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  • 1990-1994  (1,575,040)
  • 1955-1959  (303,706)
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  • 1
    Monograph available for loan
    Monograph available for loan
    Moskva : Izdatel'stvo Moskovskogo Universiteta
    Call number: AWI G3-96-0439 ; AWI G3-96-0439 (2. Ex.)
    Description / Table of Contents: The book deals with the influence of cryogenesis (a complex process of heating - cooling, freezing - thawing and accompanying phenomena) on earth surface and upper horizons transformation for the late Cenozoic period, and for the present time. The book summarizes the notions of geocryological zonality, altitudinal zonality and "sectorality" in formation of soil thermal regime, frozen strata and taliks distribution, season freezing and thawing, depending on geographical location of the territory and recent natural conditions. The book also gives an analyses of zonal and regional regularities in periglacial processes and phenomena distribution as well as formation of cryogenic composition for different syngenetic, epigenetic and taber soils and epigenetic frozen rocks. The influence of geothermal, geostructural, geomorphological and hydrogeological conditions, glaciation and deglaciation, Arctic seas transgressions and regressions on thickness, and composition of permafrost zone and its interaction with natural gas hydrates is analysed. The book describes major peculiarities of cryolitozone of platforms, mountain areas and Arctic submarine cryolithozone in connection with Pleistocene and Holocene paleogeography. The peculiarities of lithosphere cryogenesis are analysed mainly for northern Eurasia and partly for North America. The book is intended for students and professional geocryologists, engineering geologists, hydrogeologists, geographers and geoecologists as well as geologists dealing with oil and gas, miners, construction workers and those dealing with Northern and Eastern parts of Russia and Northern part of North America.
    Type of Medium: Monograph available for loan
    Pages: 334 Seiten , Illustrationen
    ISBN: 521102379X , 5-211-02379-X
    Language: Russian
    Note: CONTENTS: Introduction. - I. GENERAL INFORMATION ABOUT CRYOGENESIS OF LITHOSPHERE. - I.1. Concept of Lithosphere Cryogenesis and how the book is Structured. - I.2. Development of the Earth Lithosphere Cryogenesis. - I.3. Principle Stages of Development for Recent Permafrost. - II. ZONAL AND REGIONAL REGULARITIES OF SPREADING AND THERMAL REGIME FOR PERMAFROST, TALIKS, SEASONAL FREEZING AND THAWING OF SOILS. - II.l. The Role of Radiation, Climatic and Landscape Factors in the Formation of Thermal Regime for Earth Surface and Soils. - II.2. Causes and Features of Geocryological Latitudinal Zonality and "Sectorality". - II.3. Geocryological Altitudinal Zonality, Its Types and Peculiarities of Manifestation in Connection with Altitude and Geographical Location of Mountain Areas. - II.4. The Influence of Regional Factors on Distibution and Thermal Regime of Permafrost. - II.5. Regularities of Talik Distribution and Existence. - II.6. Principal Regularities of Seasonal Soil Freezing and Thawing. - Ill. ZONAL AND REGIONAL REGULARITIES OF PERIGLACIAL PROCESSES DEVELOPMENT AND SPREADING OF PERIGLACIAL PHENOMENA. - III.l. The Relations Between Periglacial Processes and Phenomena in the System of Cryogenesis. - III.2. Frost Weathering (Zonal and Regional Regularities) Phenomena of Frost Heaving and Its Regional and Zonal Location. - III.3 Regularities of recent spreading of frost heaving. Phenomena of frost heaving and its regional and zonal location. - III.4. Regularities of Frost Cracking and Polygonal-Wedge Structures Formation. - III.5. Spot Medallions and Cryoturbation. - III.6. Solifluction and Solifluction Phenomena. - III.7. Regularities of Kurum Spreading, Composition and Mobility. - III.8. Rock- Glaciers. Regularities of Formation and Distribution. - III.9. Thermocarst Phenomena. Regularities of Formation, Spreading and Mobility. - III.10. Thermoabrasion. Regularities of Spreading and Development. - III.11. Regularities of Icing and Icing Features Formation. - IV. ZONAL AND REGIONAL REGULARITIES OF SYNGENETIC AND EPIGENETIC PERMAFROST STRATA FORMATION. - IV.l. Syngenetic and Epigenetic Permafrost Strata. Their Role in Permafrost Zone Formation. - IV.2. Regional and Zonal Regularities of Syngenetic Perennially Frozen Deposits Formation. - IV.3. Regional and Zonal Regularities of Spreading and Cryogenetic Building of Epigenetic Perennially Frozen Soils. - IV.4. Epigenetic Frozen Rocks and Their Cryogenic Building in Massifs. - IV.5. Taber and Taberlike Deposits. - V. REGIONAL AND ZONAL REGULARITIES OF PERMAFROST BUILDING AND PERMAFROST THICKNESS FORMATION. - V.l. Method of Analysis for Regional and Zonal Features of Permafrost Building and Permafrost Thickness. - V.2. To the Question of Thermal Properties of Soils and Rocks in Massifs. - V.3. Regularities of Influence of Geostructural and Geothermal Conditions on Permafrost Thickness and Permafrost Building. - V.4. Influence of Geomorphology and Topography on Permafrost Thickness and Permafrost Building. - V.5. Influence of Ground Water on Permafrost Distribution, Building and Thickness. - V.6. Gases and Gas Hydrates in Aquasphere and Their Interaction with Permafrost. - V.7. Influence of Arctic Seas Transgression and Regression on Permafrost Building and Thickness. - V.8. Glaciation and Deglaciation. Their Relations and Interaction with Permafrost. - VI. BASIC FEATURES OF CRYGENESIS AND PECULIARITIES OF PLATFORM PERMAFROST. - VI.1. Main Geostructural Features of Platforms. Their influence on Permafrost Conditions. - VI.2. Relief and Late Cepozoic Deposits. Their Influence on Permafrost Conditions. - VI.3. Cryohydrogeological Features of Platforms. - VI.4. Zone of Gas Hydrate Formation of Oil and Gas regions in Permafrost Area. - VI.5. Natural History and Building of Platforms Permafrost. - VII. BASIC FEATURES OF CRYOGENESIS AND PECULIARITIES OF MOUNTAIN AREAS PERMAFROST. - VII.1. Main Geostructural Features of Mountain Areas. Their Influence on Permafrost Conditions. - VII.2. Reliefs and Late Cepozoic Deposits. Their Influence on Permafrost Conditions. - VII.3. Cryohydrogeological Features of Orogenic Areas. - VII.4. Natural History and Features of Mountain Areas Permafrost. - VIII. SUBSEA PERMAFROST OF ARCTIC BASIN. - VIII.1. Types of Offshore Permafrost in Arctic Basin. Hypothesis of Its Formation. - VIII.2. Regularities of Temperature Formation for Near Bottom Water and Deposits in Arctic Basin. - VIII.3. Thickness and Building of Subsea Permafrost. - Conclusion. - References. - Contents. , In kyrillischer Schrift , Inhaltsverzeichnis auch in englischer Sprache
    Location: AWI Reading room
    Location: AWI Reading room
    Branch Library: AWI Library
    Branch Library: AWI Library
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  • 2
    facet.materialart.
