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  • 1
    Online Resource
    Online Resource
    WTZ Zentralasien: CARIMA - Natürliche vs. Anthropogene Steuerungsfaktoren spätquartärer Monsunvariabilität in Zentralasien aufgezeichnet in marinen Archiven; TP1.1 - Paläoproduktivität und Veränderungen des Kohlenstoff- und Stickstoffkreislaufs: Schlussbericht (2014)
    Hamburg : Inst. of Biogeochemistry and Marine Chemistry, Univ.
    Details Availability
    Keywords: Forschungsbericht
    Type of Medium: Online Resource
    Pages: Online-Ressource (9 S., 74,89 KB)
    URL: https://edocs.tib.eu/files/e01fb15/837596025.pdf
    URL: https://doi.org/10.2314/GBV:837596025
    DOI: 10.2314/GBV:837596025
    Language: German
    Note: Förderkennzeichen BMBF 03G0806B. - Verbund-Nr. 01088026 , Engl. Berichtsbl. u.d.T.: CARIMA - Natural vs. anthropogenic controls of past monsoon variability in central Asia recorded in marine archives; TP1.1 - Palaeproductivity and changes of carbon- and nitrogen cycling , Unterschiede zwischen dem gedruckten Dokument und der elektronischen Ressource können nicht ausgeschlossen werden , Systemvoraussetzungen: Acrobat reader.
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  • 2
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    Sea surface temperature reconstruction for sediment cores SO90-39KG and SO130_275KL (2014)
    PANGAEA
    Details
    Publication Date: 2024-01-02
    Keywords: Age; AGE; Alkenone, unsaturation index UK'37; Arabian Sea; BCR; Box corer (Reineck); Calculated from UK'37 (Sonzogni et al., 1997); Calculated moving averages; DEPTH, sediment/rock; Event label; KL; MAKRAN 2; PAKOMIN; Piston corer (BGR type); Sea surface temperature, annual mean; SO130; SO130_275KL; SO90; SO90_39KG; Sonne
    Type: Dataset
    Format: text/tab-separated-values, 506 data points
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    DATA PANGAEA
  • 3
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    Sr/Ca ratios of sediment cores SO90-39KG and SO130_275KL (2014)
    PANGAEA
    Details
    Publication Date: 2024-01-02
    Keywords: Age; AGE; Calculated moving averages; DEPTH, sediment/rock; KL; MAKRAN 2; Piston corer (BGR type); SO130; SO130_275KL; Sonne; Strontium/Calcium ratio
    Type: Dataset
    Format: text/tab-separated-values, 1446 data points
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    DATA PANGAEA
  • 4
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    Distribution of planktic foraminifera of sediment core SO130-275KL (2015)
    PANGAEA
    Details
    Publication Date: 2024-01-02
    Keywords: Age; AGE; Beella digitata; Candeina nitida; Counting, foraminifera, planktic; Dentagloborotalia anfracta; DEPTH, sediment/rock; Globigerina bulloides; Globigerina falconensis; Globigerinella adamsi; Globigerinella calida; Globigerinella siphonifera; Globigerinita glutinata; Globigerinoides conglobatus; Globigerinoides ruber white; Globigerinoides sacculifer sacculifer; Globigerinoides sacculifer trilobus; Globoquadrina conglomerata; Globorotalia crassaformis; Globorotalia hirsuta; Globorotalia inflata; Globorotalia menardii; Globorotalia scitula; Globorotalia truncatulinoides dextral; Globorotalia truncatulinoides sinistral; Globorotalia tumida; Globorotaloides hexagonus; Globoturborotalita rubescens; Globoturborotalita tenella; Hastigerina pelagica; KL; MAKRAN 2; Neogloboquadrina dutertrei; Neogloboquadrina incompta; Neogloboquadrina pachyderma sinistral; Orbulina universa; Piston corer (BGR type); Pulleniatina obliquiloculata; SO130; SO130_275KL; Sonne; Specimen count; Sphaeroidinella dehiscens; Tenuitella iota; Tenuitella parkerae; Turborotalia humilis; Turborotalita quinqueloba; Δ depth
    Type: Dataset
    Format: text/tab-separated-values, 8619 data points
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    DATA PANGAEA
  • 5
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    Winter sea surface temperature reconstruction from planktic foraminiferal transfer functions of sediment core SO90-39KG (2015)
    PANGAEA
    Details
    Publication Date: 2024-01-02
