cometadata/datacite-titles-descriptions-related-identifiers huggingface dataset:
DOI: 10.1594/pangaea.893269
title: Total oxygen fluxes of four sediment cores from Creek (Potter Cove, Antarctica) exposed to increasing light intensities measured in December 2016

description: Four sediment cores (50 cm length, 10 cm diameter) were collected from the Creek station (located in Potter Cove) by SCUBA divers in December 2016. The sediment cores were stored in a water bath at in situ temperature of 0.5°C. A magnetic stirrer was inserted into the core and the overlying water was permanently aerated. Thereby, the overlying water was kept homogeneous and oxygen saturated. Cold-light lamps (Osram Lumilux Cool Daylight L36W/865, Osram, Munich, Germany) were installed above the sediment cores and the emitted photosynthetically active radiation (PAR) was permanently controlled with a spherical PAR-sensor (US-SQS/L and ULM-500, Walz, Germany). The spherical PAR-sensor was placed in the water bath, adjusted to the lowest height of the sediment surface of the sediment cores, covered with sea-water and treated similar to the sediment cores.Sediment cores were exposed to PAR intensities of 0, 5, 10, 15, 20, 25, 47 and 70 µmol photons/m² s, starting with the lowest PAR. In order to enable the benthic microalgae community (microphytobenthos, MPB) to adjust to the experimental light conditions, the sediment cores were pre-incubated at each PAR intensity for 4 h. The sediment cores were closed airtight with no air bubbles in the overlying water and the volume of the overlying water was determined afterward. An optical oxygen microsensor (OXR50, Pyroscience, Aachen, Germany) with a tip size diameter of 50 µm was installed in the lid, which allowed a continuous measurement of the oxygen concentration in the overlying water. On beforehand, the microsensor was calibrated at in situ temperature with a two-point calibration using air saturated and anoxic waters (by adding sodium dithionite).The sediment cores were incubated at each PAR for ≥3 h. Measurements of oxygen concentrations were performed at a 2 s temporal resolution, while the overlying water was kept homogeneous by rotating magnets. The total oxygen flux over the period of each PAR exposure was calculated using the formula:Total oxygen flux= -(δO_2×V)/(δt×A)in which δO2, δt, V and A represent the difference in oxygen concentration, the difference in time, the volume of the overlying water and the enclosed surface area, respectively.After the incubation, the sediment core was exposed to the next higher PAR by adjusting the height of the cold-light lamps and the procedure for total oxygen flux measurement was repeated. To avoid an oxygen oversaturation at the highest PAR, which would lead to an underestimation of the total oxygen flux, the overlying water of the sediment cores was aerated with helium until an oxygen concentration of 240 µmol O2/L was reached (70% oxygen saturation, controlled by above-mentioned oxygen microsensors).
DOI: 10.1594/pangaea.893270
title: Total oxygen fluxes of four sediment cores from Faro (Potter Cove, Antarctica) exposed to increasing light intensities measured in November 2016

