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  • 1
    Online Resource
    Online Resource
    Interactions of trace metals, DOM, and particles in the Amazon estuary and associated plume as key processes for trace metal and DOM fluxes into the Atlantic : a contribution to the international GEOTRACES program : Cruise no. M147 : April 19-May 21, 2018, Las Palmas (Gran Canaria) - Belém (Brazil) (2018)
    Bremen : Jacobs University Bremen
    Details Availability
    Keywords: Forschungsbericht ; Amazonas ; Mündungsgebiet ; Atlantischer Ozean Süd ; Spurenmetall ; Gelöster organischer Stoff ; Stoffeintrag
    Type of Medium: Online Resource
    Pages: 1 Online-Ressource (63 Seiten, 3,86 MB) , Illustrationen, Diagramme, Karten
    Series Statement: METEOR-Berichte
    URL: https://doi.org/10.2314/GBV:104944342X
    URL: http://edok01.tib.uni-hannover.de/edoks/e01fn19/104944342X.pdf
    Language: German
    Note: Abweichender Titel: Meteor-Berichte, Cruise 147, Las Palmas - Belém, April 09 - May 21 2018 , Förderkennzeichen: 458/2017/CB/Te Leitstelle CEN, Uni-Hamburg
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  • 2
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    Heme b concentrations determined in particulate material collected from 10 mesocosm (M1-10) situated in Gllmar Fjord in 2013 and from a control site in the Fjord waters (Fjord) (2017)
    PANGAEA
    In:  GEOMAR - Helmholtz Centre for Ocean Research Kiel | Supplement to: Bellworthy, Jessica; Gledhill, Martha; Esposito, Mario; Achterberg, Eric Pieter (2017): Abundance of the iron containing biomolecule, heme b, during the progression of a spring phytoplankton bloom in a mesocosm experiment. PLoS ONE, 12(4), e0176268, https://doi.org/10.1371/journal.pone.0176268
    Details
    Publication Date: 2023-02-24
    Description: Concentrations of heme b were determined in a mesocosm experiment situated in Gullmar Fjord off Sweden. The mesocosm experiment lasted for ca. one hundred days and was characterised by the growth of a primary nutrient replete and a secondary nutrient deplete phytoplankton bloom. Heme b varied between 40 ± 10 pmol/l in the prebloom period up to a maximum of 700 ± 400 pmol/l just prior to the time of the primary chlorophyll a maximum. Thereafter, heme b concentrations decreased again to an average of 120 ± 60 pmol/l. When normalised to total particulate carbon, heme b was most abundant during the initiation of the nutrient replete spring bloom, when ratios reached 52 ± 24 µmol/mol; ten times higher than values observed both pre and post the primary bloom. Concentrations of heme b correlated with those of chlorophyll a. Nevertheless, differences were observed in the relative concentrations of the two parameters, with heme b concentrations increasing relative to chlorophyll a during the growth of the primary bloom, decreasing over the period of the secondary bloom and increasing again through the latter period of the experiment. Heme b abundance was therefore influenced by nutrient concentrations and also likely by changing community composition. In half of the mesocosms, pCO2 was elevated and maintained at ca.1000 µatm, however we observed no significant differences between heme b in plus or ambient pCO2 mesocosms, either in absolute terms, or relative to total particulate carbon and chlorophyll a. The results obtained in this study contribute to our understanding of the distribution of this significant component of the biogenic iron pool, and provide an iron replete coastal water end member that aids the interpretation of the distributions of heme b in more iron deplete open ocean waters.
