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  • 1
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    Unknown
    Physical oceanography measured on water bottle samples based on ship CTD during RV POLARSTERN cruise PS124 (2023)
    PANGAEA
    Details
    Publication Date: 2024-04-20
    Description: This dataset contains the hydrographic bottle data collected with the ship based CTD rosette during the cruise PS124 - COSMUS (Continental Shelf Multidisciplinary Flux Study). The CTD is an SBE911plus with 24 bottles, 12 liters each. The CTD/Rosette was equipped with duplicate sensors for temperature, salinity, and oxygen, and one sensor each for pressure, substance fluorescence Chl. a, and beam transmission. An altimeter was mounted to monitor the distance to the seafloor. The CTD profile data, the cruise report as well as publications using this data are linked below.
    Keywords: Antarctic; Antarctica; Attenuation, optical beam transmission; AWI_PhyOce; bottle; Bottle data; Bottle number; Chlorophyll a; Conductivity; COSMUS; CTD; 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, WET Labs, ECO FLRTD; CTD, Sea-Bird, SBE 911plus; measured with Transmissometer, WET Labs, C-Star; CTD/Rosett; CTD/Rosette; CTD casts; CTD data; CTD-RO; DATE/TIME; Density, potential anomaly; DEPTH, water; Event label; Filchner; Filchner Ice Shelf; Filchner Trough; GPF 19-2_039, COSMUS; LATITUDE; LONGITUDE; Oxygen; Oxygen, dissolved; Oxygen saturation; Physical Oceanography @ AWI; Polarstern; Pressure, water; PS124; PS124_100-1; PS124_10-1; PS124_107-1; PS124_109-1; PS124_110-1; PS124_11-1; PS124_111-1; PS124_111-2; PS124_112-1; PS124_11-4; PS124_115-1; PS124_117-1; PS124_12-1; PS124_13-1; PS124_16-2; PS124_20-1; PS124_21-1; PS124_22-2; PS124_23-2; PS124_24-1; PS124_26-2; PS124_26-6; PS124_27-2; PS124_30-1; PS124_31-1; PS124_32-1; PS124_33-1; PS124_34-1; PS124_35-1; PS124_36-1; PS124_37-1; PS124_38-1; PS124_40-1; PS124_41-1; PS124_42-1; PS124_43-1; PS124_44-1; PS124_45-2; PS124_46-1; PS124_47-1; PS124_48-1; PS124_49-2; PS124_50-1; PS124_51-1; PS124_5-2; PS124_52-1; PS124_5-4; PS124_54-2; PS124_54-3; PS124_55-1; PS124_56-1; PS124_57-1; PS124_58-1; PS124_59-1; PS124_60-1; PS124_61-1; PS124_6-2; PS124_62-1; PS124_64-1; PS124_65-2; PS124_66-1; PS124_68-2; PS124_68-3; PS124_72-1; PS124_7-4; PS124_74-2; PS124_76-1; PS124_77-3; PS124_78-1; PS124_80-1; PS124_81-1; PS124_82-1; PS124_83-1; PS124_84-1; PS124_8-5; PS124_86-1; PS124_88-1; PS124_8-9; PS124_90-4; PS124_9-1; PS124_91-2; PS124_93-1; PS124_93-2; PS124_95-1; PS124_96-1; PS124_98-1; Salinity; Salinity, absolute; Temperature, water; Temperature, water, conservative; Temperature, water, potential; Weddell Sea
    Type: Dataset
    Format: text/tab-separated-values, 28224 data points
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 2
    facet.materialart.
    Unknown
    Physical oceanography based on ship CTD during RV POLARSTERN cruise PS124 (2023)
    PANGAEA
    Details
    Publication Date: 2024-05-19
    Description: This dataset contains the hydrographic profile data collected with the ship based CTD rosette during the cruise PS124 - COSMUS (Continental Shelf Multidisciplinary Flux Study). The CTD is an SBE911plus with 24 bottles, 12 liters each. The CTD/Rosette was equipped with duplicate sensors for temperature, salinity, and oxygen, and one sensor each for pressure, substance fluorescence Chl. a, and beam transmission. An altimeter was mounted to monitor the distance to the seafloor. The dataset contains calibrated and quality-controlled parameters as well as uncalibrated parameters, where no quality control was applied. 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 . The CTD bottle data, the cruise report as well as publications using this data are linked below. Additional information on the sensor used for the final data set as well as the water depth is given in a separate info-file.
