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  • 2020-2024  (166,575)
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  • 1
    Publication Date: 2024-06-02
    Description: Underway optical chlorophyll-a and turbidity data were collected along the cruise track with Sea-Bird Scientific ECO FLNTU sensors installed within two autonomous measurement systems, called self-cleaning monitoring boxes (SMBs). The SMBs measure alternatingly. While one box is measuring, the other one is being cleaned. At the beginning of the transect, the boxes switched to operation every three hours, later, while the ship is transecting the Pacific Gyre, the cleaning interval was changed to only every 24 hours. The water inlet for the SMBs is at about 4 m depth. The data were quality controlled and the chlorophyll-a data were additionally calibrated using discrete water samples. In situ chlorophyll-a samples were collected by the scientific party from Niskin bottles during CTD stations and underway using a tow fish. Chlorophyll-a of these samples was determined in the lab on board using a bench top fluorometer. Details on all quality control steps, the calibration, as well as a comparison to satellite data can be found in the data processing report. The resulting data set contains the original data and corresponding quality flags and, in case of chlorophyll-a, additionally the calibrated data plus quality flag. The data source is given through the name of the active SMB. The data set contains data during transect and station. We recommend to use ship's speed to filter for only transect data.
    Keywords: Chlorophyll a; chlorophyll-a; DAM; DAM_Underway; DAM Underway Research Data; Data quality control procedures according to Copernicus Marine in situ TAC BGC quality control group (2021); DATE/TIME; DEPTH, water; EPA 445; Fluorescence; Fluorometer, Sea-Bird Scientific, ECO FLNTU; Fluorometer, Sea-Bird Scientific, ECO FLNTU; Calibration with samples measured according to Arar and Collins (1997); GEOTRACES GP21; ICBM; LATITUDE; LONGITUDE; Measurement container; Quality flag, chlorophyll a; Quality flag, turbidity; Ship speed; SO289; SO289_0_Underway-7; Sonne_2; turbidity; Turbidity (Nephelometric turbidity unit); Underway Measurement
    Type: Dataset
    Format: text/tab-separated-values, 470752 data points
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  • 2
    Publication Date: 2024-06-02
    Description: Manganese (Mn) is an essential micro-nutrient that can limit or, along with iron (Fe), co-limit phytoplankton growth in the ocean. Glacier meltwater is thought to be a key source of trace metals to high latitude coastal systems, but little is known about the nature of Mn delivered to glacially-influenced fjords and adjacent coastal waters. In this work, we combine in-situ dissolved Mn (dMn) measurements of surface waters with Mn K-edge X-ray absorption spectroscopy (XAS) data of suspended particles in four fjords of West Greenland. Data were collected from transects of up to 100 km in fjords with different underlying bedrock geology from 64 to 70°N. We found that dMn concentrations generally decreased conservatively with increasing salinity (from 80-120 nM at salinity 〈8 to 〈40 nM at salinities 〉25). Dissolved Fe (dFe) trends in these fjords similarly declined with increasing distance from glacier outflows (declining from 〉20 nM to 〈8 nM). However, the dMn/dFe ratio increased rapidly likely due to the greater stability of dMn at intermediate salinities (i.e. 10 – 20) compared to rapid precipitation of dFe across the salinity gradient. The XAS data indicated a widespread presence of Mn(II)-rich suspended particles near fjord surfaces, with structures akin to Mn(II)-bearing phyllosilicates. However, a distinct increase in Mn oxidation state with depth and the predominance of birnessite-like Mn(IV) oxides was observed for suspended particles in a fjord with tertiary basalt geology. The similar dMn behaviour in fjords with different suspended particle Mn speciation (i.e., Mn(II)-bearing phyllosilicates and Mn(IV)-rich birnessite) is consistent with the decoupling of dissolved and particulate Mn and suggests that dMn concentrations on the scale of these fjords are controlled primarily by dilution of a freshwater dMn source rather than exchange between dissolved and particle phases. This work provides new insights into the Mn cycle in high latitude coastal waters, where small changes in the relative availabilities of dMn, dFe and macronutrients may affect the identity of the nutrient(s) proximally limiting primary production.
