Law Dome, Antarctica 2000 Year Ice Core CO2, CH4, N2O and d13C-CO2 Data Rubino, M.; Etheridge, D.M.; Thornton, D.P.; Howden, R.; Allison, C.E.; Francey, R.J.; Langenfelds, R.L.; Steele, L.P.; Trudinger, C.; Spencer, D.A.; Curran, M.A.J.; van Ommen, T.D.; Smith, A.M. Rubino, M. Etheridge, D.M. Thornton, D.P. Howden, R. Allison, C.E. Francey, R.J. Langenfelds, R.L. Steele, L.P. Trudinger, C. Spencer, D.A. Curran, M.A.J. van Ommen, T.D. Smith, A.M. earth science/paleoclimate/ice core earth science/paleoclimate/ice core (Law Dome>LATITUDE -66.73>LONGITUDE 112.83) Ice core records of the major atmospheric greenhouse gases (CO2, CH4, N2O) and their isotopologues covering recent centuries provide evidence of biogeochemical variations during the Late-Holocene and Pre-Industrial Periods and over the transition to the Industrial Period. These records come from a number of ice core and firn air sites, and have been measured in several laboratories around the world and show common features, but also unresolved differences. Here we present revised records, including new measurements, performed at the CSIRO Ice Core Extraction LABoratory (ICELAB) on air samples from ice obtained at the high accumulation site of Law Dome (East Antarctica). We are motivated by the increasing use of the records by the scientific community and by recent data-handling developments at CSIRO-ICELAB. A number of cores and firn air samples have been collected at Law Dome to provide high resolution records overlapping recent, direct atmospheric observations. The records have been updated through a dynamic link to the calibration scales used in the Global Atmospheric Sampling LABoratory (GASLAB) at CSIRO, which are periodically revised with information from the latest calibration experiments. The gas-age scales have been revised based on new ice-age scales, and the information derived from a new version of the CSIRO firn diffusion model. Additionally, the records have been revised with new, rule-based selection criteria and updated corrections for biases associated with the extraction procedure, and the effects of gravity and diffusion in the firn. All measurements carried out in ICELAB-GASLAB over the last 25 years are now managed through a database (the ICElab dataBASE or ICEBASE) which provides consistent data management, automatic corrections and selection of measurements, and a web-based user interface for data extraction. We present the new records, discuss their strengths and limitations and summarise their main features. The records reveal changes in the carbon cycle and atmospheric chemistry over the last two millennia, including the major changes of the anthropogenic era and the smaller, mainly natural variations beforehand. They provide the historical data to calibrate and test the next inter-comparison of models used to predict future climate change (Coupled Model Inter-comparison Project - phase 6, CMIP6). The datasets described in this paper, including spline fits, are available at https://doi.org/10.25919/5bfe29ff807fb (Rubino et al., 2018). STUDY NOTES: Law Dome ice core (DSS, DSS0506, DE08 and DE08-2) and firn air (DE08-2 and DSSW20K) records of CO2, CH4 and N2O concentrations for the past 2000 years and d13C-CO2 for the past 1000 years. The latest CSIRO Cape Grim instrumental trace gas data can be found at: https://www.csiro.au/en/Research/OandA/Areas/Assessing-our-climate/Latest-greenhouse-gas-data NCDC-Paleoclimatology https://www.ncdc.noaa.gov/data-access/paleoclimatology-data - Bauer Bruce Investigator : Rubino, M. Investigator : Etheridge, D.M. Investigator : Thornton, D.P. Investigator : Howden, R. Investigator : Allison, C.E. Investigator : Francey, R.J. Investigator : Langenfelds, R.L. Investigator : Steele, L.P. Investigator : Trudinger, C. Investigator : Spencer, D.A. Investigator : Curran, M.A.J. Investigator : van Ommen, T.D. Investigator : Smith, A.M. 2018-12-14 ONLINE Files online, ASCII https://www.ncdc.noaa.gov/paleo/study/25830 https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/antarctica/law/law2018n2o.txt https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/antarctica/law/law2018splines.txt https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/antarctica/law/law2018d13c-co2.txt https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/antarctica/law/law2018ch4.txt https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/antarctica/law/law2018co2.txt https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/antarctica/law/law2018n2o.txt https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/antarctica/law/law2018splines.txt https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/antarctica/law/law2018d13c-co2.txt https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/antarctica/law/law2018ch4.txt https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/antarctica/law/law2018co2.txt English https://www.ncdc.noaa.gov/paleo/study/25830 https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/antarctica/law/law2018n2o.txt https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/antarctica/law/law2018splines.txt https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/antarctica/law/law2018d13c-co2.txt https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/antarctica/law/law2018ch4.txt https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/antarctica/law/law2018co2.txt Mauro Rubino, David Etheridge, David Thornton, Russell Howden, Colin Allison, Roger Francey, Ray Langenfelds, Paul Steele, Cathy Trudinger, Darren Spencer, Mark Curran, Tas Van Ommen, and Andrew Smith2018Revised records of atmospheric trace gases CO2, CH4, N2O and d13C-O2 over the last 2000 years from Law Dome, AntarcticaEarth System Science Data Discussions10.5194/essd-2018-146https://www.earth-syst-sci-data-discuss.net/essd-2018-146/ START YEAR: 154 AD * END YEAR: 1996 AD 112.83 -66.73 112.83 -66.73