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  • PANGAEA  (6)
  • AWI Computing and Data Centre  (1)
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  • 1
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    PANGAEA
    In:  Supplement to: Poggemann, David-Willem; Nürnberg, Dirk; Hathorne, Ed C; Frank, Martin; Rath, Willi; Reissig, Stefan; Bahr, André (2018): Deglacial Heat Uptake by the Southern Ocean and Rapid Northward Redistribution Via Antarctic Intermediate Water. Paleoceanography and Paleoclimatology, 33(11), 1292-1305, https://doi.org/10.1029/2017PA003284
    Publication Date: 2023-01-13
    Description: Antarctic Intermediate Water (AAIW) is an important conduit for nutrients to reach the nutrient-poor low-latitude ocean areas. In the Atlantic, it forms part of the return path of the Atlantic Meridional Overturning Circulation (AMOC). Despite the importance of AAIW, little is known about variations in its composition and signature during the prominent AMOC and climate changes of the last deglaciation. Here, we reconstruct benthic foraminiferal Mg/Ca-based intermediate water temperatures (IWTMg/Ca) and intermediate water neodymium (Nd) isotope compositions at sub-millennial resolution from unique sediment cores located at the northern tip of modern AAIW extent in the tropical W-Atlantic (core M78/235-1, 850 water depth, and core M78/222-9, 1018 m water depth). Our data indicate a pronounced warming of AAIW in the tropical W-Atlantic during Heinrich Stadial 1 (HS1) and the Younger Dryas (YD). We argue that these warming events were induced by major AMOC perturbations resulting in the pronounced accumulation of heat in the surface Southern Ocean. Combined with published results, our data suggest the subsequent uptake of Southern Ocean heat by AAIW and its rapid northward transfer to the tropical W-Atlantic. Hence, the rapid deglacial northern climate perturbations directly controlled the AAIW heat budget in the tropical W-Atlantic after a detour via the Southern Ocean. We speculate that the ocean heat redistribution via AAIW effectively dampened Southern Hemisphere warming during the deglaciation and may therefore have been a crucial player in the climate seesaw mechanisms between the two hemispheres.
    Type: Dataset
    Format: application/zip, 2 datasets
    Location Call Number Limitation Availability
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  • 2
    Publication Date: 2023-03-03
    Keywords: 222-9; AGE; DEPTH, sediment/rock; GC; Gravity corer; Laboratory; M78/1; M78/1_222-9; Meteor (1986); Plankton station 7; ε-Neodymium; ε-Neodymium, error
    Type: Dataset
    Format: text/tab-separated-values, 75 data points
    Location Call Number Limitation Availability
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  • 3
    Publication Date: 2023-03-03
    Keywords: 235-1; AGE; DEPTH, sediment/rock; M78/1; M78/1_235-1; Meteor (1986); N. Tobago; PC; Piston corer; Temperature, water; Uvigerina spp., Aluminium/Calcium ratio; Uvigerina spp., Iron/Calcium ratio; Uvigerina spp., Magnesium/Calcium ratio; Uvigerina spp., Manganese/Calcium ratio
    Type: Dataset
    Format: text/tab-separated-values, 1162 data points
    Location Call Number Limitation Availability
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  • 4
    Publication Date: 2023-05-05
    Description: PREFCLIM is a mixed-layer climatology for the Eastern Tropical Atlantic. The climatology contains a high-resolution (0.25 degrees) monthly-mean mixed-layer hydrography (mixed-layer depth, temperature, salinity), and coarse-resolution (2.5 degrees) estimates of the mixed-layer heat and salt balance, as well as of near-surface velocities and of air-sea fluxes. All existing hydrographic products of the region were hampered by the sparse availability of near-shore data owned by the West-African coastal countries, which could, however, be included in the new climatology.
    Keywords: File content; File format; File name; File size; Model; PREFCLIM; Uniform resource locator/link to file
    Type: Dataset
    Format: text/tab-separated-values, 24 data points
    Location Call Number Limitation Availability
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  • 5
    Publication Date: 2024-04-20
    Description: Two Teledyne RDI Ocean Surveyor systems with 38 and 75 kHz transmission frequency were used. Data was processed with a software package developed at GEOMAR following the GO-SHIP standards (Firing and Hummon, 2010). The data was subsequently averaged over one minute intervals and converted to a NetCDF based format.
