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  • 1
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    Dissolved inorganic carbon and total alkalinity of seawater samples from a Weddell Sea coastal polynya during two tidal observation case studies for RV POLARSTERN expeditions PS89 and PS117 (2022)
    PANGAEA
    Details
    Publication Date: 2023-10-19
    Description: Discrete seawater samples in a Weddell Sea coastal polynya along the Ekström Ice Shelf were collected from two sets of repeat CTD casts, capturing tidal variability in the water column. One set was collected during RV POLARSTERN expedition PS89, between 8 and 11 January 2015. The second set was collected during RV POLARSTERN expedition PS117, between 11 and 12 January 2019. Dissolved inorganic carbon (DIC) and total alkalinity (TA) were measured using coulometric titration and potentiometric titration, respectively, on a VINDTA 3C system. DIC and TA have been normalised to salinity: nDIC and nTA. Nutrients were measured with UV-Vis spectrophotometry and a continuous gas-segmented flow auto-analyser.
    Keywords: Alkalinity, total; ANT-XXX/2; Carbon, inorganic, dissolved; Cast number; Comment; Coulometric titration; Cruise/expedition; CTD/Rosette; CTD/Rosette, ultra clean; CTD-RO; CTD-UC; DATE/TIME; DEPTH, water; Dissolved inorganic carbon; Event label; LATITUDE; LONGITUDE; Nitrate; nutrients; Oxygen; Phosphate; Polarstern; Polynya; Potentiometric titration; PS117; PS117_41-1; PS117_41-10; PS117_41-12; PS117_41-13; PS117_41-4; PS117_41-6; PS117_41-8; PS117_41-9; PS89; PS89/049-11; PS89/049-12; PS89/052-1; PS89/052-10; PS89/052-11; PS89/052-12; PS89/052-2; PS89/052-3; PS89/052-4; PS89/052-5; PS89/052-6; PS89/052-7; PS89/052-8; PS89/052-9; PS89/054-1; PS89/054-2; PS89/054-3; PS89/056-1; PS89/056-2; PS89/056-3; PS89/056-4; PS89/057-1; PS89/057-10; PS89/057-11; PS89/057-12; PS89/057-13; PS89/057-14; PS89/057-15; PS89/057-16; PS89/057-17; PS89/057-18; PS89/057-19; PS89/057-2; PS89/057-20; PS89/057-21; PS89/057-3; PS89/057-4; PS89/057-5; PS89/057-6; PS89/057-7; PS89/057-8; PS89/057-9; Salinity; Silicate; Spectrophotometry; Station label; Temperature, water; Total alkalinity; Weddell Sea
    Type: Dataset
    Format: text/tab-separated-values, 4032 data points
    Location Call Number Expected Availability
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  • 2
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    Algal pigment concentrations in meltponds and leads during the Arctic MOSAiC-expedition (Leg 4 and 5) (2023)
    PANGAEA
    Details
    Publication Date: 2023-11-15
    Description: Algal pigment concentrations were retrieved from meltponds and leads, during Leg 4 and 5 of the MOSAiC expedition (Multidisciplinary drifting Observatory for the Study of Arctic Climate) in 2020. The summer increase in meltpond area and open lead water in the Arctic associated with increased light availability is of specific significance for biological production within the Arctic system (Smith et al. 2023). Over a period of 3.5 months, 46 samples have been collected and analysed. After extraction in 90 % acetone, samples were analysed using high-performance liquid chromatography (HPLC) on a Waters system. Algal pigments contain a multiple set of information. Firstly, pigment concentrations can show the presence of algal biomass in the various water masses sampled. Secondly, marker pigments can reveal seasonal and temporal dynamics in algal community structure, by discerning specific algal classes like diatoms, cryptophytes, haptophytes and chlorophytes that have specific roles in biogeochemical cycles. Thirdly, certain pigments are indicative of the (photo)-physiological state of micro-algae and fourth, degradation products of the main chlorophyll a pigment further give an indication about senescence and grazing in the various habitats.