    Unknown
    Schweizerbart
    Publication Date: 2024-05-08
    Description: lm Zusammenhang mit den hydrographischen Untersuchungen in der Irminger See, welche im Juni 1955 auf dem Fischerei-Forschungsschiff "Anton Dohrn" ausgeführt wurden und deren Ergebnisse in der vorhergehenden Arbeit: Schichtung und Zirkulation in der Irminger See im Juni 1955 von G. Dietrich (1957) niedergelegt sind, wurden auch Untersuchungen über die Verteilung chemischer Faktoren in den verschiedenen Wassermassen angestellt. Das Gebiet der lrminger See ist gerade in dieser Beziehung von besonderem Interesse, weil, wie wir im einzelnen durch die Untersuchungen von G. Böhnecke, E. Hentschel und H. Wattenberg (1930) und G. Böhnecke, B. Føyn und H. Wattenberg (1931) wissen, hier die verschiedenen Wassermassen der Golfstrom-Ausläufer, des nordatlantischen Wassers und des Ostgrönlandstromes aufeinandertreffen und sich in einer großen Anzahl größerer und kleinerer Wirbel mitinander vermischen. Diese bewirken ihrerseits durch mit ihnen gekoppelten Hebungs- und Senkungsbewegungen eine recht verwickelte Verschiebung der Wassermassen in vertikaler Richtung. Die große Ausdehnung des befahrenen Gebietes im Verlauf der etwa 5 wöchigen Untersuchungsdauer gestattete nur, den chemischen Untersuchungen ein ganz weitmaschiges Stationsnetz zugrunde zu legen. Von den insgesamt durchgeführten 140 hydrographischen Stationen konnten daher nur 50 Stationen mit den vollen Tiefenserien chemisch bearbeitet werden. Bei der Wahl der Stationen wurde so verfahren, daß der Untersuchungsraum einigermaßen gleichmäßig durch Meßpunkte aufgeteilt wurde (Abb . 17). Auf Feinheiten im Chemismus der Wasserkörper mußte daher von vornherein verzichtet werden. Das Hauptgewicht liegt vielmehr auf der großräurnigen Verteilung und dem chemischen Aufbau der verschiedenen Wasserkörper im Untersuchungsgebiet. Untersucht wurden: der Phosphat-Gehalt, der Gehalt an gelöstem Sauerstoff sowie die Fluoreszenz und die optische Trübung in mit dem Wasserschöpfer in verschiedenen Tiefen dem Meere entnommenen Wasserproben. Der Phosphat-Gehalt wurde nach der in der Meereskunde seit langem üblichen kolorimetrischen Methode nach G. Denigès {1920) mittels Ammoniummolybdat-Schwefelsaure und Zinnchlorür (K. Kalle, 1934) an 25 ccm messenden Proben mittels des elektrischen Kolorimeters "Elko II" der Fa. C. Zeiß bestimmt. Zur Sauerstoff-Bestimmung diente die gleichfalls seit langem übliche Winkler'sche Methode an 50 ccm Meerwasserproben (K. Kalle, 1939). Die Fluoreszenzstärke wurde an 1 ccm Meerwasserproben nach der vom Verfasser entwickelten Methode (K. Kalle, 1951) mittels des Zeiß'schen Pulfrichphotometer gemessen, während für die optische Trübung der mit dem Farbfilter "S 72" (720 mμ) an 5 cm dicken Wasserschichten gewonnene Extinktionswert diente. Für diesen Zweck wurde wiederum das "Elko II"-Gerät benutzt, weil die Messung mit diesem Gerat nur 20 ccm Wasser benötigt und die Meßgenauigkeit trotz der verhältnismäßig geringen Schichtdicke extrem genau durchführbar ist (Fehlergröße = ± 0,000 2 E)1). Die Meßwerte für den Phosphat- und den Sauerstoff-Gehalt werden zusammen mit den zugehörigen Temperatur- und Salzgehaltswerten im Bulletin Hydrographique 1955 (Kopenhagen) erscheinen. Die entsprechenden Werte für die Fluoreszenzstärke und die optische Trübung sind in Zahlentafel 1 niedergelegt. An je drei Vertikalschnitten durch das Untersuchungsgebiet (A, B, C) (Abb. 1-12), deren Lage aus Abb. 17 hervorgeht, sowie an je 4 Horizontal-Schnitten in den Tiefen-Niveaus von O m, 200 m, 500 m und 1000 m (Abb. 13-16 und 18-28) soll versucht werden, die Verteilung der chemischen Faktoren im Untersuchungsgebiet in großen Zügen deutlich zu machen.
