o3_concentration _ChunkSizes uint 512
attribute o3_concentration actual_range double -1.355, 44.175
attribute o3_concentration description String Concentration of ozone (O3) measured in parts per billion during the five-minute interval [ppb]
attribute o3_concentration spi_original_name String O3 [ppb]
attribute o3_concentration units String ppb
attribute o3_concentration x_spi_emodnet_visualise_variable String True
variable ch4_concentration double
attribute ch4_concentration _ChunkSizes uint 512
attribute ch4_concentration actual_range double 1.778, 1.97
attribute ch4_concentration description String Concentration of methane (CH4) measured in parts per million during the five-minute interval [ppm]
attribute ch4_concentration spi_original_name String CH4 [ppm]
attribute ch4_concentration units String ppm
attribute ch4_concentration x_spi_emodnet_visualise_variable String True
variable co_concentration double
attribute co_concentration _ChunkSizes uint 512
attribute co_concentration actual_range double 0.002, 0.18
attribute co_concentration description String Concentration of carbon monoxide (CO) measured in parts per billion during the five-minute interval [ppb]
attribute co_concentration spi_original_name String CO [ppb]
attribute co_concentration units String ppb
attribute co_concentration x_spi_emodnet_visualise_variable String True
variable co2_concentration double
attribute co2_concentration _ChunkSizes uint 512
attribute co2_concentration actual_range double 395.592, 419.977
attribute co2_concentration description String Concentration of carbon dioxide (CO2) measured in parts per million during the five-minute interval [ppm]
attribute co2_concentration spi_original_name String CO2 [ppm]
attribute co2_concentration units String ppm
attribute co2_concentration x_spi_emodnet_visualise_variable String True

 
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