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  • 2020-2024  (6)
Publikationsart
Schlagwörter
Verlag/Herausgeber
Erscheinungszeitraum
Jahr
  • 1
    Publikationsdatum: 2023-12-12
    Beschreibung: Near-daily concentrations of Chlorophyll a and phaeopigments from RV Polarsterns underway water supply system (inlet at 11m water depth) collected during legs 1,3,4, and 5 of the MOSAiC (PS122) drift expedition in the central Arctic Ocean. 2-4L of water were filtered onto pre-combusted GF/F filters (nominal pore size 0.7µm) and frozen at -80°C. Samples were subsequently extracted in 90°C acetone, homogenized using a cell mill, and measured on the following day using a Turner flourometer, followed by an acidification step to determine phaeopigments (see Knap et al. 1996 for details and calculations). Samples were collected from end of October 2019 to beginning of October 2020, with a gap between mid-December and the end of February.
    Schlagwort(e): Acidification method according to Knap et al. (1996); Activity description; Arctic Ocean; Cast number; CHLa; Chl-a; Chlorophyll a; DATE/TIME; DEPTH, water; Device type; Event label; LATITUDE; Leg Number; LONGITUDE; Mosaic; MOSAiC; MOSAiC_ECO; MOSAiC20192020; Multidisciplinary drifting Observatory for the Study of Arctic Climate; North Greenland Sea; Phaeopigments; pigments; Pigments, Turner fluorometer; Polarstern; PS122/1; PS122/1_10-109; PS122/1_10-84; PS122/1_10-85; PS122/1_10-86; PS122/1_10-87; PS122/1_10-88; PS122/1_10-89; PS122/1_11-14; PS122/1_11-2; PS122/1_11-26; PS122/1_11-36; PS122/1_11-48; PS122/1_5-42; PS122/1_5-44; PS122/1_5-87; PS122/1_6-88; PS122/1_6-89; PS122/1_6-90; PS122/1_6-91; PS122/1_6-92; PS122/1_6-94; PS122/1_7-115; PS122/1_7-116; PS122/1_7-117; PS122/1_7-118; PS122/1_7-119; PS122/1_7-132; PS122/1_8-127; PS122/1_8-89; PS122/1_8-90; PS122/1_8-91; PS122/1_8-92; PS122/1_8-93; PS122/1_9-112; PS122/1_9-82; PS122/1_9-83; PS122/1_9-84; PS122/1_9-85; PS122/1_9-86; PS122/3; PS122/3_29-78; PS122/3_29-89; PS122/3_30-15; PS122/3_30-49; PS122/3_30-51; PS122/3_30-63; PS122/3_30-80; PS122/3_30-93; PS122/3_31-14; PS122/3_31-27; PS122/3_31-40; PS122/3_31-48; PS122/3_31-58; PS122/3_31-74; PS122/3_31-83; PS122/3_32-20; PS122/3_32-35; PS122/3_32-4; PS122/3_32-47; PS122/3_32-49; PS122/3_32-69; PS122/3_32-87; PS122/3_33-16; PS122/3_33-49; PS122/3_33-54; PS122/3_33-6; PS122/3_33-77; PS122/3_33-94; PS122/3_33-95; PS122/3_34-19; PS122/3_34-33; PS122/3_34-44; PS122/3_34-48; PS122/3_34-6; PS122/3_34-73; PS122/3_34-82; PS122/3_35-101; PS122/3_35-109; PS122/3_35-27; PS122/3_35-45; PS122/3_35-6; PS122/3_35-68; PS122/3_35-86; PS122/3_36-100; PS122/3_36-126; PS122/3_36-136; PS122/3_36-33; PS122/3_36-36; PS122/3_36-7; PS122/3_36-71; PS122/3_37-10; PS122/3_37-106; PS122/3_37-107; PS122/3_37-113; PS122/3_37-13; PS122/3_37-43; PS122/3_37-54; PS122/3_38-153; PS122/3_38-154; PS122/3_38-156; PS122/3_38-23; PS122/3_38-29; PS122/3_38-73; PS122/3_39-118; PS122/3_39-119; PS122/3_39-120; PS122/3_39-121; PS122/3_39-122; PS122/3_39-123; PS122/3_39-124; PS122/3_40-23; PS122/3_40-24; PS122/3_40-25; PS122/3_40-56; PS122/3_40-57; PS122/3_40-58; PS122/3_40-59; PS122/3_41-28; PS122/3_41-29; PS122/3_41-30; PS122/3_41-31; PS122/3_41-39; PS122/3_41-43; PS122/3_41-49; PS122/3_42-15; PS122/3_42-2; PS122/3_42-22; PS122/3_42-36; PS122/3_42-37; PS122/3_42-46; PS122/3_42-54; PS122/3_42-59; PS122/3_42-7; PS122/4; PS122/4_44-104; PS122/4_44-117; PS122/4_44-132; PS122/4_44-148; PS122/4_44-163; PS122/4_44-168; PS122/4_44-176; PS122/4_44-192; PS122/4_44-20; PS122/4_44-21; PS122/4_44-212; PS122/4_44-33; PS122/4_44-40; PS122/4_44-41; PS122/4_44-55; PS122/4_44-66; PS122/4_44-84; PS122/4_44-86; PS122/4_44-93; PS122/4_44-94; PS122/4_45-109; PS122/4_45-110; PS122/4_45-111; PS122/4_45-134; PS122/4_45-27; PS122/4_45-28; PS122/4_45-49; PS122/4_46-10; PS122/4_46-156; PS122/4_46-157; PS122/4_46-158; PS122/4_46-159; PS122/4_46-34; PS122/4_46-54; PS122/4_47-141; PS122/4_47-142; PS122/4_47-15; PS122/4_47-30; PS122/4_47-78; PS122/4_47-79; PS122/4_47-95; PS122/4_48-107; PS122/4_48-108; PS122/4_48-109; PS122/4_48-110; PS122/4_48-16; PS122/4_48-181; PS122/4_48-182; PS122/4_49-104; PS122/4_49-13; PS122/4_49-41; PS122/4_49-42; PS122/4_49-60; PS122/4_49-65; PS122/4_49-84; PS122/4_50-15; PS122/4_50-23; PS122/4_50-33; PS122/4_50-46; PS122/4_50-54; PS122/4_50-6; PS122/4_50-60; PS122/4_50-63; PS122/4_50-76; PS122/5; PS122/5_59-118; PS122/5_59-131; PS122/5_59-150; PS122/5_59-157; PS122/5_59-165; PS122/5_59-166; PS122/5_59-177; PS122/5_59-190; PS122/5_59-205; PS122/5_59-221; PS122/5_59-24; PS122/5_59-257; PS122/5_59-283; PS122/5_59-289; PS122/5_59-3; PS122/5_59-34; PS122/5_59-385; PS122/5_59-386; PS122/5_59-387; PS122/5_59-388; PS122/5_59-48; PS122/5_59-49; PS122/5_59-52; PS122/5_59-54; PS122/5_59-56; PS122/5_59-71; PS122/5_59-9; PS122/5_60-132; PS122/5_60-252; PS122/5_60-253; PS122/5_60-254; PS122/5_60-255; PS122/5_60-256; PS122/5_60-257; PS122/5_61-120; PS122/5_61-121; PS122/5_61-122; PS122/5_61-306; PS122/5_61-307; PS122/5_61-308; PS122/5_61-309; PS122/5_62-245; PS122/5_62-246; PS122/5_62-247; PS122/5_62-248; PS122/5_62-249; PS122/5_62-250; PS122/5_62-251; PS122/5_63-113; PS122/5_63-114; PS122/5_63-147; PS122/5_63-148; PS122/5_63-149; PS122/5_63-22; PS122/5_63-23; PS122/5_63-26; PS122/5_63-65; PS122/5_63-67; PS122/5_63-79; Tap; TAP; under ice; Underway water sampling; UWS; Volume
    Materialart: Dataset
    Format: text/tab-separated-values, 3863 data points
    Standort Signatur Einschränkungen Verfügbarkeit
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  • 2
    Publikationsdatum: 2023-12-12
    Beschreibung: Concentrations of Chlorophyll a and phaeopigments from CTD-rosette casts during the MOSAiC (PS122) drift expedition in the central Arctic Ocean. 2-4L of water were filtered onto precombusted GF/F filters (nominal pore size 0.7µm) and frozen at -80°C. Samples were subsequently extracted in 90°C acetone,homogenized using a cell mill, and meaured on the following day using a Turner flourometer, followed by an acidification step to determine pheopigments (see Knap et al. 1994 for details and calculations). Samples were collected roughly once per week from end of October 2019 to beginning of October 2020.
