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  • 1
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    Unknown
    Organic carbon and opal in deep sea sediments of the southern and eastern Weddell Sea (1990)
    PANGAEA
    In:  Supplement to: Schlüter, Michael (1990): Zur Frühdiagenese von organischem Kohlenstoff und Opal in Sedimenten des südlichen und östlichen Weddellmeeres. Geochemische Analyse und Modellierung (Early diagenesis of organic carbon and opal in sediments of the southern and eastern Weddell Sea. Geochemical analysis and modelling). Berichte zur Polarforschung = Reports on Polar Research, 73, 156 pp, https://doi.org/10.2312/BzP_0073_1990
    Details
    Publication Date: 2024-07-01
    Description: During the ANT V14 (1986187) and ANT V113 (1987188) cruises of R.V. Polarstern sedirnents from the eastern, southern and central Weddell Sea were sarnpled with a boxcorer andlor a multicorer. The 24 sampling locations are distributed over the whole depth range, from shelf to pelagic environments. Porewater concentrations of aluminium, fluoride, manganese, nitrate, nitrite, oxygen and silicate, the pH and the alkalinity were measured. Of the sediment the opal, calcium carbonate and organic carbon content were quantified. The 210Pb-profile was measured for three sedirnent cores. This investigation deals with the estimation of the amounts of opal and organic carbon (Corg) that are transported into the sediment, the regional distribution of these flux rates and the early diagenetic processes that control the preservation of organic carbon and opal in the sediment. The flux and degradation rates of organic carbon were determined by modelling the rneasured oxygen and nitrate profiles. The highest flux and degradation rates were found in the eastern shelf sediments. Due to the high Corg-flux (〉500 mmol C m**-2 a-1) in this area the oxic environment is restricted to the upper 3 cm of the sediment. In contrast to this, the oxic Zone in the pelagic sedirnents of the Weddell Sea has probably an extension of a few meters. The Corg-flux here, computed from the flux of nitrate throug h the sedimentlwater-interface, is less than 50 mmol C m**-2 a**-1. The flux of organic carbon into the sediments of the continental slope area is usually intermediate between the values computed for the shelf and pelagic sediments. Exceptions are the continental slope region north of Halley Bay. In these sediments the measured oxygen and nitrate profiles indicate a relatively high organic carbon flux. This could be a result of the recurrent development of a coastal polynia in this area. The bioturbation rate determined in this region by a 210Pb-profile is 0,019 cm**2 a**-1. In the Weddell Sea the opal content at the sediment surface (0-1 cm depth) varies between 0,1 and 7 %-wt. These opal concentrations are rnuch lower than the opal contents determined for the sediments of the ROSS Sea by Ledford-Hoffmann et al. (1986 doi:10.1016/0016-7037(86)90263-2). Therefore the importance of the Antarctic shelf regions for the global silica cycle as stated by Ledford-Hoffmann et al. (1986) has to be reconsidered. The regional distribution of the opal content and the computed opal flux rates are correlated with the organic carbon flux rates. The processes controlling the preservation of opal are discussed based On the measured aluminium and silicate concentrations in the Pore water and the opal content of the sediment.The depth distribution of the Si- and Al-concentration of the porewater indicates that the reconstitution of clay minerals takes place in the immediate vicinity of the sediment-water nterface. A characterization of these minerals e.g. the estimation of the Si/AI-ratio (Mackin and Aller, 1984 a doi:10.1016/0016-7037(84)90251-5, 1984 b doi:10.1016/0016-7037(84)90252-7) is not possible. With the program WATEQ2 saturation indices are computed to estimate which minerals could reconstitute. In this context the applicability of programs like WATEQ2 for computations of the species distribution and saturation indices in solutions with the ionic strength of sea water is investigated.
    Keywords: ANT-V/4; ANT-VI/3; Atka Bay; AWI_Paleo; Barents Sea; Camp Norway; Eastern Weddell Sea, Southern Ocean; Filchner Trough; Giant box corer; GKG; Halley Bay; Kapp Norvegia; Lyddan Island; Maud Rise; MG; ms_opal; MUC; Multiboxcorer; MultiCorer; Paleoenvironmental Reconstructions from Marine Sediments @ AWI; Polarstern; PS10; PS10/672; PS10/673; PS10/675; PS10/678; PS10/684; PS10/686; PS10/690; PS10/699; PS10/701; PS10/703; PS10/707; PS10/711; PS10/719; PS10/725; PS10/738; PS10/748; PS10/757; PS10/766; PS10/778; PS10/782; PS10/784; PS10/804; PS10/818; PS10/820; PS10/824; PS12; PS12/289; PS12/300; PS12/302; PS12/305; PS12/310; PS12/312; PS12/319; PS12/336; PS12/338; PS12/340; PS12/344; PS12/348; PS12/352; PS12/366; PS12/368; PS12/374; PS12/380; PS12/382; PS12/458; PS12/465; PS12/472; PS12/486; PS12/490; PS12/510; PS12/526; PS1472-4; PS1473-1; PS1474-1; PS1475-1; PS1477-1; PS1478-1; PS1480-2; PS1483-2; PS1484-2; PS1485-1; PS1486-2; PS1487-1; PS1488-2; PS1489-3; PS1490-2; PS1492-1; PS1493-2; PS1496-2; PS1498-1; PS1499-2; PS1500-2; PS1502-1; PS1507-2; PS1508-2; PS1509-2; PS1587-1; PS1590-1; PS1591-2; PS1593-1; PS1595-2; PS1596-1; PS1596-2; PS1599-1; PS1599-2; PS1605-2; PS1605-3; PS1606-1; PS1606-2; PS1607-1; PS1607-2; PS1609-2; PS1611-1; PS1611-4; PS1613-2; PS1613-3; PS1619-1; PS1620-2; PS1622-1; PS1622-2; PS1625-1; PS1625-2; PS1626-1; PS1635-2; PS1635-3; PS1636-1; PS1636-2; PS1637-2; PS1638-1; PS1638-2; PS1638-3; PS1639-1; PS1639-2; PS1643-3; PS1645-1; PS1645-2; Silicon Cycling in the World Ocean; SINOPS; van Veen Grab; Vestkapp; VGRAB; Weddell Sea; Wegener Canyon
    Type: Dataset
    Format: application/zip, 106 datasets
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  • 2
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    Unknown
    Primary data sets of the hydrographic atlas of the Southern Ocean (1992)
    PANGAEA
    In:  Supplement to: Olbers, Dirk; Gouretski, Viktor V; Seiß, Guntram; Schröter, Jens (1992): The Hydrographic Atlas of the Southern Ocean. Alfred Wegener Institute for Polar and Marine Research, Bremerhaven, Germany, 17 pages, 82 plates, hdl:10013/epic.12913
    Details
    Publication Date: 2024-07-01
    Description: The general knowledge of the hydrographic structure of the Southern Ocean is still rather incomplete since observations particularly in the ice covered regions are cumbersome to be carried out. But we know from the available information that thermohaline processes have large amplitudes and cover a wide range of scales in this part of the world ocean. The modification of water masses around Antarctica have indeed a worldwide impact, these processes ultimately determine the cold state of the present climate in the world ocean. We have converted efforts of the German and Russian polar research institutions to collect and validate the presently available temperature, salinity and oxygen data of the ocean south of 30°S latitude. We have carried out this work in spite of the fact that the hydrographic programme of the World Ocean Circulation Experiment (WOCE) will provide more new information in due time, but its contribution to the high latitudes of the Southern Ocean is quite sparse. The modified picture of the hydrographic structure of the Southern Ocean presented in this atlas may serve the oceanographic community in many ways and help to unravel the role of this ocean in the global climate system. This atlas could only be prepared with the altruistic assistance of many colleagues from various institutions worldwide who have provided us with their data and their advice. Their generous help is gratefully acknowledged. During two years scientists from the Arctic and Antarctic Research Institute in St. Petersburg and the Alfred Wegener Institute for Polar and Marine Research in Bremerhaven have cooperated in a fruitful way to establish the atlas and the archive of about 38749 validated hydrographic stations. We hope that both sources of information will be widely applied for future ocean studies and will serve as a reference state for global change considerations.
