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  • 1995-1999  (30)
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  • 1
    Call number: AWI G3-99-0175 ; AWI G3-11-0026
    Description / Table of Contents: The Arctic is considered to be one of the most sensitive environmental elements on Earth, which may respond rapidly to climate change. However, our knowledge of the present and past processes of the Arctic system is still relatively sparse. Based on a multidisciplinary approach, German and Russian scientists describe in this book the natural processes behind short- and long-term changes in the Laptev Sea and its hinterland (Arctic Siberia), using modern climate data and paleorecords which were collected over the past 6 years. These marine and terrestrial datasets provide important new insights into the causes, impacts, and feedback mechanisms of this extreme environment.
    Type of Medium: Monograph available for loan
    Pages: XI, 711 S. , Ill., graph. Darst., Kt.
    ISBN: 3540656766
    Language: English
    Note: Table of Contents: SECTION A: MODERN OCEAN AND SEA-ICE PROCESSES. - Features of Seasonal and Interannual Variability of the Sea Level and Water Circulation in the Laptev Sea / V. K. Pavlov and P. V. Pavlov. - Numerical Modelling of Storm Surges in the Laptev Sea Based on the Finite Element Method / I. Ashik and A. Novakov. - Large-Scale Variations of Sea Level in the Laptev Sea / G. N. Voinov and E. A. Zakharchuk. - Extreme Oscillations of the Sea Level in the Laptev Sea / I. Ashik, Y. Dvorkin and Y. Vanda. - Internal Waves in the Laptev Sea / E. A. Zakharchuk. - The Composition of the Coarse Fraction of Aerosols in the Marine Boundary Layer over the Laptev, Kara and Barents Seas / V. P. Shevchenko, A. P. Lisitzin, R. Stein, V. V. Serova, A. B. Isaeva and N. V. Politova. - New Data on Sea-Ice Albedo in the Laptev and Barents Seas / B. V. Ivanov. - Possible Causes of Radioactive Contamination in the Laptev Sea / V. K. Pavlov, V. V. Stanovoy and A. I. Nikitin. - Oceanographic Causes for Transarctic Ice Transport of River Discharge / I. Dmitrenko, P. Golovin, V. Gribanov and H. Kassens. - Step-Like Vertical Structure Formation Due to Turbulent Mixing of Initially Continuous Density Gradients / A. Zatsepin, S. Dikarev, S. Poyarkov, N. Sheremet, I. Dmitrenko, P. Golovin and H. Kassens. - Dissolved and Paniculate Major and Trace Elements in Newly Formed Ice from the Laptev Sea (Transdrift III, October 1995) / J. A. Hölemann, M. Schirmacher and A. Prange. - Particle Entrainment into Newly Forming Sea Ice - Freeze-Up Studies in October 1995 / F. Lindemann, J. A. Holemann, A. Korablev and A. Zachek. - Frazil Ice Formation during the Spring Flood and its Role in Transport of Sediments to the Ice Cover / P. Golovin, I. Dmitrenko, H. Kassens and J. A. Hölemann. - SECTION B: THE MARINE ECOSYSTEM. - Pelagic-Benthic Coupling in the Laptev Sea Affected by Ice Cover / C. Grahl, A. Boetius and E.-M. Nöthig. - Chlorophyll a Distribution in Water Column and Sea Ice during the Laptev Sea Freeze-Up Study in Autumn 1995 / K. v. Juterzenka and K. Knickmeier. - Composition, Abundance and Population Structure of Spring-Time Zooplankton in the Shelf-Zone of Laptev Sea / E. N. Abramova. - Macrobenthos Distribution in the Laptev Sea in Relation to Hydrology / V. V. Petryashov, B. I. Sirenko, A. A. Golikov, A. V. Novozhilov, E. Rachor, D. Piepenburg and M. K. Schmid. - Carepoctus solidus sp.n., a New Species of Liparid Fish (Scorpaeniformes, Liparidae) from the Lower Bathyal of the Polar Basin / N. V. Chernova. - Spring Stopover of Birds on the Laptev Sea Polynya / D. V. Solovieva. - SECTION C: LAND-OCEAN INTERACTIONS AND PATHWAYS. - Major, Trace and Rare Earth Element Geochemistry of Suspended Particulate Material of East Siberian Rivers Draining to the Arctic Ocean / V. Rachold. - Carbon Isotope Composition of Particulate Organic Material in East Siberian Rivers / V. Rachold and H.