description: Four sediment cores (50 cm length, 10 cm diameter) were collected from the Faro station (located in Potter Cove) by SCUBA divers in November 2016. The sediment cores were stored in a water bath at in situ temperature of 0.5°C. A magnetic stirrer was inserted into the core and the overlying water was permanently aerated. Thereby, the overlying water was kept homogeneous and oxygen saturated. Cold-light lamps (Osram Lumilux Cool Daylight L36W/865, Osram, Munich, Germany) were installed above the sediment cores and the emitted photosynthetically active radiation (PAR) was permanently controlled with a spherical PAR-sensor (US-SQS/L and ULM-500, Walz, Germany). The spherical PAR-sensor was placed in the water bath, adjusted to the lowest height of the sediment surface of the sediment cores, covered with sea-water and treated similar to the sediment cores.Sediment cores were exposed to PAR intensities of 0, 5, 10, 15, 20, 25, 47 and 70 µmol photons/m² s, starting with the lowest PAR. In order to enable the benthic microalgae community (microphytobenthos, MPB) to adjust to the experimental light conditions, the sediment cores were pre-incubated at each PAR intensity for 4 h. The sediment cores were closed airtight with no air bubbles in the overlying water and the volume of the overlying water was determined afterward. An optical oxygen microsensor (OXR50, Pyroscience, Aachen, Germany) with a tip size diameter of 50 µm was installed in the lid, which allowed a continuous measurement of the oxygen concentration in the overlying water. On beforehand, the microsensor was calibrated at in situ temperature with a two-point calibration using air saturated and anoxic waters (by adding sodium dithionite).The sediment cores were incubated at each PAR for ≥3 h. Measurements of oxygen concentrations were performed at a 2 s temporal resolution, while the overlying water was kept homogeneous by rotating magnets. The total oxygen flux over the period of each PAR exposure was calculated using the formula:Total oxygen flux= -(δO_2×V)/(δt×A)in which δO2, δt, V and A represent the difference in oxygen concentration, the difference in time, the volume of the overlying water and the enclosed surface area, respectively.After the incubation, the sediment core was exposed to the next higher PAR by adjusting the height of the cold-light lamps and the procedure for total oxygen flux measurement was repeated. To avoid an oxygen oversaturation at the highest PAR, which would lead to an underestimation of the total oxygen flux, the overlying water of the sediment cores was aerated with helium until an oxygen concentration of 240 µmol O2/L was reached (70% oxygen saturation, controlled by above-mentioned oxygen microsensors).
DOI: 10.1594/pangaea.893271
title: Total oxygen fluxes of four sediment cores from Isla D (Potter Cove, Antarctica) exposed to increasing light intensities measured in December 2016

description: Four sediment cores (50 cm length, 10 cm diameter) were collected from the Isla D station (located in Potter Cove) by SCUBA divers in December 2016. The sediment cores were stored in a water bath at in situ temperature of 0.5°C. A magnetic stirrer was inserted into the core and the overlying water was permanently aerated. Thereby, the overlying water was kept homogeneous and oxygen saturated. Cold-light lamps (Osram Lumilux Cool Daylight L36W/865, Osram, Munich, Germany) were installed above the sediment cores and the emitted photosynthetically active radiation (PAR) was permanently controlled with a spherical PAR-sensor (US-SQS/L and ULM-500, Walz, Germany). The spherical PAR-sensor was placed in the water bath, adjusted to the lowest height of the sediment surface of the sediment cores, covered with sea-water and treated similar to the sediment cores.Sediment cores were exposed to PAR intensities of 0, 5, 10, 15, 20, 25, 35, 47 and 70 µmol photons/m² s, starting with the lowest PAR. In order to enable the benthic microalgae community (microphytobenthos, MPB) to adjust to the experimental light conditions, the sediment cores were pre-incubated at each PAR intensity for 4 h. The sediment cores were closed airtight with no air bubbles in the overlying water and the volume of the overlying water was determined afterward. An optical oxygen microsensor (OXR50, Pyroscience, Aachen, Germany) with a tip size diameter of 50 µm was installed in the lid, which allowed a continuous measurement of the oxygen concentration in the overlying water. On beforehand, the microsensor was calibrated at in situ temperature with a two-point calibration using air saturated and anoxic waters (by adding sodium dithionite).The sediment cores were incubated at each PAR for ≥3 h. Measurements of oxygen concentrations were performed at a 2 s temporal resolution, while the overlying water was kept homogeneous by rotating magnets. The total oxygen flux over the period of each PAR exposure was calculated using the formula:Total oxygen flux= -(δO_2×V)/(δt×A)in which δO2, δt, V and A represent the difference in oxygen concentration, the difference in time, the volume of the overlying water and the enclosed surface area, respectively.After the incubation, the sediment core was exposed to the next higher PAR by adjusting the height of the cold-light lamps and the procedure for total oxygen flux measurement was repeated. To avoid an oxygen oversaturation at the highest PAR, which would lead to an underestimation of the total oxygen flux, the overlying water of the sediment cores was aerated with helium until an oxygen concentration of 240 µmol O2/L was reached (70% oxygen saturation, controlled by above-mentioned oxygen microsensors).
DOI: 10.1594/pangaea.893272
title: Density, biomass and diversity of the diatom community at Faro, Creek and Isla D in Potter Cove (King George Island) in November and December 2016