    Keywords: 06MT11_5; ABERG_1970-1979_USSR; ABR_1963-1966_USA; Admiral Vladimirskiy; AEL_1982_USSR; Aelita; AFE_1989_USSR; Afeliy; AFEO_1988_USSR; AFII_1951-1969_RSA; Africana (1950); AIOH_1976-1989_USSR; Akademik Berg; Akademik Fedorov; Akademik Knipovich; Akademik Korolev; Akademik Krylov; Akademik Kurchatov; Akademik Mstislav Keldysh; Akademik Shirshov; Akademik Vernadsky; AKN_1965-1981_USSR; AKO_1970-1982_USSR; AKR_1979_USSR; AKU_1971_USSR; AKU_1980-89; AKU_1982_USSR; AKU11; Alba; ALBA_1974_USSR; ALBAC_1979_Portugal; Albacora; ALBAT_1963; Albatross IV (1963); Alferez Mackinlay; ALM_1965_Portugal; Almirante; Almirante Saldanha; AMAC_1928_Argentina; AMK_1982_USSR; ANC_1989_USSR; Anchar; Andrus Iohann; ANT_1961_USSR; ANT_1967_USSR; ANT_1971_USSR; Antares; ANT-II/3; ANT-III/3; Anton Bruun; ANT-V/1; ANT-V/2; ANT-V/3; ANT-VII/4; ANT-VIII/2; AO_1989_USSR; Argo; ARGO_1960-1967_USA; Argus; ARGUS_1971-1984_USSR; ARI_1968_USSR; ARI_1976_USSR; Ariel; AS_1970-1980_USSR; ASA_1958-1977_Brazil; ATII_1967-1980_USA; ATK_1955-1964_USA; Atka; Atlant; ATLANT_1969-1980_USSR; Atlantis II (1963); Atlantniro; AUS_1977_Argentina; AUS_1978_Argentina; AUS_1982_Argentina; Austral; AV_1975_USSR; AV10; AVL_1983_USSR; BAE_1962_Brazil; Baependi; BAHC_1970_USSR; BAHC_1971_USSR; BAHC_1976_USSR; Bahchisarai; Bahia Blanca; Baird_1957-1964_USA; BBL_1957-1983_Argentina; BELO_1965-1967_USSR; Belogorsk; BENTHOS; BER_Brazil; Bertioga; BIS_1958-1968_USA; BLE_1975_USSR; BLE_1976_USSR; Blesk; Bottle, Niskin; BOU_1939_France; Bougenville; BRA_1947_Norway; Brategg; Burton Island; C.H. Davis; CA_1963_France; CAL_1963_Argentina; Cape Torrell; Capitan Armand; Capitan Canepa; CARN_1928_USA; Carnegie; CCA_1957-1986_Argentina; CDAG_1972-1979_USSR; CHA_1951_UK; Challenger; CHAR_1989_USSR; Charoit; Chatyr-Dag; CHD_1969_USA; CHER_1976_USSR; Chernomor; CHI_1960_Chile; CHUM_1965_USSR; Chumikan; Commander Robert Giraud; Comodoro Augusto Las; CORI_1978_France; CORI_1979_France; Coriolis; Cosmonauts Sea; CRG_1960_France; CT; CTO_Australia; D_1928-1930_Denmark; DAE2_1911/12; Dana; DAV_1968_USSR; Davydov; DEG_1966_Australia; Degei; DEU_1911_Germany; Deutschland; DH_1981_Argentina; DH_1982_Argentina; DH_1983_Argentina; DIA_1958_Argentina; Diaguita; DIAM_1959-1967; DIAM_1959-1967_Australia; Diamantina; DIS_1926-1951_UK; Discovery II (1929); DISII_1929-1987_UK; DM_1974_USSR; Dmitry Mendeleev; Doctor Holmberg; Drake Passage; E. Krivosheyev; EAS_USA; Eastwind; EDI_1956-1970_USA; Edisto; EKL_1972_USSR; EKL_1989_USSR; Ekliptika; EKR_1980-1984_USSR; EKV_1971_USSR; Ekvator; EL_1962-1972_USA; ELD_1962_USA; Eldorado; Eltanin; ERN_1977_USSR; Ernest Krenkel; EST_1965_Australia; Estelle Star; ESTO_1970_USSR; Estonia; EVR_1972-1981_USSR; Evrica; EX_UK; EXCEL_1959_France; Excellent; Explorer; Faddey Bellingshausen; FBE_1968-1983_USSR; FIO_1972-1979_USSR; Fiolent; FOT_1974_USSR; FOT_1978_USSR; Foton; FRAI_1970_France; France I; FUJ_1974-1983; Fuji-Maru; GAL_1950-1952_Denmark; Galathea; GAS_1960-1965_Australia; Gascoyne; GEM_1974_USSR; Gemma; General San-Martin; General Zapiola; GERO_1979_USSR; Geroyevka; GID_1980_USSR; Gidrolog; GIZ_1966-1978_USSR; Gizhiga; GL_1956-1976_USA; Glacier; GLE_1967_USA; Glennon; GOY_1970_Argentina; GOY_1972_Argentina; GOY_1973_Argentina; GOY_1974_Argentina; Goyena; Great Australian Bight; GSM_1954-1988_Argentina; GZ_1962_Argentina; GZ_1963_Argentina; GZ_1964_Argentina; GZ_1966_Argentina; HAC_1966_DDR; Hackel; Hakuho-Maru; HAM_1968-1976; Helland Hansen; Hewaibarragi-Maru; HH_1927_Norway; HMA_1973; HUD_1969_Canada; HUD_1970_Canada; HUD69_Canada; HUD70_Canada; Hudson; Idaho Standard; Indian Ocean; INV_1962_Australia; INV_1963_Australia; INV_1964_Australia; Investigator; IO_1975_Argentina; IO_1976_Argentina; IO_1977_Argentina; IO_1978_Argentina; IO_1979_Argentina; ISK_1975_USA; ISKA_1967_USSR; Iskatel; Islas Orcadas; J.D. Gilchrist; Jan Wellem; JDG_1959_RSA; JDG_1960_RSA; JSH_1961-1979_USSR; JUBI_1967_USSR; Jubileyniy; Juliy Shokalskiy; JW_1937_Germany; JW_1938_Germany; Kaiyo-Maru; Kara-Dag; KDA_1971-1981_USSR; KIA_1956_Nigeria; Kiara; KN_1972-1983_USA; Knorr; KOR_1968_USSR; Korifey; KOY_1969; KOY_1972; KOY_1979; Koyo-Maru; KRU_1988_USSR; Krusenstern; KYM_1976; LAN_1966_USSR; LAN_1967_USSR; LAN_1968_USSR; LAN_1969_USSR; LAN_1972_USSR; Langust; LAP_1949_France; LAP_1956_France; Laperouse; La Rochelle; Lena; LENA_1957_USSR; LES_1963-1976_USSR; Lesnoi; LR_1959_France; LYR_1967_USSR; Lyra; M_1924_FRG; M_1925_FRG; M_1926_FRG; M. Uritskiy; M11/5; M11/5-track; MADR_1957-1986_Argentina; Madryn; MAL_1982_USSR; Malta; Maltsevo; MAR_1963_Australia; Marelda; MARI_1979_USA; Marion; Marion Dufresne (1972); Mariya Ulyanova; MARL_1957-1977_USSR; Marlin; Mavel Taylor; MD_1976_France; MD_1981_France; MD_1985; MD_1985_France; MD_1986_France; MD_1987_France; MD_1987a_France; MD08; Meiring Naude; MEL_1972-1983_USA; Melville; Meteor_1924_FRG; Meteor_1925_FRG; Meteor_1926_FRG; Meteor (1924); Meteor (1986); Mihail Kalinin; Mihail Krupskiy; Mihail Somov; Mikhail