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  • PANGAEA  (8)
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  • 1
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    Unknown
    Physical oceanography measured on water bottle samples during POLARSTERN cruise PS117 (2020)
    PANGAEA
    In:  Alfred Wegener Institute, Helmholtz Centre for Polar and Marine Research, Bremerhaven
    Details
    Publication Date: 2023-10-19
    Keywords: AWI_PhyOce; Bottle number; Conductivity; CTD/Rosette; CTD-RO; Date/Time of event; Density, sigma-theta (0); DEPTH, water; Elevation of event; Event label; Latitude of event; Lazarev Sea; Longitude of event; Nitrate; Nitrite; Oxygen; Oxygen saturation; Oxygen sensor, SBE 43; Phosphate; Physical Oceanography @ AWI; Polarstern; Pressure, water; PS117; PS117_1-1; PS117_13-2; PS117_14-1; PS117_15-1; PS117_18-2; PS117_19-1; PS117_19-4; PS117_2-1; PS117_21-1; PS117_22-2; PS117_26-1; PS117_28-1; PS117_29-1; PS117_30-1; PS117_31-1; PS117_33-6; PS117_34-2; PS117_35-6; PS117_4-1; PS117_41-1; PS117_41-12; PS117_41-6; PS117_41-9; PS117_5-1; PS117_53-4; PS117_54-2; PS117_56-2; PS117_58-1; PS117_62-1; PS117_6-3; PS117_63-1; PS117_64-4; PS117_66-1; PS117_68-2; PS117_69-1; PS117_7-1; PS117_71-1; PS117_72-3; PS117_74-1; PS117_76-1; PS117_81-2; PS117_83-2; PS117_90-1; PS117_92-1; PS117_94-1; PS117_99-3; Salinity; Scotia Sea; Silicate; South Atlantic Ocean; SUIT; Surface and under ice trawl; Temperature, water; Temperature, water, potential; Titration; Weddell Sea
    Type: Dataset
    Format: text/tab-separated-values, 12673 data points
    Location Call Number Expected Availability
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    DATA PANGAEA
  • 2
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    Unknown
    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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    DATA PANGAEA
  • 3
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    Unknown
    Chlorophyll a, primary production and nutrients during POLARSTERN cruise ANT-XXVIII/2 (2017)
    PANGAEA
    In:  Supplement to: Hoppe, Clara Jule Marie; Klaas, Christine; Ossebaar, Sharyn; Soppa, Mariana A; Cheah, Wee; Laglera, Luis Miguel; Santos-Echeandía, Juan; Rost, Björn; Wolf-Gladrow, Dieter A; Bracher, Astrid; Hoppema, Mario; Strass, Volker H; Trimborn, Scarlett (2017): Controls of primary production in two phytoplankton blooms in the Antarctic Circumpolar Current. Deep Sea Research Part II: Topical Studies in Oceanography, 138, 63-73, https://doi.org/10.1016/j.dsr2.2015.10.005
    Details
    Publication Date: 2023-10-18
    Description: The Antarctic Circumpolar Current has a high potential for primary production and carbon sequestration through the biological pump. In the current study, two large-scale blooms observed in 2012 during a cruise with R.V. Polarstern were investigated with respect to phytoplankton standing stocks, primary productivity and nutrient budgets. While net primary productivity was similar in both blooms, chlorophyll a -specific photosynthesis was more efficient in the bloom closer to the island of South Georgia (39 °W, 50 °S) compared to the open ocean bloom further east (12 °W, 51 °S). We did not find evidence for light being the driver of bloom dynamics as chlorophyll standing stocks up to 165 mg/m² developed despite mixed layers as deep as 90 m. Since the two bloom regions differ in their distance to shelf areas, potential sources of iron vary. Nutrient (nitrate, phosphate, silicate) deficits were similar in both areas despite different bloom ages, but their ratios indicated more pronounced iron limitation at 12 °W compared to 39 °W. While primarily the supply of iron and not the availability of light seemed to control onset and duration of the blooms, higher grazing pressure could have exerted a stronger control toward the declining phase of the blooms.
