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  • 2020-2022  (4)
  • 2005-2009  (27)
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Year
  • 1
    Book
    Book
    Identification of seafloor provinces : specific applications at the deep-sea Håkon Mosby Mud Volcano and the North Sea = Identifikation von Meeresboden-Provinzen : Fallstudien am Tiefsee-Schlammvulkan Håkon Mosby und in der Nordsee (2007)
    Bremerhaven : Alfred-Wegener-Inst. für Polar- und Meeresforschung
    Details Availability
    Keywords: Ocean bottom ; Mud volcanoes ; Deep sea ecology ; Hochschulschrift ; Nordsee-Senke ; Schlammvulkan ; Gesteinsprovinz ; Schildvulkan ; Barentssee ; Nordsee ; Meeresboden ; Meeresgeologie ; Schlammvulkan ; Daten ; Nordsee ; Meeresboden ; Vulkan
    Type of Medium: Book
    Pages: XIII, 165 S. , Ill., graph. Darst., Kt.
    Series Statement: Berichte zur Polar- und Meeresforschung 542
    URL: http://www.gbv.de/dms/hebis-darmstadt/toc/184221706.pdf
    RVK:
    RY 20075
    RVK:
    TI 7300
    Language: English
    Note: Mit e. Zsfass. in engl. u. dt. Sprache , Zugl.: Bremen, Univ., Diss., 2006
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  • 2
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    Bathymetrical Map of the North Sea, Skagerrak and Kattegat (2006)
    PANGAEA
    In:  Alfred Wegener Institute, Helmholtz Centre for Polar and Marine Research, Bremerhaven
    Details
    Publication Date: 2023-03-16
    Type: Dataset
    Format: application/zip, 3.9 MBytes
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    DATA PANGAEA
  • 3
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    Benthic organic carbon flux and oxygen penetration depth in the Southern Ocean (2009)
    PANGAEA
    In:  Supplement to: Sachs, Oliver; Sauter, Eberhard-Jürgen; Schlüter, Michael; Rutgers van der Loeff, Michiel M; Jerosch, Kerstin; Holby, Ola (2009): Benthic organic carbon flux and oxygen penetration reflect different plankton provinces in the Southern Ocean. Deep Sea Research Part I: Oceanographic Research Papers, 56(8), 1319-1335, https://doi.org/10.1016/j.dsr.2009.02.003
    Details
    Publication Date: 2024-07-01
    Description: For the investigation of organic carbon fluxes reaching the seafloor, oxygen microprofiles were measured at 145 sites in different sub-regions of the Southern Ocean. At eleven sites, an in situ oxygen microprofiler was deployed for the measurement of oxygen profiles and the calculation of organic carbon fluxes. At four sites, both in situ and ex situ data were determined for high latitudes. Based on this dataset as well as on previous published data, a relationship was established for the estimation of fluxes derived by ex situ measured O2 profiles. The fluxes of labile organic matter range from 0.5 to 37.1 mgC m**2/day. The high values determined by in situ measurements were observed in the Polar Front region (water depth of more than 4290 m) and are comparable to organic matter fluxes observed for high-productivity, upwelling areas like off West Africa. The oxygen penetration depth, which reflects the long-term organic matter flux to the sediment, was correlated with assemblages of key diatom species. In the Scotia Sea (~3000 m water depth), oxygen penetration depths of less than 15 cm were observed, indicating high benthic organic carbon fluxes. In contrast, the oxic zone extends down to several decimeters in abyssal sediments of the Weddell Sea and the southeastern South Atlantic. The regional pattern of organic carbon fluxes derived from micro-sensor data suggest that episodic and seasonal sedimentation pulses are important for the carbon supply to the seafloor of the deep Southern Ocean.