    Keywords: Antarctic; Antarctica; Attenuation, optical beam transmission; AWI_PhyOce; Chlorophyll a; Conductivity; COSMUS; CTD; 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, WET Labs, ECO FLRTD; CTD, Sea-Bird, SBE 911plus; measured with Transmissometer, WET Labs, C-Star; CTD/Rosett; CTD/Rosette; CTD casts; CTD data; CTD profiles; CTD-RO; DATE/TIME; Density, potential anomaly; DEPTH, water; Event label; Filchner; Filchner Ice Shelf; Filchner Trough; GPF 19-2_039, COSMUS; LATITUDE; LONGITUDE; Oxygen; Oxygen, dissolved; Oxygen saturation; Physical Oceanography @ AWI; Polarstern; Pressure, water; PS124; PS124_100-1; PS124_10-1; PS124_107-1; PS124_109-1; PS124_110-1; PS124_11-1; PS124_111-1; PS124_111-2; PS124_112-1; PS124_11-4; PS124_115-1; PS124_117-1; PS124_12-1; PS124_13-1; PS124_16-2; PS124_20-1; PS124_21-1; PS124_22-2; PS124_23-2; PS124_24-1; PS124_26-2; PS124_26-6; PS124_27-2; PS124_30-1; PS124_31-1; PS124_32-1; PS124_33-1; PS124_34-1; PS124_35-1; PS124_36-1; PS124_37-1; PS124_38-1; PS124_40-1; PS124_41-1; PS124_42-1; PS124_43-1; PS124_44-1; PS124_45-2; PS124_46-1; PS124_47-1; PS124_48-1; PS124_49-2; PS124_50-1; PS124_51-1; PS124_5-2; PS124_52-1; PS124_53-1; PS124_5-4; PS124_54-2; PS124_54-3; PS124_55-1; PS124_56-1; PS124_57-1; PS124_58-1; PS124_59-1; PS124_60-1; PS124_61-1; PS124_6-2; PS124_62-1; PS124_64-1; PS124_65-2; PS124_66-1; PS124_68-2; PS124_68-3; PS124_72-1; PS124_7-4; PS124_74-2; PS124_76-1; PS124_77-3; PS124_78-1; PS124_80-1; PS124_81-1; PS124_82-1; PS124_83-1; PS124_84-1; PS124_8-5; PS124_86-1; PS124_88-1; PS124_8-9; PS124_90-3; PS124_90-4; PS124_9-1; PS124_91-2; PS124_93-1; PS124_93-2; PS124_95-1; PS124_96-1; PS124_98-1; Quality flag, attenuation; Quality flag, chlorophyll; Quality flag, conductivity; Quality flag, oxygen; Quality flag, salinity; Quality flag, water temperature; Salinity; Salinity, absolute; Seadatanet flag: Data quality control procedures according to SeaDataNet (2010); Temperature, water; Temperature, water, conservative; Temperature, water, potential; Weddell Sea
    Type: Dataset
    Format: text/tab-separated-values, 1415321 data points
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 3
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    Unknown
    Summertime increases in upper-ocean stratification and mixed-layer depth (2021)
    Nature Research
    Details
    Publication Date: 2024-02-07
    Description: The surface mixed layer of the world ocean regulates global climate by controlling heat and carbon exchange between the atmosphere and the oceanic interior1,2,3. The mixed layer also shapes marine ecosystems by hosting most of the ocean’s primary production4 and providing the conduit for oxygenation of deep oceanic layers. Despite these important climatic and life-supporting roles, possible changes in the mixed layer during an era of global climate change remain uncertain. Here we use oceanographic observations to show that from 1970 to 2018 the density contrast across the base of the mixed layer increased and that the mixed layer itself became deeper. Using a physically based definition of upper-ocean stability that follows different dynamical regimes across the global ocean, we find that the summertime density contrast increased by 8.9 ± 2.7 per cent per decade (10−6–10−5 per second squared per decade, depending on region), more than six times greater than previous estimates. Whereas prior work has suggested that a thinner mixed layer should accompany a more stratified upper ocean5,6,7, we find instead that the summertime mixed layer deepened by 2.9 ± 0.5 per cent per decade, or several metres per decade (typically 5–10 metres per decade, depending on region). A detailed mechanistic interpretation is challenging, but the concurrent stratification and deepening of the mixed layer are related to an increase in stability associated with surface warming and high-latitude surface freshening8,9, accompanied by a wind-driven intensification of upper-ocean turbulence10,11. Our findings are based on a complex dataset with incomplete coverage of a vast area. Although our results are robust within a wide range of sensitivity analyses, important uncertainties remain, such as those related to sparse coverage in the early years of the 1970–2018 period. Nonetheless, our work calls for reconsideration of the drivers of ongoing shifts in marine primary production, and reveals stark changes in the world’s upper ocean over the past five decades.