Lomonosov; MK_1989_USSR; MKAL_1972_USSR; MKR_1980_USSR; MLO_1961-1976_USSR; MLxx; MNA_RSA; MOE_1912_Germany; MOE_1913_Germany; Monokristall; MOS_1974-1980_USSR; MSO_1975_USSR; MSO_1978_USSR; MSO_1981_USSR; MT_1972-1977_USA; MTS_1988_USSR; MUK_1960_USSR; MUK_1964_USSR; Muksun; MULY_1971_USSR; MUR_1969_USSR; MUS_1975_USSR; Musson; MYS_1978_USSR; Myslitel; Mys Ostrovskogo; N. Kuropatkin; NAT_1958-1963_RSA; Natal; NAU_1966-1968_USSR; Nauka; NDA_1981_Australia; NDA_1982_Australia; NDA_1985_Australia; NDA_1987_Australia; NEK_1974_USSR; Nekton; Nella Dan; New Liscard; NIS; NKU_1987_USSR; NLI_1962_Canada; No_ship_1901-1980_no_country; No_ship_1950-1956_France; No_ship_1955-1962_NewZealand; No_ship_1958-1986_Argentina; No_ship_1961_USA; No_ship_1964_USSR; No_ship_1975_USSR; No_ship_1980_Ireland; NORL_1973-1977_USA; Northland; Northwind; NORV_1927-1930_Norway; Norvegia; NOVOC_1980_USSR; NOVOC_1981_USSR; NOVOC_1982_USSR; NOVOC_1989_USSR; Novocheboksarsk; NOVOU_1980_USSR; NOVOU_1981_USSR; NOVOU_1982_USSR; Novoukrainka; NW_1957-1972_USA; Ob; Ob_1956-1973_USSR; OBD_1965_USSR; Obdorsk; Oceanographer; OCG_1967_USA; OCH_1989_USSR; Ocher; OKE_1970_USSR; Okean; OLO_1965_USSR; OLO_1967_USSR; Olonets; ORE_1962_USSR; ORE_1964_USSR; ORE_1965_USSR; Orehovo; ORL_1965_USSR; Orlik; OSM_1981_USSR; Otto Smidt; PAT_1981-1989_USSR; Patriot; Pavel Kaikov; PDE_1984_Argentina; PDERY_1968_USSR; Petr Lebedev; Pioner Latvii; PK_1982_USSR; PL_Germany; PLA_1988_USSR; PLA_1989_USSR; Planet II (1967-2004); PLEBE_1961_USSR; PME_1974_USSR; PME_1976_USSR; PME_1979_USSR; PO_1971_USSR; POI_1972_USSR; POI_1979_USSR; Poisk; Polarnoye Siyaniye; Polarstern; PR_1970_USSR; PR_1979_USSR; PRI_1970_USSR; PRI_1971_USSR; PRI_1981_USSR; Priboy; Priliv; PRO_1966_USSR; PRO_1972_USSR; PRO_1984_USSR; Professor Deryugin; Professor Mesyatsev; Professor Vize; Professor Vodyanitskiy; Professor Zubov; Prognoz; Prydz Bay; PS04; PS04/3-track; PS06/3-track; PS06 SIBEX; PS09/1-track; PS09 WWSP86 SIBEX; PS10/2-track; PS10/3-track; PS10 WWSP86; PS14/4-track; PS14 EPOS I; PS16/2-track; PS16 06AQANTVIII_2; PSI_1981_USSR; PSI_1983_USSR; Puerto Deseado; PV5; PV5_482-2; PVI_1967-1988_USSR; PYR_1973_France; Pyrrhus; PZ_1968-1989_USSR; QUA_1977_USSR; Quantum; RAD_1966_USSR; Raduga; RAN_1958_Argentina; RAN_1966_Argentina; Ranquel; RC_1965-1987_USA; Research station; RET_1963_USSR; Retiviy; Riiser-Larsen Sea; Robert Conrad; Ross Sea; SAG_1963_Australia; Saga; SAL_1971-1989_USSR; Salehard; San Juan; San Luis; Sardinops; SARI_1959-1965_RSA; SAU_1989_USSR; Saulkrasty; Scotia Sea, southwest Atlantic; SES_1966_USSR; Seskar; SEV_1950-1955_USSR; Sevastopol; Sevastopolskiy Rybak; Shirase; Shoyo-Maru; SHR_1981-1987; SIS_1956-1965_USA; SJU_1928_Argentina; SJU_1929_Argentina; Skif; SKIF_1969-1980_USSR; SLA_1951-1959_USSR; Slava; SLU_1928_Argentina; SMAR_1965; SOLI_1956_Brazil; Solimoes; South Atlantic Ocean; Southern Ocean; South Pacific Ocean; SPE_1980_USSR; Spectrum; Spencer F. Baird; SRY_1980_USSR; Staten Island; STV_1975_USSR; Stvor; SUC_1968_USSR; Suchan; Sula;
    Type: Dataset
    Format: application/zip, 334 datasets
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  • 3
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    Unknown
    Petrological parameters of sands and sandstones from DSDP and ODP holes in arc-related areas (1992)
    PANGAEA
    In:  Supplement to: Marsaglia, Kathleen M; Ingersoll, Raymond V (1992): Compositional trends in arc-related, deep-marine sand and sandstone: A reassessment of magmatic-arc provenance. Geological Society of America Bulletin, 104(12), 1637-1649, https://doi.org/10.1130/0016-7606(1992)104%3C1637:CTIARD%3E2.3.CO;2
    Details
    Publication Date: 2024-07-01
    Description: Detrital modes for 524 deep-marine sand and sandstone samples recovered on circum-Pacific, Caribbean, and Mediterranean legs of the Deep Sea Drilling Project and the Ocean Drilling Program form the basis for an actualistic model for arc-related provenance. This model refines the Dickinson and Suczek (1979) and Dickinson and others (1983) models and can be used to interpret the provenance/tectonic history of ancient arc-related sedimentary sequences. Four provenance groups are defined using QFL, QmKP, LmLvLs, and LvfLvmiLvl ternary plots of site means: (1) intraoceanic arc and remnant arc, (2) continental arc, (3) triple junction, and (4) strike-slip-continental arc. Intraoceanic- and remnant-arc sands are poor in quartz (mean QFL%Q 〈 5) and rich in lithics (QFL%L 〉 75); they are predominantly composed of plagioclase feldspar and volcanic lithic fragments. Continental-arc sand can be more quartzofeldspathic than the intraoceanic- and remnant-arc sand (mean QFL%Q values as much as 10, mean QFL%F values as much as 65, and mean QmKP%Qm as much as 20) and has more variable lithic populations, with minor metamorphic and sedimentary components. The triple-junction and strike-slip-continental groups compositionally overlap; both are more quartzofeldspathic than the other groups and show highly variable lithic proportions, but the strike-slip-continental group is more quartzose. Modal compositions of the triple junction group roughly correlate with the QFL transitional-arc field of Dickinson and others (1983), whereas the strike-slip-continental group approximately correlates with their dissected-arc field.