    Keywords: Adelaide Island; Agulhas Basin; Amundsen Sea; Antarctic Peninsula; ANT-V/4; ANT-VI/2; ANT-VI/3; ANT-VIII/3; ANT-VIII/6; ANT-X/5; ANT-X/6; ANT-XI/3; ANT-XXI/4; ANT-XXIV/2; Anvers Island; Area/locality; Atka Bay; Atlantic Ridge; AWI_Paleo; B_LANDER; Barents Sea; BC; Bellingshausen Sea; Benthic Oxygen Lander System; Biological province; BOLAS; Bottom lander; Box corer; Bransfield Strait; Calculated; Camp Norway; Carbon, organic, flux; Comment; CTD/Rosette; CTD-RO; DATE/TIME; Depth, bathymetric; DEPTH, sediment/rock; Drake Passage; Eastern Weddell Sea, Southern Ocean; ECOFER; Event label; Factor; Filchner Shelf; Filchner Trough; Fram Strait; Gear; Giant box corer; GKG; Gravity corer (Kiel type); H1; H2; Halley Bay; Kapp Norvegia; KTB-06; KTB-11; KTB-13; KTB-16; KTB-19; KTB-23; KTB-26; KTB-28; KTB-33; Latitude of event; Lazarev Sea; Le Suroît; Longitude of event; Lyddan Island; M3; Marguerite Bay; MUC; MultiCorer; Oxygen, microelectrode; Oxygen penetration depth; Oxygen penetration depth, standard deviation; Paleoenvironmental Reconstructions from Marine Sediments @ AWI; Polarstern; Priority Programme 1158 Antarctic Research with Comparable Investigations in Arctic Sea Ice Areas; PS10; PS10/672; PS10/675; PS10/678; PS10/684; PS10/686; PS10/688; PS10/690; PS10/694; PS10/697; PS10/699; PS10/701; PS10/703; PS10/707; PS10/711; PS10/719; PS10/725; PS10/738; PS10/740; PS10/748; PS10/757; PS10/760; PS10/762; PS10/766; PS10/778; PS10/782; PS10/784; PS10/794; PS10/804; PS10/813; PS10/816; PS10/818; PS10/820; PS10/824; PS12; PS12/116; PS12/128; PS12/143; PS12/186; PS12/193; PS12/201; PS12/300; PS12/310; PS12/312; PS12/319; PS12/336; PS12/338; PS12/340; PS12/348; PS12/374; PS12/380; PS12/458; PS12/465; PS12/472; PS12/486; PS12/490; PS12/526; PS1472-1; PS1474-1; PS1475-1; PS1477-1; PS1478-1; PS1479-1; PS1480-2; PS1481-2; PS1482-2; PS1483-2; PS1484-2; PS1485-1; PS1486-2; PS1487-1; PS1488-2; PS1489-3; PS1490-2; PS1491-3; PS1492-1; PS1493-2; PS1494-3; PS1495-1; PS1496-2; PS1498-1; PS1499-2; PS1500-2; PS1501-1; PS1502-1; PS1505-1; PS1506-2; PS1507-2; PS1508-2; PS1509-2; PS1537-2; PS1543-1; PS1549-1; PS1555-2; PS1557-1; PS1565-3; PS1590-1; PS1595-2; PS1596-2; PS1599-2; PS16; PS16/267; PS16/281; PS16/294; PS16/306; PS16/311; PS16/321; PS16/337; PS16/342; PS16/362; PS16/515; PS16/516; PS16/540; PS16/549; PS16/559; PS1605-2; PS1606-2; PS1607-2; PS1611-4; PS1622-2; PS1625-2; PS1635-3; PS1636-2; PS1637-2; PS1638-2; PS1639-2; PS1645-2; PS1751-2; PS1755-7; PS1759-1; PS1765-1; PS1768-1; PS1772-6; PS1776-6; PS1777-7; PS1782-6; PS1811-1; PS1812-1; PS1823-5; PS1826-6; PS1832-4; PS22; PS22/712; PS22/714; PS22/721; PS22/769; PS22/773; PS22/776; PS22/786; PS22/788; PS22/790; PS22/791; PS22/797; PS22/802; PS22/803; PS22/804; PS22/805; PS22/810; PS22/812; PS22/813; PS22/814; PS22/815; PS22/816; PS22/860; PS22/872; PS22/876; PS22/891; PS22/899; PS22/902; PS22/917; PS22/941; PS22/947; PS22/973; PS22 