description: For benthic microalgae (microphytobenthos, MPB) community analyses, triplicates of small sediment cores (10 cm length, 3.6 cm diameter) were taken at the stations Faro, Creek and Isla D, respectively, by SCUBA divers during a field campaign to Potter Cove (King George Island, Antarctica) in November and December 2016. Additionally, one larger sediment core (50 cm length, 10 cm diameter), also collected by SCUBA divers, was subsampled for an additional MPB community sample.The upper 0.5 cm sediment layer of a sediment core was transferred into a scintillation vial and 5 mL GF/F filtered seawater (Whatman, UK) and 1 mL of 25% glutaraldehyde was added. The vial was wrapped in parafilm (Bemis Company, USA) and stored at 4°C until analyses in the home laboratory.For the identification and counting of diatoms, diatom valves were cleaned with 30% hydrogen peroxides and mounted in Naphrax after proper rinsing with deionized water (Al-Handal and Wulff, 2008a). Identification of taxa was made following established protocols (Witkowski et al., 2000; Scott and Thomas, 2005; Al-Handal and Wulff, 2008a, 2008b). Enumeration of diatom valves on the slides was made by counting intact valves on the whole slide using Zeiss Axio Image 2 compound microscope equipped with differential interphase contrast under 400-fold magnification. During the identification of taxa, the length and width of pennate valves and the diameter of centric valves were measured using a micrometer. The average length and width of at least 30 valves per taxon and the assumed height of 1 µm (Edler, 1979) were used to calculate the biovolume of diatom cells following Hillebrand et al. (1999) and Sun and Liu (2003). The diatom cell biovolumes were converted into diatom carbon biomass using a conversion factor of 0.089 pg C/ µm³ cell biovolume (Sundbäck et al., 1996). The Shannon-Wiener diversity index H' was calculated using Primer v6.
DOI: 10.1594/pangaea.893273
title: Environmental photosynthetically active radiation (PAR) at Faro (Potter Cove, King Geroge Island, Western Antarctic Peninsula) in 2015

description: The the underwater photosynthetically active radiation (PAR) at the station Faro (62° 13.35' S, 58° 40.47' W) and at Isla D (62° 13.31' S, 58° 38.30' W) were measured with Odyssey PAR-sensors (Odyssey Photosynthetic Irradiance Recording System, Data Flow Systems, Christchurch, New Zealand), installed approximately 0.5 m above the seafloor at 10 m water depth in 2015. Data from Isla D only encompass the period 11th February - 4th April and 16th November - 31st December, as the sensor was damaged probably by passing chunks of ice. The PAR-sensors were calibrated according to Deregibus et al. (2016) and measured with a maximum temporal resolution of 30 minutes.
DOI: 10.1594/pangaea.893275
title: Environmental photosynthetically active radiation (PAR) at Creek (Potter Cove, King Geroge Island, Western Antarctic Peninsula) in 2016

description: At Creek (62° 14.08' S, 58° 39.43'' W) a Li-Cor PAR sensor (LI-192, Li-Cor Biosciences, Lincoln, Nebraska, USA; factory calibrated), measured the underwater PAR with a temporal resolution of 1 second for 36 h from the 10th November to the 11th November in 2016.
DOI: 10.1594/pangaea.893274
title: Environmental photosynthetically active radiation (PAR) at Isla D (Potter Cove, King Geroge Island, Western Antarctic Peninsula) in 2015

