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  • 2020-2024  (32)
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  • 1
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    Authigenic Formation of Clay Minerals in the Abyssal North Pacific (2022)
    Details
    Publication Date: 2023-07-19
    Description: Present estimates of the biogeochemical cycles of calcium, strontium, and potassium in the ocean reveal large imbalances between known input and output fluxes. Using pore fluid, incubation, and solid sediment data from North Pacific multi‐corer cores we show that, contrary to the common paradigm, the top centimeters of abyssal sediments can be an active site of authigenic precipitation of clay minerals. In this region, clay authigenesis is the dominant sink for potassium and strontium and consumes nearly all calcium released from benthic dissolution of calcium carbonates. These observations support the idea that clay authigenesis occurring over broad regions of the world ocean may be a major buffer for ocean chemistry on the time scale of the ocean overturning circulation, and key to the long‐term stability of Earth's climate.
    Description: Key Points: North Pacific red clay sediments are a sink for marine calcium, strontium, and potassium. Authigenic formation of clay minerals is prevalent in pelagic sediments throughout the North Pacific. The main mechanism for clay formation is recrystallization of aluminosilicates, neoformation can occur in biogenic silica rich sediments.
    Description: EC H2020 PRIORITY “Excellent science” H2020 European Research Council http://dx.doi.org/10.13039/100010663
    Description: Blavatnik Family Foundation http://dx.doi.org/10.13039/100011643
    Description: Isaac Newton Trust http://dx.doi.org/10.13039/501100004815
    Description: Deutsche Forschungsgemeinschaft http://dx.doi.org/10.13039/501100001659
    Description: National Science Foundation http://dx.doi.org/10.13039/100000001
    Description: https://doi.pangaea.de/10.1594/PANGAEA.946881
    Keywords: ddc:549 ; reverse weathering ; clay authigenesis ; calcium ; potassium ; porewater ; strontium
    Language: English
    Type: doc-type:article
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    CITATION GEO-LEO
  • 2
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    Aerosol lithium concentration data from the Indian and Pacific ocean (2022)
    PANGAEA
    Details
    Publication Date: 2023-03-04
    Description: A total of 125 aerosol samples were analysed for their lithium concentrations and deposition flux. Daily aerosol samples were collected from the Pacific Ocean during CLIVAR-CO2 Repeat Hydrography Sections P16 and P2. The P16 section follows 150°-152°W and was divided into two legs, a southern leg from 17°S to 71°S in January-February 2005, and a northern leg from 16°S to 56°N in February-March 2006. CLIVAR-CO2 section P2 from Japan to San Diego, along 30°N, was visited in June-August 2004. The aerosol data from both CLIVAR-CO2 sections include aerosol lithium concentration measured following digestion in HF:HNO3:HCl mixture and corrected for sea-salt contributions (Li xs total), the P16 data also includes aerosol lithium extracted with ultrapure deionised water (≥18 MΩ) by pulling 100 mL of deionised water within ten seconds through the filter (Li xs MQ). Aerosol lithium deposition flux was calculated based on the local rain rate.