    Type: Dataset
    Format: application/zip, 3 datasets
    Location Call Number Expected Availability
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    DATA PANGAEA
  • 4
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    Phytoplankton composition derived from CHEMTAX along 10°E during POLARSTERN cruise ANT-XXVIII/3, Jan-March 2012 (2016)
    PANGAEA
    In:  Supplement to: Cheah, Wee; Soppa, Mariana A; Wiegmann, Sonja; Ossebaar, Sharyn; Laglera, Luis Miguel; Strass, Volker H; Santos-Echeandía, Juan; Hoppema, Mario; Wolf-Gladrow, Dieter A; Bracher, Astrid (2016): Importance of deep mixing and silicic acid in regulating phytoplankton biomass and community in the iron-limited Antarctic Polar Front region in summer. Deep Sea Research Part II: Topical Studies in Oceanography, 12 pp, https://doi.org/10.1016/j.dsr2.2016.05.019
    Details
    Publication Date: 2023-10-18
    Description: Phytoplankton community structure and their physiological response in the vicinity of the Antarctic Polar Front (APF; 44°S to 53°S, centred at 10°E) were investigated as part of the ANT-XXVIII/3 Eddy-Pump cruise conducted in austral summer 2012. Our results show that under iron-limited (〈 0.3 µmol/m**3) conditions, high total chlorophyll-a (TChl-a) concentrations (〉 0.6 mg/m**3) can be observed at stations with deep mixed layer (〉 60 m) across the APF. In contrast, light was excessive at stations with shallower mixed layer and phytoplankton were producing higher amounts of photoprotective pigments, diadinoxanthin (DD) and diatoxanthin (DT), at the expense of TChl-a, resulting in higher ratios of (DD+DT)/ TChl-a. North of the APF, significantly lower silicic acid (Si(OH)4) concentrations (〈 2 mmol/m**3) lead to the domination of nanophytoplankton consisting mostly of haptophytes, which produced higher ratios of (DD+DT)/TChl-a under relatively low irradiance conditions. The Si(OH)4 replete (〉 5 mmol/m**3) region south of the APF, on the contrary, was dominated by microphytoplankton (diatoms and dinoflagellates) with lower ratios of (DD+DT)/TChl-a, despite having been exposed to higher levels of irradiance. The significant correlation between nanophytoplankton and (DD+DT)/TChl-a indicates that differences in taxon-specific response to light are also influencing TChl-a concentration in the APF during summer. Our results reveal that provided mixing is deep and Si(OH)4 is replete, TChl-a concentrations higher than 0.6 mg/m**3 are achievable in the iron-limited APF waters during summer.
    Keywords: ANT-XXVIII/3; CHEMTAX (Lewitus et al., 2005); Chlorophytes; Cryptophytes; CTD/Rosette; CTD-RO; Cyanobacteria; Date/Time of event; DEPTH, water; Diatoms; Dinoflagellates; Elevation of event; Event label; Haptophytes; In situ pump; ISP; Latitude of event; Longitude of event; Polarstern; Prasinophytes; PS79; PS79/057-4; PS79/060-5; PS79/061-1; PS79/062-1; PS79/063-2; PS79/064-1; PS79/065-1; PS79/066-1; PS79/068-1; PS79/069-4; PS79/070-3; PS79/073-2; PS79/074-1; PS79/075-9; PS79/076-2; PS79/077-1; PS79/078-1; PS79/079-1; PS79/080-1; PS79/081-11; PS79/081-5; PS79/082-1; PS79/083-1; PS79/084-9; South Atlantic Ocean
    Type: Dataset
    Format: text/tab-separated-values, 1090 data points
    Location Call Number Expected Availability
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    DATA PANGAEA
  • 5
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    Nutrient concentrations during POLARSTERN cruise ANT-XXVIII/2 (2017)
    PANGAEA
    Details
    Publication Date: 2023-10-18