    Keywords: 19'-Hexanoyloxy-4-ketofucoxanthin; 19-Butanoyloxyfucoxanthin; 19-Hexanoyloxyfucoxanthin; Alloxanthin; alpha-Carotene; Arctic; Arctic Ocean; beta-Carotene; BUCKET; Bucket water sampling; Chlorophyll a, total; Chlorophyll b; Chlorophyll c1+c2; Chlorophyll c3; Comment; community composition; DATE/TIME; DEPTH, water; Diadinoxanthin; Diatoxanthin; Dinoxanthin; Echinenone; Event label; Fucoxanthin; Gear; Gyroxanthin diester; Hand pump; High Performance Liquid Chromatography (HPLC); HP; LATITUDE; leads; LONGITUDE; Lutein; Lycopene; Microalgae; Mosaic; MOSAiC; MOSAiC20192020; Multidisciplinary drifting Observatory for the Study of Arctic Climate; Neoxanthin; Peridinin; Pheophorbides; pigments; Polarstern; ponds; Prasinoxanthin; PS122/4; PS122/4_44-118; PS122/4_47-144; PS122/5; PS122/5_59-200; PS122/5_59-202; PS122/5_59-203; PS122/5_59-207; PS122/5_59-208; PS122/5_59-209; PS122/5_59-210; PS122/5_59-211; PS122/5_59-212; PS122/5_59-213; PS122/5_59-291; PS122/5_59-343; PS122/5_59-344; PS122/5_59-391; PS122/5_59-393; PS122/5_60-130; PS122/5_60-202; PS122/5_60-280; PS122/5_60-64; PS122/5_61-205; PS122/5_61-273; PS122/5_61-278; PS122/5_62-117; PS122/5_62-33; PS122/5_62-40; PS122/5_62-92; PS122/5_63-82; PS122/5_63-84; Sample code/label; Violaxanthin; Water sample; WS; Zeaxanthin
    Type: Dataset
    Format: text/tab-separated-values, 1242 data points
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  • 3
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    Dissolved oxygen of seawater samples during RV POLARSTERN expedition PS122 – MOSAiC (2023)
    PANGAEA
    Details
    Publication Date: 2023-11-24
    Description: Discrete seawater samples for total dissolved oxygen were collected from the Polarstern (vessel:polarstern:ctd_sbe9plus_321) and Ocean City (vessel:polarstern:ctd_sbe9plus_935) CTD/Rosette systems during the Multidisciplinary drifting observatory for the study of Arctic Climate (MOSAiC) expedition, 20 September 2019 – 14 October 2020. Dissolved oxygen was analyzed on board RV Polarstern during legs 3, 4, and 5 between 6 March 2020 and 17 September 2020. Seawater was drawn from Niskin bottles into Winkler flasks using silicon tubing, filling from the bottom and allowing seawater to overflow by at least two flask volumes (approximately 120 mL). The samples were directly pickled by the addition of 1 mL each of concentrated manganese chloride (3 M) and alkaline (NaOH 8 M) sodium iodide (4 M) solutions to form manganese oxyhydrodoxide precipitate. Samples were stored in the dark and underwater at room temperature until analysis. Dissolved oxygen was determined using an automatic Winkler titration setup with potentiometric detection (Titrino plus 848, Metrohm, Switzerland). Reagents were prepared according to Langdon (2010). Blanks were determined before each run by addition of reagents to MilliQ water. The titrations were performed directly in the flasks used for sampling after the manganese oxyhydroxide precipitate was dissolved by addition of sulphuric acid (5 M). Sodium thiosulphate (~0.2 N) solutions were prepared onboard for the titration and the concentration was determined before each run using an iodate standard (0.01 N, OSIL, United Kingdom). The analytical precision based on duplicate samples analysis was 0.4 ± 2.6 µmol/kg (n = 60).
    Keywords: Arctic Ocean; Bottle number; CTD/Rosette; CTD-RO; DATE/TIME; DEPTH, water; dissolved oxygen; Event label; LATITUDE; LONGITUDE; Mosaic; MOSAiC; MOSAiC_ECO; MOSAiC20192020; Multidisciplinary drifting Observatory for the Study of Arctic Climate; Oxygen; Polarstern; Potentiometric titrator, Metrohm, 848 Titrino plus; Pressure, water; PS122/3; PS122/3_30-53; PS122/3_31-59; PS122/3_36-59; PS122/3_37-88; PS122/3_38-69; PS122/4; PS122/4_44-184; PS122/4_44-202; PS122/4_44-67; PS122/4_45-3; PS122/4_45-31; PS122/4_46-60; PS122/4_47-108; PS122/4_47-60; PS122/4_48-155; PS122/4_48-62; PS122/4_49-25; PS122/4_50-21; PS122/5; PS122/5_59-149; PS122/5_59-306; PS122/5_60-69; PS122/5_61-161; PS122/5_62-91; Quality flag, oxygen; Quality flag, salinity; Quality flag, water temperature; Salinity; Temperature, water; Uniform resource locator/link to sensor metadata; Winkler oxygen; World Oceans Circulation Experiment (WOCE) quality flags according to Jiang et al. (2022)
    Type: Dataset
    Format: text/tab-separated-values, 1404 data points
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  • 4
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    Aerosol soluble chemical composition for OASIS cruise (SO234/2 & SO235), Indian Ocean, July-August 2014, determined by ion chromatography and inductively coupled plasma - mass spectrometry (2021)
    PANGAEA
    Details
    Publication Date: 2023-12-12
    Description: Size segregated aerosol samples were collected during the OASIS (“Organic very short lived substances and their Air Sea Exchange from the Indian Ocean to the Stratosphere”) cruises (FS Sonne, SO234-2 & SO235) during 8 - 20 July & 23 July – 7 August 2014 in the southern Indian Ocean (~30 E - 75 E, 30 S – 5 N). The samples were collected by Birgit Quack of GEOMAR, Kiel, Germany. The aerosol sampler was situated on the roof of the ship's wheelhouse and was connected to an automatic wind sector controller to prevent contamination of the samples from the ship's stack. Most samples were collected using a Sierra-type cascade impactor to separate the aerosol particles at an aerodynamic diameter cutoff of 1 µm. Collection time for these samples varied between 27.7 and 46.9 hours. For one sample, 6 impactor stages and a backup filter were used to give more detailed information aerosol size distribution. This sample was collected over 91.7 hours. Samples were extracted with ultrapure water and the major ions Na+, NH4+, Mg2+, K+, Ca2+, Cl-, NO3-, SO42-, oxalate, Br- and methanesulfonate were determined by ion chromatography (IC). Total soluble iodine (TSI) was determined by inductively coupled plasma - mass spectrometry (ICP-MS) and iodide (I-) and iodate (IO3-) were determined by IC-ICP-MS. The dataset contains the atmospheric concentrations of all measured soluble major ions (in nmol/m³) and iodine species (in pmol/ m³).