    Type: Article , PeerReviewed
    Format: text
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  • 3
    Publication Date: 2024-05-06
    Keywords: Area/locality; Heat flow; LATITUDE; LONGITUDE; Method comment
    Type: Dataset
    Format: text/tab-separated-values, 13 data points
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  • 4
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    Selbstverlag Fachbereich Geowissenschaften, FU Berlin
    In:  Herausgeberexemplar
    Publication Date: 2024-05-03
    Description: In der vorliegenden Arbeit werden Untersuchungen zur Verteilung des elektrischen Widerstandes in den südlichen zentralen Anden vorgestellt. Gestützt auf eine breite Datenbasis konnten mit Hilfe von ein- und überwiegend zweidimensionalen Modellierungen für Daten der Magnetotellurik und der Erdmagnetischen Tiefensondierung Modelle zur Verteilung des elektrischen Widerstandes in der andinen Kruste erstellt werden. Sie erlauben qualitative und quantitative Aussagen zur elektrischen Struktur in der Kruste. Im Andensegment von 21° bis 25° S wurden für einzelne Meßpunkte und für fünf mehrere 100 km lange Profile aus Nord-Chile, Süd-Bolivien und Nordwest-Argentinien Leitfähigkeitsmodelle erarbeitet. Elektromagnetische Untersuchnungen werden an einem aktiven Kontinentalrand durch den ’Küsteneffekt’ stark erschwert. Um den Küsteneffekt zu berücksichtigen, wurde der Pazifische Ozean bei einem zweidimensionalen Modell für ein Profil von der Küste bis in die Hochkordillere als ’Randbedingung’ mitmodelliert. Aus drei zweidimensional modellierten W-E-Profilen konnte ein alle morphostrukturellen Einheiten der Anden querendes Gesamtmodell auf der Breite von ca. 21°30’ S abgeleitet werden. Folgende Hauptmerkmale werden im Modell von W nach E beobachtet: • Unterhalb der Küstenkordillere ist der Widerstand mit größer als 3000 ihn relativ hoch. In diesem Bereich wird aber parallel zur Streichrichtung ein guter Leiter in der oberen Kruste gefunden, der lamelliert vorliegen muß. • Der Widerstand der ’normalen’ andinen Kruste ist bis in große Tiefen mit Werten von 50 bis 200 Ωm relativ gering. • Eine große Leitfähigkeitsanomalie liegt unterhalb der Westkordillere in geringer Tiefe. Sie erreicht eine integrierte Leitfähigkeit von ca. 25000 S. • Eine weitere Leitfähigkeitsanomalie mit einer integrierten Leitfähigkeit von ca. 14000 S wird unterhalb des Altiplano in der unteren Kruste beobachtet. Sie steigt von W nach E in die obere Kruste auf, und die integrierte Leitfähigkeit nimmt im westlichen Teil der Ostkordillere deutlich zu. Die Anomalie endet abrupt östlich von La Quiaca (ca. 65°30’ W). Im Ostteil der Ostkordillere wird ein relativ hoher Widerstand (ca. 500 Ωm) von der Oberfläche bis in große Tiefen beobachtet. • Das Vorland der Anden ist durch eine gut leitende Bedeckung charakterisiert. Der Widerstand der Lithosphäre nimmt von W nach E auf mehr als 3000 Ωm zu. Als Ursache der erhöhten elektrischen Leitfähigkeit werden für den guten Leiter unter der Küstenkordillere Kluftsysteme angesehen, in denen das in der subduzierten Platte vorhandene freie Wasser aufsteigt. Der extrem gute Leiter unter der Westkordillere kann im Einklang mit seismischen und gravimetrischen Untersuchungen als partiell geschmolzene Kruste interpretiert werden. Die Leitfähigkeitsanomalie unterhalb des Altiplano und der westlichen Ostkordillere könnte hingegen teilweise durch massive Vererzungen aber auch durch tektonische Ursachen begründet sein, wie z.B. tiefreichende Auf- und Abschiebungshorizonte, in denen Fluide vorhanden sind.
    Description: The purpose of the present work is the research regarding the distribution of the electrical resistivity in the southern part of Central Andes. Supported by a considerable database and with the aid of one- and two-dimensional modelling tools developed for magnetotelurics and deep geomagnetical sounding, several models of the distribution of the electrical resistivity in the Andean crust were developed. They allow qualitative and quantitative insights related to the electrical structure within it. In the Andean segment between 21° and 25° S, several isolated measure stations and five regional profiles each of several 100 km length were processed to establish conductivity models for northern Chile, southern Bolivia and northwestern Argentina. Within this research work the ’coast effect’ at an active plate margin has to be taken into account and for this purpose, the Pacific Ocean was included as a boundary condition in a 2D model extending from the Pacific up to the High Andes. Based on three 2D modelled E-W oriented profiles, a greater model could be derived that involves all the present morphostructural units at a latitude of 21° 30’ S. These models showed mainly that: • below the Coastal Cordillera, the resistivity ranging within 3000 Ωm is comparatively high. Nevertheless, in this region a strike-parallel oriented conductor in the upper crust could be identified, which has to be lamellated. • down to great depths the resistivity of the ’normal’ Andean crust is relatively small, having values of 50 to 200 Ωm. • beneath the Western Cordillera, a shallow conductivity anomaly reaches total conductance of about 25000 S. • another conductivity anomaly with a total conductance of ca. 14000 S has been identified in the lower crust below the Altiplano. This anomaly reaches shallower levels to the east, and in the western part of the Eastern Cordillera, the total conductance increases. Eastwards of La Quiaca (ca. 65° 30’ W) the anomaly terminates abruptly. In the eastern part of the Eastern Cordillera a relatively high resistivity from the surface down to great depths was observed. • the Andean foreland shows a cover with good conductivity values. Beneath, the resistivity increases downward up to more than 3000 ßm from W to E. As a cause of the increased conductivity beneath the Coastal Cordillera, joint systems could account for the uprise of free water generated during the subduction of the Nazca plate. The extremely good conductor below the Western Cordillera can be interpreted together with gravity and seismic evidences as a partial melted crust. Besides, the conductivity anomaly beneath the Altiplano and the western Eastern Cordillera can be explained partly through the existence of ore deposits but also in terms of thrust tectonics, where the detachment zones are characterized by the presence of fluids.
    Description: thesis
    Description: DFG, SUB Göttingen
    Keywords: ddc:550 ; Geophysik ; Magnetotellurik ; Geomagnetismus
    Language: German
    Type: doc-type:book
    Format: 102
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  • 5
    facet.materialart.