    Schlagwort(e): Acidification method according to Knap et al. (1996); Activity description; Arctic; Arctic Ocean; Cast number; Chl-a; Chlorophyll a; Collector; CTD/Rosette; CTD-RO; DATE/TIME; DEPTH, water; Device type; Event label; Feature; LATITUDE; Leg Number; LONGITUDE; MOSAiC; MOSAiC_ECO; MOSAiC20192020; Multidisciplinary drifting Observatory for the Study of Arctic Climate; phaeopigments; Phaeopigments; Phytoplankton; pigments; Pigments, Turner fluorometer; Polarstern; PS122/1; PS122/1_10-44; PS122/1_5-40; PS122/1_5-59; PS122/1_6-58; PS122/1_7-49; PS122/1_8-46; PS122/1_9-50; PS122/2; PS122/2_17-41; PS122/2_18-34; PS122/2_19-56; PS122/2_20-46; PS122/2_21-1; PS122/2_21-65; PS122/2_22-47; PS122/2_23-63; PS122/2_24-4; PS122/2_25-54; PS122/3; PS122/3_30-41; PS122/3_30-53; PS122/3_31-39; PS122/3_31-59; PS122/3_32-75; PS122/3_33-69; PS122/3_34-65; PS122/3_34-66; PS122/3_34-77; PS122/3_35-63; PS122/3_36-81; PS122/3_37-45; PS122/3_38-54; PS122/3_39-51; PS122/3_40-36; PS122/4; PS122/4_44-184; PS122/4_44-67; PS122/4_45-100; PS122/4_45-31; PS122/4_45-75; PS122/4_45-79; PS122/4_45-82; PS122/4_45-85; PS122/4_45-96; PS122/4_46-60; PS122/4_47-52; PS122/4_48-62; PS122/4_49-25; PS122/5; PS122/5_59-274; PS122/5_59-306; PS122/5_59-357; PS122/5_59-72; PS122/5_60-69; PS122/5_60-89; PS122/5_61-161; PS122/5_62-91; PS122/5_63-53; Sample code/label
    Materialart: Dataset
    Format: text/tab-separated-values, 2273 data points
    Standort Signatur Einschränkungen Verfügbarkeit
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  • 3
    Publikationsdatum: 2024-05-11
    Beschreibung: Here we present the concentrations of inorganic nutrients, dissolved organic carbon, nitrogen and phophorus and dissolved inorganic carbon (DIC) from discrete water samples collected with a CTD-rosette during the European Iron Fertilization Experiment (EIFEX). The experiment was carried out from February 11 to March 20, 2004 in the 60-km diameter, rotating core of an eddy, formed by a meander of the Antarctic Polar Front (centred at around 49°10' S and 2°10' E). Samples were taken within the eddy inside and outside the fertilized patch, and in a few cases outside the eddy. Inorganic nutrients (silicate, phosphate, nitrate, nitrite and ammonium) were measured with a Technicon Autoanalyser II system using standard methods. Dissolved organic carbon (DOC) was determined by high temperature combustion using a TOC-VCPH/CPN (Shimadzu) according to Skoog et al. (1997). Dissolved organic nitrogen (DON) was measured on an Evolution continuous flow analyser (Alliance Instruments) after Valderrama (1981). Dissolved inorganic carbon was measured by coulometric titration (Johnson et al., 1987) using a SOMMA system with gas loop calibration with a reproducibility of 2 mmol/kg. DIC was calibrated against certified reference materials from Andrew Dickson at Scripps Institution of Oceanography (SIO).