    Keywords: aerosol; Cruise/expedition; DATE/TIME; Indian Ocean; LATITUDE; Lithium; Lithium, flux; Lithium, soluble; LONGITUDE; Pacific Ocean; Precipitation, annual, mean; Sinking velocity
    Type: Dataset
    Format: text/tab-separated-values, 999 data points
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    DATA PANGAEA
  • 3
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    Time series (2017-2018) of dissolved trace metals, macro-nutrients, major elements and Pb isotopes in the Gulf of Aqaba, Red Sea (2023)
    PANGAEA
    Details
    Publication Date: 2024-01-13
    Description: This dataset contains concentrations of dissolved trace metals (Al, Mn, Co, Ni, Cu, Zn, Cd, and Pb), macro-nutrients (Si and PO4), major elements (Li, Ca, K, Mg, and Sr) and Pb isotope compositions (206Pb/207Pb, 208Pb/206Pb) from a time-series station (Station A, ~700 m water depth) at the Gulf of Aqaba, northern Red Sea. Vertical water column profiles were collected between January 2017 and November 2018 on a monthly-daily resolution as part of the GEOTRACES REDMAST campaign. Seawater samples were collected using GO-Flo bottles, filtered (0.2 µm) and acidified to pH〈1.8. Samples for trace metal concentrations and Pb isotopes were pre-concentrated using the the NOBIAS chelate PA-1 resin and measured using an Agilent 7500cx Magnetic Sector ICP-MS and a Thermo-Scientific Neptune Plus Multi Collector ICP-MS, respectively (Benaltabet, T., Lapid, G., & Torfstein, A. (2020). Seawater Pb concentration and isotopic composition response to daily time scale dust storms in the Gulf of Aqaba, Red Sea. Marine Chemistry, 227, 103895.‏). Macro-nutrient concentrations were measured using a Flow Injection Quik-Chem 8500 Auto-analyzer (Grasshoff, K., Kremling, K., & Ehrhardt, M. (Eds.). (2009). Methods of seawater analysis. John Wiley & Sons.‏). Major elements were analyzed as their ratio to Na by sample-standard bracketing using an Agilent Technology Varian-720 ICP-OES (Steiner, Z., Turchyn, A. V., Harpaz, E., & Silverman, J. (2018). Water chemistry reveals a significant decline in coral calcification rates in the southern Red Sea. Nature communications, 9(1), 3615.‏).
    Keywords: Aluminium; Cadmium; Calcium; Cobalt; Copper; DATE/TIME; Density, sigma-theta (0); DEPTH, water; GEOTRACES; Global marine biogeochemical cycles of trace elements and their isotopes; GOFLO; Go-Flo bottles; Gulf_of_Aqaba-Station-A; isotope compositions; LATITUDE; Lead; Lead-206/Lead-207 ratio; Lead-208/Lead-206 ratio; Lithium; LONGITUDE; macronutrients; Magnesium; major elements; Manganese; Nickel; oceanographic time series; Pb isotopes; Phosphate; Potassium; Red Sea; Salinity; seawater; Silicate; Standard deviation; Strontium; Temperature, water; trace metals; Zinc
    Type: Dataset
    Format: text/tab-separated-values, 4819 data points
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    DATA PANGAEA
  • 4
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    Particulate carbon data from 5 sediment cores from the North Pacific CDisK-IV expedition (2022)
    PANGAEA
    Details
    Publication Date: 2023-12-11
    Description: Sediment PIC concentration profiles were determined from dried and ground sediment powder. Splits were weighed into 10 mL exetainer test tubes (5-20 mg) and acidified with 10% phosphoric acid. The evolved CO2 was measured using a Picarro 2131i. Total CO2 in the Picarro analysis was standardized by running known masses of optical grade calcite standard material.
    Keywords: Carbon, inorganic, particulate; Carbon, organic, particulate; CDISK4-1; CDISK4-2; CDISK4-3; CDISK4-4; CDISK4-5; CDISK-IV; Depth, compacted; Elevation of event; Event label; LATITUDE; LONGITUDE; MUC; MultiCorer; North Pacific Ocean; Porewater chemistry; RV Kilo Moana; sediment; Station label
    Type: Dataset
    Format: text/tab-separated-values, 455 data points
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    DATA PANGAEA
  • 5
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    Porewater chemistry from sediment core CDISK4-1 from the North Pacific CDisK-IV expedition (2022)
    PANGAEA
    Details
    Publication Date: 2023-12-11
    Description: Samples were collected at six oceanographic stations during cruise CDisK-IV on board RV Kilo Moana from Hawaii to Alaska in August 2017 using an 8-barrel multi-corer. Sediment porewaters were extracted in a cold room, using Rhizon samplers inserted into pre-drilled holes in the core liner, from two cores with undisturbed sediment-water interfaces, from each multi-corer cast. Pre-treatment of the Rhizon samplers and the sampling protocol was different for each of the two cores. Rhizons inserted to core number 1 from each cast were new from the box, and the samples were used for nutrient and major element analyses. A 20 ml syringe was filled from each Rhizon, inserted dry, and the extracted water was filtered again via a 0.45 µm filter. Rhizons inserted to core number 2 were acid-cleaned with 0.001 N HNO3 for at least 24 hours, rinsed with de-ionised water (Milli-Q, Millipore) and kept in de-ionised water until use. The first 1 mL extracted was discarded, and the next 2 mL were stored in acid cleaned polypropylene (PP) vials. These samples, destined for analyses of trace and major elements, were acidified with HNO3 to final acid concentration of 0.035 M.
