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  • Bay of Bengal  (2)
  • -; 321-U1338; AGE; Calcium (peak area); Calcium carbonate; Calculated; COMPCORE; Composite Core; Depth, composite; DEPTH, sediment/rock; DSDP/ODP/IODP sample designation; Estimated; Exp321; Integrated Ocean Drilling Program / International Ocean Discovery Program; Intercore correlation; IODP; Joides Resolution; log-Silicon/Titanium ratio; log-Titanium/Calcium ratio; Pacific Equatorial Age Transect II / Juan de Fuca; Sample code/label; Silicon (peak area); Titanium (peak area); X-ray fluorescence (XRF)  (1)
  • -; Alkenone, Ep; Alkenone, unsaturation index UK37; Alkenone C37:2, δ13C; Amazon Fan; Angola Basin; Brazil Basin; Calculated; Cape Basin; Carbon dioxide, total; DEPTH, sediment/rock; Elevation of event; Equatorial Atlantic; Event label; Gas chromatography; GeoB; GeoB1008-6; GeoB1016-3; GeoB1028-4; GeoB1032-2; GeoB1041-1; GeoB1105-3; GeoB1117-3; GeoB1214-2; GeoB1413-1; GeoB1501-1; GeoB1503-2; GeoB1505-3; GeoB1508-1; GeoB1515-2; GeoB1703-5; GeoB1706-1; GeoB1710-2; GeoB1711-5; GeoB1712-2; GeoB1713-6; GeoB1719-5; GeoB1903-1; GeoB2102-1; GeoB2109-3; GeoB2125-2; GeoB2204-1; GeoB2215-8; GeoB3117-3; GeoB3603-1; Geosciences, University of Bremen; Giant box corer; GIK17843-1; GKG; Gravity corer (Kiel type); JOPSII-6; Latitude of event; Longitude of event; M12/1; M16/1; M16/2; M20/2; M23/2; M23/3; M34/1; M6/6; M9/4; Mass spectrometer Finnigan MAT 252; Meteor (1986); Mid Atlantic Ridge; MUC; MultiCorer; Namibia Continental Margin; NE-Brazilian continental margin; Nitrate; off Kunene; Phosphate; Sea surface temperature, annual mean; SL; SO84; Sonne; Southern Cape Basin; ST. HELENA HOTSPOT; Victor Hensen; Walvis Ridge; West Angola Basin  (1)
  • 130-806; 184-1143; 184-1146; AGE; CALYPSO; CALYPSO2; Calypso Corer; Calypso Corer II; COMPCORE; Composite Core; DEPTH, sediment/rock; Elevation of event; Event label; Giant box corer; GIK17927-1; GIK17928-2; GIK17950-2; GIK17954-3; GIK17957-2; GIK18267-2; GIK18459-3; GIK18460-3; GIK18462-3; GIK18473-2; GIK18475-3; GIK18476-2; GIK18477-4; GIK18500-3; GIK18506-2; GIK18507-3; GKG; Globigerinoides ruber white, Magnesium/Calcium ratio; Globigerinoides ruber white, δ18O; Gravity corer (Kiel type); Gravity corer GEOMAR; IMAGES III - IPHIS; IMAGES IV-IPHIS III; IMAGES XIV - MARCO POLO 2; Indian Ocean; Joides Resolution; KAL; Kasten corer; KL; Latitude of event; Leg130; Leg184; Longitude of event; Marion Dufresne (1995); MD06-3067; MD106; MD111; MD155; MD972138; MD97-2138; MD972141; MD97-2141; MD982162; MD98-2162; MD982176; MD98-2176; Mindanao; MONITOR MONSUN; North Pacific Ocean; Ocean Drilling Program; ODP; Piston corer (BGR type); Pulleniatina obliquiloculata, Magnesium/Calcium ratio; Pulleniatina obliquiloculata, δ18O; Reference/source; SL; SL_G; SO115; SO115_20; SO185; SO95; Sonne; South China Sea; SUNDAFLUT; Sunda Shelf; Timeslice; Timor Sea; VITAL  (1)
Collection
Keywords
Publisher
Language
Years
  • 1
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    Variability of the Indian Monsoon in the Andaman Sea Across the Miocene-Pliocene Transition (2021)
    Details
    Publication Date: 2021-10-07
    Description: We reconstructed the variability of the Earth's strongest hydrological system, the Indian monsoon, over the interval 6.24 to 4.91 Ma at International Ocean Discovery Program (IODP) Expedition 353 Site U1448 in the Andaman Sea. We integrated high-resolution benthic and planktic foraminiferal carbon and oxygen isotopes with Mg/Ca measurements of the mixed layer foraminifer Trilobatus sacculifer to reconstruct the isotopic composition of seawater (δ18Osw) and the gradient between planktic and benthic foraminiferal δ13C. A prominent increase in mixed layer temperatures of ~4°C occurred between 5.55 and 5.28 Ma, accompanied by a change from precession- to obliquity-driven variability in planktic δ18O and δ18Osw. We suggest that an intensified cross-equatorial transport of heat and moisture, paced by obliquity, led to increased summer monsoon precipitation during warm stages after 5.55 Ma. Transient cold stages were characterized by reduced mixed layer temperatures and summer monsoon failure, thus resembling late Pleistocene stadials. In contrast, an overall cooler background climate state with a strengthened biological pump prevailed prior to 5.55 Ma. These findings highlight the importance of internal feedback processes for the long-term evolution of the Indian monsoon.