    Type: Article , PeerReviewed
    Format: text
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    Format: other
    Format: other
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  • 3
    Publication Date: 2024-06-01
    Description: The data are a processed and interpolated P-Cable 3D seismic data cube. The data were collected during expedition POS515 with the research vessel POSEIDON (Riedel et al., 2017) in the Mediterranean Sea, Calabrian Arc offshore southern Italy (map under further details). Seismic source was a Generator-Injector airgun fired in harmonic GI mode with generator and injector volume of 105 cubic inches. The source was towed at a nominal depth of 2 m beneath the sea surface. We deployed a P-Cable system made from 12 parallel streamers (each 12. 5 m in length). Details on the towed geometry are given in Figure 30 of the cruise report (Riedel et al., 2017). The P-Cable data were acquired over the course of 6 days during POS515 starting from 13:45 on July 5, 2017 until 12:06 on July11, 2017 (all CET). Processing included: 3D geometry application, trace editing, static time corrections, band-pass filtering, sorting to common midpoint gathers, normal moveout correction (1520 m/s velocity ), and stacking. The stacked 3D cube was then interpolated to fill any empty bins. Afterwards, Stolt time migration (1550 m/s) was performed, first inline, then crossline direction. The dataset has a horizontal resolution of 3.125 m (bin size) and a dominant frequency of ~100 Hz.
    Keywords: 3D seismic P-Cable data; Binary Object; Binary Object (File Size); Binary Object (MD5 Hash); Binary Object (Media Type); CALVADOS; File content; P-Cable; P-Cable 3D Seismic; P-Cable 3D seismic cube; POS515; POS515_59-2; Poseidon; Sartori mud volcano
    Type: Dataset
    Format: text/tab-separated-values, 2 data points
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  • 4
    Publication Date: 2024-06-01
    Description: The data set contains 13 2D multichannel seismic lines acquired across Poseidon mud volcano chain, Caalbrian Arc, offshore southern Italy. Data were processed onboard during expedition POS515 with R/V POSEIDON. These lines were also recorded on 12 OBS. Details see cruise report (Riedel et al., 2017). Main processing steps include: Geometry definition, Common-Mid-(CMP) Point sorting (1.5625 m bin-space), Normal-Moveout-Corrention (NMO) using a constant velocity of 1500 m/s and Stacking Stolt-Migration (in time) with constant velocity of 1500 m/s. Data processing was completed onboard using the SU processing package. Seismic Surveying at Poseidon mudvlcano started with line P4001 on July 3, 2017 (08:22 am, CET) at 17°40.12'E, 38°21.58N. The last line acquired in this sequence is line P6010. Surveying ended on July 5, 2017 at 04:00 am (CET) at 17°43.12'E, 38°18.96'N.
    Keywords: Binary Object; Binary Object (File Size); Binary Object (MD5 Hash); Binary Object (Media Type); Calabrian accretionary prism; CALVADOS; File content; Mediterranean Sea, Eastern Basin; multichannel reflection seismics; POS515; POS515_45-1; POS515_46-1; Poseidon; SEIS; Seismic; Seismic reflection profile; SEISREFL
    Type: Dataset
    Format: text/tab-separated-values, 26 data points