    Keywords: Aerosol size distribution; Air volume; Ammonium, soluble; Ammonium, soluble, standard deviation; Bromide, soluble; Bromide, soluble, standard deviation; Calcium, soluble; Calcium, soluble, standard deviation; Chloride, soluble; Chloride, soluble, standard deviation; Date/Time of event; Date/Time of event 2; Elemental species separation and detection (IC-ICP-MS); Event label; High volume aerosol collector (Graseby-Anderson type); Inductively coupled plasma - mass spectrometry (ICP-MS); Iodate, soluble; Iodate, soluble, standard deviation; Iodide, soluble; Iodide, soluble, standard deviation; Iodine, soluble; Iodine, soluble, standard deviation; iodine speciation; Ion chromatography; Latitude of event; Latitude of event 2; Longitude of event; Longitude of event 2; Magnesium, soluble; Magnesium, soluble, standard deviation; major ions; Methane sulfonic acid; Methane sulfonic acid, standard deviation; Nitrate, soluble; Nitrate, soluble, standard deviation; OASIS; Oxalate, soluble; Oxalate, soluble, standard deviation; Potassium, soluble; Potassium, soluble, standard deviation; Sample code/label; Size fraction; SO234/2; SO234/2_MI01; SO234/2_MI02; SO234/2_MI03; SO234/2_MI04; SO234/2_MI05; SO235; SO235_MI09; SO235_MI10; SO235_MI11; SO235_MI13; SO235_MI14; Sodium, soluble; Sodium, soluble, standard deviation; Sonne; Southern Indian Ocean; SPACES II; Sulfate, soluble; Sulfate, soluble, standard deviation
    Type: Dataset
    Format: text/tab-separated-values, 709 data points
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  • 5
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    Water column Chlorophyll a concentrations during the MOSAiC expedition (PS122) in the Central Arctic Ocean 2019-2020 (2023)
    PANGAEA
    Details
    Publication Date: 2023-12-12
    Description: 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.
    Keywords: 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
    Type: Dataset
    Format: text/tab-separated-values, 2273 data points
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  • 6
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    Dissolved inorganic carbon and total alkalinity of seawater samples from the Weddell Sea for RV POLARSTERN expedition PS117 (2023)
    PANGAEA
    Details
    Publication Date: 2024-01-19
    Description: Discrete seawater samples for the determination of dissolved inorganic carbon (DIC) and total alkalinity (TA) were collected from CTD stations during RV POLARSTERN expedition PS117, between 15 December 2018 and 7 February 2019. Seawater samples were collected from stations that used the AWI-operated CTD, as well as the Ultra-Clean-CTD, operated by NIOZ. DIC and TA were measured using coulometric titration and potentiometric titration, respectively, on a VINDTA 3C system. Nutrients were measured with UV-Vis spectrophotometry and a continuous gas-segmented flow auto-analyser. Data for station 41 have previously been published on Pangaea and are excluded from this dataset (https://doi.org/10.1594/PANGAEA.946363). Bottle data (including nutrients) from the AWI CTD and Ultra-Clean-CTD stations have already been published and are stored on Pangaea under https://doi.org/10.1594/PANGAEA.910673 and https://doi.org/10.1594/PANGAEA.940209, respectively. Data quality flags follow the WOCE quality code definitions for water sample measurements. Details on sample collection and analysis methods for DIC and TA can be found in Droste et al. (2022).
