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  • 1
    Series available for loan
    Series available for loan
    Biogeochemical data of the 51st Japanese Antarctic Research Expedition in the austral summer of 2009 - 2010 (2011)
    Tokyo : Inst.
    Associated volumes
    Details Availability
    Call number: ZSP-403-318
    In: Jare Data Reports
    Description / Table of Contents: This report presents biogeochemical data obtained by the 51st Japanese Antarctic Research Expedition in the austral summer of 2009 - 2010. The data include measurements of the temperature, salinity, and inorganic nutrient concentrations of seawater shallower than 500 m in the Southern Ocean.
    Type of Medium: Series available for loan
    Pages: 13 S. : Ill.
    Series Statement: Jare Data Reports 318 : Marine Biology 41
    URL: http://id.nii.ac.jp/1291/00003368/
    Location: AWI Reading room
    Branch Library: AWI Library
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  • 2
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    (Table 3) Number and mean caliper diameter of ikaite crystals sampled during R/V Lance cruise in April-May 2011 (2015)
    PANGAEA
    Details
    Publication Date: 2023-03-02
    Keywords: Arctic Ocean; Crystal size; Date/Time of event; Event label; ICEM; Ice measurement; LA11-ICE; LA11-ICE_20; LA11-ICE_21; LA11-ICE_22; LA11-ICE_27b; Lance; Latitude of event; Longitude of event; Maximum caliper diameter (dmax); Number; Sample ID; Sample position; Sample type; Standard deviation
    Type: Dataset
    Format: text/tab-separated-values, 49 data points
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  • 3
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    (Table 1) Air temperature, snow and slush depths and sea ice thickness during R/V Lance cruise in April-May 2011
    PANGAEA
    Details
    Publication Date: 2023-05-12
    Keywords: Arctic Ocean; Date/Time of event; Event label; ICEM; Ice measurement; LA11-ICE; LA11-ICE_1; LA11-ICE_11; LA11-ICE_20; LA11-ICE_21; LA11-ICE_22; LA11-ICE_25; LA11-ICE_27a; LA11-ICE_27b; Lance; Latitude of event; Longitude of event; Sea ice thickness; Snow thickness; Snow type; Temperature, air
    Type: Dataset
    Format: text/tab-separated-values, 32 data points
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  • 4
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    (Table 2) Temperature and salinity of sampled snow, sea ice and slush/brine during R/V Lance cruise in April-May 2011
    PANGAEA
    Details
    Publication Date: 2023-05-12
    Keywords: Arctic Ocean; Date/Time of event; Event label; ICEM; Ice measurement; LA11-ICE; LA11-ICE_1; LA11-ICE_11; LA11-ICE_20; LA11-ICE_21; LA11-ICE_22; LA11-ICE_25; LA11-ICE_27a; LA11-ICE_27b; Lance; Latitude of event; Longitude of event; Salinity, brine; Salinity, maximum; Salinity, minimum; Sea ice salinity; Snow salinity; Temperature, ice/snow; Temperature, ice/snow, maximum; Temperature, ice/snow, minimum
    Type: Dataset
    Format: text/tab-separated-values, 107 data points
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  • 5
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    Temperature, salinity and ikaite crystal characteristics in snow, slush and sea ice during R/V Lance cruise in April-May 2011 (2011)
    PANGAEA
    In:  Supplement to: Nomura, Daiki; Assmy, Philipp; Nehrke, Gernot; Granskog, Mats A; Fischer, Michael; Dieckmann, Gerhard S; Fransson, Agneta; Hu, Yubin; Schnetger, Bernhard (2013): Characterization of ikaite (CaCO3 6H2O) crystals in first-year Arctic sea ice north of Svalbard. Annals of Glaciology, 54(62), 125-131, https://doi.org/10.3189/2013AoG62A034
    Details
    Publication Date: 2023-10-28
    Description: We identified ikaite crystals (CaCO3 · 6H2O) and examined their shape and size distribution in first-year Arctic pack ice, overlying snow and slush layers during the spring melt onset north of Svalbard. Additional measurements of total alkalinity (TA) were made for melted snow and sea-ice samples. Ikaite crystals were mainly found in the bottom of the snowpack, in slush and the surface layers of the sea ice where the temperature was generally lower and salinity higher than in the ice below. Image analysis showed that ikaite crystals were characterized by a roughly elliptical shape and a maximum caliper diameter of 201.0±115.9 µm (n = 918). Since the ice-melting season had already started, ikaite crystals may already have begun to dissolve, which might explain the lack of a relationship between ikaite crystal size and sea-ice parameters (temperature, salinity, and thickness of snow and ice). Comparisons of salinity and TA profiles for melted ice samples suggest that the precipitation/dissolution of ikaite crystals occurred at the top of the sea ice and the bottom of the snowpack during ice formation/melting processes.
    Keywords: Priority Programme 1158 Antarctic Research with Comparable Investigations in Arctic Sea Ice Areas; SPP1158
    Type: Dataset
    Format: application/zip, 3 datasets
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  • 6
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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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  • 7
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    Profiles of temperature, salinity, and density measured by a handheld CTD in melt ponds during expedition PS122/5 (MOSAiC Leg 5) to the central Arctic in August-September 2020 (2024)
    PANGAEA
    Details
    Publication Date: 2024-03-25
    Description: Water temperature, salinity and density were obtained in melt ponds within the MOSAiC Leg 5 ice camp between 23 August and 14 September 2020. A Rinko handheld CTD (JFE Advantech Co., Ltd., Japan) was carefully lowered into the melt ponds on a regular basis to determine the spatial distribution and temporal evolution of the stratification. A fresh meltwater layer was detected within the melt ponds. As part of a dedicated study, the present dataset documents the evolution of this layer.