    Keywords: 110-671; 110-671B; 110-672; 110-672A; 110-674; 110-674A; 13-127; 13-128; 15-148; 15-154; 18-173; 18-174; 18-177; 18-178; 18-179; 18-180; 18-181; 18-182; 19-184; 19-185; 19-186; 19-188; 19-190; 19-191; 21-203; 30-286; 31-290; 31-293; 31-296; 31-297; 31-298; 31-299; 5-32; 5-34; 56-434; 56-435; 57-438; 57-439; 57-440; 58-442; 58-442A; 58-444; 58-444A; 58-445; 58-446; 59-447; 59-448; 59-450; 59-451; 60-453; 60-455; 60-457; 60-458; 60-459; 66-486; 66-488; 66-489; 66-489A; 66-490; 66-491; 66-492; 66-493; 67-494; 67-497; 67-498; 67-498A; 67-499; 67-500; 84-565; 84-566; 84-566C; 84-567; 84-568; 84-569; 84-570; 87-582; 87-583; 87-584; 90-593; Caribbean Sea/RIDGE; COMPCORE; Composite Core; Deep Sea Drilling Project; DRILL; Drilling/drill rig; DSDP; Glomar Challenger; Joides Resolution; Leg110; Leg13; Leg15; Leg18; Leg19; Leg21; Leg30; Leg31; Leg5; Leg56; Leg57; Leg58; Leg59; Leg60; Leg66; Leg67; Leg84; Leg87; Leg90; Mediterranean Sea/TRENCH; North Pacific; North Pacific/BASIN; North Pacific/Bering Strait/BASIN; North Pacific/Bering Strait/PLATEAU; North Pacific/Bering Strait/RIDGE; North Pacific/Bering Strait/SPUR; North Pacific/CREST; North Pacific/FAN; North Pacific/Japan Sea; North Pacific/Philippine Sea/BASIN; North Pacific/Philippine Sea/RIDGE; North Pacific/Philippine Sea/TROUGH; North Pacific/PLAIN; North Pacific/RIDGE; North Pacific/SEDIMENT POND; North Pacific/SLOPE; North Pacific/TRANSITION ZONE; North Pacific/TRENCH; South Atlantic Ocean; South Pacific; South Pacific/BASIN; South Pacific/Tasman Sea/PLATEAU
    Type: Dataset
    Format: application/zip, 39 datasets
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  • 4
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    Unknown
    10Be records of sediment cores from high northern latitudes (1994)
    PANGAEA
    In:  Supplement to: Eisenhauer, Anton; Spielhagen, Robert F; Frank, Martin; Hentzschel, Günter; Mangini, Augusto; Kubik, Peter W; Dittrich-Hannen, Beate; Billen, T (1994): 10Be records of sediment cores from high northern latitudes: Implications for environmental and climatic changes. Earth and Planetary Science Letters, 124(1-4), 171-184, https://doi.org/10.1016/0012-821X(94)00069-7
    Details
    Publication Date: 2024-07-01
    Description: The 10Be records of four sediment cores forming a transect from the Norwegian Sea at 70°N (core 23059) via the Fram Strait (core 23235) to the Arctic Ocean at 86°N (cores 1533 and 1524) were measured at a high depth resolution. Although the material in all the cores was controlled by different sedimentological regimes, the 10Be records of these cores were superimposed by glacial/interglacial changes in the sedimentary environment. Core sections with high 10Be concentrations ( 〉1 * 10**9 at/g) are related to interglacial stages and core sections with low10Be concentrations ( 〈0.5 * 10**9 at/g) are related to glacial stages. Climatic transitions (e.g., Termination II, 5/6) are marked by drastic changes in the 10Be concentrations of up to one order of magnitude. The average 10Be concentrations for each climatic stage show an inverse relationship to their corresponding sedimentation rates, indicating that the 10Be records are the result of dilution with more or less terrigenous ice-rafted material. However, there are strong changes in the 10Be fluxes (e.g., Termination II) into the sediments which may also account for the observed oscillations. Most likely, both processes affected the 10Be records equally, amplifying the contrast between lower (glacials) and higher (interglacials) 10Be concentrations. The sharp contrast of high and low 10Be concentrations at climatic stage boundaries are an independent proxy for climatic and sedimentary change in the Nordic Seas and can be applied for stratigraphic dating (10Be stratigraphy) of sediment cores from the northern North Atlantic and the Arctic Ocean.
    Keywords: Antarctic Ocean; ARK-II/4; ARK-IV/3; AWI_Paleo; Fram Strait; Giant box corer; GIK21524-2 PS11/364-2; GIK21533-3 PS11/412; GIK23059-1; GIK23235-1 PS05/422; GKG; Gravity corer (Kiel type); KAL; Kasten corer; M2/2; Meteor (1986); Norwegian Sea; Paleoenvironmental Reconstructions from Marine Sediments @ AWI; Polarstern; PS05; PS11; PS1235-1; PS1524-2; PS1533-3; Quaternary Environment of the Eurasian North; QUEEN; SL; Svalbard
    Type: Dataset
    Format: application/zip, 4 datasets
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  • 5
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    Unknown
    Sedimentology of surface sediments from the eastern central Arctic Ocean (1994)
    PANGAEA
    In:  Supplement to: Stein, Ruediger; Grobe, Hannes; Wahsner, Monika (1994): Organic carbon, carbonate, and clay mineral distributions in eastern central Arctic Ocean surface sediments. Marine Geology, 119(3-4), 269-285, https://doi.org/10.1016/0025-3227(94)90185-6
    Details
    Publication Date: 2024-07-01
    Description: Results from a detailed sedimentological investigation of surface sediments from the eastern Arctic Ocean indicate that the distribution of different types of sediment facies is controlled by different environmental processes such as sea-ice distribution, terrigenous sediment supply, oceanic currents, and surface-water productivity. In comparison to other open-ocean environments, total organic carbon contents are high, with maximum values in some deep-basin areas as well as west and north of Svalbard. In general, the organic carbon fraction is dominated by terrigenous material as indicated by low hydrogen index values and high C/N ratios, probably transported by currents and/or sea ice from the Eurasian Shelf areas. The amount of marine organic carbon is of secondary importance reflecting the low-productivity environment described for the modern ice-covered Arctic Ocean. In the area north of Svalbard, some higher amounts of marine organic matter may indicate increased surface-water productivity controlled by the inflow of the warm Westspitsbergen Current (WSC) into the Arctic Ocean and reduced sea-ice cover. This influence of the WSC is also supported by the high content of biogenic carbonate recorded in the Yermak Plateau area. The clay mineral distribution gives information about different source areas and transport mechanisms. Illite, the dominant clay mineral in the eastern central Arctic Ocean sediments, reaches maximum values in the Morris-Jesup-Rise area and around Svalbard, indicating North Greenland and Svalbard to be most probable source areas. Kaolinite reaches maximum values in the Nansen Basin, east of Svalbard, and in the Barents Sea. Possible source areas are Mesozoic sediments in the Barents Sea (and Franz-Josef-Land). In contrast to the high smectite values determined in sea-ice samples, smectite contents are generally very low in the underlying surface sediments suggesting that the supply by sea ice is not the dominant mechanism for clay accumulation in the studied area of the modern central Arctic Ocean.
