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  • PANGAEA  (101)
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  • 1
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    Stable isotope record of planktonic foraminifera of the Atlantic Ocean (2013)
    PANGAEA
    In:  Supplement to: Cléroux, Caroline; deMenocal, Peter B; Arbuszewski, Jennifer; Linsley, Braddock K (2013): Reconstructing the upper water column thermal structure in the Atlantic Ocean. Paleoceanography, 28(3), 503-516, https://doi.org/10.1002/palo.20050
    Details
    Publication Date: 2023-01-13
    Description: The thermal structure of the upper ocean (0-1000 m) is set by surface heat fluxes, shallow wind-driven circulation, and the deeper thermohaline circulation. Its long-term variability can be reconstructed using deep-dwelling planktonic foraminifera that record subsurface conditions. Here we used six species (Neogloboquadrina dutertrei, Globorotalia tumida, Globorotalia inflata, Globorotalia truncatulinoides, Globorotalia hirsuta, and Globorotalia crassaformis) from 66 core tops along a meridional transect spanning the mid-Atlantic (42°N to 25°S) to develop a method for reconstructing past thermocline conditions. We estimated the calcification depths from d18O measurements and the Mg/Ca-temperature relationships for each species. This systematic strategy over this large latitudinal section reveals distinct populations with different Mg/Ca-temperature relationships for G. inflata, G. truncatulinoides, and G. hirsuta in different areas. The calcification depths do not differ among the different populations, except for G. hirsuta, where the northern population calcifies much shallower than the southern population. N. dutertrei and G. tumida show a remarkably constant calcification depth independent of oceanographic conditions. The deepest dweller, G. crassaformis, apparently calcifies in the oxygen-depleted zone, where it may find refuge from predators and abundant aggregated matter to feed on. We found a good match between its calcification depth and the 3.2 ml/l oxygen level. The results of this multispecies, multiproxy study can now be applied down-core to facilitate the reconstruction of open-ocean thermocline changes in the past.
    Type: Dataset
    Format: application/zip, 4 datasets
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  • 2
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    (Table 1) Age determination on sediment core EW9303-GGC36
    PANGAEA
    Details
    Publication Date: 2023-05-12
    Keywords: AGE; Age, 14C milieu/reservoir corrected; Age, comment; Age, dated; Age, dated standard deviation; DEPTH, sediment/rock; EW9303-GGC36; GGC; Giant gravity corer
    Type: Dataset
    Format: text/tab-separated-values, 30 data points
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  • 3
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    (Table 3b) Carbon isotopic composition of n-alkanes and n-alkanoic acid biomarkers of terrestrial samples of Wargolo, Turkan Basin
    PANGAEA
    Details
    Publication Date: 2023-05-12
    Keywords: Kenya; Mass spectrometer Finnigan Delta Plus; n-Alkane C25, δ13C; n-Alkane C25, δ13C, standard deviation; n-Alkane C27, δ13C; n-Alkane C27, δ13C, standard deviation; n-Alkane C29, δ13C; n-Alkane C29, δ13C, standard deviation; n-Alkane C31, δ13C, standard deviation; n-Alkane C32, δ13C; n-Alkane C33, δ13C; n-Alkane C33, δ13C, standard deviation; n-Alkanoic acid C24, δ13C; n-Alkanoic acid C24, δ13C, standard deviation; n-Alkanoic acid C26, δ13C; n-Alkanoic acid C26, δ13C, standard deviation; n-Alkanoic acid C28, δ13C; n-Alkanoic acid C28, δ13C, standard deviation; n-Alkanoic acid C30, δ13C; n-Alkanoic acid C30, δ13C, standard deviation; n-Alkanoic acid C32, δ13C; n-Alkanoic acid C32, δ13C, standard deviation; n-Alkanoic acid C34, δ13C; n-Alkanoic acid C34, δ13C, standard deviation; OUTCROP; Outcrop sample; Sample code/label; SECTION, height; Wargolo; Δδ13C