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  • 5
    Publication Date: 2024-06-01
    Description: Data presented here were collected between January 2022 to November 2022 within the research unit DynaCom (Spatial community ecology in highly dynamic landscapes: From island biogeography to metaecosystems) of the Universities of Oldenburg, Göttingen, and Münster, the iDiv Leipzig and the Nationalpark Niedersächsisches Wattenmeer. Experimental islands and saltmarsh enclosed plots were created in the back barrier tidal flat and in the saltmarsh zone of the island of Spiekeroog. Sediment samples for the determination of pH, water content and loss on ignition were taken bi-/monthly in surface sediments (0-3 cm depth) from the experimental plots. Samples were stored dark and cool (8°C) until measurement. Samples were measured in the laboratory within two months after sampling. Water content (w, [-]) was determined by first weighing the fresh sample (mf; ~ 3-7 g) in pre-weighed aluminium trays and than placed in the drying chamber at 105 °C for 12 hours. After placing samples in the exsiccator for 60 min., samples were re-weight to determine dry weight (md). Water content was calculated using w = (mf - md) / md . Afterwards, samples were placed in the muffle furnace for 2 hours at 430 °C within their aluminium trays, and placed again in the exsiccator for 60 min. Samples were re-weighed to determine the new dry weight (mgl) to calculate loss on ignition (LOI, [%]) using LOI = ((md – mgl) / md ) * 100 . Values of pH were measured according to DIN ISO 10390. Therefore, soil samples were weighed in pre-weighed Falcon™ 50 mL conical centrifuge tubes. Sediment samples were homogenized using a pestle. Ultrapure water was used to measure pH directly within the tubes using a HQ40D digital two channel multi meter and an Intellical PHC101 field low maintenance gel filled pH electrode (Hach Lange GmbH, Germany). The pH electrode was calibrated before measurement using singlet pH buffer sets (pH 4.01, 7.00, 10.01) for single use (Hach Lange GmbH, Germany). Post-processing of measured values were done using MATLAB (R2018a). Quality control was performed by (a) visually checks, and hence (b) the classification into quality control flags using quality check algorithms.
    Keywords: BEFmate; BEFmate_C1low; BEFmate_C1pio; BEFmate_C1upp; BEFmate_C2low; BEFmate_C2pio; BEFmate_C2upp; BEFmate_C3low; BEFmate_C3pio; BEFmate_C3upp; BEFmate_C4low; BEFmate_C4pio; BEFmate_C4upp; BEFmate_C5low; BEFmate_C5pio; BEFmate_C5upp; BEFmate_C6low; BEFmate_C6pio; BEFmate_C6upp; BEFmate_I10low; BEFmate_I10pio; BEFmate_I10upp; BEFmate_I11low; BEFmate_I11pio; BEFmate_I11upp; BEFmate_I12low; BEFmate_I12pio; BEFmate_I12upp; BEFmate_I1low; BEFmate_I1pio; BEFmate_I1upp; BEFmate_I2low; BEFmate_I2pio; BEFmate_I2upp; BEFmate_I3low; BEFmate_I3pio; BEFmate_I3upp; BEFmate_I4low; BEFmate_I4pio; BEFmate_I4upp; BEFmate_I5low; BEFmate_I5pio; BEFmate_I5upp; BEFmate_I6low; BEFmate_I6pio; BEFmate_I6upp; BEFmate_I7low; BEFmate_I7pio; BEFmate_I7upp; BEFmate_I8low; BEFmate_I8pio; BEFmate_I8upp; BEFmate_I9low; BEFmate_I9pio; BEFmate_I9upp; BEFmate_S10low; BEFmate_S10pio; BEFmate_S10upp; BEFmate_S