    Keywords: Amundsen Basin; ARK-VIII/2; ARK-VIII/3; AWI_Paleo; Barents Sea; Gakkel Ridge, Arctic Ocean; Giant box corer; GKG; KAL; Kasten corer; Lomonosov Ridge, Arctic Ocean; Makarov Basin; Morris Jesup Rise; MUC; MultiCorer; Nansen Basin; Paleoenvironmental Reconstructions from Marine Sediments @ AWI; Polarstern; PS19/040; PS19/045; PS19/050; PS19/055; PS19/070; PS19/078; PS19/080; PS19/081; PS19/082; PS19/084; PS19/086; PS19/090; PS19/091; PS19/094; PS19/098; PS19/100; PS19/101; PS19/102; PS19/104; PS19/105; PS19/108; PS19/110; PS19/111; PS19/112; PS19/116; PS19/117; PS19/119; PS19/124; PS19/126; PS19/132; PS19/134; PS19/136; PS19/143; PS19/148; PS19/150; PS19/151; PS19/152; PS19/153; PS19/154; PS19/155; PS19/157; PS19/158; PS19/159; PS19/160; PS19/161; PS19/164; PS19/165; PS19/166; PS19/167; PS19/171; PS19/172; PS19/173; PS19/175; PS19/176; PS19/178; PS19/181; PS19/182; PS19/183; PS19/184; PS19/185; PS19/186; PS19/189; PS19/190; PS19/192; PS19/194; PS19/196; PS19/198; PS19/200; PS19/204; PS19/206; PS19/210; PS19/214; PS19/216; PS19/218; PS19/222; PS19/224; PS19/226; PS19/228; PS19/234; PS19/239; PS19/241; PS19/245; PS19/246; PS19/249; PS19/252; PS19 ARCTIC91; PS19 EPOS II; PS2111-2; PS2113-1; PS2114-1; PS2115-1; PS2116-1; PS2117-1; PS2119-2; PS2120-1; PS2121-1; PS2122-1; PS2123-3; PS2124-1; PS2125-2; PS2127-1; PS2128-1; PS2129-2; PS2130-2; PS2131-1; PS2132-3; PS2133-1; PS2134-1; PS2136-3; PS2137-4; PS2138-2; PS2142-3; PS2143-1; PS2144-3; PS2147-3; PS2148-1; PS2149-1; PS2150-1; PS2151-1; PS2153-1; PS2156-1; PS2157-3; PS2157-4; PS2158-1; PS2159-3; PS2159-4; PS2160-3; PS2161-2; PS2161-4; PS2162-1; PS2163-1; PS2163-2; PS2164-1; PS2164-4; PS2165-3; PS2165-5; PS2166-1; PS2166-2; PS2167-2; PS2167-3; PS2168-1; PS2168-3; PS2170-1; PS2170-2; PS2171-1; PS2171-2; PS2172-1; PS2172-3; PS2174-2; PS2174-4; PS2175-3; PS2175-4; PS2176-2; PS2176-4; PS2177-1; PS2177-3; PS2178-2; PS2178-4; PS2179-1; PS2179-3; PS2180-1; PS2181-3; PS2182-1; PS2182-4; PS2183-2; PS2183-3; PS2184-1; PS2184-3; PS2185-3; PS2185-4; PS2186-1; PS2186-3; PS2187-1; PS2187-5; PS2189-1; PS2189-3; PS2190-3; PS2190-5; PS2191-1; PS2192-1; PS2192-2; PS2193-2; PS2193-3; PS2194-1; PS2195-4; PS2196-2; PS2196-3; PS2198-1; PS2198-4; PS2199-4; PS2200-2; PS2200-4; PS2202-2; PS2202-4; PS2204-1; PS2204-3; PS2205-3; PS2206-1; PS2206-4; PS2208-1; PS2209-1; PS2210-1; PS2210-3; PS2212-5; PS2213-1; PS2213-4; PS2214-1; PS2214-4; PS2215-1; PS2215-2; Quaternary Environment of the Eurasian North; QUEEN; Svalbard; Yermak Plateau
    Type: Dataset
    Format: application/zip, 2 datasets
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  • 6
    facet.materialart.
    Unknown
    Age models and stable isotopes of sediment cores from the northern seas (1992)
    PANGAEA
    In:  Supplement to: Köhler, Sabine E I (1992): Spätquartäre paläo-ozeanographische Entwicklung des Nordpolarmeeres anhand von Sauerstoff- und Kohlenstoff-Isotopenverhältnissen der planktischen Foraminifere. GEOMAR Report, GEOMAR Research Center for Marine Geosciences, Christian Albrechts University in Kiel, 13, 104 pp
    Details
    Publication Date: 2024-07-01
    Description: Oxygen and carbon isotope measurements were carried out on tests of planktic foraminifers N. pachyderma (sin.) from eight sediment cores taken from the eastern Arctic Ocean, the Fram Strait, and the lceland Sea, in order to reconstruct Arctic Ocean and Norwegian-Greenland Sea circulation patterns and ice covers during the last 130,000 years. In addition, the influence of ice, temperature and salinity effects on the isotopic signal was quantified. Isotope measurements on foraminifers from sediment surface samples were used to elucidate the ecology of N. pachyderma (sin.). Changes in the oxygen and carbon isotope composition of N. pachyderma (sin.) from sediment surface samples document the horizontal and vertical changes of water mass boundaries controlled by water temperature and salinity, because N. pachyderma (sin.) shows drastic changes in depth habitats, depending on the water mass properties. It was able to be shown that in the investigated areas a regional and spatial apparent increase of the ice effect occurred. This happened especially during the termination I by direct advection of meltwaters from nearby continents or during the termination and in interglacials by supply of isotopically light water from rivers. A northwardly proceeding overprint of the 'global' ice effect, increasing from the Norwegian-Greenland Sea to the Arctic Ocean, was not able to be demonstrated. By means of a model the influence of temperature and salinity on the global ice volume signal during the last 130,000 years was recorded. In combination with the results of this study, the model was the basis for a reconstruction of the paleoceanographic development of the Arctic Ocean and the Norwegian-Greenland Sea during this time interval. The conception of a relatively thick and permanent sea ice cover in the Nordic Seas during glacial times should be replaced by the model of a seasonally and regionally highly variable ice cover. Only during isotope stage 5e may there have been a local deep water formation in the Fram Strait.