    Keywords: ANT-XXVIII/3; Area/locality; CTD/Rosette; CTD-RO; Date/Time of event; DEPTH, water; Elevation of event; Event label; Latitude of event; Longitude of event; Nitrate; Phosphate; Polarstern; PS79; PS79/087-2; PS79/088-1; PS79/092-1; PS79/093-1; PS79/095-3; PS79/096-1; PS79/101-1; PS79/102-1; PS79/103-1; PS79/104-1; PS79/105-1; PS79/106-1; PS79/107-1; PS79/108-1; PS79/109-1; PS79/110-1; PS79/111-1; PS79/112-1; PS79/114-2; PS79/115-1; PS79/116-1; PS79/117-1; PS79/118-1; PS79/119-3; PS79/120-1; PS79/121-1; PS79/122-2; PS79/123-1; PS79/124-1; PS79/125-1; PS79/126-1; PS79/127-2; PS79/128-10; PS79/137-7; PS79/144-2; PS79/145-1; PS79/146-1; PS79/147-1; PS79/148-1; PS79/149-1; PS79/150-1; PS79/151-1; PS79/152-1; PS79/153-1; PS79/154-1; PS79/155-1; PS79/156-1; PS79/157-1; PS79/158-1; PS79/159-1; PS79/160-1; PS79/161-1; PS79/162-2; PS79/163-1; PS79/164-1; Silicate; South Atlantic Ocean
    Type: Dataset
    Format: text/tab-separated-values, 2589 data points
    Location Call Number Expected Availability
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    DATA PANGAEA
  • 6
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    Averaged nutrient concentrations during POLARSTERN cruise ANT-XXVIII/2 (2017)
    PANGAEA
    Details
    Publication Date: 2023-10-18
    Keywords: ANT-XXVIII/3; Area/locality; CTD/Rosette; CTD-RO; Date/Time of event; DEPTH, water; Elevation of event; Event label; Latitude of event; Longitude of event; Nitrate; Nitrate/Phosphate deficit ratio; Nitrate deficit, integrated; Phosphate; Phosphate deficit, integrated; Polarstern; PS79; PS79/085-3; PS79/086-2; PS79/087-2; PS79/088-1; PS79/092-1; PS79/093-1; PS79/095-3; PS79/096-1; PS79/101-1; PS79/102-1; PS79/103-1; PS79/104-1; PS79/105-1; PS79/106-1; PS79/107-1; PS79/108-1; PS79/109-1; PS79/110-1; PS79/111-1; PS79/112-1; PS79/114-2; PS79/115-1; PS79/116-1; PS79/117-1; PS79/118-1; PS79/119-3; PS79/120-1; PS79/121-1; PS79/122-2; PS79/123-1; PS79/124-1; PS79/125-1; PS79/126-1; PS79/127-2; PS79/128-10; PS79/137-7; PS79/144-2; PS79/145-1; PS79/146-1; PS79/147-1; PS79/148-1; PS79/149-1; PS79/150-1; PS79/151-1; PS79/152-1; PS79/153-1; PS79/154-1; PS79/155-1; PS79/156-1; PS79/157-1; PS79/158-1; PS79/159-1; PS79/160-1; PS79/161-1; PS79/162-2; PS79/163-1; PS79/164-1; PS79/165-5; PS79/166-1; PS79/167-1; PS79/168-1; PS79/169-1; PS79/170-1; PS79/171-1; PS79/172-1; PS79/173-1; Silicate; Silicate/Nitrate deficite ratio; Silicate deficit, integrated; South Atlantic Ocean
    Type: Dataset
    Format: text/tab-separated-values, 580 data points
    Location Call Number Expected Availability
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    DATA PANGAEA
  • 7
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    Chlorophyll a and primary production during POLARSTERN cruise ANT-XXVIII/2 (2017)
    PANGAEA
    Details
    Publication Date: 2023-10-18
    Keywords: ANT-XXVIII/3; Area/locality; Chlorophyll a, areal concentration; CTD/Rosette; CTD-RO; Date/Time of event; DEPTH, water; Elevation of event; Event label; Latitude of event; Longitude of event; Mixed layer depth; Photosynthetic efficiency normalized to chlorophyll a biomass; Polarstern; Primary production, integrated; PS79; PS79/085-3; PS79/086-2; PS79/091-5; PS79/114-2; PS79/128-10; PS79/136-8; PS79/137-7; PS79/138-2; PS79/139-3; PS79/140-12; PS79/147-1; PS79/149-1; PS79/155-1; PS79/160-1; PS79/165-5; PS79/168-1; PS79/169-1; PS79/170-1; PS79/174-9; PS79/175-1; Radiation, photosynthetically active per day; South Atlantic Ocean
    Type: Dataset
    Format: text/tab-separated-values, 116 data points
    Location Call Number Expected Availability
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    DATA PANGAEA
  • 8
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    Unknown
    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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    DATA PANGAEA
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