Nitrogen and Carbon Isotope Data from the Central Arctic Ocean Schubert, C.J.; Stein, R.; Calvert, S.E. Schubert, C.J. Stein, R. Calvert, S.E. earth science/paleoclimate/paleoceanography (delta 15N,sediment,null,per mil,null,paleoceanography,null,null,N,null) earth science/paleoclimate/paleoceanography (organic carbon,sediment,null,weight percent,null,paleoceanography,null,null,N,null) earth science/paleoclimate/paleoceanography (delta 13C,organic matter,null,per mil PDB,null,paleoceanography,null,null,N,null) earth science/paleoclimate/paleoceanography (calcium carbonate,sediment,null,percent,null,paleoceanography,null,null,N,null) earth science/paleoclimate/paleoceanography (depth,null,null,centimeter,null,paleoceanography,null,null,N,null) earth science/paleoclimate/paleocean earth science/paleoclimate/paleocean earth science/paleoclimate/paleocean (PS2185-4>LATITUDE 87.5>LONGITUDE 144.47) (PS2170-4>LATITUDE 87.58>LONGITUDE 60.88) (PS2178-4>LATITUDE 88.02>LONGITUDE 159.58) (PS2163-1>LATITUDE 86.23>LONGITUDE 59.2) We have reconstructed the surface water environment of the Arctic Ocean over the last ~50,000 years using measurements of the organic nitrogen and carbon isotope ratios, carbonate and total organic carbon concentrations (TOC), and terrestrial biomarkers (lignin and long-chain n-alkanes) in four multicores. Variations in nitrogen isotope ratios that are concordant with TOC and carbonate concentrations (representing foraminifera and excluding ice-rafted-debris) reflect differences in relative nutrient utilization of phytoplankton in the surface waters. However, ŋ15N variations also appear to be dependent on the stratification of the water column and therefore potentially track the exchange of nutrients between deep and surface waters. Low Last Glacial Maximum (LGM) ŋ15N values and higher Holocene values are opposite to those recorded in the Southern Ocean. The Arctic Ocean with higher nutrient utilization today compared to the LGM therefore acts as a counterpart to the Southern Ocean, although the global impact on carbon dioxide variations compared to the Southern Ocean is probably low. NCDC-Paleoclimatology https://www.ncdc.noaa.gov/data-access/paleoclimatology-data - Bauer Bruce Investigator : Schubert, C.J. Investigator : Stein, R. Investigator : Calvert, S.E. 2001-07-01 ONLINE Files online, ASCII https://www.ncdc.noaa.gov/paleo/study/2593 https://www1.ncdc.noaa.gov/pub/data/paleo/paleocean/sediment_files/complete/ps2163-1-tab.txt https://www1.ncdc.noaa.gov/pub/data/paleo/paleocean/sediment_files/complete/ps2178-4-tab.txt https://www1.ncdc.noaa.gov/pub/data/paleo/paleocean/sediment_files/complete/ps2185-4-tab.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/schubert2001 https://www1.ncdc.noaa.gov/pub/data/paleo/paleocean/sediment_files/complete/ps2170-4-tab.txt https://www1.ncdc.noaa.gov/pub/data/paleo/paleocean/sediment_files/complete/ps2163-1-tab.txt https://www1.ncdc.noaa.gov/pub/data/paleo/paleocean/sediment_files/complete/ps2178-4-tab.txt https://www1.ncdc.noaa.gov/pub/data/paleo/paleocean/sediment_files/complete/ps2185-4-tab.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/schubert2001 https://www1.ncdc.noaa.gov/pub/data/paleo/paleocean/sediment_files/complete/ps2170-4-tab.txt English https://www.ncdc.noaa.gov/paleo/study/2593 https://www1.ncdc.noaa.gov/pub/data/paleo/paleocean/sediment_files/complete/ps2163-1-tab.txt https://www1.ncdc.noaa.gov/pub/data/paleo/paleocean/sediment_files/complete/ps2178-4-tab.txt https://www1.ncdc.noaa.gov/pub/data/paleo/paleocean/sediment_files/complete/ps2185-4-tab.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/schubert2001 https://www1.ncdc.noaa.gov/pub/data/paleo/paleocean/sediment_files/complete/ps2170-4-tab.txt Schubert, C.J., R. Stein, and S.E. Calvert. 2001. Tracking nutrient and productivity variations over the last deglaciation in the Arctic Ocean. Paleoceanography 16(2):199-211. 59.2 86.23 159.58 88.02