    Type: Article , PeerReviewed
    Format: text
    Format: text
    Format: text
    Format: text
    Location Call Number Limitation Availability
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    OceanRep: Article in a Scientific Journal - peer-reviewed
  • 4
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    Unknown
    Exceptionally Warm and Prolonged Flow of Warm Deep Water Toward the Filchner‐Ronne Ice Shelf in 2017 (2020)
    In:  EPIC3Geophysical Research Letters, 47(13), ISSN: 0094-8276
    Details
    Publication Date: 2020-07-07
    Description: The Filchner-Ronne Ice Shelf, fringing the southern Weddell Sea, is Antarctica's second largest ice shelf. At present, basal melt rates are low due to active dense water formation; however, model projections suggest a drastic increase in the future due to enhanced inflow of open-ocean warm water. Mooring observations from 2014 to 2016 along the eastern flank of the Filchner Trough (76°S) revealed a distinct seasonal cycle with inflow of Warm Deep Water during summer and autumn. Here we present extended time series showing an exceptionally warm and long inflow in 2017, with maximum temperatures exceeding 0.5°C. Warm temperatures persisted throughout winter, associated with a fresh anomaly, which lead to a change in stratification over the shelf, favoring an earlier inflow in the following summer. We suggest that the fresh anomaly developed upstream after anomalous summer sea ice melting and contributed to a shoaling of the shelf break thermocline.
    Repository Name: EPIC Alfred Wegener Institut
    Type: Article , isiRev
    Format: application/pdf
    Location Call Number Limitation Availability
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    PAPER (OA)
  • 5
    facet.materialart.
    Unknown
    Exceptionally Warm and Prolonged Flow of Warm Deep Water Toward the Filchner-Ronne Ice Shelf in 2017 (2021)
    Details
    Publication Date: 2021-10-13
    Description: The Filchner-Ronne Ice Shelf, fringing the southern Weddell Sea, is Antarctica's second largest ice shelf. At present, basal melt rates are low due to active dense water formation; however, model projections suggest a drastic increase in the future due to enhanced inflow of open-ocean warm water. Mooring observations from 2014 to 2016 along the eastern flank of the Filchner Trough (76°S) revealed a distinct seasonal cycle with inflow if Warm Deep Water during summer and autumn. Here we present extended time series showing an exceptionally warm and long inflow in 2017, with maximum temperatures exceeding 0.5°C. Warm temperatures persisted throughout winter, associated with a fresh anomaly, which lead to a change in stratification over the shelf, favoring an earlier inflow in the following summer. We suggest that the fresh anomaly developed upstream after anomalous summer sea ice melting and contributed to a shoaling of the shelf break thermocline.
    Keywords: 551.46 ; ocean-ice shelf interaction ; Weddell Sea ; warm inflow ; Antarctic Slope Front ; Filchner-Ronne Ice Shelf
    Language: English
    Type: map
    Location Call Number Limitation Availability
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    CITATION GEO-LEO
  • 6
    facet.materialart.
    Unknown
    Exceptionally warm and prolonged flow of warm deep water toward the Filchner-Ronne Ice Shelf in 2017 (2020)
    Wiley
    Details
    Publication Date: 2022-10-26
    Description: © The Author(s), 2020. This article is distributed under the terms of the Creative Commons Attribution License. The definitive version was published in Ryan, S., Hellmer, H. H., Janout, M., Darelius, E., Vignes, L., & Schroeder, M. Exceptionally warm and prolonged flow of warm deep water toward the Filchner-Ronne Ice Shelf in 2017. Geophysical Research Letters, 47(13),(2020): e2020GL088119, doi:10.1029/2020GL088119.
    Description: The Filchner‐Ronne Ice Shelf, fringing the southern Weddell Sea, is Antarctica's second largest ice shelf. At present, basal melt rates are low due to active dense water formation; however, model projections suggest a drastic increase in the future due to enhanced inflow of open‐ocean warm water. Mooring observations from 2014 to 2016 along the eastern flank of the Filchner Trough (76°S) revealed a distinct seasonal cycle with inflow if Warm Deep Water during summer and autumn. Here we present extended time series showing an exceptionally warm and long inflow in 2017, with maximum temperatures exceeding 0.5°C. Warm temperatures persisted throughout winter, associated with a fresh anomaly, which lead to a change in stratification over the shelf, favoring an earlier inflow in the following summer. We suggest that the fresh anomaly developed upstream after anomalous summer sea ice melting and contributed to a shoaling of the shelf break thermocline.
    Description: The authors would like to express their gratitude to the officers and crews of RV Polarstern (cruises PS92 [Grant AWI_PS82_02], PS96 [Grant AWI_PS96_01], and PS111 [Grant AWI_PS111_01]), RRS Ernest Shackleton (Cruise ES060), and RSS James Clark Ross (Cruise JR16004) for their efficient assistance. E. D. received funding from the project TOBACO (267660), POLARPROG, Norges Forskningsrd.
    Keywords: Ocean-ice shelf interaction ; Weddell Sea ; Warm inflow ; Antarctic Slope Front ; Filchner-Ronne Ice Shelf
    Repository Name: Woods Hole Open Access Server
    Type: Article
    Location Call Number Limitation Availability
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    PAPER (OA)
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