-W. Hubberten. - Distribution of River Water and Suspended Sediment Loads in the Deltas of Rivers in the Basins of The Laptev and East-Siberian Seas / V. V. Ivanov and A. A. Piskun. - Dissolved Oxygen, Silicon, Phosphorous and Suspended Matter Concentrations During the Spring Breakup of The Lena River / S. V. Pivovarov, J. A. Hölemann, H. Kassens, M. Antonow and I. Dmitrenko. - Distribution Patterns of Heavy Minerals in Siberian Rivers, the Laptev Sea and the eastern Arctic Ocean: An Approach to Identify Sources, Transport and Pathways of Terrigenous Matter / M. Behrends, E. Hoops and B. Peregovich. - The Role of Coastal Retreat for Sedimentation in the Laptev Sea / F. E. Are. - SECTION D: TERRESTRIAL ENVIRONMENT - PAST AND PRESENT. - Seasonal Changes in Hydrology, Energy Balance and Chemistry in the Active Layers of Arctic Tundra Soils in Taymyr Peninsula, Russia / J. Boike and P. P. Overduin. - The Landscape and Geobotanical Characteristics of the Levinson-Lessing Lake Basin, Byrranga Mountains, Central Taimyr / M. A. Anisimov and I. N. Pospelov. - Studies of Methane Production and Emission in Relation to the Microrelief of a Polygonal Tundra in Northern Siberia / V. A. Samarkin, A. Gundelwein and E.-M. Pfeiffer. - Carbon Dioxide and Methane Emmissions at Arctic Tundra Sites in North Siberia / M. Sommerkom, A. Gundelwein, E.-M. Pfeiffer and M. Bolter. - The Features of the Hydrological Regime of the Lake-River Systems of the Byrranga Mountains (by the Example of the Levinson-Lessing Lake) / V. P. Zimichev, D. Yu. Bolschyanov, V. G. Mesheryakov and D. Gintz. - Lead-210 Dating and Heavy Metal Concentration in Recent Sediments of Lama Lake (Norilsk Area, Siberia) / B. Hagedorn, S. Harwart, M. M. R. van der Loeff and M. Melles. - Late Weichselian to Holocene Diatom Succession in a Sediment Core from Lama Lake, Siberia and Presumed Ecological Implications / U. Kienel. - Climate and Vegetation History of the Taymyr Peninsula since Middle Weichselian Time - Palynological Evidence from Lake Sediments / J. Hahne and M. Melles. - Laminated Sediments from Levinson-Lessing Lake, Northern Central Siberia - A 30,000 Year Record of Environmental History? / T. Ebel, M. Melles and F. Niessen. - High-Resolution Seismic Stratigraphy of Lake Sediments on the Taymyr Peninsula, Central Siberia / F. Niessen, T. Ebel, C. Kopsch and G. B. Fedorov. - Archaeological Survey in Central Taymyr / V. V. Pitul'ko. - Marine Pleistocene Deposits of the Taymyr Peninsula and their Age from ESR Dating / D. Bolshiyanov and A. Molodkov. - Paleoclimatic Indicators from Permafrost Sequences in the Eastern Taymyr Lowland / C. Siegert, A. Yu. Derevyagin, G.N. Shilova, W.-D. Hermichen and A. Hiller. - SECTION E: MARINE DEPOSITIONAL ENVIRONMENT - PAST AND PRESENT. - Stable Oxygen Isotope Ratios in Benthic Carbonate Shells of Ostracoda, Foraminifera, and Bivalvia from Surface Sediments of the Laptev Sea, Summer 1993 and 1994 / H. Erlenkeuser and U. von Grafenstein. - Determination of Depositional Beryllium-10 Fluxes in the Area of the Laptev Sea and Beryllium-10 Concentrations in Water Samples of High Northern Latitudes / C. Strobl, V. Schulz, S. Vogler, S. Baumann, H. Kassens, P. W. Kubik, M. Suter and A. Mangini. - Spatial Distribution of Diatom Surface Sediment Assemblages on the Laptev