    Keywords: Arctic Ocean; Calculated from temperature and conductivity; CTD profiler, JFE Advantech, RINKO-Profiler; DATE/TIME; Density, mass density; DEPTH, water; Event label; freshwater layer; LATITUDE; LONGITUDE; melt pond; MOSAiC; MOSAiC20192020; Multidisciplinary drifting Observatory for the Study of Arctic Climate; Polarstern; PS122/5; PS122/5_59-226; PS122/5_59-259; PS122/5_60-147; PS122/5_60-148; PS122/5_62-34; PS122/5_99-16; PS122/5_99-2; PS122/5_99-20; PS122/5_99-24; PS122/5_99-28; PS122/5_99-30; PS122/5_99-33; PS122/5_99-35; PS122/5_99-4; PS122/5_99-6; Salinity; Sea ice; Site; Temperature, water
    Type: Dataset
    Format: text/tab-separated-values, 31020 data points
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  • 8
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    Water and ice temperatures measured by thermistor probe in a melt pond during expedition PS122/5 (MOSAiC Leg 5) to the central Arctic in August-September 2020 (2024)
    PANGAEA
    Details
    Publication Date: 2024-03-25
    Description: The temperatures at water depths of 0.015, 0.05, 0.1, and 0.2 m were measured by thermistor probe (TR-5120, T&D Corp., Nagano, Japan) and temperature data were stored in a data logger (TR-52i, T&D Corp.) at St. 1 melt pond during expedition PS122/5 (MOSAiC Leg 5) to the central Arctic in August-September 2020. In order to install the thermistor probe, we used stick longer than the diameter of the pond.
    Keywords: Arctic Ocean; DATE/TIME; DEPTH, water; Event label; Gear; LATITUDE; LONGITUDE; long term temperature measurement; melt pond; MOSAiC; MOSAiC20192020; Multidisciplinary drifting Observatory for the Study of Arctic Climate; Polarstern; pond ice; PS122/5; PS122/5_58-41; PS122/5_58-42; PS122/5_58-43; PS122/5_58-44; Temperature, water; Temperature recorder; TEMP-R; Thermistor probe, T&D Corp., TR-5120
    Type: Dataset
    Format: text/tab-separated-values, 46080 data points
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  • 9
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    Seawater carbonate chemistry and maximum quantum yield and relative electron transfer rate of microalgal communities in Antarctic pack ice (2016)
    PANGAEA
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    Publication Date: 2024-03-15
    Description: Increased anthropogenic CO2 emissions are causing changes to oceanic pH and CO2 concentrations that will impact many marine organisms, including microalgae. Phytoplankton taxa have shown mixed responses to these changes with some doing well while others have been adversely affected. Here, the photosynthetic response of sea-ice algal communities from Antarctic pack ice (brine and infiltration microbial communities) to a range of CO2 concentrations (400 ppm to 11,000 ppm in brine algae experiments, 400 ppm to 20,000 ppm in the infiltration ice algae experiment) was investigated. Incubations were conducted as part of the Sea-Ice Physics and Ecosystem Experiment II (SIPEX-2) voyage, in the austral spring (September–November), 2012. In the brine incubations, maximum quantum yield (Fv/Fm) and relative electron transfer rate (rETRmax) were highest at ambient and 0.049% (experiment 1) and 0.19% (experiment 2) CO2 concentrations, although, Fv/Fm was consistently between 0.53±0.10–0.68±0.01 across all treatments in both experiments. Highest rETRmax was exhibited by brine cultures exposed to ambient CO2 concentrations (60.15). In a third experiment infiltration ice algal communities were allowed to melt into seawater modified to simulate the changed pH and CO2 concentrations of future springtime ice-edge conditions. Ambient and 0.1% CO2 treatments had the highest growth rates and Fv/Fm values but only the highest CO2 concentration produced a significantly lower rETRmax. These experiments, conducted on natural Antarctic sea-ice algal communities, indicate a strong level of tolerance to elevated CO2 concentrations and suggest that these communities might not be adversely affected by predicted changes in CO2 concentration over the next century.
    Keywords: Alkalinity, total; Antarctic; Aragonite saturation state; Bicarbonate ion; Bottles or small containers/Aquaria (〈20 L); Calcite saturation state; Calculated using seacarb after Nisumaa et al. (2010); Carbon, inorganic, dissolved; Carbonate ion; Carbonate system computation flag; Carbon dioxide; Chlorophyll a; Comment; Entire community; Event label; EXP; Experiment; Fugacity of carbon dioxide (water) at sea surface temperature (wet air); Incubation duration; Laboratory experiment; Light saturation; Maximal electron transport rate, relative; Maximum quantum yield of photosystem II; OA-ICC; Ocean Acidification International Coordination Centre; Open ocean; Partial pressure of carbon dioxide (water) at sea surface temperature (wet air); Pelagos; pH; Photosynthetic quantum efficiency; Polar; Primary production/Photosynthesis; Salinity; SIPEX-2_station__4; SIPEX-2_station__7; SIPEX-2_station__8; Station label; Temperature, water; Treatment; Type
    Type: Dataset
    Format: text/tab-separated-values, 3631 data points
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  • 10
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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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