    Keywords: 551.6 ; Indian monsoon ; Miocene-Pliocene transition ; Bay of Bengal ; Mg/Ca paleothermometry ; stable isotopes ; orbital forcing
    Language: English
    Type: map
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    CITATION GEO-LEO
  • 2
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    An ~130 kyr Record of Surface Water Temperature and δ18O From the Northern Bay of Bengal: Investigating the Linkage Between Heinrich Events and Weak Monsoon Intervals in Asia (2021)
    Details
    Publication Date: 2021-10-15
    Description: Millennial-scale reductions in monsoon precipitation, so-called Weak Monsoon Intervals (WMIs), have been identified in numerous paleoclimate records across the Afro-Asian monsoon domain throughout the last glacial-interglacial cycle. These are considered the regional response to cooling during Heinrich events in the North Atlantic realm and several mechanisms have been suggested to explain this hemisphere-scale climatic teleconnection. In particular, reductions in Indian Ocean sea surface temperature (SST) have been proposed as the linking element between Heinrich events and WMIs. However, the validity of this relationship has only been demonstrated for the last ~20 kyr, leaving unresolved whether it also holds on longer time scales. Here we present a new paired record of planktonic foraminifera-based δ18Osw-ivc and UK'37-based SST from the northern Bay of Bengal, covering the last ~130 kyr. The δ18Osw-ivc record clearly reflects orbitally paced changes of Indian Summer Monsoon intensity superimposed by centennial- to millennial-scale WMIs that occurred synchronously to North Atlantic Heinrich events. Comparison with the UK'37-based SST reconstruction reveals, however, that WMIs in most cases were not paralleled by ocean surface cooling, questioning whether Indian Ocean SST lowering was the linking element between Heinrich events and reductions in monsoon precipitation in Asia also during the last glacial period.
    Keywords: 551 ; Indian Summer Monsoon ; Weak Monsoon Intervals ; marine sediments ; Bay of Bengal ; foraminifera oxygen isotopes ; UK'37 sea surface temperature
    Language: English
    Type: map
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    CITATION GEO-LEO
  • 3
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    Geochemistry of IODP Site 321-U1338 (2014)
    PANGAEA
    Details
    Publication Date: 2023-07-10
    Keywords: -; 321-U1338; AGE; Calcium (peak area); Calcium carbonate; Calculated; COMPCORE; Composite Core; Depth, composite; DEPTH, sediment/rock; DSDP/ODP/IODP sample designation; Estimated; Exp321; Integrated Ocean Drilling Program / International Ocean Discovery Program; Intercore correlation; IODP; Joides Resolution; log-Silicon/Titanium ratio; log-Titanium/Calcium ratio; Pacific Equatorial Age Transect II / Juan de Fuca; Sample code/label; Silicon (peak area); Titanium (peak area); X-ray fluorescence (XRF)
    Type: Dataset
    Format: text/tab-separated-values, 32193 data points
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    DATA PANGAEA
  • 4
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    (Table S2) Oxygen isotopes and uncorrected Mg/Ca ratios in Holocene last glacial maximum samples of the Indo-Pacific (2014)
    PANGAEA
    Details
    Publication Date: 2024-07-01
    Keywords: 130-806; 184-1143; 184-1146; AGE; CALYPSO; CALYPSO2; Calypso Corer; Calypso Corer II; COMPCORE; Composite Core; DEPTH, sediment/rock; Elevation of event; Event label; Giant box corer; GIK17927-1; GIK17928-2; GIK17950-2; GIK17954-3; GIK17957-2; GIK18267-2; GIK18459-3; GIK18460-3; GIK18462-3; GIK18473-2; GIK18475-3; GIK18476-2; GIK18477-4; GIK18500-3; GIK18506-2; GIK18507-3; GKG; Globigerinoides ruber white, Magnesium/Calcium ratio; Globigerinoides ruber white, δ18O; Gravity corer (Kiel type); Gravity corer GEOMAR; IMAGES III - IPHIS; IMAGES IV-IPHIS III; IMAGES XIV - MARCO POLO 2; Indian Ocean; Joides Resolution; KAL; Kasten corer; KL; Latitude of event; Leg130; Leg184; Longitude of event; Marion Dufresne (1995); MD06-3067; MD106; MD111; MD155; MD972138; MD97-2138; MD972141; MD97-2141; MD982162; MD98-2162; MD982176; MD98-2176; Mindanao; MONITOR MONSUN; North Pacific Ocean; Ocean Drilling Program; ODP; Piston corer (BGR type); Pulleniatina obliquiloculata, Magnesium/Calcium ratio; Pulleniatina obliquiloculata, δ18O; Reference/source; SL; SL_G; SO115; SO115_20; SO185; SO95; Sonne; South China Sea; SUNDAFLUT; Sunda Shelf; Timeslice; Timor Sea; VITAL
