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  • 1
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    Beam attenuation coefficient data from Knipovich seamount station JC094-STN020 of the James Cook cruise JC094 (2021)
    PANGAEA
    Details
    Publikationsdatum: 2024-03-02
    Beschreibung: The radiogenic isotope ratio 231Pa/230Th of seawater and ocean sediments is a potentially powerful tool for tracing oceanic processes such as the ocean circulation and marine primary productivity. However, 231Pa/230Th reflects the combined signal of multiple controls associated with scavenging and oceanic transport, limiting its use as a paleo-proxy. Given that links between seawater and sedimentary 231Pa and 230Th distributions are crucial for understanding the cycling and removal fluxes of these nuclides, we carry out analysis of 231Pa and 230Th in both seawater (dissolved phase) and modern sediment samples acquired from five depth transects across the northern tropical Atlantic open ocean during the JC094 research expedition which took place in October-November 2013. Measurements of the radiogenic isotopes were performed using a MultiCollector-Inductively Coupled Plasma-Mass Spectrometer (MC-ICP-MS). In addition, CTD beam attenuation coefficient measurements and XRF scan Fe and Ti measurements of two sediment cores collected from the region during the same research expedition are presented to aid interpretation of 231Pa and 230Th data. Here we show the CTD beam attenuation coefficient data near the Knipovich Seamount.
    Schlagwort(e): beam attenuation coefficient; CTD; DEPTH, water; Event label; James Cook; JC094; JC094-STN020; Latitude of event; Longitude of event; Optical beam attenuation coefficient, particle in water column; Pa/Th; tropical Atlantic; TROPICS; XRF
    Materialart: Dataset
    Format: text/tab-separated-values, 4047 data points
    Standort Signatur Einschränkungen Verfügbarkeit
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    DATA PANGAEA
  • 2
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    Beam attenuation coefficient data from Vema ridge stations JC094-STN032 and JCO94-STN039 of the James Cook cruise JC094 (2021)
    PANGAEA
    Details
    Publikationsdatum: 2024-03-02
    Beschreibung: The radiogenic isotope ratio 231Pa/230Th of seawater and ocean sediments is a potentially powerful tool for tracing oceanic processes such as the ocean circulation and marine primary productivity. However, 231Pa/230Th reflects the combined signal of multiple controls associated with scavenging and oceanic transport, limiting its use as a paleo-proxy. Given that links between seawater and sedimentary 231Pa and 230Th distributions are crucial for understanding the cycling and removal fluxes of these nuclides, we carry out analysis of 231Pa and 230Th in both seawater (dissolved phase) and modern sediment samples acquired from five depth transects across the northern tropical Atlantic open ocean during the JC094 research expedition which took place in October-November 2013. Measurements of the radiogenic isotopes were performed using a MultiCollector-Inductively Coupled Plasma-Mass Spectrometer (MC-ICP-MS). In addition, CTD beam attenuation coefficient measurements and XRF scan Fe and Ti measurements of two sediment cores collected from the region during the same research expedition are presented to aid interpretation of 231Pa and 230Th data. Here we show the CTD beam attenuation coefficient data near the Vema Fracture Zone.
    Schlagwort(e): beam attenuation coefficient; CTD; DEPTH, water; Event label; James Cook; JC094; JC094-STN032; JC094-STN039; Latitude of event; Longitude of event; Optical beam attenuation coefficient, particle in water column; Pa/Th; tropical Atlantic; TROPICS; XRF
    Materialart: Dataset
    Format: text/tab-separated-values, 10069 data points
    Standort Signatur Einschränkungen Verfügbarkeit
    BibTip Andere fanden auch interessant ...