    Unknown
    In:  Cahiers du Centre Européen de Géodynamique et de Séismologie ; 7
    Publication Date: 2024-05-03
    Keywords: 550 - Earth sciences
    Type: info:eu-repo/semantics/book
    Format: application/pdf
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  • 6
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    Unknown
    Selbstverlag Fachbereich Geowissenschaften, FU Berlin
    In:  Herausgeberexemplar
    Publication Date: 2024-05-02
    Description: Für die dreidimensionale Konstruktion und Visualisierung gestörter geologischer Schichtverbände wurde ein Systemverbund zur graphisch-interaktiven 3D-Flächenmodellierung auf der Basis geologischer Profildaten geschaffen. Die Verifizierung des Systems erfolgte anhand der Konstruktion eines 3D-Flächenmodells der Erftscholle (Niederrheinische Bucht). Zunächst wird die geologische Entwicklung und die heutige Situation des Untersuchungsgebietes beschrieben. Es werden auf die verwendete Datenbasis, bestehend aus Profilen, Bohrungen und Tiefenlinienpläne sowie die Interpretation, Aufarbeitung, Erfassung und Verwaltung der Daten eingegangen. Es schließt sich die Erläuterung des Systemverbundes an, der unter einer programmierbaren Anwenderoberfläche sowohl kommerzielle als auch freie Software vereinigt. Dieses anwendungsspezifisch gestaltbare System vereinigt Funktionen des Datenbankmanagements, der Visualisierung und der interaktiven 3D-Flächenkonstruktion auf CAD-Basis miteinander. Der offene modulare Aufbau des Systemverbundes ermöglicht die Anpassung an die spezifischen geologischen Anforderungen und die aktuellen Aufgabenstellungen. Dabei erlaubt die Interaktivität bei der Konstruktion und Visualisierung das Einbringen von Fachkenntnissen und Zusatzwissen in den Modellierungsprozess sowie eine gezielte Analyse komplexer 3D-Sachverhalte. Methodische Grundlagen der angewendeten Flächenkonstruktion auf der Basis irregulärer Dreiecksvermaschungen werden erläutert, und auf unterschiedliche Ansätze der Triangulierung eingegangen. Die Approximation natürlicher Flächen geschieht dabei durch ebene polygonale Facetten. Aufbauend auf diesen Grundlagen erfolgt die 3D-Flächenkonstruktion ausgewählter Schicht- und Störungsflächen aus dem Bereich der Erftscholle. Die einzelnen Arbeitsgänge von der Datenselektion über die Konstruktion bis zur Analyse des Flächenverbandes werden besprochen, um sowohl die gewählten Konstruktionsansätze, als auch die Funktionalität des Systemverbundes zu beschreiben.
    Description: A soft and hardware system was combined for construction and visualisation of faulted geological strata units. Based on geological cross-sections, the system enables the graphical interactive 3D-surface modeling. By constructing the 3D-layermodel of the Erftblock (Lower Rhine Basin, Germany) the system was verified. First a description of the geological evolution and the present situation of the exploration area is provided. In addition the used data will be explained. This consists of cross-sections, wells, isopleth maps as well as the interpretation, processing, recording and management of the data. Then follows an illustration of the system. It joins commercial and free software under a programable user interface, which allows an optimisation of this tool depending on the necessary applications. The system unifies functions of database management, 3D-visualisation and interactive 3D-construction based on CAD-methods. The open and modular design of the system enables the adaption to specific geological requirements and current tasks. In particular, the interaction in terms of construction and visualisation allows the insertion of expert knowledge and additional facts into the modeling process. It also provides the possibility for exact analysis of complex 3D-objects. Methodical elements of the used construction process that are based on irregular triangulation will be explained. References to diferent approaches of triangulation will be revealed. In this work the approximation of natural surfaces is realized by means of flat and polygonal facets. This method form the base of the 3D-construction of the Erftblock, by which certain selected fault- and strata-boundaries are considered. To describe the function of the system and the approach for construction the singel steps of modeling will be pointed out. The process of modeling consists of data selection, construction, and finaly the analysis of the 3D-surface arrangement.
    Description: thesis
    Description: DFG, SUB Göttingen
    Keywords: ddc:550 ; Dreidimensionale geometrische Modellierung ; Geophysik
    Language: German
    Type: doc-type:book
    Format: 124
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  • 7
    facet.materialart.
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    PANGAEA
    In:  Supplement to: Broecker, Wallace S; Klas, Mieczyslawa; Clark, Elizabeth; Bonani, Georges; Ivy, Susan; Wolfli, Willy (1991): The influence of CaCO3 dissolution on core top radiocarbon ages for deep-sea sediments. Paleoceanography, 6(5), 593-608, https://doi.org/10.1029/91PA01768
    Publication Date: 2024-05-02
    Description: Radiocarbon ages on CaCO3 from deep-sea cores offer constraints on the nature of the CaCO3 dissolution process. The idea is that the toll taken by dissolution on grains within the core top bioturbation zone should be in proportion to their time of residence in this zone. If so, dissolution would shift the mass distribution in favor of younger grains, thereby reducing the mean radiocarbon age for the grain ensemble. We have searched in vain for evidence supporting the existence of such an age reduction. Instead, we find that for water depths of more than 4 km in the tropical Pacific the radiocarbon age increases with the extent of dissolution. We can find no satisfactory steady state explanation and are forced to conclude that this increase must be the result of chemical erosion. The idea is that during the Holocene the rate of dissolution of CaCO3 has exceeded the rain rate of CaCO3. In this circumstance, bioturbation exhumes CaCO3 from the underlying glacial sediment and mixes it with CaCO3 raining from the sea surface.