    Keywords: 49-08; 49-13; 49-14; 49-15; 49-18; 49-20; 49-39; 49-43; 49-50; 52-04; 52-09; 52-14; 52-24; 52-28; 52-30; 52-33; 52-37; 52-38; 57-04; 57-06; 57-07; 57-08; 57-09; 57-10; 57-11; 57-12; 57-13; 57-14; 57-20; 58-08; Antarctic Ocean; Arctic Ocean; ARK-I/3; ARK-II/4; ARK-II/5; ARK-IV/3; ARK-VII/1; BC; Box corer; BS88/6_10B; BS88/6_3; BS88/6_4; BS88/6_6; BS88/6_7; BS88/6_8; CTD/Rosette; CTD-RO; Fram Strait; GEOMAR; Giant box corer; GIK13123-1; GIK13124-1; GIK13131-1; GIK13138-1; GIK13140-3; GIK13147-1; GIK13150-1; GIK16129-1; GIK16130-1; GIK16132-1; GIK16136-1; GIK16141-1; GIK16142-1; GIK16144-1; GIK16911-1; GIK16916-1; GIK16917-1; GIK16921-1; GIK21513-9 PS11/276-9; GIK21515-10 PS11/280-10; GIK21519-11 PS11/296-11; GIK21520-10 PS11/310-10; GIK21522-19 PS11/358-19; GIK21523-15 PS11/362-15; GIK21524-1 PS11/364-1; GIK21525-2 PS11/365-2; GIK21525-3 PS11/365-3; GIK21527-10 PS11/371-10; GIK21528-7 PS11/372-7; GIK21529-7 PS11/376-7; GIK21533-3 PS11/412; GIK21534-6 PS11/423-6; GIK21535-5 PS11/430-5; GIK21535-8 PS11/430-8; GIK21845-2 PS17/010; GIK21852-1 PS17/018; GIK23037-2; GIK23038-3; GIK23039-3; GIK23040-3; GIK23041-1; GIK23042-1; GIK23043-1; GIK23055-2; GIK23056-2; GIK23057-2; GIK23058-1; GIK23059-2; GIK23061-3; GIK23062-3; GIK23064-2; GIK23065-2; GIK23066-2; GIK23067-2; GIK23068-2; GIK23069-2; GIK23071-2; GIK23072-2; GIK23074-3; GIK23215-1 PS03/215; GIK23227-1 PS05/412; GIK23228-1 PS05/413; GIK23229-1 PS05/414; GIK23230-1 PS05/416; GIK23231-1 PS05/417; GIK23233-1 PS05/420; GIK23235-1 PS05/422; GIK23237-1 PS05/425; GIK23238-1 PS05/426; GIK23239-1 PS05/427; GIK23240-1 PS05/428; GIK23241-1 PS05/429; GIK23242-1 PS05/430; GIK23243-1 PS05/431; GIK23244-1 PS05/449; GIK23247-1 PS05/452; GIK-cruise; GKG; Gravity corer (Kiel type); Håkon Mosby; Helmholtz Centre for Ocean Research Kiel; HM49; HM49-08; HM49-13; HM49-14; HM49-15; HM49-18; HM49-20; HM49-39; HM49-43; HM49-50; HM52; HM52-04; HM52-09; HM52-14; HM52-24; HM52-28; HM52-30; HM52-33; HM52-37; HM52-38; HM57; HM57-04; HM57-06; HM57-07; HM57-08; HM57-09; HM57-10; HM57-11; HM57-12; HM57-13; HM57-14; HM57-20; HM58; HM58-08; HM82/83; Iceland Sea; KAL; Kasten corer; KOL; Kolbeinsey Ridge; M107-1; M2/1; M2/2; Meteor (1986); Nansen Basin; Norwegian-Greenland Sea/off Iceland; Norwegian Sea; Piston corer (Kiel type); PO158/A; Polarstern; POS158/1; POS158/1-GEOM_01/1-GKG; POS158/1-GEOM_03/1-GKG; POS158/1-GEOM_04/1-GKG; POS158/1-GEOM_06/1-GKG; Poseidon; PS03; PS05; PS11; PS1126-1; PS1227-1; PS1228-1; PS1229-1; PS1230-1; PS1231-1; PS1233-1; PS1235-1; PS1237-1; PS1238-1; PS1239-1; PS1240-1; PS1241-1; PS1242-1; PS1243-1; PS1244-1; PS1247-1; PS1513-9; PS1515-10; PS1519-11; PS1520-10; PS1522-19; PS1523-15; PS1524-1; PS1525-2; PS1525-3; PS1527-10; PS1528-7; PS1529-7; PS1533-3; PS1534-6; PS1535-5; PS1535-8; PS17; PS1845-2; PS1852-1; Quaternary Environment of the Eurasian North; QUEEN; SL; Svalbard; Voering Plateau; Voring Plateau; Yermak Plateau
    Type: Dataset
    Format: application/zip, 31 datasets
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  • 7
    facet.materialart.
    Unknown
    Benthic foraminifera of surface sediments in the Arctic Ocean (1994)
    PANGAEA
    In:  Supplement to: Bergsten, Helene (1994): Recent benthic foraminifera of a transect from the North Pole to the Yermak Plateau, eastern central Arctic Ocean. Marine Geology, 119(3-4), 251-267, https://doi.org/10.1016/0025-3227(94)90184-8
    Details
    Publication Date: 2024-07-01
    Description: The Recent distribution of living and dead benthic foraminifera of the Arctic Ocean proper has been examined in surface sediments that were sampled during the International Arctic Ocean Expedition 1991 (Arctic 91). The samples represent the Amundsen and Nansen Basins, the Morris Jesup Rise, and the Yermak Plateau from 90°N to 79°42.4'N, 05°15.6'E. Due to the technical difficulties of deep-sea drilling in the Arctic Ocean these areas have, until now, been investigated only in very low density sampling. The Arctic 91 sites of this study cover a water depth range between 552 and 4375 m and represent three sites which are seasonally ice-free, although not yearly, while the other sites are characterized by permanent sea-ice. There is a Recent production of benthic foraminifera in the whole investigation area and all surface samples contain both benthic and planktonic foraminifera. Abyssal assemblages are recorded in the Amundsen and Nansen Basins where Stetsonia arctica dominates with high abundances. It is, however, also possible to distinguish these two basins by the use of diagnostic species. At intermediate water depths (500 to 2000-2500 m) the faunas show higher diversities and higher abundances of Atlantic species than the deep-sea sites. Mixing of North Atlantic water down to approximately 2500 m, is suggested to explain the influx of Atlantic species on the Yermak Plateau and the Morris Jesup Rise. The foraminiferal tests are well preserved within the investigation area and dissolution does not seem to be very obvious in the deeper areas. There is no evidence from the Recent foraminiferal faunas that the bottom waters of the eastern, central Arctic Ocean are undersaturated with respect to calcium carbonate and the deep-sea areas appear, therefore, to lie above the present CCD.
    Keywords: Amundsen Basin; ARK-VIII/3; AWI_Paleo; Giant box corer; GKG; Gravity corer (Kiel type); Morris Jesup Rise; Nansen Basin; Paleoenvironmental Reconstructions from Marine Sediments @ AWI; Polarstern; PS19/194; PS19/198; PS19/200; PS19/204; PS19/206; PS19/210; PS19/214; PS19/216; PS19/218; PS19/220; PS19/222; PS19/226; PS19/239; PS19/241; PS19/245; PS19/246; PS19/249; PS19/252; PS19 ARCTIC91; PS2190-2; PS2192-1; PS2193-2; PS2194-1; PS2195-4; PS2196-2; PS2198-1; PS2199-1; PS2200-2; PS2201-1; PS2202-1; PS2205-2; PS2209-1; PS2210-1; PS2212-1; PS2213-1; PS2214-1; PS2215-2; Quaternary Environment of the Eurasian North; QUEEN; SL; Yermak Plateau
    Type: Dataset
    Format: application/zip, 2 datasets
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  • 8
    facet.materialart.