    Keywords: Age; AGE; Arabian Sea; BCR; Box corer (Reineck); Bray-Curtis dissimilarities, minimum; DEPTH, sediment/rock; PAKOMIN; Principal component 1; Sea surface temperature, January-March; SO90; SO90_39KG; Sonne; Transfer Function Technique (TFT)
    Type: Dataset
    Format: text/tab-separated-values, 80 data points
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    DATA PANGAEA
  • 6
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    Planktonic foraminifera of sediment core M74/1b 944-6 (SL 163) (2017)
    PANGAEA
    Details
    Publication Date: 2024-01-02
    Keywords: AGE; Beella digitata; Candeina nitida; Counting 〉150 µm fraction; Dentagloborotalia anfracta; DEPTH, sediment/rock; Foraminifera, planktic; Foraminifera, planktic, other; Foraminifera, planktic indeterminata; Globigerina bulloides; Globigerina falconensis; Globigerinella adamsi; Globigerinella calida; Globigerinella siphonifera; Globigerinita glutinata; Globigerinoides conglobatus; Globigerinoides ruber white; Globigerinoides sacculifer sac; Globigerinoides sacculifer wo sac; Globoquadrina conglomerata; Globoquadrina hexagona; Globorotalia crassaformis; Globorotalia hirsuta; Globorotalia inflata; Globorotalia menardii; Globorotalia menardii flexuosa; Globorotalia scitula; Globorotalia theyeri; Globorotalia truncatulinoides dextral; Globorotalia truncatulinoides sinistral; Globorotalia tumida; Globoturborotalita rubescens; Globoturborotalita tenella; Gravity corer (Kiel type); M74/1b; M74/1b_944-6; Meteor (1986); Neogloboquadrina dutertrei; Neogloboquadrina incompta; Neogloboquadrina pachyderma sinistral; Oman Margin; Orbulina universa; Pulleniatina obliquiloculata; SL; SL 163; Sphaeroidinella dehiscens; Tenuitella iota; Turborotalita humilis; Turborotalita quinqueloba
    Type: Dataset
    Format: text/tab-separated-values, 5460 data points
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    DATA PANGAEA
  • 7
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    SST reconstruction for sediment core M74/1b_944-6 (SL 163) (2017)
    PANGAEA
    Details
    Publication Date: 2024-01-02
    Keywords: AGE; DEPTH, sediment/rock; Gravity corer (Kiel type); M74/1b; M74/1b_944-6; Meteor (1986); Oman Margin; Sea surface temperature, July-September; Sea surface temperature, standard error; SL; SL 163; Transfer function (Imbrie & Kipp, 1971, in Turekian, Yale Univ Press); Weighted averaging partial least squares (WA-PLS) regression
    Type: Dataset
    Format: text/tab-separated-values, 700 data points
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    DATA PANGAEA
  • 8
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    Decadal resolution record of sediment core M74/1b_944-6 (SL 163) (2017)
    PANGAEA
    In:  Supplement to: Munz, Philipp; Steinke, Stephan; Böll, Anna; Lückge, Andreas; Groeneveld, Jeroen; Kucera, Michal; Schulz, Hartmut (2017): Decadal resolution record of Oman upwelling indicates solar forcing of the Indian summer monsoon (9-6 ka). Climate of the Past, 13(5), 491-509, https://doi.org/10.5194/cp-13-491-2017
    Details
    Publication Date: 2024-01-02
    Description: The Indian summer monsoon (ISM) is an important conveyor in the ocean-atmosphere coupled system on a transregional scale. Here we present a study of a sediment core from the northern Oman margin, revealing early- to mid Holocene ISM conditions on a near 20-year resolution. We assess multiple independent proxies indicative of sea surface temperatures (SST) during the upwelling season together with bottom water conditions. We use geochemical parameters, transfer functions of planktic foraminiferal assemblages and Mg/Ca paleothermometry and find evidence corroborating previous studies that upwelling intensity varies significantly in coherence to solar sunspot cycles. The dominant ~80-90-year Gleissberg cycle was apparently also affecting bottom water oxygen conditions. Although the interval from 8.4 to 5.8 ka B.P. is relatively short, the gradually decreasing trend of summer monsoon conditions was interrupted by short events of intensified ISM conditions. Results from both independent SST proxies are linked to phases of weaker OMZ conditions and enhanced carbonate preservation. This indicates that atmospheric forcing was intimately linked to bottom water properties and state of the OMZ on decadal time scales.