    Keywords: BIOACID; Biological Impacts of Ocean Acidification; DATE/TIME; Event label; Gullmar Fjord, Skagerrak, Sweden; Heme b; KOSMOS_2013_Fjord; KOSMOS_2013_Mesocosm-M1; KOSMOS_2013_Mesocosm-M10; KOSMOS_2013_Mesocosm-M2; KOSMOS_2013_Mesocosm-M3; KOSMOS_2013_Mesocosm-M4; KOSMOS_2013_Mesocosm-M5; KOSMOS_2013_Mesocosm-M6; KOSMOS_2013_Mesocosm-M7; KOSMOS_2013_Mesocosm-M8; KOSMOS_2013_Mesocosm-M9; KOSMOS 2013; Kristineberg, Sweden; MESO; Mesocosm experiment; Mesocosm label
    Type: Dataset
    Format: text/tab-separated-values, 522 data points
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 3
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    Trace metal data from water samples during METEOR cruise M135 (2021)
    PANGAEA
    Details
    Publication Date: 2023-10-28
    Description: The file contains dissolved and total dissolvable trace metal concentrations (Fe, Co, Mn, Ni, Cd, Cu, Pb, Zn and V), hydrogen peroxide (H2O2), Fe(II), and iodide and iodate concentrations of surface water samples and station depth profiles. Trace metal concentrations were measured by ICP-MS after preconcentration (Rapp et al. 2017, Anal. Chim. Acta). Fe(II) and H2O2 were analyzed on-board using chemiluminescence flow injection analysis (Hopwood et al. 2017, Sci. Rep.). Iodide concentrations were analyzed by cathodic stripping square wave voltammetry (Luther et al. 1988, Anal. Chem.) and Iodate concentrations were measured spectrophotometrically (Chapman and Liss 1977, Mar. Chem.).
    Keywords: Bottle number; Cadmium; Climate - Biogeochemistry Interactions in the Tropical Ocean; CT; CTD/Rosette, ultra clean; CTD-UC; DATE/TIME; DEPTH, water; Event label; Flag; Iron; LATITUDE; LONGITUDE; M135; M135_254-1; M135_259-2; M135_261-1; M135_264-1; M135_266-1; M135_269-1; M135_271-1; M135_273-2; M135_275-1; M135_277-1; M135_279-1; M135_281-1; M135_288-1; M135_290-2; M135_293-1; M135_297-2; M135_299-1; M135_301-1; M135_303-1; M135_308-1; M135_313-2; M135_315-2; M135_317-2; M135_320-1; M135_324-2; M135_328-1; M135-track; Meteor (1986); Nitrate; Nitrite; Nitrogen, organic, dissolved; Nitrogen, reduced; Oxygen; Phosphate; Phosphorus, organic, dissolved; Sample code/label; SFB754; SFB754/POSTRE-II; Silicate; Underway cruise track measurements
    Type: Dataset
    Format: text/tab-separated-values, 8317 data points
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 4
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    Trace metal data from water samples during METEOR cruise M136 (2021)
    PANGAEA
    Details
    Publication Date: 2023-10-28
    Description: The file contains dissolved and total dissolvable trace metal concentrations (Fe, Co, Mn, Ni, Cd, Cu, Pb, Zn and V), hydrogen peroxide (H2O2), Fe(II), and iodide and iodate concentrations of surface water samples and station depth profiles. Trace metal concentrations were measured by ICP-MS after preconcentration (Rapp et al. 2017, Anal. Chim. Acta). Fe(II) and H2O2 were analyzed on-board using chemiluminescence flow injection analysis (Hopwood et al. 2017, Sci. Rep.). Iodide concentrations were analyzed by cathodic stripping square wave voltammetry (Luther et al. 1988, Anal. Chem.) and Iodate concentrations were measured spectrophotometrically (Chapman and Liss 1977, Mar. Chem.).