11low; BEFmate_S11pio; BEFmate_S11upp; BEFmate_S12low; BEFmate_S12pio; BEFmate_S12upp; BEFmate_S1low; BEFmate_S1pio; BEFmate_S1upp; BEFmate_S2low; BEFmate_S2pio; BEFmate_S2upp; BEFmate_S3low; BEFmate_S3pio; BEFmate_S3upp; BEFmate_S4low; BEFmate_S4pio; BEFmate_S4upp; BEFmate_S5low; BEFmate_S5pio; BEFmate_S5upp; BEFmate_S6low; BEFmate_S6pio; BEFmate_S6upp; BEFmate_S7low; BEFmate_S7pio; BEFmate_S7upp; BEFmate_S8low; BEFmate_S8pio; BEFmate_S8upp; BEFmate_S9low; BEFmate_S9pio; BEFmate_S9upp; BEFmate_Watt; biodiversity - ecosystem functioning; Calculated; DATE/TIME; DEPTH, sediment/rock; Depth, sediment/rock, bottom/maximum; Depth, sediment/rock, top/minimum; DynaCom; ELEVATION; Event label; experimental islands; FOR 2716: Spatial community ecology in highly dynamic landscapes: from island biogeography to metaecosystems; LATITUDE; LONGITUDE; loss on ignition; Loss on ignition; Metacommunity; MULT; Multiple investigations; off Spiekeroog, German Bight, North Sea; pH; Plot; Portable 2-channel multimeter, Hach, HQ40D; Quality flag, loss on ignition; Quality flag, pH; Quality flag, water content; salt marsh; Sample ID; Sampling date; SCO; Spiekeroog; Spiekeroog Coastal Observatory; water content; Water content, relative
    Type: Dataset
    Format: text/tab-separated-values, 11310 data points
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  • 6
    Publication Date: 2024-06-01
    Keywords: AGE; Aluminium/Calcium ratio; Barium/Calcium ratio; Cueva Larga, Puerto Rico; DISTANCE; Isotope ratio mass spectrometer (IRMS) with a GasBench; LA-ICP-MS, Laser-ablation inductively coupled plasma mass spectrometer; Magnesium/Calcium ratio; Phosphorus/Calcium ratio; PR-LA-1; Sample ID; speleothem; Speleothem sample; SPS; Stable isotopes; Strontium/Calcium ratio; Thorium/Calcium ratio; trace elements; Uranium/Calcium ratio; δ13C, carbonate; δ18O, carbonate
    Type: Dataset
    Format: text/tab-separated-values, 20317 data points
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  • 7
    Publication Date: 2024-06-01
    Description: In July 2022 within the framework of an Alfred-Wegener-Institute-managed expedition and the Nunataryuk project, sediment core YC22_MR_7 was taken off the coast of Herschel Island, Canada, using a hand corer. Data sets were obtained to investigate carbon feedback from the sediments to the water column and atmosphere, using DIC concentrations and isotopic values. The local sediments are supplied primarily by organic carbon previously stored in adjacent permafrost soils (biomarker and bulk data), which erode and redeposit quickly (age model) on the ocean floor. The acquired data includes: 1) Sediment data: Bulk total organic carbon content (Lamping et al., 2021) and its isotopic values for 13C (Brodie et al., 2011; Werner & Brand, 2001) and 14C (Mollenhauer et al., 2021). 2) Biomarker data: Quantifying alkanes (CPI) , and fatty acids (TAR ratio) as described by Wei et al. (2020), Glycerol dialkyl glycerol tetraethers (GDGTs basis for BIT-Index) after Hopmans et al. (2016), Hopanes (fßß) following instructions by Meyer et al., (2019), and Sterols (Dinosterol) after Dauner et al. (2022).