    Schlagwort(e): Ammonium; ANT XXI/3; ANT-XXI/3; Auto-analyzer II, Technicon; Carbon, inorganic, dissolved; Carbon, organic, dissolved; Cast number; Continuous flow analyser, Alliance Instruments, Evolution; Method according to Valderrama (1981); Coulometric titration according to Johnson et al. (1987); CTD/Rosette; CTD-RO; DATE/TIME; DEPTH, water; dissolved in organic carbon (DIC); Dissolved Organic Matter; Duration, number of days; Event label; GOFLO; Go-Flo bottles; LATITUDE; LONGITUDE; Nitrate; Nitrite; Nitrogen, organic, dissolved; particulate organic matter; Phosphate; Polarstern; Position; PS65/424-3; PS65/424-8; PS65/426-1; PS65/427-1; PS65/452-1; PS65/464-1; PS65/466-2; PS65/470-1; PS65/471-1; PS65/508-16; PS65/508-2; PS65/509-1; PS65/509-13; PS65/511-1; PS65/511-9; PS65/513-3; PS65/513-5; PS65/514-2; PS65/514-6; PS65/515-1; PS65/516-1; PS65/517-1; PS65/518-1; PS65/519-1; PS65/520-1; PS65/521-1; PS65/522-1; PS65/523-1; PS65/524-1; PS65/525-1; PS65/526-1; PS65/527-1; PS65/528-1; PS65/529-1; PS65/530-1; PS65/531-1; PS65/532-1; PS65/533-1; PS65/534-1; PS65/535-1; PS65/536-1; PS65/537-1; PS65/538-1; PS65/539-1; PS65/540-1; PS65/541-1; PS65/543-10; PS65/543-14; PS65/543-15; PS65/543-8; PS65/544-11; PS65/544-14; PS65/544-18; PS65/544-24; PS65/544-29; PS65/544-35; PS65/544-42; PS65/544-48; PS65/544-5; PS65/544-53; PS65/544-56; PS65/544-60; PS65/544-63; PS65/544-7; PS65/544-9; PS65/545-1; PS65/546-14; PS65/546-2; PS65/546-5; PS65/553-10; PS65/553-3; PS65/553-5; PS65/559-1; PS65/570-11; PS65/570-2; PS65/570-4; PS65/570-7; PS65/572-1; PS65/573-1; PS65/574-1; PS65/580-10; PS65/580-2; PS65/580-4; PS65/580-6; PS65/581-1; PS65/583-1; PS65/584-1; PS65/585-1; PS65/587-1; PS65/587-10; PS65/587-3; PS65/588-1; PS65/591-1; PS65/591-3; PS65/592-1; PS65/593-12; PS65/593-3; PS65/593-6; PS65 EIFEX; Silicate; South Atlantic Ocean; Station label; Total organic carbon analyzer, Schimadzu, TOC-VCPH/CPN; HTCO method according to Skoog et al. (1997)
    Materialart: Dataset
    Format: text/tab-separated-values, 9707 data points
    Standort Signatur Einschränkungen Verfügbarkeit
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  • 4
    Publikationsdatum: 2024-05-11
    Beschreibung: Here we present concentrations of chlorophyll a, phaeopigments, particulate organic carbon and nitrogen from water samples collected at discrete depths with a CTD-rosette during the European Iron Fertilization Experiment (EIFEX). The experiment was carried out from February 11 to March 20, 2004 in the 60-km diameter, rotating core of an eddy, formed by a meander of the Antarctic Polar Front (centred at around 49°10' S and 2°10' E). Samples were taken within the eddy inside and outside the fertilized patch, and in a few cases outside the eddy.Chlorophyll concentrations were determined by fluorometry using a Turner Design Model 10-AU digital fluorometer. Sampling, measurements and calibration of the fluorometer was carried out following the JGOFS protocol procedure (Knap et al, 1996). Results of the fluorometer calibration diverged by 5% between beginning and end of the cruise. Chlorophyll a content was calculated using average parameter values from the two calibrations. Measurement uncertainty was estimated from triplicate water samples taken from depths ranging between 10 and 100 m depth and averaged 5% of measured values. Samples for particulate organic carbon and nitrogen (POC and PON) were filtered onto precombusted Whatman GF/F filters and processed following recommendations by Lorrain et al. (2003). Samples were measured independently on three different analysers: a CN2500 CHN Analyser (Thermo Finnigan MAT) coupled to a Delta+ mass spectrometer (Thermo