    Keywords: Alkalinity, total; Bottle number; Carbon, inorganic, dissolved; Cast number; Comment; Coulometric titration; CTD/Rosette; CTD/Rosette, ultra clean; CTD-RO; CTD-UC; DATE/TIME; DEPTH, water; Event label; LATITUDE; Lazarev Sea; LONGITUDE; Nitrate; Phosphate; Polarstern; Potentiometric titration; Pressure, water; PS117; PS117_13-2; PS117_14-1; PS117_15-1; PS117_16-1; PS117_18-2; PS117_19-1; PS117_20-1; PS117_21-1; PS117_22-2; PS117_25-1; PS117_26-1; PS117_27-1; PS117_28-1; PS117_30-1; PS117_30-2; PS117_31-1; PS117_33-6; PS117_34-2; PS117_53-4; PS117_54-2; PS117_56-2; PS117_58-1; PS117_61-1; PS117_62-1; PS117_64-4; PS117_66-1; PS117_67-1; PS117_68-2; PS117_69-1; PS117_71-1; PS117_72-3; PS117_74-1; PS117_76-1; PS117_81-2; PS117_83-2; PS117_85-1; PS117_90-1; PS117_92-1; PS117_94-1; Quality flag, alkalinity, total; Quality flag, carbon, inorganic, dissolved; Salinity; Silicate; South Atlantic Ocean; Spectrophotometry; Station label; SUIT; Surface and under ice trawl; Temperature, water; Weddell Sea; World Oceans Circulation Experiment (WOCE) quality flags according to Jiang et al. (2022)
    Type: Dataset
    Format: text/tab-separated-values, 9106 data points
    Location Call Number Expected Availability
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  • 7
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    Dissolved inorganic carbon and total alkalinity of seawater samples during RV POLARSTERN expedition PS122 – MOSAiC (2023)
    PANGAEA
    Details
    Publication Date: 2024-03-01
    Description: Discrete seawater samples for dissolved inorganic carbon (DIC) and total alkalinity (TA) were collected from the Polarstern (https://sensor.awi.de/?site=search&q=vessel:polarstern:ctd_sbe9plus_321) and Ocean City (https://sensor.awi.de/?site=search&q=vessel:polarstern:ctd_sbe9plus_935) CTD/Rosette systems during the Multidisciplinary drifting observatory for the study of Arctic Climate (MOSAiC) expedition, 20 September 2019 – 14 October 2020. Following Dickson et al. (2007), seawater samples were collected between 30 October 2019 and 28 September 2020 in borosilicate (3.3) bottles (250 ml), fixed with saturated mercuric chloride (HgCl₂) solution (100 µl), capped with greased (Apiezon® L) ground glass stoppers secured by insulating tape, and stored dark +4°C until post-cruise analysis at the Institute of Marine Research (IMR, Norway), University of East Anglia (UEA, UK), and Hokkaido University (Japan). DIC was determined by coulometric titration (Johnson et al., 1985) using a Versatile INstrument for the Determination of Total inorganic carbon and titration Alkalinity (VINDTA 3C, Marianda, Germany) at UEA, a VINDTA 3D at IMR, and a custom-built extraction system at Hokkaido University (Ono et al., 1998). TA was determined by potentiometric titration using a VINDTA 3C at UEA, a Versatile Instrument for the Determination of Titration Alkalinity (VINDTA 3S, Marianda, Germany) at IMR, and a TA analyzer ATT-05 (Kimoto Electric Co., Ltd., Japan) at Hokkaido University. The accuracy for both DIC and TA was set at IMR and UEA by routine analysis of certified reference material (CRM batch #182, #191) distributed by A. G. Dickson (Scripps Institution of Oceanography, La Jolla, CA, USA). Reference materials (Batch AR and AU; KANSO Technos Co., Ltd., Osaka, Japan), traceable to the Scripps CO₂ CRM, were used at Hokkaido University. Analytical precision for DIC and TA content is 〈 ±2 μmol/kg and 〈 ±2 μmol/kg, respectively, based on CRM replicates. Based on secondary quality control (Jutterström et al., 2010; Tanhua et al., 2010), DIC and TA were adjusted by -8 µmol/kg and -23 µmol/kg, respectively, for events PS122/1_7-49, PS122/1_8-46, PS122/1_9-50, and PS122/1_10-45. Data quality is indicated by flags following the consolidated WOCE system of Jiang et al. (2022).
