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  • 1
    Keywords: Atlas ; Antarktis ; Antarktis
    Description / Table of Contents: Der britische Polarregionen-Experte und preisgekrönte Kartograf Peter Fretwell gibt einen Einblick in die antarktische Welt. In neun Kapiteln mit 70 komprimierten Artikeln informiert er über die Geografie des antarktischen Kontinents, seine Eislandschaften, die Welt der Pflanzen und Tiere, die bisherigen geografischen und wissenschaftlichen Erkundungen und über vieles Weitere mehr. Dabei weist er immer wieder auf die besondere Bedeutung hin, die der Antarktis für den Klimawandel zukommt. Das Besondere des Buches sind die zu jedem Artikel passenden, zumeist grossformatigen Karten. Sie untermauern und veranschaulichen ganz hervorragend komplexe wissenschaftlichen Erkenntnisse - so wurde vieles, was das Besondere der antarktischen Welt ausmacht, wohl noch nicht präsentiert. Für jeden Laien-Interessierten ausgesprochen informativ, bestens verständlich und sehr beeindruckend; unbedingt auch für Sekundarstufen-II-Schüler empfohlen. (2)
    Type of Medium: Map
    Pages: 1 Atlas (208 Seiten) , Illustrationen, Karten , 31cm
    ISBN: 9783440175309
    Series Statement: Mit Kosmos mehr entdecken - seit 1822
    Uniform Title: Antarctic atlas
    DDC: 910
    RVK:
    Language: German
    Note: Referenzen, Quellen und weiterführende Literatur: Seite 199-201
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  • 2
    Publication Date: 2015-10-27
    Description: On the Antarctic Peninsula, lichens are the most diverse botanical component of the terrestrial ecosystem. However, detailed information on the distribution of lichens on the Antarctic Peninsula region is scarce, and the data available exhibit significant heterogeneity in sampling frequency and effort. Satellite remote sensing, in particular the use of the Normalized Difference Vegetation Index (NDVI), has facilitated determination of vegetation richness and cover distribution in some remote and otherwise inaccessible environments. However, it is known that using NDVI for the detection of vegetation can overlook the presence of lichens even if their land cover is extensive. We tested the use of known spectra of lichens in a matched filtering technique for the detection and mapping of lichen-covered land from remote sensing imagery on the Antarctic Peninsula, using data on lichen presence collected by citizen scientists and other non-specialists as ground truthing. Our results confirm that the use of this approach allows for the detection of lichen flora on the Antarctic Peninsula, showing an improvement over the use of NDVI alone for the mapping of flora in this area. Keywords: Antarctica; NDVI; matched filtering; Landsat; remote sensing. (Published: 26 October 2015) To access the supplementary material for this article, please see supplementary files in the column to the right (under Article Tools). Citation: Polar Research 2015, 34 , 25633, http://dx.doi.org/10.3402/polar.v34.25633
    Print ISSN: 0800-0395
    Electronic ISSN: 1751-8369
    Topics: Geography , Geosciences
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  • 3
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    PANGAEA
    In:  Supplement to: Watcham, Emma P; Bentley, Michael J; Hodgson, Dominic A; Roberts, Stephen J; Fretwell, Peter; Lloyd, Jerry M; Larter, Robert D; Whitehouse, Pippa L; Leng, Melanie J; Monien, Patrick; Moreton, Steven Grahame (2011): A new Holocene relative sea level curve for the South Shetland Islands, Antarctica. Quaternary Science Reviews, 30(21-22), 3152-3170, https://doi.org/10.1016/j.quascirev.2011.07.021
    Publication Date: 2023-11-04
    Description: Precise relative sea level (RSL) data are important for inferring regional ice sheet histories, as well as helping to validate numerical models of ice sheet evolution and glacial isostatic adjustment. Here we develop a new RSL curve for Fildes Peninsula, South Shetland Islands (SSIs), a sub-Antarctic archipelago peripheral to the northern Antarctic Peninsula ice sheet, by integrating sedimentary evidence from isolation basins with geomorphological evidence from raised beaches. This combined approach yields not only a Holocene RSL curve, but also the spatial pattern of how RSL change varied across the archipelago. The curve shows a mid-Holocene RSL highstand on Fildes Peninsula at 15.5 m above mean sea level between 8000 and 7000 cal a BP. Subsequently RSL gradually fell as a consequence of isostatic uplift in response to regional deglaciation. We propose that isostatic uplift occurred at a non-steady rate, with a temporary pause in ice retreat ca. 7200 cal a BP, leading to a short-lived RSL rise of ~1 m and forming a second peak to the mid-Holocene highstand. Two independent approaches were taken to constrain the long-term tectonic uplift rate of the SSIs at 0.22-0.48 m/ka, placing the tectonic contribution to the reconstructed RSL highstand between 1.4 and 2.9 m. Finally, we make comparisons to predictions from three global sea level models.
