Polar Ice Cores 3,000 Year Nitrous Oxide d15N and d18O Data Prokopiou, M.; Sapart, C.J.; Rosen, J.; Sperlich, P.; Blunier, T.; Brook, E.J.; van de Wal, R.S.W.; Röckmann, T. Prokopiou, M. Sapart, C.J. Rosen, J. Sperlich, P. Blunier, T. Brook, E.J. van de Wal, R.S.W. Röckmann, T. earth science/paleoclimate/ice cores (delta 15N,nitrous oxide,unspecified margin of error,per mil AIR,null,ice cores,null,null,N,delta 15N alpha; 15N content of the central (α) nitrogen position) earth science/paleoclimate/ice cores (delta 15N,nitrous oxide,null,per mil AIR,null,ice cores,null,null,N,delta 15N alpha Toyoda scale; 15N content of the central (α) nitrogen position) earth science/paleoclimate/ice cores (delta 15N,nitrous oxide,null,per mil AIR,null,ice cores,null,null,N,delta 15N beta; 15N content of the terminal (β) nitrogen position) earth science/paleoclimate/ice cores (delta 18O,nitrous oxide,null,per mil VSMOW,null,ice cores,null,continuous-flow isotope ratio mass spectrometry,N,null) earth science/paleoclimate/ice cores (depth,null,null,millimeter,null,ice cores,null,null,N,null) earth science/paleoclimate/ice cores (delta 15N,nitrous oxide,null,per mil AIR,null,ice cores,null,null,N,null) earth science/paleoclimate/ice cores (sample identification,null,null,null,null,ice cores,null,null,C,site name) earth science/paleoclimate/ice cores (nitrous oxide,bulk atmosphere,one standard deviation,parts per billion,null,ice cores,null,null,N,null) earth science/paleoclimate/ice cores (nitrous oxide,bulk atmosphere,unspecified margin of error,nanomole per mole,null,ice cores,null,null,N,null) earth science/paleoclimate/ice cores (delta 15N,nitrous oxide,unspecified margin of error,per mil AIR,null,ice cores,null,null,N,delta 15N beta Toyoda scale; 15N content of the terminal (β) nitrogen position) earth science/paleoclimate/ice cores (delta 18O,nitrous oxide,null,per mil VSMOW,null,ice cores,corrected,continuous-flow isotope ratio mass spectrometry,N,gravity corrected) earth science/paleoclimate/ice cores (nitrous oxide,bulk atmosphere,null,nanomole per mole,null,ice cores,null,null,N,null) earth science/paleoclimate/ice cores (delta 15N,nitrous oxide,null,per mil AIR,null,ice cores,null,null,N,delta 15N alpha; 15N content of the central (α) nitrogen position) earth science/paleoclimate/ice cores (sample identification,null,null,null,null,ice cores,null,null,C,null) earth science/paleoclimate/ice cores (delta 15N,nitrous oxide,unspecified margin of error,per mil AIR,null,ice cores,null,null,N,null) earth science/paleoclimate/ice cores (depth,null,null,meter,null,ice cores,null,null,N,null) earth science/paleoclimate/ice cores (delta 15N,nitrous oxide,null,per mil AIR,null,ice cores,null,continuous-flow isotope ratio mass spectrometry,N,null) earth science/paleoclimate/ice cores (delta 15N,nitrous oxide,null,per mil AIR,null,ice cores,corrected,continuous-flow isotope ratio mass spectrometry,N,gravity corrected delta 15N beta; 15N content of the terminal (β) nitrogen position) earth science/paleoclimate/ice cores (delta 18O,nitrous oxide,null,per mil VSMOW,null,ice cores,null,null,N,null) earth science/paleoclimate/ice cores (delta 15N,nitrous oxide,null,per mil AIR,null,ice cores,null,continuous-flow isotope ratio mass spectrometry,N,delta 15N alpha; 15N content of the central (α) nitrogen position) earth science/paleoclimate/ice cores (delta 15N,nitrous oxide,null,per mil AIR,null,ice cores,null,continuous-flow isotope ratio mass spectrometry,N,delta 15N beta; 15N content of the terminal (β) nitrogen position) earth science/paleoclimate/ice cores (delta 15N,nitrous oxide,null,per mil AIR,null,ice cores,corrected,continuous-flow isotope ratio mass spectrometry,N,gravity corrected delta 15N alpha; 15N content of the central (α) nitrogen position) earth science/paleoclimate/ice cores (delta 15N,nitrous oxide,unspecified margin of error,per mil AIR,null,ice cores,null,null,N,delta 15N beta; 15N content of the terminal (β) nitrogen position) earth science/paleoclimate/ice cores (gas age,null,null,year Common Era,null,ice cores,null,null,N,null) earth science/paleoclimate/ice cores (nitrous oxide,bulk atmosphere,null,parts per billion,null,ice cores,null,null,N,null) earth science/paleoclimate/ice cores (delta 15N,nitrous oxide,null,per mil AIR,null,ice cores,corrected,continuous-flow isotope ratio mass spectrometry,N,gravity corrected) earth science/paleoclimate/ice cores (delta 18O,nitrous oxide,unspecified margin of error,per mil VSMOW,null,ice