    Keywords: 4alpha,23,24-Trimethyl-5alpha-cholest-22E-en-3beta-ol; 4alpha,23,24-Trimethyl-5alpha-cholest-22E-en-3beta-ol, standard deviation; AWI Arctic Land Expedition; Branched and isoprenoid tetraether index; Branched and isoprenoid tetraether index, standard deviation; C31 beta beta R homohopane relative to diagenetic isomers, fractional abundance; C31 beta beta R homohopane relative to diagenetic isomers, fractional abundance, standard deviation; CA-Land_2022_YukonCoast; CA-Land_2022_YukonCoast_MR_7; Carbon, organic, total; Carbon, organic, total, standard deviation; Carbon Preference Index; Carbon Preference Index, standard deviation; DEPTH, sediment/rock; Fraction modern carbon; Fraction modern carbon, standard deviation; Hand corer; HCOR; Herschel Island, Yukon Territory, Canada; NUNATARYUK; NUNATARYUK, Permafrost thaw and the changing Arctic coast, science for socioeconomic adaptation; Sample ID; Terrigenous/aquatic ratio; Terrigenous/aquatic ratio, standard deviation; YC22_MR_7; Yukon Coast 2022; δ13C, total organic carbon; δ13C, total organic carbon, standard deviation
    Type: Dataset
    Format: text/tab-separated-values, 350 data points
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  • 8
    Publication Date: 2024-06-01
    Keywords: Area/locality; Atlantic dust transport; Cerium; Dysprosium; Erbium; Europium; Europium anomaly; Event label; From literature; Gadolinium; Holmium; isotope fingerprinting; Lanthanum; Latitude of event; Lead-206/Lead-204 ratio; Lead-206/Lead-204 ratio, standard error; Lead-207/Lead-204 ratio; Lead-207/Lead-204 ratio, standard error; Lead-208/Lead-204 ratio; Lead-208/Lead-204 ratio, standard error; Location; Longitude of event; Lutetium; mineral dust provenance; Neodymium; North African soils; Praseodymium; PSA_BD_34BOT25; PSA_BD_BEG1; PSA_BD_BEG2; PSA_BD_BEG3; PSA_BD_Bod_43.5; PSA_BD_Bod_44; PSA_BD_Bod_44B; PSA_BD_Bod_44C; PSA_BD_Bod_44D; PSA_BD_Bod_51; PSA_BD_Bod_54A; PSA_BD_BOD1; PSA_BD_Bod54B; PSA_BD_BODI; PSA_BD_BODU; PSA_BD_CH17; PSA_BD_CH34; PSA_BD_CH38; PSA_BD_CH39; PSA_BD_CH50; PSA_BD_CH56; PSA_BD_CH62; PSA_BD_CH75; PSA_BD_EN1; PSA_BD_EN12; PSA_BD_EN13; PSA_BD_EN14; PSA_BD_EN15; PSA_BD_EN2; PSA_BD_EN3; PSA_BD_EN4; PSA_BD_EN5; PSA_BD_EN6; PSA_BD_EN7; PSA_BD_EN8; PSA_BD_EN9; PSA_BD_Faya_Largeau_bulk; PSA_BD_Faya_Largeau_residue; PSA_BD_Harmattan_bulk; PSA_BD_Harmattan_residue; PSA_BD_M_bulk; PSA_BD_M_residue; PSA_BD_NPS_bulk; PSA_BD_NPS_residue; PSA_BD_R_bulk; PSA_BD_RIVER1; PSA_BD_RIVER2; PSA_LAM_Lybia; PSA_LAM_N05; PSA_LAM_N19; PSA_LAM_N26; PSA_LAM_N35; PSA_LAM_N36; PSA_LAM_Tunisia; PSA_LE_Assouan_bank; PSA_LE_Assouan_island; PSA_LE_EGP11A; PSA_LE_EGP12A; PSA_LE_EGP13A; PSA_LE_EGP14A; PSA_LE_EGP15A; PSA_LE_EGP16A; PSA_LE_EGP18A; PSA_LE_EGP20A; PSA_LE_EGP21A; PSA_LE_EGP27A; PSA_LE_EGP28A; PSA_LE_EGP29A; PSA_LE_EGP2A; PSA_LE_Egypt#1; PSA_LE_Egypt#2; PSA_LE_LIB1; PSA_LE_SD1; PSA_LE_SD10; PSA_LE_SD2; PSA_LE_SD3; PSA_LE_SD4; PSA_LE_SD6; PSA_LE_SD7; PSA_LE_SD8; PSA_LE_SD9; PSA_Ma_Atar; PSA_Ma_Elm; PSA_Ma_Erg; PSA_Ma_Est; PSA_Ma_Foum; PSA_Ma_Kay; PSA_Ma_Kif; PSA_Ma_Mauritania; PSA_Ma_Nou; PSA_Ma_Smara; PSA_Ma_Tamba; PSA_Ma_Tich; PSA_Ma_Wouerat; PSA_MC_AGF; PSA_MC_SAHEL10A; PSA_MC_SAHEL11A; PSA_MC_SAHEL12A; PSA_MC_SAHEL13A; PSA_MC_SAHEL14A; PSA_MC_SAHEL15A; PSA_MC_SAHEL