description: The the underwater photosynthetically active radiation (PAR) at the station Faro (62° 13.35' S, 58° 40.47' W) and at Isla D (62° 13.31' S, 58° 38.30' W) were measured with Odyssey PAR-sensors (Odyssey Photosynthetic Irradiance Recording System, Data Flow Systems, Christchurch, New Zealand), installed approximately 0.5 m above the seafloor at 10 m water depth in 2015. Data from Isla D only encompass the period 11th February - 4th April and 16th November - 31st December, as the sensor was damaged probably by passing chunks of ice. The PAR-sensors were calibrated according to Deregibus et al. (2016) and measured with a maximum temporal resolution of 30 minutes.
DOI: 10.1594/pangaea.879687
title: Particle fluxes obtained from sediment trap CAST
DOI: 10.1594/pangaea.879688
title: Particle fluxes obtained from sediment trap CBBT-N
DOI: 10.1594/pangaea.879689
title: Particle fluxes obtained from sediment trap CBBT-S
DOI: 10.1594/pangaea.879690
title: Particle fluxes obtained from sediment trap EAST
DOI: 10.1594/pangaea.879691
title: Particle fluxes obtained from sediment trap EIOT
DOI: 10.1594/pangaea.879692
title: Particle fluxes obtained from sediment trap EPT
DOI: 10.1594/pangaea.879693
title: Particle fluxes obtained from sediment trap JAM
DOI: 10.1594/pangaea.879694
title: Particle fluxes obtained from sediment trap NAST
DOI: 10.1594/pangaea.879695
title: Particle fluxes obtained from sediment trap NBBT-N
DOI: 10.1594/pangaea.879696
title: Particle fluxes obtained from sediment trap NBBT-S
DOI: 10.1594/pangaea.879697
title: Particle fluxes obtained from sediment trap NEAST
DOI: 10.1594/pangaea.879698
title: Particle fluxes obtained from sediment trap SAST
DOI: 10.1594/pangaea.879699
title: Particle fluxes obtained from sediment trap SBBT
DOI: 10.1594/pangaea.879700
title: Particle fluxes obtained from sediment trap WAST
DOI: 10.1594/pangaea.879701
title: Particle fluxes obtained from sediment trap WPT
DOI: 10.1594/pangaea.883689
title: Consumption rates of Notothenia spp. and large/small amphipods on a carcass measured in ex situ feeding trials (Austral summer 2014/2015 and 2016)
DOI: 10.1594/pangaea.883690
title: Consumption rates of Hippomedon kergueleni on different food items measured in ex situ feeding trials (Austral summer 2014/2015 and 2016)
DOI: 10.1594/pangaea.894285
title: Composition of the thick suspensate deposits (C-events) sections of the sediment core SO130_275KL

description: Methods* Carbonate, TOC and TN: Total carbon and total nitrogen were analyzed on a Carlo Erba 1500 elemental analyzer (Milan, Italy) with a precision of 0.2% and 0.005%, respectively. Total organic carbon (TOC) was measured with the same instrument after samples were treated with 1 M hydrochloric acid (HCl) to remove inorganic carbon. Analytical precision for organic carbon was 0.02%. Carbonate carbon was calculated as the difference between total carbon and organic carbon.* Lithogenic matter: Lithogenic matter (%) was calculated by subtracting carbonate, organic matter and biogenic opal from 100%.
DOI: 10.1594/pangaea.894286
title: Composition of the silt turbidite sections (F-events) of the sediment core SO130_275KL

description: Methods* Carbonate, TOC and TN: Total carbon and total nitrogen were analyzed on a Carlo Erba 1500 elemental analyzer (Milan, Italy) with a precision of 0.2% and 0.005%, respectively. Total organic carbon (TOC) was measured with the same instrument after samples were treated with 1 M hydrochloric acid (HCl) to remove inorganic carbon. Analytical precision for organic carbon was 0.02%. Carbonate carbon was calculated as the difference between total carbon and organic carbon.* Lithogenic matter: Lithogenic matter (%) was calculated by subtracting carbonate, organic matter and biogenic opal from 100%.
DOI: 10.1594/pangaea.894288
title: Grain size distribution of the varved sections of the sediment core SO130_275KL
DOI: 10.1594/pangaea.894290
title: Grain size distribution of the thick suspensate deposits (C-events) sections of the sediment core SO130_275KL
DOI: 10.1594/pangaea.894291
title: Grain size distribution of the silt turbidite sections (F-events) of the sediment core SO130_275KL
DOI: 10.1594/pangaea.897414
title: Total oxygen uptake of sediment during a mesocosm experiment with addition of Palmaria decipiens and Desmarestia anceps to sediments from Potter Cove