    Keywords: Aluminium; Arsenic; Barium; Cadmium; Calcium/Sodium ratio; CDISK4-1; CDISK-IV; Chromium; Cobalt; Copper; Core; DEPTH, sediment/rock; Iron; Lead; Lithium/Sodium ratio; Magnesium/Calcium ratio; Magnesium/Sodium ratio; Manganese; Molybdenum; MUC; MultiCorer; Nickel; Nitrate and Nitrite; North Pacific Ocean; Porewater chemistry; Potassium/Sodium ratio; RV Kilo Moana; Sample code/label; sediment; Silicate; Standard deviation; Station label; Strontium/Calcium ratio; Strontium/Sodium ratio; Sulfur/Sodium ratio; Uranium; Vanadium; Zinc; δ44/40 Ca; δ44/40 Ca, standard deviation
    Type: Dataset
    Format: text/tab-separated-values, 1275 data points
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    DATA PANGAEA
  • 6
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    Seawater lithium concentration data from the Indian and Pacific ocean (2022)
    PANGAEA
    Details
    Publication Date: 2024-04-19
    Description: A total of 603 seawater samples were analysed for their lithium concentrations. The seawater samples were collected during eight research expeditions. All seawater lithium concentrations were normalised to TEOS-10 absolute salinity of 35 g/kg. Most seawater samples were collected using Niskin bottles and filtered using 0.22 µm filters. Exceptions are samples UW1-UW26 that were collected from the underway water system of RV Kilo Moana during cruise CDisK-IV, and surface water samples from the Red Sea that were collected using a bucket lowered from the deck of a container ship. Samples from cruises SOE09, RS2015 and RS2018 were not filtered. The seawater samples were collected during the following cruises: CDisK-IV from Hawaii to Alaska in 01-30 August 2017; SN105 from Goa to Mauritius, samples collected during 7-16 December 2015; RS2015 from the Bay of Bengal to the Mediterranean Sea, samples collected during 27 December 2015 to 3 January 2016; RS2018 from the Bay of Bengal to the Mediterranean Sea, samples collected during 23-31 March 2018; SOE09 in the Indian sector of the Southern Ocean in 12 January - 21 February 2017; JR274 in the Atlantic sector of the Southern Ocean between 9 January and 12 February 2013; D357 and JC068 sailed from South Africa to South America, mostly along 40°S, cruise D357 in 18 October – 22 November 2010, and cruise JC068 in 24 December 2011 – 27 January 2011.
    Keywords: aerosol; CDISK4-track; CDISK-IV; Cruise/expedition; CT; DATE/TIME; Density, sigma, in situ; Density, sigma-theta (0); DEPTH, water; Indian Ocean; LATITUDE; Lithium; Lithium, standard deviation; LONGITUDE; Pacific Ocean; RV Kilo Moana; Salinity, absolute; SN105-track; SOE9-track; Station label; Temperature, water; Underway cruise track measurements
    Type: Dataset
    Format: text/tab-separated-values, 4824 data points
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    DATA PANGAEA
  • 7
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    Porewater chemistry from sediment core CDISK4-2 from the North Pacific CDisK-IV expedition (2022)
    PANGAEA
    Details
    Publication Date: 2024-06-12
    Description: Samples were collected at six oceanographic stations during cruise CDisK-IV on board RV Kilo Moana from Hawaii to Alaska in August 2017 using an 8-barrel multi-corer. Sediment porewaters were extracted in a cold room, using Rhizon samplers inserted into pre-drilled holes in the core liner, from two cores with undisturbed sediment-water interfaces, from each multi-corer cast. Pre-treatment of the Rhizon samplers and the sampling protocol was different for each of the two cores. Rhizons inserted to core number 1 from each cast were new from the box, and the samples were used for nutrient and major element analyses. A 20 ml syringe was filled from each Rhizon, inserted dry, and the extracted water was filtered again via a 0.45 µm filter. Rhizons inserted to core number 2 were acid-cleaned with 0.001 N HNO3 for at least 24 hours, rinsed with de-ionised water (Milli-Q, Millipore) and kept in de-ionised water until use. The first 1 mL extracted was discarded, and the next 2 mL were stored in acid cleaned polypropylene (PP) vials. These samples, destined for analyses of trace and major elements, were acidified with HNO3 to final acid concentration of 0.035 M.