17A; PSA_MC_SAHEL19A; PSA_MC_SAHEL1A; PSA_MC_SAHEL1A_1; PSA_MC_SAHEL1A_2; PSA_MC_SAHEL2A; PSA_MC_SAHEL3A; PSA_MC_SAHEL4A; PSA_MC_SAHEL6A; PSA_MC_SAHEL7A; PSA_MC_SAHEL8A; PSA_MC_SAHEL9A; PSA_Non_rep_LOME10A; PSA_Non_rep_LOME14A; PSA_Non_rep_LOME18A; PSA_Non_rep_LOME1A; PSA_Non_rep_LOME24A; PSA_Non_rep_LOME2A; PSA_Non_rep_LOME4A; PSA_Non_rep_LOME5A; PSA_Non_rep_LOME8A; PSA_WAC_Akjoujt; PSA_WAC_Elra; PSA_WAC_EM; PSA_WAC_Foun; PSA_WAC_IR; PSA_WAC_JB; PSA_WAC_Jraif; PSA_WAC_Lab; PSA_WAC_Mali_Kati; PSA_WAC_MHAMID18; PSA_WAC_MHAMID19; PSA_WAC_MORO10A; PSA_WAC_MORO14A; PSA_WAC_MORO15A; PSA_WAC_MORO16A; PSA_WAC_MORO18A; PSA_WAC_MORO1A; PSA_WAC_MORO20A; PSA_WAC_MORO21A; PSA_WAC_MORO22A; PSA_WAC_MORO23A; PSA_WAC_MORO25B; PSA_WAC_MORO26A; PSA_WAC_MORO27A; PSA_WAC_MORO28A; PSA_WAC_MORO29; PSA_WAC_MORO3A; PSA_WAC_MORO5A; PSA_WAC_MORO6A; PSA_WAC_MORO7A; PSA_WAC_MORO8A; PSA_WAC_Ouj; PSA_WAC_PNBA; PSA_WAC_Ro; PSA_WAC_Sen_Riv; PSA_WAC_Til; PSA_WAC_TL; PSA_WAC_ZAG1; PSA_WAC_ZAG2; rare-earth element pattern; Reference/source; Sahara-Sahel region; Samarium; Sample ID; Sample type; SOILS; Soil sample; Sr-Nd-Pb radiogenic isotopes; Strontium-87/Strontium-86 ratio; Strontium-87/Strontium-86 ratio, standard error; Terbium; Thulium; Ytterbium; ε-Neodymium; ε-Neodymium, standard error
    Type: Dataset
    Format: text/tab-separated-values, 1813 data points
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  • 9
    Publication Date: 2024-06-01
    Description: This dataset presents user-defined tiepoints of the manual alignment of the benthic foraminiferal δ¹⁸O record at ODP Site 980 and 981 to the benthic foraminiferal LR04 δ¹⁸O stack of Lisiecki and Raymo (2005) obtained by Middleton et al. (2024). The benthic foraminiferal δ¹⁸O record at ODP 980 is based on Cibicidoides wuellerstorfi and Cibicides kullenbergi, and was previously published (McManus et al., 1999; Flower et al., 2000; Oppo et al., 1998). The ODP Site 981 data were measured on benthic foraminifera of the genus Cibicidoides (Raymo et al., 2004). The benthic foraminiferal δ¹⁸O records of ODP Site 980 and 981 were spliced together at ~860 ka (Raymo et al., 2004).
    Keywords: 162-980; 162-981; AGE; COMPCORE; Composite Core; DEPTH, sediment/rock; Event label; Joides Resolution; Leg162; Ocean Drilling Program; ODP; South Atlantic Ocean
    Type: Dataset
    Format: text/tab-separated-values, 0 data points
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  • 10
    Publication Date: 2024-06-01
    Description: This dataset presents user-defined tiepoints of the manual alignment of the benthic foraminiferal δ¹⁸O record at ODP Site 1090 to the benthic foraminiferal LR04 δ¹⁸O stack of Lisiecki and Raymo (2005) obtained by Middleton et al. (2024). The benthic foraminiferal δ¹⁸O record is based on Cibicidoides wuellerstorfi and was previously published in Hodell et al. (2000) and Venz and Hodell (2002).
    Keywords: 177-1090; AGE; COMPCORE; Composite Core; DEPTH, sediment/rock; Joides Resolution; Leg177; Ocean Drilling Program; ODP; South Atlantic Ocean
    Type: Dataset
    Format: text/tab-separated-values, 0 data points
    Location Call Number Expected Availability
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