description: Total Oxygen Uptake, calculated from change in oxygen concentration in overlying water in the cores over time.
DOI: 10.1594/pangaea.899270
title: Photographs of Potter Cove, King George Island, looking northeast towards glacier in 2019

description: Camera: Panasonic, WV-S1531L positioned at the rear entrance of Dallmann laboratory at Jubany Station. Distance between posts is approximately 4.5 m. Picture series was started in 2019 and documents ice cover in the bay, glacier front and cloud cover of the sky. Size of images: 2048 x 1536 pixel. Format: JPEG.
DOI: 10.1594/pangaea.897415
title: Nitrogen and carbon characteristics of sediment during a mesocosm experiment with addition of Palmaria decipiens and Desmarestia anceps to sediments from Potter Cove
DOI: 10.1594/pangaea.897417
title: Water chemistry of overlying water during a mesocosm experiment with addition of Palmaria decipiens and Desmarestia anceps to sediments from Potter Cove
DOI: 10.1594/pangaea.897421
title: Meiofauna carbon and nitrogen characteristics during a mesocosm experiment with addition of Palmaria decipiens and Desmarestia anceps to sediments from Potter Cove
DOI: 10.1594/pangaea.897422
title: Macrofauna nitrogen characteristics during a mesocosm experiment with addition of Palmaria decipiens and Desmarestia anceps to sediments from Potter Cove
DOI: 10.1594/pangaea.897423
title: Macrofauna carbon characteristics during a mesocosm experiment with addition of Palmaria decipiens and Desmarestia anceps to sediments from Potter Cove
DOI: 10.1594/pangaea.897424
title: Macroalgal fragment assimilation during a mesocosm experiment with addition of Palmaria decipiens and Desmarestia anceps to sediments from Potter Cove
DOI: 10.1594/pangaea.898112
title: Photographs of Potter Cove, King George Island, looking west towards Maxwell Bay in 2019

description: Camera: IQinVision, IQEye 852 positioned at the rear entrance of Dallmann laboratory at Jubany Station. Distance between posts is approximately 4.5 m. Picture series was started in 2008 and documents ice cover in the bay, glacier front and cloud cover of the sky. Size of images: 1600 x 1040 pixel. Format: JPEG.
DOI: 10.1594/pangaea.905452
title: Holocene temperature reconstructions for northeastern North America and the northwestern Atlantic, core Gulf_of_Maine
DOI: 10.1594/pangaea.912114
title: Photographs of Potter Cove, King George Island, looking northeast towards glacier in 2020

description: Camera: Panasonic, WV-S1531L positioned at the rear entrance of Dallmann laboratory at Jubany Station. Distance between posts is approximately 4.5 m. Picture series was started in 2019 and documents ice cover in the bay, glacier front and cloud cover of the sky. Size of images: 2048 x 1536 pixel. Format: JPEG.
DOI: 10.1594/pangaea.912115
title: Photographs of Potter Cove, King George Island, looking west towards Maxwell Bay in 2020

description: Camera: IQinVision, IQEye 852 positioned at the rear entrance of Dallmann laboratory at Jubany Station. Distance between posts is approximately 4.5 m. Picture series was started in 2008 and documents ice cover in the bay, glacier front and cloud cover of the sky. Size of images: 1600 x 1040 pixel. Format: JPEG.
DOI: 10.1594/pangaea.923241
title: Oxygen isotope and salinity measurements of coastal surface waters in the Gulf of Maine