    Keywords: Age, 14C calibrated, CALIB (Stuiver & Reimer, 1993); Age, 14C milieu/reservoir corrected (Milliken et al., 2009); Age, AMS 14C conventional; Age, dated; Age, dated material; Age, dated standard deviation; Ardley_lake; Belen_lake; Calendar age; Calendar age, maximum/old; Calendar age, minimum/young; Comment of event; Core; CORE; Event label; Fildes Peninsula, King George Island; Gaoshan_lake; Laboratory; Laguna_Tern, Lake_Albatross; Lake_Shanhaicuan; Latitude of event; Long_lake; Longitude of event; Ozero_Dlinnoye; Priority Programme 1158 Antarctic Research with Comparable Investigations in Arctic Sea Ice Areas; Probability; Sample ID; SPP1158; Yanou_lake; Yue_Ya_Hu, Laguna_Ripamonti; δ13C
    Type: Dataset
    Format: text/tab-separated-values, 928 data points
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  • 4
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    PANGAEA
    In:  Supplement to: Leat, Phil T; Fretwell, Peter; Tate, Alexander J; Larter, Robert D; Martin, Tara J; Smellie, John L; Jokat, Wilfried; Bohrmann, Gerhard (2016): Bathymetry and geological setting of the South Sandwich Islands volcanic arc. Antarctic Science, 28(4), 293-303, https://doi.org/10.1017/S0954102016000043
    Publication Date: 2024-01-15
    Description: The South Sandwich Islands and associated seamounts constitute the volcanic arc of an active subduction system situated in the South Atlantic. We introduce a map of the bathymetry and geological setting of the South Sandwich Islands and the associated East Scotia Ridge back-arc spreading centre that consists of two sides: side 1, a regional overview of the volcanic arc, trench and back-arc, and side 2, detailed maps of the individual islands. Side 1 displays the bathymetry at scale 1:750 000 of the intra-oceanic, largely submarine South Sandwich arc, the back-arc system and other tectonic boundaries of the subduction system. Satellite images of the islands on side 2 are at scales of 1:50 000 and 1:25 000 with contours and main volcanological features indicated. These maps are the first detailed topological and bathymetric maps of the area. The islands are entirely volcanic in origin, and most have been volcanically or fumarolically active in historic times. Many of the islands are ice-covered, and the map forms a baseline for future glaciological changes caused by volcanic activities and climate change. The back-arc spreading centre consists of nine segments, most of which have rift-like morphologies.
    Keywords: Campaign; Comment; Device type; Name; Reference/source
    Type: Dataset
    Format: text/tab-separated-values, 279 data points
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  • 5
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    PANGAEA
    In:  Supplement to: Hughes, Kevin A; Fretwell, Peter; Rae, James W B; Holmes, Keith; Fleming, Andrew (2011): Untouched Antarctica: mapping a finite and diminishing environmental resource. Antarctic Science, 23(06), 537-548, https://doi.org/10.1017/S095410201100037X
    Publication Date: 2023-12-13
    Description: Globally, areas categorically known to be free of human visitation are rare, but still exist in Antarctica. Such areas may be among the most pristine locations remaining on Earth and, therefore, be valuable as baselines for future comparisons with localities impacted by human activities, and as sites preserved for scientific research using increasingly sophisticated future technologies. Nevertheless, unvisited areas are becoming increasingly rare as the human footprint expands in Antarctica. Therefore, an understanding of historical and contemporary levels of visitation at locations across Antarctica is essential to a) estimate likely cumulative environmental impact, b) identify regions that may have been impacted by non-native species introductions, and c) inform the future designation of protected areas under the Antarctic Treaty System. Currently, records of Antarctic tourist visits exist, but little detailed information is readily available on the spatial and temporal distribution of national governmental programme activities in Antarctica. Here we describe methods to fulfil this need. Using information within field reports and archive and science databases pertaining to the activities of the United Kingdom as an illustration, we describe the history and trends in its operational footprint in the Antarctic Peninsula since c. 1944. Based on this illustration, we suggest that these methodologies could be applied productively more generally.