    DATA PANGAEA
  • 3
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    Beam attenuation coefficient data from Vayda ridge station JC094-STN044 of the James Cook cruise JC094 (2021)
    PANGAEA
    Details
    Publikationsdatum: 2024-03-02
    Beschreibung: The radiogenic isotope ratio 231Pa/230Th of seawater and ocean sediments is a potentially powerful tool for tracing oceanic processes such as the ocean circulation and marine primary productivity. However, 231Pa/230Th reflects the combined signal of multiple controls associated with scavenging and oceanic transport, limiting its use as a paleo-proxy. Given that links between seawater and sedimentary 231Pa and 230Th distributions are crucial for understanding the cycling and removal fluxes of these nuclides, we carry out analysis of 231Pa and 230Th in both seawater (dissolved phase) and modern sediment samples acquired from five depth transects across the northern tropical Atlantic open ocean during the JC094 research expedition which took place in October-November 2013. Measurements of the radiogenic isotopes were performed using a MultiCollector-Inductively Coupled Plasma-Mass Spectrometer (MC-ICP-MS). In addition, CTD beam attenuation coefficient measurements and XRF scan Fe and Ti measurements of two sediment cores collected from the region during the same research expedition are presented to aid interpretation of 231Pa and 230Th data. Here we show the CTD beam attenuation coefficient data near the Vayda Seamount.
    Schlagwort(e): beam attenuation coefficient; CTD; DEPTH, water; Event label; James Cook; JC094; JC094-STN044; Latitude of event; Longitude of event; Optical beam attenuation coefficient, particle in water column; Pa/Th; tropical Atlantic; TROPICS; XRF
    Materialart: Dataset
    Format: text/tab-separated-values, 4169 data points
    Standort Signatur Einschränkungen Verfügbarkeit
    BibTip Andere fanden auch interessant ...
    DATA PANGAEA
  • 4
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    Iron and titanium content of sediment cores from Carter Seamount station JC094-STN018 of the James Cook cruise JC094 (2021)
    PANGAEA
    Details
    Publikationsdatum: 2024-03-02
    Beschreibung: The radiogenic isotope ratio 231Pa/230Th of seawater and ocean sediments is a potentially powerful tool for tracing oceanic processes such as the ocean circulation and marine primary productivity. However, 231Pa/230Th reflects the combined signal of multiple controls associated with scavenging and oceanic transport, limiting its use as a paleo-proxy. Given that links between seawater and sedimentary 231Pa and 230Th distributions are crucial for understanding the cycling and removal fluxes of these nuclides, we carry out analysis of 231Pa and 230Th in both seawater (dissolved phase) and modern sediment samples acquired from five depth transects across the northern tropical Atlantic open ocean during the JC094 research expedition which took place in October-November 2013. Measurements of the radiogenic isotopes were performed using a MultiCollector-Inductively Coupled Plasma-Mass Spectrometer (MC-ICP-MS). In addition, CTD beam attenuation coefficient measurements and XRF scan Fe and Ti measurements of two sediment cores collected from the region during the same research expedition are presented to aid interpretation of 231Pa and 230Th data. Here we show the Fe and Ti XRF scan data of the sediment core acquired from the Carter Seamount.
    Schlagwort(e): beam attenuation coefficient; DEPTH, sediment/rock; Event label; GC; Gravity corer; Iron; James Cook; JC094; JC094-GVY01; JC094-STN018; Latitude of event; Longitude of event; Pa/Th; Titanium; tropical Atlantic; TROPICS; X-ray fluorescence ITRAX core scanner; XRF
    Materialart: Dataset
    Format: text/tab-separated-values, 994 data points
    Standort Signatur Einschränkungen Verfügbarkeit
    BibTip Andere fanden auch interessant ...