    Type: Dataset
    Format: text/tab-separated-values, 2184 data points
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    DATA PANGAEA
  • 5
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    Delta 13C measured on alkenones of surface sediment samples GeoB1008-6 to GeoB3603-1 from the South Atlantic (2002)
    PANGAEA
    In:  Supplement to: Benthien, Albert; Andersen, Nils; Schulte, Sonja; Müller, Peter J; Schneider, Ralph R; Wefer, Gerold (2002): Carbon isotopic composition of the C37:2 alkenone in core-top sediments of the South Atlantic Ocean: Effects of CO2 and nutrient concentrations. Global Biogeochemical Cycles, 16(1), 1012, https://doi.org/10.1029/2001GB001433
    Details
    Publication Date: 2024-07-01
    Description: We have analyzed the stable carbon isotopic composition of the diunsaturated C37 alkenone in 29 surface sediments from the equatorial and South Atlantic Ocean. Our study area covers different oceanographic settings, including sediments from the major upwelling regions off South Africa, the equatorial upwelling, and the oligotrophic western South Atlantic. In order to examine the environmental influences on the sedimentary record the alkenone-based carbon isotopic fractionation (Ep) values were correlated with the overlying surface water concentrations of aqueous CO2 ([CO2(aq)]), phosphate, and nitrate. We found Ep positively correlated with 1/[CO2(aq)] and negatively correlated with [PO43-] and [NO3-]. However, the relationship between Ep and 1/[CO2(aq)] is opposite of what is expected from a [CO2(aq)] controlled, diffusive uptake model. Instead, our findings support the theory of Bidigare et al. (1997, doi:10.1029/96GB03939) that the isotopic fractionation in haptophytes is related to nutrient-limited growth rates. The relatively high variability of the Ep-[PO4] relationship in regions with low surface water nutrient concentrations indicates that here other environmental factors also affect the isotopic signal. These factors might be variations in other growth-limiting resources such as light intensity or micronutrient concentrations.
    Keywords: -; Alkenone, Ep; Alkenone, unsaturation index UK37; Alkenone C37:2, δ13C; Amazon Fan; Angola Basin; Brazil Basin; Calculated; Cape Basin; Carbon dioxide, total; DEPTH, sediment/rock; Elevation of event; Equatorial Atlantic; Event label; Gas chromatography; GeoB; GeoB1008-6; GeoB1016-3; GeoB1028-4; GeoB1032-2; GeoB1041-1; GeoB1105-3; GeoB1117-3; GeoB1214-2; GeoB1413-1; GeoB1501-1; GeoB1503-2; GeoB1505-3; GeoB1508-1; GeoB1515-2; GeoB1703-5; GeoB1706-1; GeoB1710-2; GeoB1711-5; GeoB1712-2; GeoB1713-6; GeoB1719-5; GeoB1903-1; GeoB2102-1; GeoB2109-3; GeoB2125-2; GeoB2204-1; GeoB2215-8; GeoB3117-3; GeoB3603-1; Geosciences, University of Bremen; Giant box corer; GIK17843-1; GKG; Gravity corer (Kiel type); JOPSII-6; Latitude of event; Longitude of event; M12/1; M16/1; M16/2; M20/2; M23/2; M23/3; M34/1; M6/6; M9/4; Mass spectrometer Finnigan MAT 252; Meteor (1986); Mid Atlantic Ridge; MUC; MultiCorer; Namibia Continental Margin; NE-Brazilian continental margin; Nitrate; off Kunene; Phosphate; Sea surface temperature, annual mean; SL; SO84; Sonne; Southern Cape Basin; ST. HELENA HOTSPOT; Victor Hensen; Walvis Ridge; West Angola Basin
    Type: Dataset
    Format: text/tab-separated-values, 249 data points
    Location Call Number Expected Availability
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    DATA PANGAEA
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