    Keywords: Alkalinity, total; Ammonium; Bottle number; Cadmium; Carbon, inorganic, dissolved; Climate - Biogeochemistry Interactions in the Tropical Ocean; CT; CTD/Rosette, ultra clean; CTD-UC; DATE/TIME; DEPTH, water; Event label; Flag; Iron; Iron II, ferrous iron; LATITUDE; LONGITUDE; M136; M136_354-1; M136_366-1; M136_377-1; M136_394-1; M136_403-1; M136_413-1; M136_427-1; M136_443-1; M136_457-1; M136_465-1; M136_474-1; M136_487-1; M136_499-1; M136_535-1; M136_556-1; M136_572-1; M136_589-1; M136-track; Meteor (1986); Nitrate; Nitrite; Nitrogen, reduced; Phosphate; Sample code/label; SFB754; Silicate; Underway cruise track measurements
    Type: Dataset
    Format: text/tab-separated-values, 3831 data points
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 5
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    Trace metal data from water samples during METEOR cruise M138 (2021)
    PANGAEA
    Details
    Publication Date: 2023-10-28
    Description: The file contains dissolved and total dissolvable trace metal concentrations (Fe, Co, Mn, Ni, Cd, Cu, Pb, Zn and V), hydrogen peroxide (H2O2), Fe(II), and iodide and iodate concentrations of surface water samples and station depth profiles. Trace metal concentrations were measured by ICP-MS after preconcentration (Rapp et al. 2017, Anal. Chim. Acta). Fe(II) and H2O2 were analyzed on-board using chemiluminescence flow injection analysis (Hopwood et al. 2017, Sci. Rep.). Iodide concentrations were analyzed by cathodic stripping square wave voltammetry (Luther et al. 1988, Anal. Chem.) and Iodate concentrations were measured spectrophotometrically (Chapman and Liss 1977, Mar. Chem.).
    Keywords: Bottle number; Cadmium; Climate - Biogeochemistry Interactions in the Tropical Ocean; CT; CTD/Rosette, ultra clean; CTD-UC; DATE/TIME; DEPTH, water; Event label; Flag; Iron; LATITUDE; LONGITUDE; M138; M138_882-17; M138_883-13; M138_884-5; M138_885-4; M138_888-5; M138_892-18; M138_897-10; M138_898-4; M138_904-13; M138_906-6; M138-track; Meteor (1986); Nitrate; Nitrite; Nitrogen, reduced; Phosphate; Sample code/label; SFB754; Silicate; Underway cruise track measurements
    Type: Dataset
    Format: text/tab-separated-values, 2072 data points
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 6
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    Trace metal data from water samples during METEOR cruise M137 (2021)
    PANGAEA
    Details
    Publication Date: 2023-10-28
    Description: The file contains dissolved and total dissolvable trace metal concentrations (Fe, Co, Mn, Ni, Cd, Cu, Pb, Zn and V), hydrogen peroxide (H2O2), Fe(II), and iodide and iodate concentrations of surface water samples and station depth profiles. Trace metal concentrations were measured by ICP-MS after preconcentration (Rapp et al. 2017, Anal. Chim. Acta). Fe(II) and H2O2 were analyzed on-board using chemiluminescence flow injection analysis (Hopwood et al. 2017, Sci. Rep.). Iodide concentrations were analyzed by cathodic stripping square wave voltammetry (Luther et al. 1988, Anal. Chem.) and Iodate concentrations were measured spectrophotometrically (Chapman and Liss 1977, Mar. Chem.).
    Keywords: Alkalinity, total; Ammonium; Bottle number; Cadmium; Carbon, inorganic, dissolved; Climate - Biogeochemistry Interactions in the Tropical Ocean; CT; CTD/Rosette, ultra clean; CTD-UC; DATE/TIME; DEPTH, water; Event label; Flag; Iron; LATITUDE; LONGITUDE; M137; M137_613-1; M137_630-1; M137_638-1; M137_653-1; M137_671-1; M137_685-1; M137_699-1; M137_708-1; M137_724-1; M137_738-1; M137_758-1; M137_792-1; M137_803-1; M137_824-1; M137_835-1; M137_859-1; M137_874-1; M137_875-1; M137-track; Meteor (1986); Nitrate; Nitrite; Nitrogen, reduced; Phosphate; Sample code/label; SFB754; Silicate; Underway cruise track measurements
    Type: Dataset
    Format: text/tab-separated-values, 4327 data points
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    DATA PANGAEA
  • 7
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    Seawater carbonate chemistry and the decrease of H+ concentration in the phycosphere and thickness of the pH boundary layer of marine diatoms Coscinodiscus wailesii (2022)
    PANGAEA
    Details