    Keywords: A150/180; A180-74; Age, 14C conventional; Age, dated; also published as VM28-122; Amerasian Basin; ARK-III/3; Atlantic Ocean; BC; Box corer; Calculated; CEPAG; CH182-36; CH73-013; CH7X; DEPTH, sediment/rock; Eastern Equatorial Pacific; Elevation of event; EN06601; EN066-21GGC; EN066-24PG; EN066-29GGC; EN066-32GGC; EN066-34PG; EN066-39GGC; EN066-45PG; EN066-47PG; EN066-51PG; Endeavor; ERDC; ERDC-077BX; ERDC-079BX; ERDC-083BX; ERDC-092BX; ERDC-108BX; ERDC-112BX; ERDC-120BX; ERDC-123BX; ERDC-125BX; ERDC-128BX; ERDC-129BX; ERDC-131BX; ERDC-135BX; ERDC-136BX; ERDC-139BX; ERDC-141BX; Event label; FA-527-3; FL-124; Fram Strait; GC; Giant box corer; GIK21295-4 PS07/586; GKG; Gravity corer; INMD; INMD-097BX; INMD-101BX; INMD-104BX; INMD-109BX; INMD-110BX; INMD-111BX; INMD-113BX; INMD-115BX; Jean Charcot; Lamont-Doherty Earth Observatory, Columbia University; Latitude of event; LDEO; Le Suroît; Longitude of event; Melville; North Atlantic; PC; Piston corer; PLDS-066BX; PLDS-068BX; PLDS-070BX; PLDS-072BX; PLDS-074BX; PLDS-077BX; PLDS-079BX; PLDS-081BX; PLDS-083BX; PLDS-085BX; PLDS-089BX; PLDS-090BX; PLDS-092BX; PLDS-107BX; PLDS-3; Pleiades; Polarstern; PS07; PS1295-4; Quaternary Environment of the Eurasian North; QUEEN; RC13; RC13-189; RC24; RC24-1; RC24-7; Reference/source; Robert Conrad; Sampling/drilling ice; Sedimentation rate; SU81-14; SU81-18; T-3; Thomas G. Thompson (1964); Thomas Washington; TR163-31; TT154-10; TT154-5; TTXXX; V19; V19-188; V23; V23-81; V25; V25-56; V28; V28-122; V28-238; V30; V30-40; V30-41; V30-51; V32; V32-8; V33/4-14; V33-88; V35; V35-5; Vema
    Type: Dataset
    Format: text/tab-separated-values, 219 data points
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  • 8
    facet.materialart.
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    PANGAEA
    In:  Supplement to: Rea, David K; Pisias, Nicklas G; Newberry, T (1991): Late Pleistocene paleoclimatology of the central equatorial Pacific: flux patterns of biogenic sediments. Paleoceanography, 6(2), 227-244, https://doi.org/10.1029/90PA02542
    Publication Date: 2024-05-02
    Description: High-resolution records of the concentration and mass accumulation rate (MAR, or flux) of biogenic sediments from core RC11-210 in the central equatorial Pacific are compared for the entire late Pleistocene. The fluxes of calcium carbonate and organic carbon correlate well. The opal flux pattern shows no direct correlation with the other two; rather, opal flux maxima correlate with slopes of (i.e. both precede and follow) the organic carbon and carbonate MAR peaks. Organic carbon and calcite therefore may both be better indicators of past productivity than opal, which is an indicator of transition at this location. We interpret the sequence low biogenic fluxes, high opal fluxes, high carbonate, carbon, and opal fluxes as representing the transition from low to high sea surface biological productivity. The phase relationships for eccentricity of the biogenic sedimentation records were compared to those of other climatic indications including the oxygen isotope record of ice volume, the ice core CO2 record, the Pacific delta13C record, the deep nutrient (Cd/Ca) record, and the eolian grain-size record of wind intensity. We find that starting from maximum ice volume (phase angle of 0°) the phase relationships of the 100,000-year periodicity show, in the first quadrant, maximum wind intensity (30°) and maximum calcite and carbon flux (45°) occurring first, followed by maximum opal flux (75°) and then maximum deep nutrients (95°). Minimum Pacific delta13C occurs at a phase angle of 155°, the maximum CO2 in the Vostok record and minimum ice volume is at 180°. Thus, in the eccentricity climate cycle, glacial conditions lead to stronger wind-driven circulation which enhances productivity which in turn results in enhanced oceanic and atmospheric carbon dioxide and minimum ice volume.
    Keywords: Accumulation rate, calcium carbonate; Accumulation rate, opal; Accumulation rate, total organic carbon; AGE; Calcium carbonate; Calculated; Carbon, organic, total; Density, dry bulk; DEPTH, sediment/rock; Lamont-Doherty Earth Observatory, Columbia University; LDEO; Opal, biogenic silica; Opal, extraktion (DeMaster & Cochran, 1982); PC; Piston corer; RC11; RC1112; RC11-210; Robert Conrad; Sedimentation rate
    Type: Dataset
    Format: text/tab-separated-values, 1392 data points
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  • 9
    Publication Date: 2024-05-02
    Keywords: DEPTH, sediment/rock; Lamont-Doherty Earth Observatory, Columbia University; LDEO; PC; Piston corer; RC13; RC13-229; Robert Conrad; Uvigerina sp., δ13C; Uvigerina sp., δ18O
    Type: Dataset
    Format: text/tab-separated-values, 388 data points
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  • 10
    Publication Date: 2024-05-02
    Keywords: 85-572C; AGE; Calcium carbonate; DEPTH, sediment/rock; DRILL; Drilling/drill rig; Glomar Challenger; Lamont-Doherty Earth Observatory, Columbia University; LDEO; Leg85; North Pacific
    Type: Dataset
    Format: text/tab-separated-values, 568 data points
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  • 11
    Publication Date: 2024-05-02
    Keywords: 85-572A; AGE; Calcium carbonate; DEPTH, sediment/rock; DRILL; Drilling/drill rig; Glomar Challenger; Lamont-Doherty Earth Observatory, Columbia University; LDEO; Leg85; North Pacific
    Type: Dataset
    Format: text/tab-separated-values, 22 data points
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  • 12