    Unknown
    Stable oxygen and carbon isotope ratios of Neogloboquadrina pachyderma from Latest Pleistocene to Holocene sediments of the eastern central Arctic Ocean (1994)
    PANGAEA
    In:  Supplement to: Stein, Ruediger; Schubert, Carsten J; Vogt, Christoph; Fütterer, Dieter K (1994): Stable isotope stratigraphy, sedimentation rates, and salinity changes in the latest Pleistocene and Holocene eastern central Arctic Ocean. Marine Geology, 119(3-4), 333-355, https://doi.org/10.1016/0025-3227(94)90189-9
    Details
    Publication Date: 2024-07-01
    Description: A high-resolution study including oxygen and carbon stable isotopes as well as carbonate and total organic carbon contents, has been performed on undisturbed near-surface (0-40 cm) sediment sequences taken in the eastern Arctic Ocean during the international Arctic 91 Expedition. Based on the oxygen stable isotope records measured on Neogloboquadrina pachyderma (sin.) and AMS 14C dating, the upper 10 to 20 cm of the sediment sequences represent isotope stage 1, and the base of Termination I (15.7 ka) can be identified very well. Stage 1 sedimentation rates vary between 0.4 and 〉2.0 cm/kyr. In general, glacial stage 2 sedimentation rates are probably lower and vary between 0.4 and 0.7 cm/kyr. The glacial-interglacial shifts in delta18O values of N. pachyderma sin. may reach values of 1.3 to 2.5 per mil indicating (1) that, in addition to the glacial-interglacial global ice-volume signal, changes in surface-water salinity have effected the isotope records and (2) that these salinity changes have varied laterally. Glacial-interglacial differences in salinity were small in the Lomonosov Ridge area (0-0.4 per mil) and relatively high in the Morris-Jesup-Rise area (up to 1.4 per mil). This implies that the supply of low-saline waters onto the Eurasian shelves and its further transport into the central Arctic Ocean via the Transpolar Drift should have continued during the last glacial and should have significantly influenced the surface water characteristics in parts of the central Arctic. On the Morris-Jesup-Rise, on the other hand, the glacial low-saline-water signal at that time was strongly reduced in comparison to the modern situation. At the glacial-interglacial stage 1/2 boundary, a strong meltwater signal is recorded in a sharp depletion in delta18O as well as delta13C. This central Arctic Ocean meltwater event can be correlated from the Makarov Basin through the Lomonosov Ridge and Amundsen Basin to the eastern Gakkel Ridge. The beginning of this event is AMS 14C dated at 15.7 ka, i.e., significantly older than the major decrease in the global ice-volume signal which occurs between 9 and 13.5 ka. Large amounts of freshwater/meltwater were probably supplied from the Eurasian continent due to the decay of the Barents-Sea-Ice-Sheet, causing this distinct early meltwater anomaly in the central Arctic Ocean. The extension of a well-oxygenated surface-near water mass in the Arctic Ocean and (at least seasonal) open-ice conditions and some increased bioproductivity were probably established at the end of Termination I, as indicated by the increase in delta13C to modern values as well as increased carbonate (i.e., foraminifers, coccoliths, ostracodes) and total organic carbon contents.
    Keywords: Amundsen Basin; ARK-VIII/3; AWI_Paleo; Gakkel Ridge, Arctic Ocean; Giant box corer; GKG; Gravity corer (Kiel type); Lomonosov Ridge, Arctic Ocean; Makarov Basin; Morris Jesup Rise; MUC; MultiCorer; Nansen Basin; Paleoenvironmental Reconstructions from Marine Sediments @ AWI; Polarstern; PS19/152; PS19/154; PS19/157; PS19/159; PS19/165; PS19/172; PS19/175; PS19/176; PS19/178; PS19/185; PS19/186; PS19/194; PS19/198; PS19/200; PS19/210; PS19/214; PS19/218; PS19/222; PS19/224; PS19/226; PS19/228; PS19/234; PS19/241; PS19/245; PS19 ARCTIC91; PS2159-3; PS2161-1; PS2163-1; PS2165-5; PS2170-4; PS2175-4; PS2177-3; PS2178-4; PS2179-3; PS2184-3; PS2185-4; PS2190-5; PS2192-3; PS2193-2; PS2196-2; PS2198-4; PS2200-4; PS2202-2; PS2204-2; PS2204-3; PS2205-1; PS2206-4; PS2208-1; PS2210-3; PS2212-6; Quaternary Environment of the Eurasian North; QUEEN; SL; Yermak Plateau
    Type: Dataset
    Format: application/zip, 28 datasets
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  • 9
    facet.materialart.
    Unknown
    Macrobenthos composition, abundance and biomass in the Arctic Ocean (1994)
    PANGAEA
    In:  Supplement to: Kröncke, Ingrid (1994): Macrobenthos composition, abundance and biomass in the Arctic Ocean along a transect between Svalbard and the Makarov Basin. Polar Biology, 14(8), 519-529, https://doi.org/10.1007/BF00238221
    Details
    Publication Date: 2024-07-01
    Description: Macrofauna has been sampled at 30 stations, at water depths of 1018–4478 m, along a transect extending between Northern Svalbard and the Makarov Basin, as a basis for understanding aspects of the benthic ecology of the Arctic Ocean. Species numbers, abundances and biomasses were extremely low, and generally varied between 0 to 11/0.02 m**2, 0 to 850 individuals/m**2, and 0 to 82.65 g/m**2, respectively. A total of 42 species was found. The Amphipod Jassa marmorata was the most common species. Both numbers and biomasses of suspension-feeding species increased towards the Lomonosov Ridge, probably due to lateral transport of organic material by deep currents along the ridge.
    Keywords: Amundsen Basin; ARK-VIII/3; Gakkel Ridge, Arctic Ocean; Giant box corer; GKG; Lomonosov Ridge, Arctic Ocean; Makarov Basin; Nansen Basin; Polarstern; PS19/150; PS19/151; PS19/155; PS19/165; PS19/166; PS19/181; PS19/182; PS19/186; PS19 ARCTIC91; PS2157-7; PS2158-1; PS2159-7; PS2161-5; PS2162-1; PS2163-5; PS2164-7; PS2165-6; PS2166-4; PS2167-4; PS2168-4; PS2170-1; PS2171-1; PS2172-5; PS2174-7; PS2175-6; PS2176-7; PS2177-7; PS2178-6; PS2179-4; PS2180-1; PS2181-1; PS2182-6; PS2183-5; PS2184-4; PS2185-3; PS2185-8; PS2186-6; PS2187-6; PS2189-6; PS2190-6
    Type: Dataset
    Format: application/zip, 2 datasets
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  • 10
    facet.materialart.