    Keywords: Alkalinity, total; Arctic Ocean; Bottle number; Carbon, inorganic, dissolved; Carbonate chemistry; Coulometric titration according to Johnson et al. 1985; measured with total inorganic carbon and titration alkalinity analyzer, Marianda, VINDTA; CTD/Rosette; CTD-RO; DATE/TIME; DEPTH, water; Dissolved inorganic carbon; ELEVATION; Event label; HAVOC; LATITUDE; LONGITUDE; Mosaic; MOSAiC; MOSAiC_ECO; MOSAiC20192020; Multidisciplinary drifting Observatory for the Study of Arctic Climate; Polarstern; Pressure, water; PS122/1; PS122/1_10-44; PS122/1_5-40; 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_21-65; PS122/2_22-47; PS122/2_23-63; PS122/2_25-54; PS122/3; PS122/3_30-41; PS122/3_30-53; PS122/3_31-59; PS122/3_32-75; PS122/3_33-69; PS122/3_34-67; PS122/3_34-77; PS122/3_35-63; PS122/3_35-77; PS122/3_36-59; PS122/3_36-81; PS122/3_37-45; PS122/3_37-88; PS122/3_38-54; PS122/3_38-69; PS122/3_39-51; PS122/3_40-36; PS122/4; PS122/4_44-184; PS122/4_44-67; PS122/4_45-100; PS122/4_45-3; 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_47-108; PS122/4_47-60; PS122/4_48-15; PS122/4_48-62; PS122/4_49-14; PS122/4_49-25; PS122/5; PS122/5_59-149; PS122/5_59-274; PS122/5_59-306; PS122/5_59-357; PS122/5_59-363; PS122/5_59-62; PS122/5_59-72; PS122/5_60-69; PS122/5_60-89; PS122/5_61-161; PS122/5_61-189; PS122/5_61-211; PS122/5_62-38; PS122/5_62-66; PS122/5_62-91; PS122/5_63-111; PS122/5_63-35; PS122/5_63-53; Quality flag, alkalinity, total; Quality flag, carbon, organic, dissolved; Quality flag, salinity; Quality flag, water temperature; Ridges - Safe HAVens for ice-associated Flora and Fauna in a Seasonally ice-covered Arctic OCean; Salinity; Temperature, water; Total alkalinity; Uniform resource locator/link to sensor metadata; World Oceans Circulation Experiment (WOCE) quality flags according to Jiang et al. (2022)
    Type: Dataset
    Format: text/tab-separated-values, 8580 data points
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  • 8
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    Physical oceanography water bottle samples based on Ocean City CTD during POLARSTERN cruise PS122 (2023)
    PANGAEA
    Details
    Publication Date: 2024-04-13
    Description: This data set contains the hydrographic water sample data collected with a CTD rosette in a shelter on the ice (Ocean City) during the Multidisciplinary drifting Observatory for the Study of Arctic Climate (MOSAiC). The CTD is an SBE911plus with 12 bottles, 5 liters each, operated with a small winch and crane in the shelter on the ice. The data set contains calibrated and quality-controlled parameters (temperature, conductivity, oxygen and their derived variables) as well as only pre-cruise calibrated parameters where no post-cruise calibration or quality control was applied (all other). CDOM fluorescence data are the exception. Quality control was performed but data have to be handled with care, as the sensor seems to have broken down during leg 3 such that no post-cruise calibration could be applied. Due to issues during processing SPAR data is missing in the bottle data. The data are provided as text file (all cruise legs in one file) as well as in netCDF format (one file per cruise leg). The accuracy for salinity and conductivity is 0.004 while the accuracy for temperature is 0.002. Additional information on the sensor used for the final data set, the water depth as well as the availability of profile or bottle data is given in a separate info-text-file. Contact: Sandra.Tippenhauer@awi.de Quality flags are given based on paragraph 6. "Quality flags" from https://www.seadatanet.org/content/download/596/file/SeaDataNet_QC_procedures_V2_%28May_2010%29.pdf. QC flag meanings: 0 = unknown, 1 = good_data, 2 = probably good_data, 3 = probably bad data, 4 = bad data set to nan. This work was carried out and data was produced as part of the international Multidisciplinary drifting Observatory for the Study of the Arctic Climate (MOSAiC) with the tag MOSAiC20192020. We thank all persons involved in the expedition of the Research Vessel Polarstern during MOSAiC in 2019-2020 (AWI_PS122_00) as listed in Nixdorf et al. (2021).