    Type: Dataset
    Format: text/tab-separated-values, 67 data points
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  • 4
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    (Table A1) Stable carbon and oxygen isotope ratios of Cibicidoides wuellerstorfi from DSDP Site 68-502 in the Caribbean Sea
    PANGAEA
    Details
    Publication Date: 2023-06-27
    Keywords: 68-502_Site; AGE; Caribbean Sea/RIDGE; Cibicidoides wuellerstorfi, δ13C; Cibicidoides wuellerstorfi, δ18O; COMPCORE; Composite Core; Deep Sea Drilling Project; DEPTH, sediment/rock; DSDP; DSDP/ODP/IODP sample designation; Glomar Challenger; Leg68; Mass spectrometer Finnigan MAT 251; Sample code/label
    Type: Dataset
    Format: text/tab-separated-values, 603 data points
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  • 5
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    (Table B1) Age model of DSDP Hole 68-502B in the Caribbean Sea
    PANGAEA
    Details
    Publication Date: 2023-06-27
    Keywords: 68-502B; Age model; Age model, stable isotope stratigraphy; Caribbean Sea/RIDGE; Deep Sea Drilling Project; DEPTH, sediment/rock; DRILL; Drilling/drill rig; DSDP; Glomar Challenger; Leg68
    Type: Dataset
    Format: text/tab-separated-values, 56 data points
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  • 6
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    (Appendix 2) Compilation of mass accumulation rates from deep sea sediments during the last glacial maximum
    PANGAEA
    Details
    Publication Date: 2023-06-27
    Keywords: 0055PG; 0082PG; 0091PG; 115-708A; 280; 85-572_Site; 85-574; A150/180; A152-118; Accumulation rate, mass; Accumulation rate, non carbonate; AGE; Albatross IV (1963); APSARA2; APSARA4; AT_II-107_65; ATII_USA; Atlantic Ocean; Atlantis II (1963); BC; Box corer; Calcium carbonate; CH8X; CHN82-15; CHN82-20; COMPCORE; Composite Core; core_59; core_60; DRILL; Drilling/drill rig; Elevation of event; ELT45; ELT45.027-PC; ELT45.029-PC; ELT45.063-PC; ELT45.064-PC; ELT45.071-PC; ELT45.074-PC; ELT48; ELT48.006-PC; ELT48.022-PC; ELT48.027-PC; ELT48.029-PC; ELT49; ELT49.008-PC; ELT50; ELT50.013-PC; ELT50.017-PC; Eltanin; EN06601; EN066-10GGC; EN066-16GGC; EN066-17GGC; EN066-21GGC; EN066-23PG; EN066-24PG; EN066-26GGC; EN066-29GGC; EN066-32GGC; EN066-36GGC; EN066-39GGC; EN066-39PG; EN066-43GGC; EN066-44GGC; EN066-47PG; Endeavor; ERDC; ERDC-079BX; ERDC-092BX; ERDC-102BX; ERDC-129BX; Event label; GC; Glomar Challenger; Gravity corer; Jean Charcot; Joides Resolution; KN11002; Knorr; KNR110-55; KNR110-82; KNR110-91; KS7703; Latitude of event; Leg115; Leg85; Longitude of event; Marion Dufresne (1972); MD38; MD84-527; MD84-552; MD88-773; Melville; Method/Device of event; MN76-01, Pleiades; NODC-0418; North Pacific; North Pacific/TROUGH; Opal, biogenic silica; Pacific Ocean; PC; Piston corer; PLDS-130PG; PLDS-4; RC11; RC1112; RC11-120; RC11-170; RC11-209; RC11-210; RC11-76; RC12; RC12-225; RC12-294; RC12-412; RC12-413; RC12-416; RC12-63; RC12-65; RC12-66; RC13; RC13-113; RC13-227; RC13-228; RC13-229; RC13-254; RC13-259; RC13-271; RC14; RC14-106; RC14-35; RC15; RC15-93; RC15-94; RC17; RC17-69; RC17-98; RE5-036; Reference/source; Robert Conrad; SDSE_090; SDSE_092; Southern East Pacific Rise; South Indian Ocean; South Indian Ridge, South Indian Ocean; South Pacific; SwedishDeepSeaExpedition; Thomas Washington; V04; V04-1; V17; V17-165; V19; V19-185; V19-240; V22; V22-108; V22-174; V22-197; V23; V23-100; V24; V24-55; V24-58; V24-59; V24-62; V25; V25-59; V26; V26-176; V27; V27-263; V27-264; V27-265; V27-267; V29; V29-179; V29-48; V30; V30-40; V30-49; V30-88; V30-93; V30-97; V34; V34-53; Vema; W8402A; W8402A-14; W8803B; W8803B-51GC; Wecoma; Y70-5; Y70-5-64; Yaquina
    Type: Dataset