    Unknown
    Stable isotope ratios on planktonic foraminifer N. pachyderma of surface sediments from the Arctic Ocean (Table 1) (1994)
    PANGAEA
    In:  Supplement to: Spielhagen, Robert F; Erlenkeuser, Helmut (1994): Stable oxygen and carbon isotopes in planktic foraminifers from Arctic Ocean surface sediments: Reflection of the low salinity surfac water layer. Marine Geology, 119(3-4), 227-250, https://doi.org/10.1016/0025-3227(94)90183-X
    Details
    Publication Date: 2024-07-01
    Description: Planktic foraminifers Neogloboquadrina pachyderma (sin.) from 87 eastern and central Arctic Ocean surface sediment samples were analyzed for stable oxygen and carbon isotope composition. Additional results from 52 stations were taken from the literature. The lateral distribution of delta18O (18O/16O) values in the Arctic Ocean reveals a pattern of roughly parallel, W-E stretching zones in the Eurasian Basin, each ~0.5 per mil wide on the delta18O scale. The low horizontal and vertical temperature variability in the Arctic halocline waters (0-100 m) suggests only little influence of temperature on the oxygen isotope distribution of N. pachyderma (sin.). The zone of maximum delta18O values of up to 3.8 per mil is situated in the southern Nansen Basin and relates to the tongue of saline (〉 33%.) Atlantic waters entering the Arctic Ocean through the Fram Strait. delta18O values decrease both to the Barents Shelf and to the North Pole, in accordance with the decreasing salinities of the halocline waters. In the Nansen Basin, a strong N-S delta18O gradient is in contrast with a relatively low salinity change and suggests contributions from different freshwater sources, i.e. salinity reduction from sea ice meltwater in the south and from light isotope waters (meteoric precipitation and river-runoff) in the northern part of the basin. North of the Gakkel Ridge, delta18O and salinity gradients are in good accordance and suggest less influence of sea ice melting processes. The delta13C (13C/12C) values of N. pachyderma (sin.) from Arctic Ocean surface sediment samples are generally high (0.75-0.95 per mil). Lower values in the southern Eurasian Basin appear to be related to the intrusion of Atlantic waters. The high delta13C values are evidence for well ventilated surface waters. Because the perennial Arctic sea ice cover largely prevents atmosphere-ocean gas exchange, ventilation on the seasonally open shelves must be of major importance. Lack of delta13C gradients along the main routes of the ice drift from the Siberian shelves to the Fram Strait suggests that primary production (i.e. CO2 consumption) does probably not change the CO2 budget of the Arctic Ocean significantly.
    Keywords: 125SGC; 83-101; 83-104; 83-106; 83-109; 83-110; 83-201; 83-202; 83-203; 83-204; 83-205; Alpha Ridge, Arctic Ocean; Amerasian Basin; Amundsen Basin; Antarctic Ocean; Arctic Ocean; ARK-III/3; ARK-IV/3; ARK-IX/4; ARK-VIII/2; ARK-VIII/3; Barents Sea; CESAR; CESAR_83-101; CESAR_83-104; CESAR_83-106; CESAR_83-109; CESAR_83-110; CESAR_83-201; CESAR_83-202; CESAR_83-203; CESAR_83-204; CESAR_83-205; D.St.A.2; DEPTH, sediment/rock; Elevation of event; Event label; FL-433; FL-523; Fram-I; FramI/4; FramI/7; FramII/1; FramII/3; FramII/4; FramII/5; FramIII/1; FramIII/2; FramIII/3; FramIII/7; FramIII/8; FramIV/1; FramIV/7; FramIV/9; Fram Strait; Gakkel Ridge, Arctic Ocean; GC; GEOMAR; Giant box corer; GIK21308-3 PS07/601; GIK21310-4 PS07/603; GIK21312-3 PS07/606; GIK21314-3 PS07/608; GIK21319-2 PS07/617; GIK21513-9 PS11/276-9; GIK21515-10 PS11/280-10; GIK21519-11 PS11/296-11; GIK21520-10 PS11/310-10; GIK21522-19 PS11/358-19; GIK21523-15 PS11/362-15; GIK21524-1 PS11/364-1; GIK21525-2 PS11/365-2; GIK21527-10 PS11/371-10; GIK21528-7 PS11/372-7; GIK21529-7 PS11/376-7; GIK21533-3 PS11/412; GIK21534-6 PS11/423-6; GKG; Gravity corer; Gravity corer (Kiel type); Helmholtz Centre for Ocean Research Kiel; Ice drift station; Laptev Sea; Laptev Sea, Taymyr Island; Latitude of event; Lomonosov Ridge, Arctic Ocean; Longitude of event; LOREX; LOREX1; LOREX10; LOREX11; LOREX2; LOREX3; LOREX6; LOREX8; LOREX9; Makarov Basin; Mass spectrometer Finnigan MAT 251; MIC; MiniCorer; Morris Jesup Rise; MUC; MultiCorer; Nansen Basin; Neogloboquadrina pachyderma sinistral, δ13C; Neogloboquadrina pachyderma sinistral, δ18O; Polarstern; PS07; PS11; PS1308-3; PS1310-4; PS1312-3; PS1314-3; PS1319-2; PS1513-9; PS1515-10; PS1519-11; PS1520-10; PS1522-19; PS1523-15; PS1524-1; PS1525-2; PS1527-10; PS1528-7; PS1529-7; PS1533-3; PS1534-6; PS19/111; PS19/113; PS19/114; PS19/148; PS19/150; PS19/152; PS19/154; PS19/155; PS19/157; PS19/158; PS19/159; PS19/160; PS19/161; PS19/164; PS19/165; PS19/166; PS19/167; PS19/171; PS19/172; PS19/173; PS19/175; PS19/176; PS19/178; PS19/181; PS19/182; PS19/183; PS19/184; PS19/185; PS19/186; PS19/189; PS19/190; PS19/192; PS19/194; PS19/198; PS19/200; PS19/204; PS19/206; PS19/210; PS19/214; PS19/216; PS19/218; PS19/222; PS19/226; PS19/228; PS19/234; PS19/239; PS19/241; PS19/245; PS19/246; PS19/249; PS19 ARCTIC91; PS19 EPOS II; PS2137-1; PS2139-1; PS2140-1; PS2156-1; PS2157-4; PS2159-4; PS2161-4; PS2162-1; PS2163-2; PS2164-4; PS2165-3; PS2166-2; PS2167-2; PS2168-1; PS2170-1; PS2171-1; PS2172-1; PS2174-4; PS2175-3; PS2176-4; PS2177-1; PS2178-2; PS2179-1; PS2180-1; PS2181-1; PS2181-2; PS2182-1; PS2183-1; PS2183-2; PS2184-1; PS2185-1; PS2185-3; PS2186-5; PS2187-1; PS2189-1; PS2190-3; PS2192-1; PS2193-2; PS2194-1; PS2195-4; PS2196-2; PS2198-1; PS2199-4; PS2200-2; PS2202-2; PS2205-3; PS2206-4; PS2208-1; PS2209-1; PS2210-1; PS2212-1; PS2212-5; PS2213-1; PS2214-1; PS2441-3; PS2442-4; PS2443-2; PS2444-1; PS2445-3; PS2446-3; PS2447-4; PS2449-3; PS2455-3; PS2456-2; PS2458-3; PS2459-2; PS2464-2; PS2465-3; PS2466-3; PS2468-3; PS2469-3; PS2470-4; PS2471-3; PS2472-3; PS2473-3; PS2474-2; PS2475-1; PS2476-3; PS2482-3; PS2483-2; PS2484-2; PS27; PS27/007; PS27/014; PS27/016; PS27/017; PS27/019; PS27/020; PS27/024; PS27/027; PS27/033; PS27/034; PS27/038; PS27/039; PS27/046; PS27/047; PS27/048; PS27/050; PS27/052; PS27/053; PS27/054; PS27/056; PS27/058; PS27/059; PS27/060; PS27/062; PS27/069; PS27/070; PS27/071; Quaternary Environment of the Eurasian North; QUEEN; Reference/source; Sampling/drilling from ice; Sampling/drilling ice; SL; Svalbard; T-3; T3-66; T3-67-11; T3-67-5; Y80_125SGC; Yermak Plateau; Ymer; YMER-80
    Type: Dataset
    Format: text/tab-separated-values, 330 data points
    Location Call Number Expected Availability
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