Sea Shelf (Russian Arctic) / H. Cremer. - Diatoms from Surface Sediments of the Saint Anna Trough (Kara Sea) / R. N. Djinoridze, G. I. Ivanov, E. N. Djinoridze, and R. F. Spielhagen. - Distribution of Aquatic Palynomorphs in Surface Sediments from the Laptev Sea, Eastern Arctic Ocean / M. Kunz-Pirrung. - Distribution of Pollen and Spores in Surface Sediments of the Laptev Sea / O. D. Naidina and H. A. Bauch. - Clay Mineral Distribution in Surface Sediments of the Laptev Sea: Indicator for Sediment Provinces, Dynamics and Sources / B. T. Rossak, H. Kassens, H. Lange and J. Thiede. - Planktic Foraminifera in Holocene Sediments from the Laptev Sea and the Central Arctic Ocean: Species Distribution and Paleobiogeographical Implication / H. A. Bauch. - Holocene Diatom Stratigraphy and Paleoceanography of the Eurasian Arctic Seas / Y. Polyakova. - Late Quaternary Organic Carbon and Biomarker Records from the Laptev Sea Continental Margin (Arctic Ocean): Implications for Organic Carbon Flux and Composition / R. Stein, K. Fahl, F. Niessen and M. Siebold. - Late Pleistocene Paleoriver Channels on the Laptev Sea Shelf - Implications from Sub-Bottom Profiling / H. P. Kleiber and F. Niessen. - Main Structural Elements of Eastern Russian Arctic Continental Margin Derived from Satellite Gravity and Multichannel Seismic Reflection Data / S. S. Drachev, G. L. Johnson, S. W. Laxon, D. C. McAdoo and H. Kassens. - High Resolution Seismic Studies in the Laptev Sea Shelf: First Results and Future Needs / B. Kim, G. Grikurov and V. Soloviev. - SECTION F: SUMMARY. - Dynamics and History of the Laptev Sea and its Continental Hinterland: A Summary / J. Thiede, L. Timokhov, H. A. Bauch, D. Bolshiyanov, I. Dmitrenko
    Location: AWI Reading room
    Location: AWI Reading room
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  • 2
    Publication Date: 1997-01-01
    Print ISSN: 0277-3791
    Electronic ISSN: 1873-457X
    Topics: Geography , Geosciences
    Published by Elsevier
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  • 3
    Publication Date: 1996-11-01
    Description: Climatic reconstruction of glacial to interglacial episodes from oxygen isotopes in sediment cores from the Nordic seas is complicated by strong local meltwater contributions to the oxygen isotope changes. Combination of benthic and planktic foraminiferal isotope data with foraminiferal abundances and ice-rafted debris (IRD) allows separation of local and global effects and subdivision of the marine oxygen isotope events 6.2–5.4, which include the last interglaciation, into: (1) a meltwater phase after glacial stage 6, recorded by large amounts of IRD and low foraminiferal abundance, indicating surface water warming; (2) an IRD-free period with high deposition rates of subpolar foraminifera and other CaCO3 pelagic components, recognized here as the “full” interglaciation; and (3) a phase with the recurrence of IRD and the demise of subpolar species. Comparison of ice-core records and marine data implies that the global climate during the last full interglaciation and that during the postdeglacial Holocene were similar. The records show no significantly different variations in the proxy data. In contrast, the oxygen isotopes of planktic foraminifera and ice cores indicate significant differences during each of the deglacial transitions (Terminations I and II) that preceded these two interglaciations. These suggest that during Termination II the climatic evolution in the Nordic seas was less affected by abrupt changes in ocean–atmosphere circulation than during the last glacial to interglacial transition.