    Keywords: Gravity corer (Kiel type); M74/1b; M74/1b_944-6; Meteor (1986); Oman Margin; SL; SL 163
    Type: Dataset
    Format: application/zip, 5 datasets
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    DATA PANGAEA
  • 9
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    Sea surface temperature and primary productivity reconstruction of sediment core SO130-275KL from the northeastern Arabian Sea during the late Holocene (2014)
    PANGAEA
    In:  Supplement to: Böll, Anna; Lückge, Andreas; Munz, Philipp; Forke, Sven; Schulz, Hartmut; Ramaswamy, Venkitasubramani; Rixen, Tim; Gaye, Birgit; Emeis, Kay-Christian (2014): Late Holocene primary productivity and sea surface temperature variations in the northeastern Arabian Sea: Implications for winter monsoon variability. Paleoceanography, 29(8), 778-794, https://doi.org/10.1002/2013PA002579
    Details
    Publication Date: 2024-01-02
    Description: Variability in the oceanic environment of the Arabian Sea region is strongly influenced by the seasonal monsoon cycle of alternating wind directions. Prominent and well studied is the summer monsoon, but much less is known about late Holocene changes in winter monsoon strength with winds from the northeast that drive convective mixing and high surface ocean productivity in the northeastern Arabian Sea. To establish a high-resolution record of winter monsoon variability for the late Holocene, we analyzed alkenone-derived sea surface temperature (SST) variations and proxies of primary productivity (organic carbon and d15N) in a well-laminated sediment core from the Pakistan continental margin. Weak winter monsoon intensities off Pakistan are indicated from 400 B.C. to 250 A.D. by reduced productivity and relatively high SST. At about 250 A.D., the intensity of the winter monsoon increased off Pakistan as indicated by a trend to lower SST. We infer that monsoon conditions were relatively unstable from ~500 to 1300 A.D., because primary production and SST were highly variable. Declining SST and elevated biological production from 1400 to 1900 A.D. suggest invigorated convective winter mixing by strengthening winter monsoon circulation, most likely a regional expression of colder climate conditions during the Little Ice Age on the Northern Hemisphere. The comparison of winter monsoon intensity with records of summer monsoon intensity suggests that an inverse relationship between summer and winter monsoon strength exists in the Asian monsoon system during the late Holocene, effected by shifts in the Intertropical Convergence Zone.
    Type: Dataset
    Format: application/zip, 5 datasets
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    DATA PANGAEA
  • 10
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    Planktic foraminifera abundances and winter SST reconstruction for sediment core SO90-39KG (2016)
    PANGAEA
    In:  Supplement to: Munz, Philipp; Lückge, Andreas; Siccha, Michael; Böll, Anna; Forke, Sven; Kucera, Michal; Schulz, Hartmut (2016): The Indian winter monsoon and its response to external forcing over the last two and a half centuries. Climate Dynamics, https://doi.org/10.1007/s00382-016-3403-1
    Details
    Publication Date: 2024-01-02
    Description: The Indian winter monsoon (IWM) is a key component of the seasonally changing monsoon system that affects the densely populated regions of South Asia. Cold winds originating in high northern latitudes provide a link of continental-scale Northern Hemisphere climate to the tropics. Western Disturbances (WD) associated with the IWM play a critical role for the climate and hydrology in northern India and the western Himalaya region. It is vital to understand the mechanisms and teleconnections that influence IWM variability to better predict changes in future climate. Here we present a study of regionally calibrated winter (January) temperatures and according IWM intensities, based on a planktic foraminiferal record with biennial (2.55 years) resolution. Over the last ~250 years, IWM intensities gradually weakened, based on the long-term trend of reconstructed January temperatures. Furthermore, the results indicate that IWM is connected on interannual- to decadal time scales to climate variability of the tropical and extratropical Pacific, via El Niño Southern Oscillation (ENSO) and Pacific Decadal Oscillation (PDO). However, our findings suggest that this relationship appeared to begin to decouple since the beginning of the 20th century. Cross-spectral analysis revealed that several distinct decadal-scale phases of colder climate and accordingly more intense winter monsoon centered at the years ~1800, ~1890 and ~1930 can be linked to changes of the North Atlantic Oscillation (NAO).
    Keywords: Arabian Sea; BCR; Box corer (Reineck); PAKOMIN; SO90; SO90_39KG; Sonne
    Type: Dataset
    Format: application/zip, 2 datasets
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    DATA PANGAEA
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