    DATA PANGAEA
  • 5
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    Iron and titanium content of sediment cores from Gramberg Seamount station JC094-STN059 of the James Cook cruise JC094 (2021)
    PANGAEA
    Details
    Publikationsdatum: 2024-03-02
    Beschreibung: The radiogenic isotope ratio 231Pa/230Th of seawater and ocean sediments is a potentially powerful tool for tracing oceanic processes such as the ocean circulation and marine primary productivity. However, 231Pa/230Th reflects the combined signal of multiple controls associated with scavenging and oceanic transport, limiting its use as a paleo-proxy. Given that links between seawater and sedimentary 231Pa and 230Th distributions are crucial for understanding the cycling and removal fluxes of these nuclides, we carry out analysis of 231Pa and 230Th in both seawater (dissolved phase) and modern sediment samples acquired from five depth transects across the northern tropical Atlantic open ocean during the JC094 research expedition which took place in October-November 2013. Measurements of the radiogenic isotopes were performed using a MultiCollector-Inductively Coupled Plasma-Mass Spectrometer (MC-ICP-MS). In addition, CTD beam attenuation coefficient measurements and XRF scan Fe and Ti measurements of two sediment cores collected from the region during the same research expedition are presented to aid interpretation of 231Pa and 230Th data. Here we show the the Fe and Ti XRF scan data of the sediment core acquired from the Gramberg Seamount.
    Schlagwort(e): beam attenuation coefficient; DEPTH, sediment/rock; Event label; GC; Gravity corer; Iron; James Cook; JC094; JC094-GVY14; JC094-STN059; Latitude of event; Longitude of event; Pa/Th; Titanium; tropical Atlantic; TROPICS; X-ray fluorescence ITRAX core scanner; XRF
    Materialart: Dataset
    Format: text/tab-separated-values, 990 data points
    Standort Signatur Einschränkungen Verfügbarkeit
    BibTip Andere fanden auch interessant ...
    DATA PANGAEA
  • 6
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    Tropical Atlantic seawater U-series of James Cook cruise JC094 (2021)
    PANGAEA
    Details
    Publikationsdatum: 2024-03-02
    Beschreibung: The radiogenic isotope ratio 231Pa/230Th of seawater and ocean sediments is a potentially powerful tool for tracing oceanic processes such as the ocean circulation and marine primary productivity. However, 231Pa/230Th reflects the combined signal of multiple controls associated with scavenging and oceanic transport, limiting its use as a paleo-proxy. Given that links between seawater and sedimentary 231Pa and 230Th distributions are crucial for understanding the cycling and removal fluxes of these nuclides, we carry out analysis of 231Pa and 230Th in both seawater (dissolved phase) and modern sediment samples acquired from five depth transects across the northern tropical Atlantic open ocean during the JC094 research expedition which took place in October-November 2013. Measurements of the radiogenic isotopes were performed using a MultiCollector-Inductively Coupled Plasma-Mass Spectrometer (MC-ICP-MS). In addition, CTD beam attenuation coefficient measurements and XRF scan Fe and Ti measurements of two sediment cores collected from the region during the same research expedition are presented to aid interpretation of 231Pa and 230Th data. Here we show the U-series dataset for the seawater samples.
    Schlagwort(e): beam attenuation coefficient; CTD; DEPTH, water; Event label; James Cook; JC094; JC094-STN002; JC094-STN019; JC094-STN020; JC094-STN027; JC094-STN032; JC094-STN039; JC094-STN044; JC094-STN061; LATITUDE; Location; LONGITUDE; MEGAC; MegaCorer; Multi-collector inductively coupled plasma mass spectrometer (MC-ICP-MS); Pa/Th; Protactinium-231/Thorium-230 excess, decay-corrected; Protactinium-231/Thorium-230 excess, decay-corrected, error; Protactinium-231 excess, decay-corrected; Protactinium-231 excess, decay-corrected, error; Sample ID; Thorium-230 excess, decay-corrected; Thorium-230 excess, decay-corrected, error; Thorium-232; Thorium-232, error; tropical Atlantic; TROPICS; Uranium-238; Uranium-238, error; XRF
    Materialart: Dataset
    Format: text/tab-separated-values, 240 data points
    Standort Signatur Einschränkungen Verfügbarkeit
    BibTip Andere fanden auch interessant ...