    Publication Date: 2024-05-02
    Keywords: 85-574; AGE; Calcium carbonate; DEPTH, sediment/rock; DRILL; Drilling/drill rig; Glomar Challenger; Lamont-Doherty Earth Observatory, Columbia University; LDEO; Leg85; North Pacific/TROUGH
    Type: Dataset
    Format: text/tab-separated-values, 128 data points
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  • 13
    Publication Date: 2024-05-02
    Keywords: Age model; Age model, Martinson et al (1987); DEPTH, sediment/rock; Lamont-Doherty Earth Observatory, Columbia University; LDEO; PC; Piston corer; V28; V28-127; Vema
    Type: Dataset
    Format: text/tab-separated-values, 14 data points
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  • 14
    Publication Date: 2024-05-02
    Keywords: AGE; Calcium carbonate; DEPTH, sediment/rock; Lamont-Doherty Earth Observatory, Columbia University; LDEO; PC; Piston corer; RC11; RC1112; RC11-209; Robert Conrad
    Type: Dataset
    Format: text/tab-separated-values, 153 data points
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  • 15
    Publication Date: 2024-05-02
    Keywords: AGE; Calcium carbonate; DEPTH, sediment/rock; Lamont-Doherty Earth Observatory, Columbia University; LDEO; PC; Piston corer; RC11; RC1112; RC11-210; Robert Conrad
    Type: Dataset
    Format: text/tab-separated-values, 258 data points
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  • 16
    Publication Date: 2024-05-02
    Keywords: AGE; Calcium carbonate; DEPTH, sediment/rock; Lamont-Doherty Earth Observatory, Columbia University; LDEO; PC; Piston corer; RC12; RC12-63; Robert Conrad
    Type: Dataset
    Format: text/tab-separated-values, 68 data points
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  • 17
    Publication Date: 2024-05-02
    Keywords: AGE; Calcium carbonate; DEPTH, sediment/rock; Lamont-Doherty Earth Observatory, Columbia University; LDEO; PC; Piston corer; RC12; RC12-65; Robert Conrad
    Type: Dataset
    Format: text/tab-separated-values, 60 data points
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  • 18
    Publication Date: 2024-05-02
    Keywords: AGE; Calcium carbonate; DEPTH, sediment/rock; Lamont-Doherty Earth Observatory, Columbia University; LDEO; PC; Piston corer; RC12; RC12-66; Robert Conrad
    Type: Dataset
    Format: text/tab-separated-values, 129 data points
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  • 19
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    PANGAEA
    In:  Supplement to: Pisias, Nicklas G; Mix, Alan C; Zahn, Rainer (1990): Nonlinear response in the global climate system: evidence from benthic oxygen isotopic record in core RC13-110. Paleoceanography, 5(2), 147-160, https://doi.org/10.1029/PA005i002p00147
    Publication Date: 2024-05-02
    Description: The Milankovitch theory of climate change predicts that variations of the climate system should match the dominant frequencies of the orbital forcing in the 41 and 23 kyr**-1 frequency bands. Such a linear theory would predict that the amplitude variations of the climate response in these bands should match amplitude variations in orbital forcing. Here we compare amplitude variations of the marine oxygen isotope record with orbital forcing in these bands over the last 700,000 years and find systematic changes through time. We express these amplitude mismatches as variations in the glacial response time, a measure of the climate system's sensitivity to orbitally induced insolation changes. Variations in the glacial response time occur in all frequencies bands without strong concentration of variance in any given band, and have a 'red' spectrum with larger variations at the longer periods. The response time is coherent with delta18O at periods of 100 and 41 kyr, which suggests that the variations in glacial response time in part reflect internal feedback mechanisms of the global climate system. The phase relationship between the estimated glacial response time and the delta18O (ice volume) record is very different at these two frequencies, which suggests at least two separate feedback mechanisms. The first mechanism enhances the 100,000-year climate cycle by increasing rates of change during major glacial terminations. Candidates for this feedback include lithospheric depression and rebound, enhanced ice calving from large marine based ice sheets, and possibly others. A second set of mechanisms, which is detected in the response to the 41,000-year orbital cycle of Earth's obliquity, accelerates ice growth events and slows glacial melting. Some models which include feedbacks between ice sheets, sea ice, and deep ocean temperatures predict early rapid ice growth, followed by slower growth, and this general feature is consistent with our analysis. While we can not at present identify the specific feedbacks leading to asymmetry of growth and decay rates at different frequency bands, the finding of this ice-growth acceleration mechanism in the 41,000-year frequency band suggests that high-latitude processes, where insolation varies most strongly at this rhythm, may be involved. Our finding of systematic changes in climate sensitivity has implications for orbitally tuned chronologies in Pleistocene sediments. Instead of a constant phase shift within a frequency band between orbital forcing and glacial response, as has been assumed in the past, we suggest a variable phase. The largest changes in age estimates for isotopic events are at the glacial terminations, which in our chronology are as much as 3500 years older that estimated previously.