    Publication Date: 2024-03-15
    Description: Surface ocean pH is declining due to anthropogenic atmospheric CO2 uptake with a global decline of ~0.3 possible by 2100. Extracellular pH influences a range of biological processes, including nutrient uptake, calcification and silicification. However, there are poor constraints on how pH levels in the extracellular microenvironment surrounding phytoplankton cells (the phycosphere) differ from bulk seawater. This adds uncertainty to biological impacts of environmental change. Furthermore, previous modelling work suggests that phycosphere pH of small cells is close to bulk seawater, and this has not been experimentally verified. Here we observe under 140 μmol photons/m**2/s the phycosphere pH of Chlamydomonas concordia (5 µm diameter), Emiliania huxleyi (5 µm), Coscinodiscus radiatus (50 µm) and C. wailesii (100 µm) are 0.11 ± 0.07, 0.20 ± 0.09, 0.41 ± 0.04 and 0.15 ± 0.20 (mean ± SD) higher than bulk seawater (pH 8.00), respectively. Thickness of the pH boundary layer of C. wailesii increases from 18 ± 4 to 122 ± 17 µm when bulk seawater pH decreases from 8.00 to 7.78. Phycosphere pH is regulated by photosynthesis and extracellular enzymatic transformation of bicarbonate, as well as being influenced by light intensity and seawater pH and buffering capacity. The pH change alters Fe speciation in the phycosphere, and hence Fe availability to phytoplankton is likely better predicted by the phycosphere, rather than bulk seawater. Overall, the precise quantification of chemical conditions in the phycosphere is crucial for assessing the sensitivity of marine phytoplankton to ongoing ocean acidification and Fe limitation in surface oceans.
    Keywords: Acid-base regulation; Alkalinity, total; Aragonite saturation state; Bicarbonate ion; Bottles or small containers/Aquaria (〈20 L); Calcite saturation state; Calculated using seacarb after Nisumaa et al. (2010); Carbon, inorganic, dissolved; Carbonate ion; Carbonate system computation flag; Carbon dioxide; Chromista; Coscinodiscus wailesii; Figure; Fugacity of carbon dioxide (water) at sea surface temperature (wet air); Hydrogen ion concentration; Laboratory experiment; Laboratory strains; Not applicable; OA-ICC; Ocean Acidification International Coordination Centre; Ochrophyta; Partial pressure of carbon dioxide (water) at sea surface temperature (wet air); Pelagos; pH; Phytoplankton; Proton gradients; Salinity; Single species; Species, unique identification; Temperature, water; Thickness; Treatment; Type
    Type: Dataset
    Format: text/tab-separated-values, 3286 data points
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    DATA PANGAEA
  • 8
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    The apparent iron solubility calculated from ambient temperature, pH and dissolved organic carbon in the Atlantic and Pacific oceans (2022)
    PANGAEA
    Details
    Publication Date: 2024-04-20
    Description: Iron (Fe) is an important limiting nutrient in the marine environment constraining primary production across much of the ocean due to its sparse solubility in seawater. Iron availability regulates the magnitude and dynamics of ocean primary productivity, and is dependent on Fe solubility and speciation in seawater which in turn are influenced by physico-chemical properties such as pH, temperature, dissolved organic material. In this study, the apparent iron solubility (SFe(III)app) is calculated in an oversaturated system by setting an input of dissolved Fe(III) to 10 nmol L-1, at ambient ocean pH, temperature and dissolved organic carbon concentrations. This will result in the precipitation of Fe hydroxide, as ferrihydrite assumed in our system. The SFe(III)app is defined as the sum of aqueous inorganic Fe(III) species and Fe(III) bound to DOM, formed at a free Fe (Fe3+) concentration equal to the limiting solubility of Fe hydroxide (Fe(OH)3(s)). We compared calculated apparent iron solubility to measured dissolved iron concentrations (dFe) from three GEOTRACES cruises in the Atlantic and Pacific oceans. I aim to build a comprehensive picture on Fe speciation and dFe inventory in the ambient oceanic water column, with further feedbacks on primary productivity.