    DATA PANGAEA
  • 7
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    230Th global thorium database (2020)
    PANGAEA
    Details
    Publikationsdatum: 2024-03-02
    Beschreibung: In this dataset we present a global compilation of over 1000 sedimentary records of 230Th from across the global ocean at two time slices, the Late Holocene (0-5000 years ago, or 0-5 ka) and the Last Glacial Maximum (18.5-23.5 ka). Data have been screened for age control, errors, and lithogenic corrections. Overall quality levels were computed by summing each record's scores on the individual criteria. A record is optimal if it is based on a chronology that is constrained by δ18O or 14C and it provides both the raw nuclide concentrations and the associated errors. About one quarter of the records in the database achieved this highest quality level. The large majority of the records in the database are good, passing two of the three criteria, while the remaining quarter are of fair or poor quality.
    Schlagwort(e): Comment; DEPTH, water; Distance; Flag; Focusing factor; GEOTRACES; Global marine biogeochemical cycles of trace elements and their isotopes; Identification; LATITUDE; LONGITUDE; Ocean; ORDINAL NUMBER; Quality level; Ratio; Reference/source; Thorium-230 excess, decay-corrected; Total sediment, flux; Uranium/Thorium ratio
    Materialart: Dataset
    Format: text/tab-separated-values, 15667 data points
    Standort Signatur Einschränkungen Verfügbarkeit
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    DATA PANGAEA
  • 8
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    Tropical Atlantic sediment U-series of James Cook cruise JC094 (2021)
    PANGAEA
    Details
    Publikationsdatum: 2024-03-02
    Beschreibung: The radiogenic isotope ratio 231Pa/230Th of seawater and ocean sediments is a potentially powerful tool for tracing oceanic processes such as the ocean circulation and marine primary productivity. However, 231Pa/230Th reflects the combined signal of multiple controls associated with scavenging and oceanic transport, limiting its use as a paleo-proxy. Given that links between seawater and sedimentary 231Pa and 230Th distributions are crucial for understanding the cycling and removal fluxes of these nuclides, we carry out analysis of 231Pa and 230Th in both seawater (dissolved phase) and modern sediment samples acquired from five depth transects across the northern tropical Atlantic open ocean during the JC094 research expedition which took place in October-November 2013. Measurements of the radiogenic isotopes were performed using a MultiCollector-Inductively Coupled Plasma-Mass Spectrometer (MC-ICP-MS). In addition, CTD beam attenuation coefficient measurements and XRF scan Fe and Ti measurements of two sediment cores collected from the region during the same research expedition are presented to aid interpretation of 231Pa and 230Th data. Here we show the U-series dataset for the sediment samples.
    Schlagwort(e): BC; beam attenuation coefficient; Box corer; DEPTH, water; Event label; James Cook; JC094; JC094-STN008; JC094-STN011; JC094-STN015; JC094-STN019; JC094-STN021; JC094-STN022; JC094-STN026; JC094-STN027; JC094-STN041; JC094-STN042; JC094-STN046; JC094-STN048; JC094-STN049; JC094-STN053; JC094-STN056; JC094-STN058; JC094-STN061; LATITUDE; Location; LONGITUDE; MEGAC; MegaCorer; Multi-collector inductively coupled plasma mass spectrometer (MC-ICP-MS); Pa/Th; Protactinium-231/Thorium-230 excess, decay-corrected; Protactinium-231/Thorium-230 excess, decay-corrected, error; Protactinium-231 excess, decay-corrected; Protactinium-231 excess, decay-corrected, error; Remote operated vehicle; ROV; ROV225; ROV227; ROV228; ROV229; ROV230; ROV232; ROV233; ROV236; ROV237; ROV239; ROV240; Sample ID; Thorium-230 excess, decay-corrected; Thorium-230 excess, decay-corrected, error; Thorium-232; Thorium-232, error; tropical Atlantic; TROPICS; Uranium-238; Uranium-238, error; XRF
    Materialart: Dataset
    Format: text/tab-separated-values, 240 data points
    Standort Signatur Einschränkungen Verfügbarkeit
    BibTip Andere fanden auch interessant ...