    Format: text/tab-separated-values, 430 data points
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  • 7
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    Biomarker records of DSDP Hole 24-231 and terrestrial sediments
    PANGAEA
    In:  Supplement to: Feakins, Sarah J; Eglinton, Timothy Ian; deMenocal, Peter B (2007): A comparison of biomarker records of northeast African vegetation from lacustrine and marine sediments (ca. 3.40 Ma). Organic Geochemistry, 38(10), 1607-1624, https://doi.org/10.1016/j.orggeochem.2007.06.008
    Details
    Publication Date: 2023-06-27
    Description: ntegrated terrestrial and marine records of northeast African vegetation are needed to provide long high resolution records of environmental variability with established links to specific terrestrial environments. In this study, we compare records of terrestrial vegetation preserved in marine sediments in the Gulf of Aden [Deep Sea Drilling Project (DSDP) Site 231] and an outcrop of lacustrine sediments in the Turkana Basin, Kenya, part of the East African Rift System. We analyzed higher plant biomarkers in sediments from both deposits of known equivalent age, corresponding to a ca. 50-100 ka humid interval prior to the b-Tulu Bor eruption ca. 3.40 Ma, when the Lokochot Lake occupied part of the Turkana Basin. Molecular abundance distributions indicate that long chain n-alkanoic acids in marine sediments are the most reliable proxy for terrestrial vegetation (Carbon Preference Index, CPI = 4.5), with more cautious interpretation needed for n-alkanes and lacustrine archives. Marine sediments record carbon isotopic variability in terrestrial biomarkers of 2-3 per mil, roughly equivalent to 20% variability in the C3/C4 vegetation contribution. The proportion of C4 vegetation apparently increased at times of low terrigenous dust input. Terrestrial sediments reveal much larger (2-10 per mil) shifts in n-alkanoic acid delta13C values. However, molecular abundance and isotopic composition suggest that microbial sources may also contribute fatty acids, contaminating the lacustrine sedimentary record of terrestrial vegetation.
    Keywords: 24-231; Deep Sea Drilling Project; DRILL; Drilling/drill rig; DSDP; Glomar Challenger; Indian Ocean/Gulf of Aden/BASIN; Kenya; Leg24; OUTCROP; Outcrop sample; Wargolo
    Type: Dataset
    Format: application/zip, 4 datasets
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  • 8
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    Age determination of sediment cores from the North Atlantic
    PANGAEA
    In:  Supplement to: Bond, Gerard C; Showers, William J; Cheseby, Maziet; Lotti, Rusty; Almasi, Peter; deMenocal, Peter B; Priore, Paul; Cullen, Heidi; Hajdas, Irka; Bonani, Georges (1997): A pervasive millennial-scale cycle in North Atlantic Holocene and gacial climates. Science, 278(5341), 1257-1266, https://doi.org/10.1126/science.278.5341.1257
    Details
    Publication Date: 2023-06-27
    Description: Evidence from North Atlantic deep sea cores reveals that abrupt shifts punctuated what is conventionally thought to have been a relatively stable Holocene climate. During each of these episodes, cool, ice-bearing waters from north of Iceland were advected as far south as the latitude of Britain. At about the same times, the atmospheric circulation above Greenland changed abruptly. Pacings of the Holocene events and of abrupt climate shifts during the last glaciation are statistically the same; together, they make up a series of climate shifts with a cyclicity close to 1470 +/- 500 years. The Holocene events, therefore, appear to be the most recent manifestation of a pervasive millennial-scale climate cycle operating independently of the glacial-interglacial climate state. Amplification of the cycle during the last glaciation may have been linked to the North Atlantic's thermohaline circulation.