Finnigan MAT) via Conflo II interface (Thermo Finnigan MAT), a Carlo-Erba NA-1500 Series II elemental analyzer coupled to a Finnegan Delta+ mass spectrometer and a Euro EA Elemental Analyser. Differences due to methods were within the range of measurement variability (below 2%). The particulate organic phosphorus (POP) content was determined colorimetrically using the method from Hansen and Koroleff (1999; measurement variability 4%). Biogenic silica (BSi) was measured following the wet alkaline digestion method according to Müller and Schneider (1993; measurement variability 2%).
    Schlagwort(e): ANT XXI/3; ANT-XXI/3; Biogenic silica; Carbon, organic, particulate; Cast number; Chlorophyll a; Colorimetry according to Hansen and Koroleff (1999); CTD/Rosette; CTD-RO; DATE/TIME; DEPTH, water; dissolved in organic carbon (DIC); Dissolved Organic Matter; Duration, number of days; Elemental analyzer; Decarbonation and preservation method according to Lorrain et al. (2003); Event label; Fluorometer, Turner Designs, 10-AU; According to Knap et al. (1996); LATITUDE; LONGITUDE; Nitrogen, organic, particulate; particulate organic matter; Phaeopigments; Phosphorus, organic, particulate; Polarstern; Position; PS65/424-3; PS65/426-1; PS65/427-1; PS65/452-1; PS65/464-1; PS65/466-2; PS65/470-1; PS65/474-1; PS65/508-2; PS65/509-1; PS65/511-1; PS65/513-3; PS65/514-2; PS65/515-1; PS65/516-1; PS65/518-1; PS65/519-1; PS65/520-1; PS65/521-1; PS65/522-1; PS65/523-1; PS65/524-1; PS65/525-1; PS65/526-1; PS65/527-1; PS65/528-1; PS65/529-1; PS65/530-1; PS65/533-1; PS65/534-1; PS65/535-1; PS65/536-1; PS65/537-1; PS65/538-1; PS65/539-1; PS65/540-1; PS65/541-1; PS65/543-10; PS65/544-11; PS65/544-14; PS65/544-15; PS65/544-18; PS65/544-20; PS65/544-24; PS65/544-26; PS65/544-29; PS65/544-3; PS65/544-32; PS65/544-35; PS65/544-42; PS65/544-48; PS65/544-5; PS65/544-53; PS65/544-56; PS65/544-7; PS65/544-9; PS65/545-1; PS65/546-2; PS65/553-3; PS65/555-1; PS65/556-1; PS65/557-1; PS65/558-1; PS65/559-1; PS65/560-2; PS65/561-1; PS65/562-2; PS65/563-1; PS65/564-1; PS65/565-1; PS65/570-4; PS65/572-1; PS65/573-1; PS65/580-2; PS65/581-1; PS65/586-3; PS65/587-1; PS65/588-1; PS65/591-1; PS65/592-1; PS65/593-3; PS65 EIFEX; South Atlantic Ocean; Station label; Wet alkaline digestion method according to Müller and Schneider (1993)
    Materialart: Dataset
    Format: text/tab-separated-values, 5554 data points
    Standort Signatur Einschränkungen Verfügbarkeit
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  • 5
    Publikationsdatum: 2024-05-27
    Beschreibung: Cell division of the coccolithophore Emiliania huxleyi and other phytoplankton typically becomes entrained to diel light/dark cycles under laboratory conditions, with division occurring primarily during dark phases and production occurring during light phases. Under these conditions, the increase in a culture's cell and biomass concentrations deviates from an exponential function on time scales 〈 24 h. We here present a dataset of short-term changes in cell and biomass concentrations of fast dividing, dilute-batch cultures of E. huxleyi grown under a 16:8 h light/dark cycle. This dataset was used to derive linear models describing the diel course in the concentrations of cells, particulate organic carbon (POC) and particulate inorganic carbon (PIC) and for the calculation of daily means of cellular quotas and production rates in Kottmeier et al. (2020). We also present the given seawater carbonate chemistry as well as cellular quotas of particulate organic nitrogen (PON) and chlorophyll a (Chl. a), and the ratios of PIC:POC, POC:PON, POC:cell volume and Chl. a:POC in the course of the 24 h sampling period.