06AQANTX_5; PS2257-1; PS2258-1; PS2262-1; PS2276-2; PS2278-5; PS2280-1; PS2288-1; PS2290-1; PS2292-1; PS2293-1; PS2299-1; PS2304-2; PS2305-1; PS2306-1; PS2307-2; PS2312-1; PS2314-1; PS2315-1; PS2316-1; PS2317-1; PS2318-1; PS2357-2; PS2361-1; PS2362-1; PS2365-1; PS2365-2; PS2366-1; PS2367-1; PS2370-4; PS2371-1; PS2372-1; PS2376-1; PS2376-4; PS2522-1; PS2527-1; PS2528-1; PS2537-1; PS2538-1; PS2539-2; PS2542-1; PS2543-3; PS2546-1; PS2547-2; PS2548-2; PS2550-1; PS2553-2; PS2556-1; PS29; PS29/010; PS29/021; PS29/022; PS29/045; PS29/046; PS29/047; PS29/050; PS29/051; PS29/062; PS29/063; PS29/064; PS29/066; PS29/070; PS29/075; PS65; PS65/594-3; PS65/596-2; PS65/598-1; PS65/600-1; PS65/600-2; PS65/701-2; PS65/703-1; PS65/703-2; PS65/705-1; PS71/013-12; PS71/013-2; PS71/017-12; PS71/033-19; PS71/039-10; PS71/039-4; PS71/047-1; PS71/084-1; PS71/085-1; PS71/085-5; PS71/090-2; PS71 ANDEEP-SYSTCO SCACE; Reference of data; S1; S2; S6; S7; S8; S9; Sample method; Scotia Sea, southwest Atlantic; Season; Shona Ridge; SL; South Atlantic Ocean; South Sandwich Basin; SPP1158; Total mass, flux per day; Uniform resource locator/link to reference; Vestkapp; Weddell Sea; Wegener Canyon
    Type: Dataset
    Format: text/tab-separated-values, 1489 data points
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    DATA PANGAEA
  • 4
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    Seabed video and still images from the northern Weddell Sea and the western flanks of the Powell Basin (2021)
    In:  EPIC3Earth System Science Data, 13(2), pp. 609-615, ISSN: 1866-3516
    Details
    Publication Date: 2021-07-05
    Description: Research vessels equipped with fibre optic and copper-cored coaxial cables support the live onboard inspection of high-bandwidth marine data in real time. This allows for towed still-image and video sleds to be equipped with latest-generation higher-resolution digital camera systems and additional sensors. During RV Polarstern expedition PS118 in February–April 2019, the recently developed Ocean Floor Observation and Bathymetry System (OFOBS) of the Alfred Wegener Institute was used to collect still-image and video data from the seafloor at a total of 11 predominantly ice-covered locations in the northern Weddell Sea and Powell Basin. Still images of 26-megapixel resolution and HD (high-definition) quality video data were recorded throughout each deployment. In addition to downward-facing video and still-image cameras, the OFOBS also mounted side-scanning and forward-facing acoustic systems, which facilitated safe deployment in areas of high topographic complexity, such as above the steep flanks of the Powell Basin and the rapidly shallowing, iceberg-scoured Nachtigaller Shoal. To localise collected data, the OFOBS system was equipped with a Posidonia transponder for ultra-short baseline triangulation of OFOBS positions. All images are available from: https://doi.org/10.1594/PANGAEA.911904 (Purser et al., 2020).