description: These data include salinity and oxygen isotope measurements of water samples collected from coastal sites along the Gulf of Maine between 2003 and 2015. In particular, a suite of samples were collected along the coast of Maine, east of Penobscot Bay, on a monthly basis between April 2014 and March 2015. These data also include several freshwater samples collected from the Kennebec and Penobscot Rivers on a semi-monthly basis in 2014 and 2015.For the water samples with sample IDs starting with DSW, JSW, NSW, or OSW: The water samples were collected by hand from shore or boat using French square glass bottles with phenolic polycone lined caps. Salinity was measured using a Oakton SALT 6+ handheld salinity meter. Oxygen isotopes were measured using a Picarro L2130-i Isotopic Liquid Water Analyzer with an attached autosampler. Water samples with sample IDs starting with ASW were collected from shore. Samples with sample IDs starting with DMC 2010 were collected at the flowing seawater laboratory at the Darling Marine Center. Samples with sample IDs starting with Summer 2011 were collected from a boat. For these last 3 sample types (ASW, DMC 2010, Summer 2011): Salinity was measured with YSI Professional Plus salinity meter and oxygen isotopes were measured using a Picarro L1102-i Isotopic Liquid Water Analyzer with an attached autosampler. Data from Owen et al., 2008 and Wanamaker et al. (2006, 2007) was collected from the flowing seawater laboratory at the Darling marine center. Salinity was measured using a YSI model 85 oxygen, conductivity, salinity, and temperature system and oxygen isotopes were measured using a dual-inlet VG/Micromass SIRA (CO2–H2O equilibration method at 30 °C for 12 h).
DOI: 10.1594/pangaea.927574
title: Photographs of Potter Cove, King George Island, looking west towards Maxwell Bay in 2021

description: Camera: IQinVision, IQEye 852 positioned at the rear entrance of Dallmann laboratory at Jubany Station. Distance between posts is approximately 4.5 m. Picture series was started in 2008 and documents ice cover in the bay, glacier front and cloud cover of the sky. Size of images: 1600 x 1040 pixel. Format: JPEG.
DOI: 10.1594/pangaea.927576
title: Photographs of Potter Cove, King George Island, looking northeast towards glacier in 2021

description: Camera: Panasonic, WV-S1531L positioned at the rear entrance of Dallmann laboratory at Jubany Station. Distance between posts is approximately 4.5 m. Picture series was started in 2019 and documents ice cover in the bay, glacier front and cloud cover of the sky. Size of images: 2048 x 1536 pixel. Format: JPEG.
DOI: 10.1594/pangaea.943849
title: Photographs of Potter Cove, King George Island, looking northeast towards glacier in 2022

description: Camera: Panasonic, WV-S1531L positioned at the rear entrance of Dallmann laboratory at Jubany Station. Distance between posts is approximately 4.5 m. Picture series was started in 2019 and documents ice cover in the bay, glacier front and cloud cover of the sky. Size of images: 2048 x 1536 pixel. Format: JPEG.
DOI: 10.1594/pangaea.943853
title: Photographs of Potter Cove, King George Island, looking west towards Maxwell Bay in 2022

description: Camera: IQinVision, IQEye 852 positioned at the rear entrance of Dallmann laboratory at Jubany Station. Distance between posts is approximately 4.5 m. Picture series was started in 2008 and documents ice cover in the bay, glacier front and cloud cover of the sky. Size of images: 1600 x 1040 pixel. Format: JPEG.
DOI: 10.1594/pangaea.955824
title: Photographs of Potter Cove, King George Island, looking northeast towards glacier in 2023

description: The dataset contains the photos of Potter Cove, taken near Carlini Base in 2023. Camera: Panasonic, WV-S1531L positioned at the rear entrance of Dallmann laboratory at Jubany Station. Distance between posts is approximately 4.5 m. Picture series was started in 2019 and documents ice cover in the bay, glacier front and cloud cover of the sky. Size of images: 2048 x 1536 pixel. Format of the photos is JPG.