    DATA PANGAEA
  • 9
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    Beam attenuation coefficient data from Carter Seamount station JC094-STN002 of the James Cook cruise JC094 (2021)
    PANGAEA
    Details
    Publikationsdatum: 2024-03-02
    Beschreibung: The radiogenic isotope ratio 231Pa/230Th of seawater and ocean sediments is a potentially powerful tool for tracing oceanic processes such as the ocean circulation and marine primary productivity. However, 231Pa/230Th reflects the combined signal of multiple controls associated with scavenging and oceanic transport, limiting its use as a paleo-proxy. Given that links between seawater and sedimentary 231Pa and 230Th distributions are crucial for understanding the cycling and removal fluxes of these nuclides, we carry out analysis of 231Pa and 230Th in both seawater (dissolved phase) and modern sediment samples acquired from five depth transects across the northern tropical Atlantic open ocean during the JC094 research expedition which took place in October-November 2013. Measurements of the radiogenic isotopes were performed using a MultiCollector-Inductively Coupled Plasma-Mass Spectrometer (MC-ICP-MS). In addition, CTD beam attenuation coefficient measurements and XRF scan Fe and Ti measurements of two sediment cores collected from the region during the same research expedition are presented to aid interpretation of 231Pa and 230Th data. Here we show the CTD beam attenuation coefficient data near the Carter Seamount.
    Schlagwort(e): beam attenuation coefficient; CTD; DEPTH, water; Event label; James Cook; JC094; JC094-STN002; Latitude of event; Longitude of event; Optical beam attenuation coefficient, particle in water column; Pa/Th; tropical Atlantic; TROPICS; XRF
    Materialart: Dataset
    Format: text/tab-separated-values, 4515 data points
    Standort Signatur Einschränkungen Verfügbarkeit
    BibTip Andere fanden auch interessant ...
    DATA PANGAEA
  • 10
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    230 Th normalization: New insights on an essential tool for quantifying sedimentary fluxes in the modern and Quaternary ocean (2020)
    In:  EPIC3Paleoceanography and Paleoclimatology, ISSN: 2572-4517
    Details
    Publikationsdatum: 2020-02-26
    Beschreibung: 230Th‐normalization is a valuable paleoceanographic tool for reconstructing high‐resolution sediment fluxes during the late Pleistocene (last ~500,000 years). As its application has expanded to ever more diverse marine environments, the nuances of 230Th systematics, with regards to particle type, particle size, lateral advective/diffusive redistribution, and other processes, have emerged. We synthesized over 1000 sedimentary records of 230Th from across the global ocean at two time slices, the Late Holocene (0‐5000 years ago, or 0‐5 ka) and the Last Glacial Maximum (18.5‐23.5 ka), and investigated the spatial structure of 230Th‐normalized mass fluxes. On a global scale, sedimentary mass fluxes were significantly higher during the Last Glacial Maximum (1.79‐2.17 g/cm2kyr, 95% confidence) relative to the Holocene (1.48‐1.68 g/cm2kyr, 95% confidence). We then examined the potential confounding influences of boundary scavenging, nepheloid layers, hydrothermal scavenging, size dependent sediment fractionation, and carbonate dissolution on the efficacy of 230Th as a constant flux proxy. Anomalous 230Th behavior is sometimes observed proximal to hydrothermal ridges and in continental margins where high particle fluxes and steep continental slopes can lead to the combined effects of boundary scavenging and nepheloid interference. Notwithstanding these limitations, we found that 230Th‐normalization is a robust tool for determining sediment mass accumulation rates in the majority of pelagic marine settings (〉 1000 m water depth).
    Repository-Name: EPIC Alfred Wegener Institut
    Materialart: Article , isiRev
    Standort Signatur Einschränkungen Verfügbarkeit
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    ARTIKEL (OA)
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