    Keywords: Alkalinity, total; Biogeochemical Cycling; Carbon, inorganic, dissolved; Carbon, organic, dissolved; DEPTH, water; Event label; GA02_10A; GA02_10B; GA02_11A; GA02_11B; GA02_12A; GA02_12B; GA02_13A; GA02_13B; GA02_14A; GA02_14B; GA02_15A; GA02_15B; GA02_16A; GA02_16B; GA02_17A; GA02_17B; GA02_18A; GA02_18B; GA02_19; GA02_21; GA02_22; GA02_23; GA02_24; GA02_25; GA02_26; GA02_28; GA02_29; GA02_2A; GA02_2B; GA02_3; GA02_31; GA02_32; GA02_33; GA02_34; GA02_35; GA02_36; GA02_37; GA02_38; GA02_39; GA02_4; GA02_40; GA02_41; GA02_5A; GA02_5B; GA02_6A; GA02_6B; GA02_7; GA02_8A; GA02_8B; GA02_9A; GA02_9B; GA06_18; GA06_2; GA06_3; GA06_4; GA06_6; GA06_7; GA06_8; GA06_9; GEOTRACES; Global marine biogeochemical cycles of trace elements and their isotopes; GP16_1; GP16_10; GP16_11; GP16_12; GP16_13; GP16_15; GP16_17; GP16_18; GP16_2; GP16_20; GP16_21; GP16_23; GP16_25; GP16_26; GP16_27; GP16_28; GP16_3; GP16_30; GP16_31; GP16_34; GP16_35; GP16_36; GP16_4; GP16_5; GP16_6; GP16_7; GP16_8; GP16_9; Iron; Iron Geochemistry; Measured; Modeled; Ocean acidification; ocean warming; pH; Salinity; Station label; Temperature, water; trace metals
    Type: Dataset
    Format: text/tab-separated-values, 12700 data points
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    DATA PANGAEA
  • 9
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    Pore water geochemistry (Fe, K, nitrate) of sediment core M147_117-1 (MUC21) (2022)
    PANGAEA
    Details
    Publication Date: 2024-03-28
    Description: Pore water nitrate concentrations were measured on board with a SEAL QuAAtro continuous flow auto analyzer. Pore water samples for dissolved element analysis were acidified with HCl to pH 〈 2 after sampling. Depending on the concentration range, pore water K and Fe was measured by inductively coupled plasma optical emission spectrometry (Varian 720 ES) or inductively coupled plasma mass spectrometry (Agilent 7500).
    Keywords: continental shelf; DATE/TIME; DEPTH, sediment/rock; Fe speciation; Iron; LATITUDE; LONGITUDE; M147; M147_117-1; Meteor (1986); MUC; MultiCorer; Nitrate; porewater; Potassium; Sample code/label; Sample elevation; sediment
    Type: Dataset
    Format: text/tab-separated-values, 65 data points
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  • 10
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    Solid phase sediment and pore water data (Al, Fe, K, nitrate, organic carbon) from the Amazon continental shelf (cruise M147) (2022)
    PANGAEA
    Details
    Publication Date: 2024-03-28
    Description: Sediment and pore water samples were collected during the M147 cruise of Research Vessel Meteor in April and May 2018. Additional sediment samples (GeoB 4417-5 and GeoB 4409-2) were collected during the M38-2 cruise in March 1997. Total element concentrations (Fe, Al, K) of the solid phase were measured after acid digestion (HF, HNO3 and HClO4) by inductively coupled plasma optical emission spectrometry (Varian ICP 720-ES). Solid phase iron speciation data were measured following single step sodium dithionite extraction (FeD) or sequential Fe extraction (FeAc, FeDith, FeOxal) by inductively coupled plasma optical emission spectrometry (Varian ICP 720-ES). Solid phase pyrite concentrations (FePy) were calculated stoichiometrically from photometrically measured S2- released via chromium(II) chloride reduction. Total organic carbon (TOC) of the sediment samples was measured in an Elemental Analyzer (Euro EA). Prior to analysis carbon bound to carbonate minerals was removed by leaching the sediment with 0.25 N HCl. Pore water nitrate concentrations were measured on board with a SEAL QuAAtro continuous flow auto analyzer. Pore water samples for dissolved element analysis were acidified with HCl to pH 〈 2 after sampling. Depending on the concentration range, pore water K and Fe was measured by inductively coupled plasma optical emission spectrometry (Varian 720 ES) or inductively coupled plasma mass spectrometry (Agilent 7500).
    Keywords: continental shelf; Fe speciation; porewater; sediment
    Type: Dataset
    Format: application/zip, 17 datasets
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