    Keywords: Abbreviation; Adelaide_St; Admiralty_Bay_St; Antarctica; Antarctic Peninsula; Anvers_Is_St; Blaiklock_Is_St; Cape_Geddes_St; Cape_Reclus_St; Comment; Damoy_Point_St; Danco_Is_St; Deception_Is_St; Detaille_Is_St; Event label; Faraday_St; Fossil_Bluff_St; Halley_RS; Hope_Bay_St; Horseshoe_Is_St; International Polar Year (2007-2008); IPY; Latitude of event; Livingston_Island_Station; Longitude of event; Number of individuals; Number of years; Orford_Cliff_St; Port_Lockroy_St; Prospect_Point_St; Rasmussen_Hut_St; Research station; Rothera_St; RS; Sandefjord_Bay_St; Signy_RS; Size; Sky_Blu_St; Station label; Status; Stonington_Is_St; View_Point_St
    Type: Dataset
    Format: text/tab-separated-values, 235 data points
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  • 6
    Publication Date: 2024-04-20
    Description: The International Bathymetric Chart of the Southern Ocean Version 2 (IBCSO v2) is a digital bathymetric model (DBM) for the area south of 50° S with special emphasis on the bathymetry of the Southern Ocean. IBCSO v2 has a resolution of 500 m × 500 m in a Polar Stereographic projection (EPSG: 9354). The total data coverage of the seafloor is 23.79% with a multibeam-only data coverage of 22.32%. The remaining 1.47% include singlebeam and other data. IBCSO v2 is the most authoritative seafloor map of the area south of 50°S. IBCSO is a regional mapping project of the General Bathymetric Chart of the Ocean (GEBCO) supported by the Nippon Foundation – GEBCO Seabed 2030 Project. GEBCO is a project under the auspices of the International Hydrographic Organization (IHO) and the Intergovernmental Oceanographic Commission (IOC) with the goal to produce the authoritative map of the world's oceans. The IBCSO Project is also an integral part of the Antarctic research community and an expert group of the Scientific Committee on Antarctic Research (SCAR). For further information about the IBCSO Project, please visit http://www.ibcso.org.
    Keywords: Antarctica; AWI_GeoPhy; Binary Object; Binary Object (File Size); Description; IBCSO_v2_extent; Image; Image (File Size); Marine Geophysics @ AWI; Projection; Seabed2030; The Nippon Foundation - GEBCO Seabed 2030 Project
    Type: Dataset
    Format: text/tab-separated-values, 50 data points
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  • 7
    Publication Date: 2020-12-11
    Description: The Antarctic ice sheet has been losing mass over past decades through the accelerated flow of its glaciers, conditioned by ocean temperature and bed topography. Glaciers retreating along retrograde slopes (that is, the bed elevation drops in the inland direction) are potentially unstable, while subglacial ridges slow down the glacial retreat. Despite major advances in the mapping of subglacial bed topography, significant sectors of Antarctica remain poorly resolved and critical spatial details are missing. Here we present a novel, high-resolution and physically based description of Antarctic bed topography using mass conservation. Our results reveal previously unknown basal features with major implications for glacier response to climate change. For example, glaciers flowing across the Transantarctic Mountains are protected by broad, stabilizing ridges. Conversely, in the marine basin of Wilkes Land, East Antarctica, we find retrograde slopes along Ninnis and Denman glaciers, with stabilizing slopes beneath Moscow University, Totten and Lambert glacier system, despite corrections in bed elevation of up to 1 km for the latter. This transformative description of bed topography redefines the high- and lower-risk sectors for rapid sea level rise from Antarctica; it will also significantly impact model projections of sea level rise from Antarctica in the coming centuries.