    Keywords: AGE; Cibicides sp., δ18O; DEPTH, sediment/rock; Lamont-Doherty Earth Observatory, Columbia University; LDEO; Mass spectrometer Finnigan MAT 251; PC; Piston corer; RC13; RC13-110; Robert Conrad; Uvigerina sp., δ18O
    Type: Dataset
    Format: text/tab-separated-values, 296 data points
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  • 20
    Publication Date: 2024-05-02
    Keywords: DEPTH, sediment/rock; GC; Gravity corer; Lamont-Doherty Earth Observatory, Columbia University; LDEO; Mass spectrometer Finnigan MAT 251; Pacific; Planulina wuellerstorfi, δ13C; Planulina wuellerstorfi, δ18O; RS78-GC18; Uvigerina sp., δ13C; Uvigerina sp., δ18O
    Type: Dataset
    Format: text/tab-separated-values, 78 data points
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  • 21
    Publication Date: 2024-05-02
    Keywords: AGE; Albatross IV (1963); Calcium carbonate; core_59; DEPTH, sediment/rock; GC; Gravity corer; Lamont-Doherty Earth Observatory, Columbia University; LDEO; NODC-0418; SDSE_090; SwedishDeepSeaExpedition
    Type: Dataset
    Format: text/tab-separated-values, 109 data points
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  • 22
    Publication Date: 2024-05-02
    Keywords: AGE; Albatross IV (1963); Calcium carbonate; core_60; DEPTH, sediment/rock; GC; Gravity corer; Lamont-Doherty Earth Observatory, Columbia University; LDEO; NODC-0418; SDSE_092; SwedishDeepSeaExpedition
    Type: Dataset
    Format: text/tab-separated-values, 110 data points
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  • 23
    Publication Date: 2024-05-02
    Keywords: AGE; Calcium carbonate; DEPTH, sediment/rock; Lamont-Doherty Earth Observatory, Columbia University; LDEO; PC; Piston corer; V24; V24-55; Vema
    Type: Dataset
    Format: text/tab-separated-values, 81 data points
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  • 24
    Publication Date: 2024-05-02
    Keywords: AGE; Calcium carbonate; DEPTH, sediment/rock; GC; Gravity corer; Lamont-Doherty Earth Observatory, Columbia University; LDEO; Pacific Ocean; V24-59
    Type: Dataset
    Format: text/tab-separated-values, 105 data points
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  • 25
    Publication Date: 2024-05-02
    Keywords: AGE; Calcium carbonate; DEPTH, sediment/rock; Lamont-Doherty Earth Observatory, Columbia University; LDEO; PC; Piston corer; V28; V28-179; Vema
    Type: Dataset
    Format: text/tab-separated-values, 209 data points
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  • 26
    Publication Date: 2024-05-02
    Keywords: DEPTH, sediment/rock; Lamont-Doherty Earth Observatory, Columbia University; LDEO; Mass spectrometer VG Isogas 903; PC; Piston corer; Uvigerina peregrina, δ13C; Uvigerina peregrina, δ18O; Uvigerina senticosa, δ13C; Uvigerina senticosa, δ18O; Uvigerina sp., δ13C; Uvigerina sp., δ18O; V32; V32-161; Vema
    Type: Dataset
    Format: text/tab-separated-values, 52 data points
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  • 27
    Publication Date: 2024-05-02
    Keywords: Age, 14C AMS; Age, dated; Depth, bottom/max; DEPTH, sediment/rock; Depth, top/min; Foraminifera, planktic δ13C; Lamont-Doherty Earth Observatory, Columbia University; LDEO; Mass spectrometer Finnigan MAT 251; PC; Piston corer; W8709A; W8709A-13; Wecoma
    Type: Dataset
    Format: text/tab-separated-values, 12 data points
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  • 28
    Publication Date: 2024-05-02
    Keywords: Age, 14C AMS; Age, dated; Depth, bottom/max; DEPTH, sediment/rock; Depth, top/min; Foraminifera, planktic δ13C; Lamont-Doherty Earth Observatory, Columbia University; LDEO; Mass spectrometer Finnigan MAT 251; PC; Piston corer; W8709A; W8709A-8; Wecoma
    Type: Dataset
    Format: text/tab-separated-values, 16 data points
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  • 29
    Publication Date: 2024-05-02
    Keywords: Age, 14C AMS; Age, 14C milieu/reservoir corrected; Age, dated; Age, dated material; Age, dated standard deviation; Depth, bottom/max; DEPTH, sediment/rock; Depth, top/min; Lamont-Doherty Earth Observatory, Columbia University; LDEO; PC; Piston corer; V32; V32-67; Vema
    Type: Dataset
    Format: text/tab-separated-values, 36 data points
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  • 30
    Publication Date: 2024-05-02
    Keywords: Age model; Age model, SPECMAP chronology, Imbrie et al. (1984); Calculated; DEPTH, sediment/rock; Isotopic event; Lamont-Doherty Earth Observatory, Columbia University; LDEO; PC; Piston corer; RC24; RC24-7; Robert Conrad; Sedimentation rate
    Type: Dataset
    Format: text/tab-separated-values, 43 data points
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  • 31
    Publication Date: 2024-05-02
    Keywords: Alnus; Betula; Cyperaceae; DEPTH, sediment/rock; Gramineae; Lamont-Doherty Earth Observatory, Columbia University; LDEO; PC; Picea; Pinus; Piston corer; Quercus; Sphagnum; V32; V32-159; Vema
    Type: Dataset
    Format: text/tab-separated-values, 104 data points
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  • 32
    Publication Date: 2024-05-02
    Keywords: 81-552A; Age model; Age model, Martinson et al (1987); Deep Sea Drilling Project; DEPTH, sediment/rock; DRILL; Drilling/drill rig; DSDP; Glomar Challenger; Lamont-Doherty Earth Observatory, Columbia University; LDEO; Leg81; North Atlantic/PLATEAU
    Type: Dataset
    Format: text/tab-separated-values, 14 data points
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  • 33
    Publication Date: 2024-05-02
    Keywords: AGE; Calcium carbonate; DEPTH, sediment/rock; Lamont-Doherty Earth Observatory, Columbia University; LDEO; Melville; MN76-01, Pleiades; PC; Piston corer; PLDS-130P; PLDS-4
    Type: Dataset
    Format: text/tab-separated-values, 107 data points
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  • 34
    Publication Date: 2024-05-02
    Keywords: DEPTH, sediment/rock; Lamont-Doherty Earth Observatory, Columbia University; LDEO; Mass spectrometer Finnigan MAT 251; TC; Trigger corer; Uvigerina sp., δ13C; Uvigerina sp., δ18O; W8709A; W8709A-8TC; Wecoma
    Type: Dataset
    Format: text/tab-separated-values, 17 data points
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  • 35
    Publication Date: 2024-05-02
    Keywords: AGE; Calcium carbonate; Carbon, organic, total; Density, dry bulk; DEPTH, sediment/rock; Lamont-Doherty Earth Observatory, Columbia University; LDEO; TC; Trigger corer; W8709A; W8709A-13TC; Wecoma