cores,null,null,N,null) earth science/paleoclimate/ice core earth science/paleoclimate/ice core (NEEM>LATITUDE 77.45>LONGITUDE -51.06) (GRIP>LATITUDE 72.58>LONGITUDE -37.63) (Siple Dome>LATITUDE -81.65>LONGITUDE -148.82) (NGRIP>LATITUDE 75.1>LONGITUDE -42.33) Nitrous oxide (N2O) is a strong greenhouse gas whose mole fraction in the atmosphere has increased over the industrial period. We present a new set of isotope measurements of N2O in air extracted from ice cores covering the last 3,000 years. For the preindustrial (PI) atmosphere, we find an average N2O mole fraction of (267 ± 1) nmol/mol and average tropospheric N2O isotopic values of d15NavPI = (9.5 ± 0.1)permil, d18OPI = (47.1 ± 0.2)permil, d15NalphaPI = (17.8 ± 0.4)permil, and d15NBetaPI = (1.2 ± 0.4)permil. From PI to modern times all isotope signatures decreased with a total change of d15Nav = (-2.7 ± 0.2)permil, d18O = (-2.5 ± 0.4)permil, d15Nalpha = (-2.0 ± 0.7)permil, and d15NBeta (-3.5 ± 0.7)permil. Interestingly, the temporal evolution is not the same for d15Nav and d18O. d18O trends are relatively larger during the early part, and d15Nav trends are larger during the late part of the industrial period, implying a decoupling of sources over the industrial period. Using a mass balance model, we determined the isotopic composition of the total average N2O source. Assuming that the total present source is the sum of a constant natural source and an increasing anthropogenic source, this anthropogenic source has an isotopic signature of d15Navsource,anthrop = (-15.0 ± 2.6)permil, d18Osource,anthrop = (30.0 ± 2.6)permil, d15Nalphasource,anthrop = (-4.5 ± 1.7)permil, and d15NBetasource,anthrop = (-24.0 ± 8.4)permil. The 15N site preference of the source has increased since PI times, which is indicative of a relative shift from denitrification to nitrification sources, consistent with agricultural emissions playing a major role in the N2O increase. STUDY NOTES: Ice core nitrogen and oxygen isotope (d15N and d18O) of nitrous oxide (N2O) data from polar ice cores for the past 3,000 years. NCDC-Paleoclimatology https://www.ncdc.noaa.gov/data-access/paleoclimatology-data - Bauer Bruce Investigator : Prokopiou, M. Investigator : Sapart, C.J. Investigator : Rosen, J. Investigator : Sperlich, P. Investigator : Blunier, T. Investigator : Brook, E.J. Investigator : van de Wal, R.S.W. Investigator : Röckmann, T. 2018-10-31 ONLINE Files online, ASCII https://www.ncdc.noaa.gov/paleo/study/25530 https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/greenland/summit/neem/neem2018n2o-iso.txt https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/greenland/summit/neem/neemfirn2018n2o-iso.txt https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/greenland/summit/ngrip/ngrip2018n2o-iso.txt https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/greenland/summit/grip/gases/grip2018n2o.txt https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/antarctica/siple/siple2018n2o-iso.txt https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/greenland/summit/neem/neem2018n2o-iso.txt https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/greenland/summit/neem/neemfirn2018n2o-iso.txt https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/greenland/summit/ngrip/ngrip2018n2o-iso.txt https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/greenland/summit/grip/gases/grip2018n2o.txt https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/antarctica/siple/siple2018n2o-iso.txt English https://www.ncdc.noaa.gov/paleo/study/25530 https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/greenland/summit/neem/neem2018n2o-iso.txt https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/greenland/summit/neem/neemfirn2018n2o-iso.txt https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/greenland/summit/ngrip/ngrip2018n2o-iso.txt https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/greenland/summit/grip/gases/grip2018n2o.txt https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/antarctica/siple/siple2018n2o-iso.txt M. Prokopiou, C.J. Sapart, J. Rosen, P. Sperlich, T. Blunier, E. Brook, R.S.W. van de Wal, T. Röckmann2018Changes in the Isotopic Signature of Atmospheric Nitrous Oxide and Its Global Average Source During the Last Three MillenniaJournal of Geophysical Research: Atmospheres1231810757-1077310.1029/2018JD029008https://agupubs.onlinelibrary.wiley.com/doi/10.1029/2018JD029008 START YEAR: -689 AD * END YEAR: 2008 AD -148.82 -81.65 -37.63 77.45