    Keywords: Advective Pathways of nutrients and key Ecological substances in the ARctic; APEAR; Arctic Ocean; Attenuation, optical beam transmission; AWI_PhyOce; Bottle number; Chlorophyll a; Conductivity; CTD; CTD, Seabird; CTD, Sea-Bird, SBE 911plus; CTD, Sea-Bird, SBE 911plus, measured with Temperature sensor, Sea-Bird, SBE3plus; CTD, Sea-Bird, SBE 911plus; Calculation according to Bittig et al. (2018); CTD, Sea-Bird, SBE 911plus; Calculation according to McDougall and Barker (2011); CTD, Sea-Bird, SBE 911plus; measured with Conductivity sensor, Sea-Bird, SBE 4; CTD, Sea-Bird, SBE 911plus; measured with Dissolved oxygen sensor, Sea-Bird, SBE 43; CTD, Sea-Bird, SBE 911plus; measured with Fluorometer, Turner Designs, Cyclops-6k 2160-000-R; CTD, Sea-Bird, SBE 911plus; measured with Fluorometer, WET Labs, ECO FLRTD; CTD, Sea-Bird, SBE 911plus; measured with PAR sensor, Biospherical Instruments Inc., QCP2300-HP; CTD/Rosette; CTD-R; CTD-RO; DATE/TIME; Density, potential anomaly; DEPTH, water; Event label; Fluorescence, colored dissolved organic matter; HAVOC; LATITUDE; LONGITUDE; MOSAiC; MOSAIC_PO; MOSAiC20192020; MOSAiC expedition; Multidisciplinary drifting Observatory for the Study of Arctic Climate; Oxygen; Oxygen, dissolved; Oxygen saturation; Physical Oceanography @ AWI; Polarstern; Pressure, water; PS122/1; PS122/1_10-14; PS122/1_10-26; PS122/1_10-45; PS122/1_11-17; PS122/1_11-40; PS122/1_4-37; PS122/1_5-40; PS122/1_5-46; PS122/1_5-59; PS122/1_6-122; PS122/1_6-17; PS122/1_6-38; PS122/1_7-15; PS122/1_7-40; PS122/1_8-16; PS122/1_9-28; PS122/1_9-47; PS122/1_99-78; PS122/1_99-80; PS122/1_99-81; PS122/1_99-82; PS122/2; PS122/2_16-54; PS122/2_16-94; PS122/2_17-18; PS122/2_17-7; PS122/2_17-78; PS122/2_17-8; PS122/2_18-16; PS122/2_18-5; PS122/2_18-81; PS122/2_19-18; PS122/2_19-4; PS122/2_19-89; PS122/2_20-109; PS122/2_20-17; PS122/2_20-2; PS122/2_21-1; PS122/2_21-101; PS122/2_21-114; PS122/2_21-128; PS122/2_21-26; PS122/2_22-18; PS122/2_22-3; PS122/2_22-49; PS122/2_22-71; PS122/2_23-17; PS122/2_23-4; PS122/2_23-70; PS122/2_23-97; PS122/2_24-47; PS122/2_25-26; PS122/2_25-4; PS122/3; PS122/3_29-74; PS122/3_29-8; PS122/3_30-38; PS122/3_30-40; PS122/3_30-41; PS122/3_30-9; PS122/3_31-18; PS122/3_31-19; PS122/3_31-81; PS122/3_32-12; PS122/3_32-38; PS122/3_32-75; PS122/3_32-76; PS122/3_32-77; PS122/3_33-69; PS122/3_33-70; PS122/3_33-71; PS122/3_33-80; PS122/3_33-82; PS122/3_34-17; PS122/3_34-64; PS122/3_34-65; PS122/3_34-66; PS122/3_34-67; PS122/3_34-76; PS122/3_34-77; PS122/3_35-25; PS122/3_35-60; PS122/3_35-61; PS122/3_35-62; PS122/3_35-63; PS122/3_35-77; PS122/3_35-92; PS122/3_36-115; PS122/3_36-17; PS122/3_36-18; PS122/3_36-19; PS122/3_36-59; PS122/3_36-81; PS122/3_36-83; PS122/3_36-84; PS122/3_36-85; PS122/3_37-116; PS122/3_37-14; PS122/3_37-15; PS122/3_37-45; PS122/3_37-46; PS122/3_37-47; PS122/3_37-88; PS122/3_37-99; PS122/3_38-100; PS122/3_38-31; PS122/3_38-5; PS122/3_38-54; PS122/3_38-55; PS122/3_38-56; PS122/3_38-69; PS122/3_39-16; PS122/3_39-51; PS122/3_39-52; PS122/3_39-53; PS122/3_39-54; PS122/3_39-69; PS122/3_39-70; PS122/3_39-82; PS122/3_99-86; Quality flag, attenuation; Quality flag, chlorophyll; Quality flag, conductivity; Quality flag, conservative water temperature; Quality flag, density; Quality flag, fluorescence, colored dissolved organic matter; Quality flag, irradiance; Quality flag, oxygen; Quality flag, rhodamine; Quality flag, salinity; Quality flag, water temperature; Radiation, photosynthetically active; Rhodamine; Ridges - Safe HAVens for ice-associated Flora and Fauna in a Seasonally ice-covered Arctic OCean; Salinity; Salinity, absolute; Seadatanet flag: Data quality control procedures according to SeaDataNet (2010); Temperature, water; Temperature, water, conservative; Temperature, water, potential; WAOW; Why is the deep Arctic Ocean Warming?
    Type: Dataset
    Format: text/tab-separated-values, 34836 data points
    Location Call Number Expected Availability
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  • 9
    facet.materialart.