    Keywords: Aluminium; Arsenic; Barium; Cadmium; Calcium/Sodium ratio; CDISK4-2; CDISK-IV; Chromium; Cobalt; Copper; Core; DEPTH, sediment/rock; Iron; Lead; Lithium/Sodium ratio; Magnesium/Calcium ratio; Magnesium/Sodium ratio; Manganese; Molybdenum; MUC; MultiCorer; Nickel; Nitrate and Nitrite; North Pacific Ocean; Porewater chemistry; Potassium/Sodium ratio; RV Kilo Moana; Sample code/label; sediment; Silicate; Standard deviation; Station label; Strontium/Calcium ratio; Strontium/Sodium ratio; Sulfur/Sodium ratio; Uranium; Vanadium; Zinc; δ44/40 Ca; δ44/40 Ca, standard deviation
    Type: Dataset
    Format: text/tab-separated-values, 1479 data points
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    DATA PANGAEA
  • 8
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    Porewater chemistry from sediment core CDISK4-5 from the North Pacific CDisK-IV expedition (2022)
    PANGAEA
    Details
    Publication Date: 2024-06-12
    Description: Samples were collected at six oceanographic stations during cruise CDisK-IV on board RV Kilo Moana from Hawaii to Alaska in August 2017 using an 8-barrel multi-corer. Sediment porewaters were extracted in a cold room, using Rhizon samplers inserted into pre-drilled holes in the core liner, from two cores with undisturbed sediment-water interfaces, from each multi-corer cast. Pre-treatment of the Rhizon samplers and the sampling protocol was different for each of the two cores. Rhizons inserted to core number 1 from each cast were new from the box, and the samples were used for nutrient and major element analyses. A 20 ml syringe was filled from each Rhizon, inserted dry, and the extracted water was filtered again via a 0.45 µm filter. Rhizons inserted to core number 2 were acid-cleaned with 0.001 N HNO3 for at least 24 hours, rinsed with de-ionised water (Milli-Q, Millipore) and kept in de-ionised water until use. The first 1 mL extracted was discarded, and the next 2 mL were stored in acid cleaned polypropylene (PP) vials. These samples, destined for analyses of trace and major elements, were acidified with HNO3 to final acid concentration of 0.035 M.
    Keywords: Aluminium; Arsenic; Barium; Cadmium; Calcium/Sodium ratio; CDISK4-5; CDISK-IV; Chromium; Cobalt; Copper; Core; DEPTH, sediment/rock; Iron; Lead; Lithium/Sodium ratio; Magnesium/Calcium ratio; Magnesium/Sodium ratio; Manganese; Molybdenum; MUC; MultiCorer; Nickel; Nitrate and Nitrite; North Pacific Ocean; Porewater chemistry; Potassium/Sodium ratio; RV Kilo Moana; Sample code/label; sediment; Silicate; Standard deviation; Station label; Strontium/Calcium ratio; Strontium/Sodium ratio; Sulfur/Sodium ratio; Uranium; Vanadium; Zinc; δ44/40 Ca; δ44/40 Ca, standard deviation
    Type: Dataset
    Format: text/tab-separated-values, 1071 data points
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    DATA PANGAEA
  • 9
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    Porewater chemistry from sediment core CDISK4-4 from the North Pacific CDisK-IV expedition (2022)
    PANGAEA
    Details
    Publication Date: 2024-06-12
    Description: Samples were collected at six oceanographic stations during cruise CDisK-IV on board RV Kilo Moana from Hawaii to Alaska in August 2017 using an 8-barrel multi-corer. Sediment porewaters were extracted in a cold room, using Rhizon samplers inserted into pre-drilled holes in the core liner, from two cores with undisturbed sediment-water interfaces, from each multi-corer cast. Pre-treatment of the Rhizon samplers and the sampling protocol was different for each of the two cores. Rhizons inserted to core number 1 from each cast were new from the box, and the samples were used for nutrient and major element analyses. A 20 ml syringe was filled from each Rhizon, inserted dry, and the extracted water was filtered again via a 0.45 µm filter. Rhizons inserted to core number 2 were acid-cleaned with 0.001 N HNO3 for at least 24 hours, rinsed with de-ionised water (Milli-Q, Millipore) and kept in de-ionised water until use. The first 1 mL extracted was discarded, and the next 2 mL were stored in acid cleaned polypropylene (PP) vials. These samples, destined for analyses of trace and major elements, were acidified with HNO3 to final acid concentration of 0.035 M.