    Keywords: Acoustic Doppler Current Profiling, vessel-mounted (VM-ADCP); Binary Object; Binary Object (File Size); Binary Object (Media Type); CT; Description; GA08; GEOTRACES; Global marine biogeochemical cycles of trace elements and their isotopes; M121; M121-track; Meteor (1986); Underway cruise track measurements
    Type: Dataset
    Format: text/tab-separated-values, 4 data points
    Location Call Number Limitation Availability
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  • 6
    Publication Date: 2024-04-20
    Description: A projection of larval dispersal patterns of Atlantic cold seep mussels Gigantidas childressi, G. mauritanicus, Bathymodiolus heckerae and B. boomerang was carried out for the next 50 years under the constraint of global warming predicted by the IPCC for the most pessismistic scenario. Simulations were run at +00 years, +25 years and +50 years from initial years of 2014 to 2019 (+00Y) at 21 locations on the US, European and African coasts using the VIKING20X model, in which the Atlantic water temperatures predicted by the FOCI model were forced to the future dates. The dataset consists of a number of 5775 simulations carried out over 5 years X 5 spawning dates per prediction period (+00Y, +25Y, +50Y) with, for predictions at +25Y and +50Y, a repetition of simulations per quantile (0.025, 0.16, 0.5, 0.67 and 0.975) to take into account for the most extreme variations in water mass temperatures predicted by the FOCI model for a given date.
    Keywords: Analysis; Atlantic; Atlantic_Larval_Dispersal_Modelling_Experiment; Barbados_Prism_Kick_em_Jenny_crater_(KJC); Barbados_Prism_Trinidad_prism_(TRI); Barbados Prism; Bathymodiolus; Binary Object; Binary Object (File Size); Binary Object (Media Type); Climate change predictions; DATE/TIME; ELEVATION; Event label; EXP; Experiment; Experiment duration; File content; Gigantidas; Gulf_of_Guinea_Guiness_(GUIN); Gulf_of_Guinea_Nigeria_margin_(NM); Gulf_of_Guinea_West_Africa_margin_(WAM); Gulf_of_Mexico_Alaminos_Canyon_(AC); Gulf_of_Mexico_Brine_Pool_(BP); Gulf_of_Mexico_Louisiana_Slope_(LS); Gulf of Guinea; Gulf of Mexico; iAtlantic; Index; Integrated Assessment of Atlantic Marine Ecosystems in Space and Time; larval dispersal modelling; LATITUDE; Location; LONGITUDE; Mid-Atlantic_Ridge_Logatchev_seeps_(LOG); Mid-Atlantic Ridge; Model; N_Mid-Atlantic_Ridge_Atlantis_Fracture_Zone_(LOST); NE_Atlantic_margin_Gulf_of_Cadiz_(GC); NE_Atlantic_margin_SWIM_fault_(SWIM); NE Atlantic margin; North_Brazil_margin_Amazon_fan_(AM); North Brazil margin; North Mid-Atlantic Ridge; Ocean and sea region; Particles; Quantile; Regime; seep mussels; South_Brazil_margin_Sao_Paulo_1_(SP); South_Brazil_margin_Sao_Paulo_2_(SPD); South Brazil margin; Speed, swimming; Temperature, water; US_Atlantic_Margin_Baltimore_Canyon_(BC); US_Atlantic_Margin_Bodie_Island_(BI); US_Atlantic_Margin_New_England_(NE); US_Atlantic_Margin_Norfolk_Canyon_(NC); US Atlantic Margin; VIKING20X; West_Africa_Margin_Arguin_bank_(ARG); West_Africa_Margin_Cadamostro_Seamount_(CS); West Africa Margin
    Type: Dataset
    Format: text/tab-separated-values, 74550 data points
    Location Call Number Limitation Availability
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  • 7
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    AWI Computing and Data Centre
    In:  EPIC3Second Data Science Symposium, Bremerhaven, Auditorium Nordseemuseum, 2018-12-06-2018-12-06Bremerhaven, AWI Computing and Data Centre
    Publication Date: 2020-03-16
    Description: The second Data Science Symposium at AWI gathered several data science related talks from AWI, GEOMAR and HZG.
    Repository Name: EPIC Alfred Wegener Institut
    Type: Conference , notRev
    Format: application/pdf
    Location Call Number Limitation Availability
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