    Unknown
    Dissolved nutrients data from the PS122 MOSAiC Expedition carried out onboard Polarstern during Legs 1 to 3 (2024)
    PANGAEA
    Details
    Publication Date: 2024-04-13
    Description: Samples for the analysis of dissolved nutrients were collected during the Multidisciplinary drifting Observatory for the Study of Arctic Climate (MOSAiC) from the water column, sea ice cores and from special events/locations (e.g., leads, melt ponds, brine, incubation experiments). Samples for dissolved inorganic nutrients (NO3 +NO2 , NO2 , PO4 , Si(OH)4, NH4 ) were analysed onboard during PS122 legs 1 to 3, with duplicate samples collected from CTD casts for later analysis of total dissolved nitrogen (TDN) and total dissolved phosphorus (TDP). From leg 4, all samples collected were stored frozen at -20°C for later analysis. Analyses of stored samples were carried out at the AWI Nutrient Facility between January and March 2021. Nutrient analyses onboard and on land were carried out using a Seal Analytical AA3 continuous flow autoanalyser, controlled by the AACE software version 7.09. Best practice procedures for the measurement of nutrients were adopted following GO-SHIP recommendations (Hydes et al., 2010; Becker et al., 2019). Descriptions of sample collection and handling can be found in the various cruise reports (Haas & Rabe, 2023; Kanzow & Damm, 2023; Rex & Metfies, 2023; Rex & Nicolaus, 2023; Rex & Shupe, 2023). Here we provide data from the water column, obtained from the analysis of discrete samples collected from CTD-Rosette casts from Polarstern (https://sensor.awi.de/?site=search&q=vessel:polarstern:ctd_sbe9plus_321) and Ocean City (https://sensor.awi.de/?site=search&q=vessel:polarstern:ctd_sbe9plus_935). Data from sea ice cores and special events are presented elsewhere. Data from sea ice cores and special events are presented elsewhere. For reference, here we included data from CTD-BTL files associated with nutrient samples. These data are presented by Tippenhauer et al. (2023) Polarstern CTD and Tippenhauer et al. (2023) Ocean City CTD.
    Keywords: Ammonium; Ammonium, standard deviation; Arctic Ocean; Arctic Ocean Nutrient Data; Bottle number; CTD/Rosette; CTD-RO; DATE/TIME; DEPTH, water; ELEVATION; Event label; Gear; LATITUDE; LONGITUDE; MOSAiC; MOSAiC_ECO; MOSAiC20192020; MOSAiC Nutrient Data; Multidisciplinary drifting Observatory for the Study of Arctic Climate; Nitrate and Nitrite; Nitrate and Nitrite, standard deviation; Nitrite; Nitrite, standard deviation; Phosphate; Phosphate, standard deviation; Polarstern; Pressure, water; PS122/1; PS122/1_10-44; PS122/1_6-58; PS122/1_7-49; PS122/1_8-46; PS122/1_9-50; PS122/2; PS122/2_16-21; PS122/2_16-54; PS122/2_16-94; PS122/2_17-41; PS122/2_17-78; PS122/2_17-8; PS122/2_18-16; PS122/2_18-34; PS122/2_18-5; PS122/2_18-81; PS122/2_19-4; PS122/2_19-56; PS122/2_19-89; PS122/2_20-109; PS122/2_20-17; PS122/2_20-2; PS122/2_20-46; PS122/2_21-1; PS122/2_21-101; PS122/2_21-114; PS122/2_21-128; PS122/2_21-26; PS122/2_21-65; PS122/2_22-18; PS122/2_22-3; PS122/2_22-47; PS122/2_22-71; PS122/2_23-17; PS122/2_23-4; PS122/2_23-63; PS122/2_23-70; PS122/2_23-97; PS122/2_24-47; PS122/2_25-26; PS122/2_25-4; PS122/2_25-54; PS122/3; PS122/3_30-53; PS122/3_31-18; PS122/3_31-39; PS122/3_31-59; PS122/3_31-81; PS122/3_32-75; PS122/3_32-77; PS122/3_33-69; PS122/3_33-80; PS122/3_33-82; PS122/3_34-17; PS122/3_34-67; PS122/3_35-63; PS122/3_35-77; PS122/3_36-19; PS122/3_36-59; PS122/3_36-81; PS122/3_37-116; PS122/3_37-45; PS122/3_37-88; PS122/3_38-100; PS122/3_38-31; PS122/3_38-54; PS122/3_38-69; PS122/3_39-16; PS122/3_39-51; Quality flag, ammonium; Quality flag, nitrate and nitrite; Quality flag, nitrite; Quality flag, phosphate; Quality flag, salinity; Quality flag, silicon; Quality flag, water temperature; Salinity; Seawater Nutrients; Silicon; Silicon, standard deviation; Temperature, water; Water Column Nutrient Data
    Type: Dataset
    Format: text/tab-separated-values, 25249 data points
    Location Call Number Expected Availability
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  • 10
    facet.materialart.