    Print ISSN: 0033-5894
    Electronic ISSN: 1096-0287
    Topics: Geography , Geosciences
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  • 4
  • 5
    Publication Date: 1999-03-01
    Print ISSN: 0300-9483
    Electronic ISSN: 1502-3885
    Topics: Geography , Geosciences
    Published by Wiley
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  • 6
    Publication Date: 1996-04-01
    Print ISSN: 0025-3227
    Electronic ISSN: 1872-6151
    Topics: Geosciences
    Published by Elsevier
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  • 7
    Publication Date: 1999-03-01
    Print ISSN: 0300-9483
    Electronic ISSN: 1502-3885
    Topics: Geography , Geosciences
    Published by Wiley
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  • 8
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    Springer
    In:  In: Land-Ocean Systems in the Siberian Arctic : Dynamica and History. , ed. by Kassens, H., Bauch, H. A., Dmitrenko, I. A. and Eicken, H. Springer, Berlin (u.a.), pp. 693-711. ISBN 3-540-65676-6
    Publication Date: 2015-03-31
    Description: Russian and German scientists have investigated the extreme environmental system in and around the Laptev Sea in the Siberian Arctic. For the first time a major comprehensive research program combining the efforts of several projects addressed both oceanic and terrestrial processes, and their consequences for marine and terrestrial biota, landscape evolution as well as land-ocean interactions. The primary scientific goal of the multidisciplinary program was to decipher past climate variations and their impact on contemporary environmental changes. Extensive studies of the atmosphere, sea ice, water column, and sea-floor on the Laptev Sea Shelf, as well as of the vegetation, soil development, carbon cycle, permafrost behaviour and lake hydrology, and sedimentationon Taymyr Peninsula and Severnaya Zemlya Archipelago were performed during the past years under a framework of joint research activities. They included land and marine expeditions during spring (melting), summer (ice free), and autumn (freezing) seasons. The close bilateral cooperation between many institutions in Russia and Germany succeeded in drawing a picture of important processes shaping the marine and terrestrial environment in northern Central Siberia in Late Quaternary time. The success of the projects, which ended in late 1997, resulted in the definition and establishment of a new major research effort which will concentrate on establishing a better understanding of the paleoclimatic and paleoenvironmental record of the area. This is important because it allows to be able to judge rates and extremes of potential future environmental changes.
    Type: Book chapter , NonPeerReviewed
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  • 9
    Publication Date: 2019-09-23
    Description: The holocene depositional setting of the Laptev Sea was studied using three marine sediment cores from water depths between 77 and 46 m. Based on sedimentary parameters (TOC content, delta(13)C(org) Sedimentation rates) controlled by radiocarbon age models the palaeoenvironment of a strongly coupled river-shelf system was reconstructed since similar to 11 ka SP. Caused by a transgressing sea after the last glaciation, all cores reveal progressive decreases in sedimentation rates. Using the sedimentary records of a core from the Khatanga-Anabar river channel in the western Laptev Sea, several phases of change are recognized: (1) an early period lasted until similar to 10 ka BP characterized by an increased deposition of plant debris due to shelf erosion and fluvial runoff; (2) a transitional phase with consistently increasing marine conditions until 6 ka BP, which was marked at its beginning near 10 ka BP by the first occurrence of marine bivalves, high TOC content and an increase in delta(13)C(org); (3) a time of extremely slow deposition of sediments, commencing at,6 ka BP and interpreted as Holocene sea-level highstand, which caused a southward retreat of the depositional centres within the now submerged river channels on the shelf; (4) a final phase with the establishment of modern conditions after similar to 2 ka BP.
    Type: Article , PeerReviewed
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  • 10
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    Elsevier
    In:  Marine Geology, 131 (1-2). pp. 89-102.
    Publication Date: 2017-06-23
    Description: Microfaunal studies of planktic foraminifera carried out on 21 sediment cores from the Norwegian-Greenland Sea (NGS) reveal the spatial and lateral distribution as well as meltwater implication of today's non-polar/subpolar species Beella megastoma (Earland). Previous findings are verified in that this foraminifera is characteristic only of the deglaciation phases of Termination II, III, and VI and not the ensuing interglacial optima, thus, rendering this species a ‘meltwater’ indicator. Its distribution is restricted to cores from the central, i.e., more ‘pelagic’, part of the NGS covering an area as far north as 77 ° latitude. A detailed investigation of Termination II indicates that B. megastoma first appeared in the southwest of the NGS at ~131 ka and then about 6 kyr later in the eastern and northern parts of the NGS. For the entire duration B. megastoma always coincided with the deposition of distinct ice-rafted detritus (IRD) suggesting the presence of drifting icebergs during this period. Two different oceanographic models, each with a two-stepped evolution of the post-Saalian surface water circulation, are proposed to account for this time transgressive character. The mechanism of brine formation as possible oceanic phenomenon forcing Atlantic water northwards is suggested for being responsible for the occurrence of B. megastoma in the NGS during early Termination II. The presence of B. megastoma always ceased with the culmination of the interglacial optimum, oxygen isotopic Substage 5.51 (Eemian), when the subpolar foraminiferal fauna reached highest abundances and a general lack of IRD is observed.
    Type: Article , PeerReviewed
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