Southern Ocean MOCNESS Plankton Tow and Water Chemistry Data Mortyn, P.G.; Charles, C.D. Mortyn, P.G. Charles, C.D. earth science/paleoclimate/paleoceanography (delta 18O,Neogloboquadrina pachyderma,null,per mil PDB,null,paleoceanography,null,null,N,150-250-um fraction) earth science/paleoclimate/instrumental (sigma-t,sea water,null,kilogram per cubic meter,null,instrumental,null,null,N,MOCNESS) earth science/paleoclimate/paleoceanography (Orbulina universa,null,null,count per cubic meter,null,paleoceanography,null,null,N,MOCNESS; count per cubic meter of seawater) earth science/paleoclimate/paleoceanography (delta 18O,Globorotalia truncatulinoides,null,per mil PDB,null,paleoceanography,null,null,N,150-250-um fraction) earth science/paleoclimate/paleoceanography (delta 18O,Orbulina universa,null,per mil PDB,null,paleoceanography,null,null,N,150-250-um fraction) earth science/paleoclimate/paleoceanography (delta 13C,Globorotalia inflata,null,per mil PDB,null,paleoceanography,null,null,N,150-250-um fraction) earth science/paleoclimate/paleoceanography (Neogloboquadrina pachyderma dextral,null,null,count per cubic meter,null,paleoceanography,null,null,N,MOCNESS; count per cubic meter of seawater) earth science/paleoclimate/paleoceanography (Neogloboquadrina pachyderma sinistral,null,null,count per cubic meter,null,paleoceanography,null,null,N,MOCNESS; count per cubic meter of seawater) earth science/paleoclimate/instrumental (collection water depth,null,null,meter,null,instrumental,null,null,N,null) earth science/paleoclimate/paleoceanography (Globorotalia truncatulinoides,null,null,count per cubic meter,null,paleoceanography,null,null,N,MOCNESS; count per cubic meter of seawater) earth science/paleoclimate/paleoceanography (delta 13C,Neogloboquadrina pachyderma,null,per mil PDB,null,paleoceanography,null,null,N,150-250-um fraction) earth science/paleoclimate/paleoceanography (delta 18O,Globorotalia inflata,null,per mil PDB,null,paleoceanography,null,null,N,150-250-um fraction) earth science/paleoclimate/instrumental (fluorescence,sea water,null,milligram per cubic meter,null,instrumental,null,null,N,MOCNESS) earth science/paleoclimate/paleoceanography (delta 13C,Globigerina bulloides,null,per mil PDB,null,paleoceanography,null,null,N,150-250-um fraction) earth science/paleoclimate/paleoceanography (Globorotalia inflata,null,null,count per cubic meter,null,paleoceanography,null,null,N,MOCNESS; count per cubic meter of seawater) earth science/paleoclimate/paleoceanography (delta 13C,Globorotalia truncatulinoides,null,per mil PDB,null,paleoceanography,null,null,N,150-250-um fraction) earth science/paleoclimate/paleoceanography (collection water depth,null,null,meter,null,paleoceanography,null,null,N,null) earth science/paleoclimate/instrumental (sea water temperature,null,null,degree Celsius,null,instrumental,null,null,N,MOCNESS) earth science/paleoclimate/paleoceanography (delta 18O,Globigerina bulloides,null,per mil PDB,null,paleoceanography,null,null,N,150-250-um fraction) earth science/paleoclimate/paleoceanography (Globigerina bulloides,null,null,count per cubic meter,null,paleoceanography,null,null,N,MOCNESS; count per cubic meter of seawater) earth science/paleoclimate/paleoceanography (identified foraminifer,null,null,count per cubic meter,null,paleoceanography,null,null,N,MOCNESS; Turborotalita quinqueloba; count per cubic meter of seawater) earth science/paleoclimate/paleoceanography (delta 13C,Orbulina universa,null,per mil PDB,null,paleoceanography,null,null,N,150-250-um fraction) earth science/paleoclimate/instrumental (salinity,sea water,null,parts per thousand,null,instrumental,null,null,N,MOCNESS) earth science/paleoclimate/paleocean earth science/paleoclimate/paleocean earth science/paleoclimate/paleocean earth science/paleoclimate/paleocean (TNO57-16>LATITUDE -50>LONGITUDE 6) (TNO57-11>LATITUDE -47>LONGITUDE 6) (TNO57-9>LATITUDE -47>LONGITUDE 7) (TNO57-22>LATITUDE -43>LONGITUDE 12) (TNO57-13>LATITUDE -53>LONGITUDE 5) (TNO57-21>LATITUDE -41>LONGITUDE 8) Plankton tows conducted in the Atlantic sector of the Southern Ocean allow analysis of the influence of water column structure on planktonic foraminiferal abundance and d18O composition. Foraminiferal abundance varies by several orders of magnitude across a large gradient in sea surface temperature and other hydrographic features, demonstrating high sensitivity of foraminiferal populations to regional differences in water properties. The depth of maximum abundance for key species such as Globigerina bulloides and Neogloboquadrina pachyderma is not constant from station to station. The pattern suggests that their abundance and shell chemistry are tied to density horizons or other conditions (such as food availability) that