    Keywords: Aluminium; Arsenic; Barium; Cadmium; Calcium/Sodium ratio; CDISK4-4; CDISK-IV; Chromium; Cobalt; Copper; Core; DEPTH, sediment/rock; Iron; Lead; Lithium/Sodium ratio; Magnesium/Calcium ratio; Magnesium/Sodium ratio; Manganese; Molybdenum; MUC; MultiCorer; Nickel; Nitrate and Nitrite; North Pacific Ocean; Porewater chemistry; Potassium/Sodium ratio; RV Kilo Moana; Sample code/label; sediment; Silicate; Standard deviation; Station label; Strontium/Calcium ratio; Strontium/Sodium ratio; Sulfur/Sodium ratio; Uranium; Vanadium; Zinc; δ44/40 Ca; δ44/40 Ca, standard deviation
    Type: Dataset
    Format: text/tab-separated-values, 1224 data points
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    DATA PANGAEA
  • 10
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    Porewater chemistry from sediment core CDISK4-6 from the North Pacific CDisK-IV expedition (2022)
    PANGAEA
    Details
    Publication Date: 2024-06-12
    Description: Samples were collected at six oceanographic stations during cruise CDisK-IV on board RV Kilo Moana from Hawaii to Alaska in August 2017 using an 8-barrel multi-corer. Sediment porewaters were extracted in a cold room, using Rhizon samplers inserted into pre-drilled holes in the core liner, from two cores with undisturbed sediment-water interfaces, from each multi-corer cast. Pre-treatment of the Rhizon samplers and the sampling protocol was different for each of the two cores. Rhizons inserted to core number 1 from each cast were new from the box, and the samples were used for nutrient and major element analyses. A 20 ml syringe was filled from each Rhizon, inserted dry, and the extracted water was filtered again via a 0.45 µm filter. Rhizons inserted to core number 2 were acid-cleaned with 0.001 N HNO3 for at least 24 hours, rinsed with de-ionised water (Milli-Q, Millipore) and kept in de-ionised water until use. The first 1 mL extracted was discarded, and the next 2 mL were stored in acid cleaned polypropylene (PP) vials. These samples, destined for analyses of trace and major elements, were acidified with HNO3 to final acid concentration of 0.035 M.
    Keywords: Aluminium; Arsenic; Barium; Cadmium; Calcium/Sodium ratio; CDISK4-6; CDISK-IV; Chromium; Cobalt; Copper; Core; DEPTH, sediment/rock; Iron; Lead; Lithium/Sodium ratio; Magnesium/Calcium ratio; Magnesium/Sodium ratio; Manganese; Molybdenum; MUC; MultiCorer; Nickel; Nitrate and Nitrite; North Pacific Ocean; Porewater chemistry; Potassium/Sodium ratio; RV Kilo Moana; Sample code/label; sediment; Silicate; Standard deviation; Station label; Strontium/Calcium ratio; Strontium/Sodium ratio; Sulfur/Sodium ratio; Uranium; Vanadium; Zinc; δ44/40 Ca; δ44/40 Ca, standard deviation
    Type: Dataset
    Format: text/tab-separated-values, 561 data points
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    DATA PANGAEA
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