    Keywords: EW9303-GGC36; GGC; Giant gravity corer; PC; Piston corer; V19; V19-30; V23; V23-81; V28; V28-14; V29; V29-191; Vema
    Type: Dataset
    Format: application/zip, 5 datasets
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  • 9
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    Stable isotope record of Cibicidoides wuellerstorfi from Pleistocene sediments of DSDP Site 86-502 in the Caribbean Sea
    PANGAEA
    In:  Supplement to: deMenocal, Peter B; Oppo, Delia W; Fairbanks, Richard G; Prell, Warren L (1992): Pleistocene d13C variability of North Atlantic intermediate water. Paleoceanography, 7(2), 229-250, https://doi.org/10.1029/92PA00420
    Details
    Publication Date: 2023-06-27
    Description: Variations in the stable isotopic composition of benthic foraminifera from Deep-Sea Drilling Project (DSDP) site 502B in the Caribbean Sea are used to reconstruct Atlantic intermediate water circulation variability over the last 1.2 m.y. Comparison of this record with other North Atlantic benthic isotope records indicates that Atlantic intermediate water circulation was relatively enhanced during glacial maxima when North Atlantic deep water (NADW) production was reduced. However, a simple, compensatory relationship between intermediate and deepwater circulation is not apparent. Geochemical models have shown that such changes in ocean circulation can affect atmospheric CO2 levels by changing vertical nutrient and alkalinity profiles. The Delta delta13C difference between Caribbean site 502B and deep equatorial Pacific site 677 is highly coherent and in phase with ice volume. Like the delta18O record, there is an increase in amplitude (40%) and a large increase in 100 kyr power after 0.7 Ma. The 1.2 per mil Delta delta13C amplitude scales to 70 ppm V in atmospheric CO2 using Boyle's (1986) box model result. The implied increase in CO2 amplitude after 0.7 Ma may suggest a positive feedback role in effecting the higher-amplitude climatic fluctuations which characterize the last 0.7 m.y.
    Keywords: 68-502_Site; 68-502B; Caribbean Sea/RIDGE; COMPCORE; Composite Core; Deep Sea Drilling Project; DRILL; Drilling/drill rig; DSDP; Glomar Challenger; Leg68
    Type: Dataset
    Format: application/zip, 2 datasets
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  • 10
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    (Table 3a) Carbon isotopic composition of n-alkanes and n-alkanoic acid biomarkers of DSDP Hole 24-231
    PANGAEA
    Details
    Publication Date: 2023-06-27
    Keywords: 24-231; AGE; Deep Sea Drilling Project; DEPTH, sediment/rock; DRILL; Drilling/drill rig; DSDP; DSDP/ODP/IODP sample designation; Glomar Challenger; Indian Ocean/Gulf of Aden/BASIN; Leg24; Mass spectrometer Finnigan Delta Plus; n-Alkane C25, δ13C; n-Alkane C25, δ13C, standard deviation; n-Alkane C27, δ13C; n-Alkane C27, δ13C, standard deviation; n-Alkane C29, δ13C; n-Alkane C29, δ13C, standard deviation; n-Alkane C31, δ13C, standard deviation; n-Alkane C32, δ13C; n-Alkane C33, δ13C; n-Alkane C33, δ13C, standard deviation; n-Alkanoic acid C24, δ13C; n-Alkanoic acid C24, δ13C, standard deviation; n-Alkanoic acid C26, δ13C; n-Alkanoic acid C26, δ13C, standard deviation; n-Alkanoic acid C28, δ13C; n-Alkanoic acid C28, δ13C, standard deviation; n-Alkanoic acid C30, δ13C; n-Alkanoic acid C30, δ13C, standard deviation; n-Alkanoic acid C32, δ13C; n-Alkanoic acid C32, δ13C, standard deviation; n-Alkanoic acid C34, δ13C; n-Alkanoic acid C34, δ13C, standard deviation; Sample code/label; Δδ13C
    Type: Dataset
    Format: text/tab-separated-values, 165 data points
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