    Schlagwort(e): 1; Alkalinity, potentiometric; Alkalinity, total; Alkalinity, total, standard deviation; Calculated using CO2SYS; Carbon, inorganic, dissolved; Carbon, inorganic, particulate, per cell; Carbon, inorganic, particulate, relative concentration; Carbon, organic, particulate; Carbon, organic, particulate, per cell; Carbon, organic, particulate, relative concentration; Carbon, organic, particulate/Nitrogen, organic, particulate ratio; Carbon dioxide, partial pressure; Carbon dioxide, partial pressure, standard deviation; Cell concentration, relative; Chlorophyll a/particulate organic carbon ratio; Chlorophyll a per cell; Colorimetric autoanalysis; Consumption of carbon, inorganic, dissolved, standard deviation; Coulter counter, Beckman Coulter, Multisizer 3; Elemental analyzer, EuroVector, EA 3000; Exponential growth; Fluorometer, Turner Design, TD-700; Growth rate; Growth rate, standard deviation; Hand net; HN; Identification; Irradiance; Light/dark cycles; Light meter; LM; Nitrogen, organic, particulate, per cell; Particulate inorganic carbon/particulate organic carbon ratio; pH; pH, standard deviation; Phase; Phased cell division; PIC production; POC production; Potentiometric; Registration number of species; Salinity; SALINO; Salinometer; SO136; SO136_006-A_HPN; Sonne; Species; Stage; Strain; TASQWA; Temperature, water; Temperature sensor; Time in hours; Treatment: light:dark cycle; Uniform resource locator/link to reference
    Materialart: Dataset
    Format: text/tab-separated-values, 1983 data points
    Standort Signatur Einschränkungen Verfügbarkeit
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  • 6
    Publikationsdatum: 2023-12-15
    Beschreibung: The lithium (Li) isotopic composition of carbonates is considered to be a reliable archive of past seawater Li isotopic compositions, which are useful as a tracer of silicate weathering. However, δ7Li values have been shown to be dependent on either pH or DIC in two studies using similar species of large, benthic foraminifera from the genus Amphistegina. To resolve this issue, we conducted culture experiments on Amphistegina lessonii in decoupled pH–DIC conditions, under two different light treatments, and with normal or Li-enriched seawater. The δ7Li values and Li/Ca ratios in the foraminifera tests were analysed by ion microprobe and LA-ICP-MS, respectively. No links between either the pH or DIC and δ7Li or Li/Ca values were observed for any of the treatments, and growth rates also did not seem to influence the Li incorporation or isotopic fractionation, contrary to observations from inorganic carbonate-precipitation experiments. Overall, these findings appear to support the use of Li isotopes in large benthic foraminifera to reconstruct past seawater chemistry and to infer changes in chemical weathering during carbon-cycle perturbations. Keywords: δ7Li; Li/Ca; lithium; large benthic foraminifera; culture experiments; pH; DIC; geochemical proxies
    Repository-Name: EPIC Alfred Wegener Institut
    Materialart: Article , isiRev
    Format: application/pdf
    Standort Signatur Einschränkungen Verfügbarkeit
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