    Repository Name: EPIC Alfred Wegener Institut
    Type: Article , isiRev
    Format: application/pdf
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  • 8
    Publication Date: 2019-12-08
    Repository Name: EPIC Alfred Wegener Institut
    Type: Article , peerRev
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  • 9
    Publication Date: 2022-01-25
    Description: Changes in penguin populations on the Antarctic Peninsula have been linked to several environmental factors, but the potentially devastating impact of volcanic activity has not been considered. Here we use detailed biogeochemical analyses to track past penguin colony change over the last 8,500 years on Ardley Island, home to one of the Antarctic Peninsula’s largest breeding populations of gentoo penguins. The first sustained penguin colony was established on Ardley Island c. 6,700 years ago, pre-dating sub-fossil evidence of Peninsula- wide occupation by c. 1,000 years. The colony experienced five population maxima during the Holocene. Overall, we find no consistent relationships with local-regional atmospheric and ocean temperatures or sea-ice conditions, although the colony population maximum, c. 4,000–3,000 years ago, corresponds with regionally elevated temperatures. Instead, at least three of the five phases of penguin colony expansion were abruptly ended by large eruptions from the Deception Island volcano, resulting in near-complete local extinction of the colony, with, on average, 400–800 years required for sustainable recovery.
    Description: https://static-content.springer.com/esm/art%3A10.1038%2Fncomms14914/MediaObjects/41467_2017_BFncomms14914_MOESM3080_ESM.xlsx
    Description: https://static-content.springer.com/esm/art%3A10.1038%2Fncomms14914/MediaObjects/41467_2017_BFncomms14914_MOESM3081_ESM.xlsx
    Description: https://static-content.springer.com/esm/art%3A10.1038%2Fncomms14914/MediaObjects/41467_2017_BFncomms14914_MOESM3082_ESM.xlsx
    Description: https://static-content.springer.com/esm/art%3A10.1038%2Fncomms14914/MediaObjects/41467_2017_BFncomms14914_MOESM3083_ESM.xlsx
    Description: https://static-content.springer.com/esm/art%3A10.1038%2Fncomms14914/MediaObjects/41467_2017_BFncomms14914_MOESM3084_ESM.xlsx
    Description: https://static-content.springer.com/esm/art%3A10.1038%2Fncomms14914/MediaObjects/41467_2017_BFncomms14914_MOESM3085_ESM.xlsx
    Description: https://static-content.springer.com/esm/art%3A10.1038%2Fncomms14914/MediaObjects/41467_2017_BFncomms14914_MOESM3086_ESM.xlsx
    Description: research
    Keywords: Biogeochemistry ; western Antarctic Peninsula ; Penguin population dynamics ; Environmental impact ; Palaeoclimate ; FID-GEO-DE-7
    Language: English
    Type: map
    Format: 16
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  • 10
    Publication Date: 2024-01-11
    Description: One of the key components of this research has been the mapping of Antarctic bed topography and ice thickness parameters that are crucial for modelling ice flow and hence for predicting future ice loss and the ensuing sea level rise. Supported by the Scientific Committee on Antarctic Research (SCAR), the Bedmap3 Action Group aims not only to produce new gridded maps of ice thickness and bed topography for the international scientific community, but also to standardize and make available all the geophysical survey data points used in producing the Bedmap gridded products. Here, we document the survey data used in the latest iteration, Bedmap3, incorporating and adding to all of the datasets previously used for Bedmap1 and Bedmap2, including ice bed, surface and thickness point data from all Antarctic geophysical campaigns since the 1950s. More specifically, we describe the processes used to standardize and make these and future surveys and gridded datasets accessible under the Findable, Accessible, Interoperable, and Reusable (FAIR) data principles. With the goals of making the gridding process reproducible and allowing scientists to re-use the data freely for their own analysis, we introduce the new SCAR Bedmap Data Portal (https://bedmap.scar.org, last access: 1 March 2023) created to provide unprecedented open access to these important datasets through a web-map interface. We believe that this data release will be a valuable asset to Antarctic research and will greatly extend the life cycle of the data held within it. Data are available from the UK Polar Data Centre: https://data.bas.ac.uk (last access: 5 May 2023​​​​​​​). See the Data availability section for the complete list of datasets.
    Description: Published
    Description: 2695–2710
    Description: OSA2: Evoluzione climatica: effetti e loro mitigazione
    Description: JCR Journal
    Repository Name: Istituto Nazionale di Geofisica e Vulcanologia (INGV)
    Type: article
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