    Unknown
    Dissolved nutrients data from the PS122 MOSAiC Expedition carried out at the AWI Nutrient Facility (2024)
    PANGAEA
    Details
    Publication Date: 2024-04-13
    Description: Samples for the analysis of dissolved nutrients were collected during the Multidisciplinary drifting Observatory for the Study of Arctic Climate (MOSAiC) from the water column, sea ice cores and from special events/locations (e.g., leads, melt ponds, brine, incubation experiments). Samples for dissolved inorganic nutrients (NO3 +NO2 , NO2 , PO4 , Si(OH)4, NH4 ) were analysed onboard during PS122 legs 1 to 3, with duplicate samples collected from CTD casts for later analysis of total dissolved nitrogen (TDN) and total dissolved phosphorus (TDP). From leg 4, all samples collected were stored frozen at -20°C for later analysis. Analyses of stored samples were carried out at the AWI Nutrient Facility between January and March 2021. Nutrient analyses onboard and on land were carried out using a Seal Analytical AA3 continuous flow autoanalyser, controlled by the AACE software version 7.09. Best practice procedures for the measurement of nutrients were adopted following GO-SHIP recommendations (Hydes et al., 2010; Becker et al., 2019). Descriptions of sample collection and handling can be found in the various cruise reports (Haas & Rabe, 2023; Kanzow & Damm, 2023; Rex & Metfies, 2023; Rex & Nicolaus, 2023; Rex & Shupe, 2023). Here we provide data from the water column, obtained from the analysis of discrete samples collected from CTD-Rosette casts from Polarstern (https://sensor.awi.de/?site=search&q=vessel:polarstern:ctd_sbe9plus_321) and Ocean City (https://sensor.awi.de/?site=search&q=vessel:polarstern:ctd_sbe9plus_935). Data from sea ice cores and special events are presented elsewhere. Data from sea ice cores and special events are presented elsewhere. For reference, here we included data from CTD-BTL files associated with nutrient samples. These data are presented by Tippenhauer et al. (2023) Polarstern CTD and Tippenhauer et al. (2023) Ocean City CTD.
    Keywords: Ammonium; Ammonium, standard deviation; Arctic Ocean; Arctic Ocean Nutrient Data; Bottle number; CTD/Rosette; CTD-RO; DATE/TIME; DEPTH, water; ELEVATION; Event label; Gear; LATITUDE; LONGITUDE; MOSAiC; MOSAiC_ECO; MOSAiC20192020; MOSAiC Nutrient Data; Multidisciplinary drifting Observatory for the Study of Arctic Climate; Nitrate and Nitrite; Nitrate and Nitrite, standard deviation; Nitrite; Nitrite, standard deviation; Nitrogen, total dissolved; Nitrogen, total dissolved, standard deviation; Phosphate; Phosphate, standard deviation; Phosphorus, total dissolved; Phosphorus, total dissolved, standard deviation; Polarstern; Pressure, water; PS122/2; PS122/2_23-63; PS122/3; PS122/3_29-8; PS122/3_30-9; PS122/3_35-92; PS122/3_36-115; PS122/3_37-15; PS122/3_39-82; PS122/3_40-36; PS122/3_42-32; PS122/4; PS122/4_44-184; PS122/4_44-67; PS122/4_45-100; PS122/4_45-3; PS122/4_45-31; PS122/4_45-75; PS122/4_45-79; PS122/4_45-82; PS122/4_45-85; PS122/4_45-9; PS122/4_45-96; PS122/4_46-2; PS122/4_46-35; PS122/4_46-60; PS122/4_46-83; PS122/4_46-87; PS122/4_46-91; PS122/4_47-108; PS122/4_47-60; PS122/4_48-15; PS122/4_48-155; PS122/4_48-62; PS122/4_48-96; PS122/4_49-14; PS122/4_49-2; PS122/4_49-25; PS122/4_50-21; PS122/5; PS122/5_59-149; PS122/5_59-274; PS122/5_59-306; PS122/5_59-357; PS122/5_59-363; PS122/5_59-62; PS122/5_59-72; PS122/5_60-69; PS122/5_60-89; PS122/5_61-161; PS122/5_61-189; PS122/5_61-211; PS122/5_62-38; PS122/5_62-66; PS122/5_62-91; PS122/5_63-111; PS122/5_63-35; PS122/5_63-53; Quality flag, ammonium; Quality flag, nitrate and nitrite; Quality flag, nitrite; Quality flag, nitrogen, total dissolved; Quality flag, phosphate; Quality flag, phosphorus, total dissolved; Quality flag, salinity; Quality flag, silicon; Quality flag, water temperature; Salinity; Seawater Nutrients; Silicon; Silicon, standard deviation; Temperature, water; Water Column Nutrient Data
    Type: Dataset
    Format: text/tab-separated-values, 31223 data points
    Location Call Number Expected Availability
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