    Repository Name: EPIC Alfred Wegener Institut
    Type: Article , isiRev
    Format: application/pdf
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  • 5
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    Default versus Configured - Geostatistical modelling of Suspended Particulate Matter in Potter Cove, West Antarctic Peninsula (2020)
    MDPI
    In:  EPIC3Fluids, MDPI, 5(4), pp. 235-256, ISSN: 2311-5521
    Details
    Publication Date: 2020-12-10
    Description: The glacier retreat observed during the last decades at Potter Cove (PC) causes an increasing amount of suspended particulate matter (SPM) in the water column, which has a high impact on sessile filter feeder’ species at PC located at the West Antarctic Peninsula. SPM presents a highly-fluctuating dynamic pattern on a daily, monthly, seasonal, and interannual basis. Geostatistical interpolation techniques are widely used by default to generate reliable spatial information and thereby to improve the ecological understanding of environmental variables, which is often fundamental for guiding decision-makers and scientists. In this study, we compared the results of default and configured settings of three geostatistical algorithms (Simple Kriging, Ordinary Kriging, and Empirical Bayesian) and developed a performance index. In order to interpolate SPM data from the summer season 2010/2011 at PC, the best performance was obtained with Empirical Bayesian Kriging (Standard mean = -0.001 and Root mean square standardized = 0.995). It showed an excellent performance (Performance Index = 0.004) improving both evaluation parameters when radio and neighbourhood were configured. About 69% of the models showed improved standard means when configured compared to the default settings following a here proposed guideline.
    Repository Name: EPIC Alfred Wegener Institut
    Type: Article , isiRev , info:eu-repo/semantics/article
    Format: application/pdf
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  • 6
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    Tracking of marine predators to protect Southern Ocean ecosystems (2020)
    In:  EPIC3Nature, 580(7801), pp. 87-92, ISSN: 0028-0836
    Details
    Publication Date: 2020-04-12
    Description: Southern Ocean ecosystems are under pressure from resource exploitation and climate change. Mitigation requires the identification and protection of Areas of Ecological Significance (AESs), which have so far not been determined at the ocean-basin scale. Here, using assemblage-level tracking of marine predators, we identify AESs for this globally important region and assess current threats and protection levels. Integration of more than 4,000 tracks from 17 bird and mammal species reveals AESs around sub- Antarctic islands in the Atlantic and Indian Oceans and over the Antarctic continental shelf. Fishing pressure is disproportionately concentrated inside AESs, and climate change over the next century is predicted to impose pressure on these areas, particularly around the Antarctic continent. At present, 7.1% of the ocean south of 40°S is under formal protection, including 29% of the total AESs. The establishment and regular revision of networks of protection that encompass AESs are needed to provide long-term mitigation of growing pressures on Southern Ocean ecosystems.
    Repository Name: EPIC Alfred Wegener Institut
    Type: Article , isiRev
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  • 7
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    Benthic organic carbon flux and oxygen penetration reflect different plankton provinces in the Southern Ocean (2009)
    In:  EPIC3Deep-Sea Research Part I 56, pp., pp. 1319-1335
    Details
    Publication Date: 2019-07-16
    Description: For the investigation of organic carbon fluxes reaching the seafloor, oxygen microprofiles were measured at 145 sites in different sub-regions of the Southern Ocean. At 11 sites, an in situ oxygen microprofiler was deployed for the measurement of oxygen profiles and the calculation of organic carbon fluxes. At four sites, both in situ and ex situ data were determined for high latitudes. Based on this data set as well as on previous published data, a relationship was established for the estimation of fluxes derived by ex situ measured O2 profiles. The fluxes of labile organic matter range from 0.5 to 37.1 mg C m−2 d−1. The high values determined by in situ measurements were observed in the Polar Front region (water depth of more than 4290 m) and are comparable to organic matter fluxes observed for high-productivity, upwelling areas like off West Africa. The oxygen penetration depth, which reflects the long-term organic matter flux to the sediment, was correlated with assemblages of key diatom species. In the Scotia Sea (not, vert, similar3000 m water depth), oxygen penetration depths of less than 15 cm were observed, indicating high benthic organic carbon fluxes. In contrast, the oxic zone extends down to several decimeters in abyssal sediments of the Weddell Sea and the southeastern South Atlantic. The regional pattern of organic carbon fluxes derived from microsensor data suggests that episodic and seasonal sedimentation pulses are important for the carbon supply to the seafloor of the deep Southern Ocean.