become more sharply defined with depth in the northern subantarctic. The consistent observation of Globorotalia inflata and Globoratalia truncatulinoides as relatively deep-dwelling species confirms their utility as indicators of upper thermocline properties. In d18O all species are observed to be isotopically lighter than predicted from water properties, but the species-specific offset is fairly uniform at all stations. These observations define the utility of multispecies d18O for reconstructing temperature and density stratification from past surface oceans. STUDY NOTES: Plankton tow foraminiferal census and stable isotope (d18O and d13C) and water chemistry data collected near 6 drill sites in the Atlantic sector of the Southern Ocean. d18O analyses were carried out on the 150-250-um fraction of Globigerina bulloides, Neogloboquadrina pachyderma, Globorotalia truncatulinoides, Globorotalia inflata, and Orbulina universa. NCDC-Paleoclimatology https://www.ncdc.noaa.gov/data-access/paleoclimatology-data - Bauer Bruce Investigator : Mortyn, P.G. Investigator : Charles, C.D. 2017-04-24 ONLINE Files online, ASCII https://www.ncdc.noaa.gov/paleo/study/21990 https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/mortyn2003/mortyn2003tno57-9foram.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/mortyn2003/mortyn2003tno57-13foram.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/mortyn2003/mortyn2003tno57-21water.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/mortyn2003/mortyn2003tno57-11foram.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/mortyn2003/mortyn2003tno57-16foram.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/mortyn2003/mortyn2003tno57-22foram.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/mortyn2003/mortyn2003tno57-13water.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/mortyn2003/mortyn2003tno57-16water.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/mortyn2003/mortyn2003tno57-22water.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/mortyn2003/mortyn2003tno57-9water.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/mortyn2003/mortyn2003tno57-11water.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/mortyn2003/mortyn2003tno57-21foram.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/mortyn2003/mortyn2003tno57-9foram.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/mortyn2003/mortyn2003tno57-13foram.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/mortyn2003/mortyn2003tno57-21water.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/mortyn2003/mortyn2003tno57-11foram.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/mortyn2003/mortyn2003tno57-16foram.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/mortyn2003/mortyn2003tno57-22foram.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/mortyn2003/mortyn2003tno57-13water.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/mortyn2003/mortyn2003tno57-16water.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/mortyn2003/mortyn2003tno57-22water.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/mortyn2003/mortyn2003tno57-9water.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/mortyn2003/mortyn2003tno57-11water.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/mortyn2003/mortyn2003tno57-21foram.txt English https://www.ncdc.noaa.gov/paleo/study/21990 https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/mortyn2003/mortyn2003tno57-9foram.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/mortyn2003/mortyn2003tno57-13foram.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/mortyn2003/mortyn2003tno57-21water.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/mortyn2003/mortyn2003tno57-11foram.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/mortyn2003/mortyn2003tno57-16foram.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/mortyn2003/mortyn2003tno57-22foram.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/mortyn2003/mortyn2003tno57-13water.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/mortyn2003/mortyn2003tno57-16water.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/mortyn2003/mortyn2003tno57-22water.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/mortyn2003/mortyn2003tno57-9water.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/mortyn2003/mortyn2003tno57-11water.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/mortyn2003/mortyn2003tno57-21foram.txt P. Graham Mortyn and Christopher D. Charles2003Planktonic foraminiferal depth habitat and d18O calibrations: Plankton tow results from the Atlantic sector of the Southern OceanPaleoceanography18210.1029/2001PA000637http://onlinelibrary.wiley.com/doi/10.1029/2001PA000637/full START YEAR: 1996 AD * END YEAR: 1997 AD 5 -53 12 -41