    Type: Dataset
    Format: text/tab-separated-values, 69 data points
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  • 36
    Publication Date: 2024-05-02
    Keywords: AGE; Calcium carbonate; Carbon, organic, total; Density, dry bulk; DEPTH, sediment/rock; Lamont-Doherty Earth Observatory, Columbia University; LDEO; PC; Piston corer; W8709A; W8709A-13; Wecoma
    Type: Dataset
    Format: text/tab-separated-values, 84 data points
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  • 37
    Publication Date: 2024-05-02
    Keywords: AGE; Calcium carbonate; Carbon, organic, total; Density, dry bulk; DEPTH, sediment/rock; Lamont-Doherty Earth Observatory, Columbia University; LDEO; TC; Trigger corer; W8709A; W8709A-8TC; Wecoma
    Type: Dataset
    Format: text/tab-separated-values, 90 data points
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  • 38
    Publication Date: 2024-05-02
    Keywords: AGE; Calcium carbonate; Carbon, organic, total; Density, dry bulk; DEPTH, sediment/rock; Lamont-Doherty Earth Observatory, Columbia University; LDEO; PC; Piston corer; W8709A; W8709A-1; Wecoma
    Type: Dataset
    Format: text/tab-separated-values, 75 data points
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  • 39
    Publication Date: 2024-05-02
    Keywords: DEPTH, sediment/rock; GC; Gravity corer; Lamont-Doherty Earth Observatory, Columbia University; LDEO; Mass spectrometer Finnigan MAT 251; Pacific; Planulina wuellerstorfi, δ13C; Planulina wuellerstorfi, δ18O; RS67-GC16; Uvigerina sp., δ13C; Uvigerina sp., δ18O
    Type: Dataset
    Format: text/tab-separated-values, 42 data points
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  • 40
    Publication Date: 2024-05-02
    Keywords: DEPTH, sediment/rock; GC; Gravity corer; Lamont-Doherty Earth Observatory, Columbia University; LDEO; Mass spectrometer Finnigan MAT 251; Pacific; Planulina wuellerstorfi, δ13C; Planulina wuellerstorfi, δ18O; RS67-GC52; Uvigerina sp., δ13C; Uvigerina sp., δ18O
    Type: Dataset
    Format: text/tab-separated-values, 26 data points
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  • 41
    Publication Date: 2024-05-02
    Keywords: DEPTH, sediment/rock; Lamont-Doherty Earth Observatory, Columbia University; LDEO; Mass spectrometer Finnigan MAT 251; PC; Piston corer; Planulina wuellerstorfi, δ13C; Planulina wuellerstorfi, δ18O; Uvigerina sp., δ13C; Uvigerina sp., δ18O; V18; V18-222; Vema
    Type: Dataset
    Format: text/tab-separated-values, 112 data points
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  • 42
    Publication Date: 2024-05-02
    Keywords: 17SL; DEPTH, sediment/rock; Gravity corer (Kiel type); Lamont-Doherty Earth Observatory, Columbia University; LDEO; Mass spectrometer Finnigan MAT 251; Planulina wuellerstorfi, δ13C; Planulina wuellerstorfi, δ18O; SL; SO36/2; SO36/2_17SL; Sonne; South Tasman Rise; Uvigerina sp., δ13C; Uvigerina sp., δ18O
    Type: Dataset
    Format: text/tab-separated-values, 104 data points
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  • 43
    Publication Date: 2024-05-02
    Keywords: DEPTH, sediment/rock; Lamont-Doherty Earth Observatory, Columbia University; LDEO; Mass spectrometer Finnigan MAT 251; PC; Piston corer; Uvigerina sp., δ13C; Uvigerina sp., δ18O; W8709A; W8709A-8; Wecoma
    Type: Dataset
    Format: text/tab-separated-values, 102 data points
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  • 44
    Publication Date: 2024-05-02
    Keywords: Age, 14C AMS; Age, 14C milieu/reservoir corrected; Age, dated; Age, dated material; Age, dated standard deviation; Depth, bottom/max; DEPTH, sediment/rock; Depth, top/min; Lamont-Doherty Earth Observatory, Columbia University; LDEO; PC; Piston corer; RC16; RC16-55; Robert Conrad
    Type: Dataset
    Format: text/tab-separated-values, 72 data points
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  • 45
    Publication Date: 2024-05-02
    Keywords: AGE; Calcium carbonate; Carbon, organic, total; Density, dry bulk; DEPTH, sediment/rock; Lamont-Doherty Earth Observatory, Columbia University; LDEO; PC; Piston corer; W8709A; W8709A-8; Wecoma
    Type: Dataset
    Format: text/tab-separated-values, 120 data points
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  • 46
    Publication Date: 2024-05-02
    Keywords: DEPTH, sediment/rock; GC; Gravity corer; Lamont-Doherty Earth Observatory, Columbia University; LDEO; Mass spectrometer Finnigan MAT 251; Pacific; Planulina wuellerstorfi, δ13C; Planulina wuellerstorfi, δ18O; RS67-GC27
    Type: Dataset
    Format: text/tab-separated-values, 40 data points
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  • 47
    Publication Date: 2024-05-02
    Keywords: DEPTH, sediment/rock; GC; Gravity corer; Lamont-Doherty Earth Observatory, Columbia University; LDEO; Mass spectrometer Finnigan MAT 251; Pacific; Planulina wuellerstorfi, δ13C; Planulina wuellerstorfi, δ18O; RS67-GC3; Uvigerina sp., δ13C; Uvigerina sp., δ18O
    Type: Dataset
    Format: text/tab-separated-values, 98 data points
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  • 48
    Publication Date: 2024-05-02
    Keywords: 7SL; DEPTH, sediment/rock; Gravity corer (Kiel type); Lamont-Doherty Earth Observatory, Columbia University; LDEO; Mass spectrometer Finnigan MAT 251; Planulina wuellerstorfi, δ13C; Planulina wuellerstorfi, δ18O; SL; SO36/2; SO36/2_7SL; Sonne; South Tasman Rise; Uvigerina sp., δ13C; Uvigerina sp., δ18O
    Type: Dataset
    Format: text/tab-separated-values, 93 data points
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  • 49
    Publication Date: 2024-05-02
    Keywords: Age model; Age model, SPECMAP chronology, Imbrie et al. (1984); Calculated; DEPTH, sediment/rock; Isotopic event; Lamont-Doherty Earth Observatory, Columbia University; LDEO; PC; Piston corer; RC16; RC16-66; Robert Conrad; Sedimentation rate
    Type: Dataset
    Format: text/tab-separated-values, 48 data points
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  • 50
    Publication Date: 2024-05-02
    Keywords: Age model; Age model, Martinson et al (1987); CH8X; CHN82-24; DEPTH, sediment/rock; Jean Charcot; Lamont-Doherty Earth Observatory, Columbia University; LDEO; PC; Piston corer
    Type: Dataset
    Format: text/tab-separated-values, 16 data points
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