    Repository Name: EPIC Alfred Wegener Institut
    Type: Article , isiRev
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  • 8
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    GIS based identification of chemoautotrophic communities, mud flows, and biogeochemical habitats at Håkon Mosby Mud Volcano. (2008)
    In:  EPIC3GEOHAB, Marine Geological and Biological Habitat Mapping, Deep Benthic Habitats and High Seas Marine Protected Areas. Ninth International Symposium, 29 April 2 May, 2008, Sitka, Alaska, USA.
    Details
    Publication Date: 2019-07-17
    Description: Marine mud volcanoes are significant source locations contributing to the marine methane cycle. Enhanced heat flow, unique chemoautotrophic communities, occurrence of massive gas hydrates and large gas plumes are direct evidences of elevated methane concentrations and the dynamic environment of mud volcanoes. Related to the high concentrations and large inventories of CH4 in surface sediments only a fraction of the methane is exported to the bottom water. This is mainly due to chemoautotrophic communities oxidizing methane and proving a microbial filter reducing CH4 fluxes. Although these processes were studied for several mud volcanoes still little is known about the spatial pattern and the areas covered by chemoautotrophic communities or by present mud flows.For this purposes the Håkon Mosby Mud Volcano (HMMV), which is located at the continental slope of the Barents Sea, was studied by several dives with the Remotely Operated Vehicle Victor6000. During these dives a high resolution microbathymetric map, with a footprint of 25 x 25 cm and a vertical resolution of better than 10 cm was derived. Furthermore, video streams of the bottom camera was converted into georeferenced mosaics, providing a detailed image about the spatial distribution of seafloor features as bacterial mats, pogonophorans, both indicating methane oxidation, or mud flows. Based on visual inspection of 2310 georeferenced mosaics covering an area of 46160 m², different biogeochemical habitats were identified and quantified on a m²-basis and stored within a geodatabase. By application of GIS based and geostatistical techniques as indicator kriging the distribution of different biogeochemical habitats were quantified and mapped for the entire HMMV.Considering the flat and hummocky area of HMMV, approximately 16% of the flat centre is nearly void of any benthic communities. This area is considered as a region of high methane discharge into bottom water. An area of 5% located in the south-eastern part, is densely inhabited by Beggiatoa. The hummocky outer part is colonised dominantly by pogonophoran tube worms (37.3%) and only occasional by Beggiatoa. Source locations and drainage directions for current mud flows were identified by computation of trend surfaces and consideration of temperature data.
    Repository Name: EPIC Alfred Wegener Institut
    Type: Conference , notRev
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  • 9
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    GIS - more than digital maps. Compilation, visualisation and spatial anlaylsis of marine geodata of the North Sea. (2008)
    In:  EPIC3Leibniz Institute for Baltic Sea Research Warnemünde. 22 May 2008.
    Details
    Publication Date: 2019-07-17
    Repository Name: EPIC Alfred Wegener Institut
    Type: Conference , notRev
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  • 10
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    Relationships between benthic organic carbon flux, oxygen penetration, and plankton provinces in the Southern Ocean (2008)
    In:  EPIC3ASLO Ocean Science Meeting, Orlando, Florida, USA.-07. March 2008., 02
    Details
    Publication Date: 2019-07-16
    Repository Name: EPIC Alfred Wegener Institut
    Type: Conference , notRev
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