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  • 1
    Monographie ausleihbar
    Monographie ausleihbar
    Nonlinear climate dynamics (2013)
    Cambridge [u.a.] : Cambridge University Press
    Details Verfügbarkeit
    Signatur: PIK N 456-14-0216 ; PIK N 456-20-23673
    Beschreibung / Inhaltsverzeichnis: Contents: 1. Climate variability ; 2. Deterministic dynamical systems ; 3. Introduction to stochastic calculus ; 4. Stochastic dynamical systems ; 5. Analysing data from stochastic dynamical systems ; 6. The climate modeling hierarchy ; 7. The North Atlantic Oscillation ; 8. El Niño variability ; 9. Multidecadal variability ; 10. Dansgaard-Oeschger events ; 11. The Pleistocene ice ages ; 12. Predictability
    Materialart: Monographie ausleihbar
    Seiten: XII, 357 S. : Ill., graph. Darst., Kt.
    Ausgabe: 1. publ.
    ISBN: 9780521879170
    Standort: A 18 - Bitte bestellen
    Standort: A 18 - Bitte bestellen
    Zweigbibliothek: PIK Bibliothek
    Zweigbibliothek: PIK Bibliothek
    Standort Signatur Erwartet Verfügbarkeit
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  • 2
    Monographie ausleihbar
    Monographie ausleihbar
    Nonlinear physical oceanography : A dynamical systems approach to the large scale ocean circulation and El Niño (2000)
    Dordrecht [u.a.] : Kluwer
    Dazugehörige Bände
    Details Verfügbarkeit
    Signatur: PIK N 456-04-0027
    In: Atmospheric and oceanographic sciences library
    Materialart: Monographie ausleihbar
    Seiten: XVIII, 456 S.
    ISBN: 0792365224
    Serie: Atmospheric and oceanographic sciences library 22
    Standort: A 18 - Bitte bestellen
    Zweigbibliothek: PIK Bibliothek
    Standort Signatur Erwartet Verfügbarkeit
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  • 3
    Monographie ausleihbar
    Monographie ausleihbar
    Dynamical oceanography (2008)
    Berlin [u.a.] : Springer
    Details Verfügbarkeit
    Signatur: 13/M 09.0215
    Beschreibung / Inhaltsverzeichnis: Contents: 1. First Impression.- 2. Present Ocean Circulation.- 3. Mathematical Description.- 4. Vorticity.- 5. Wind-Driven Circulation.- 6. Western Intensification.- 7. Free Waves.- 8. Stratificaton.- 9. Adjustment.- 10. Stability of Zonal Flows.- 11. Equatorial Ocean Circulation, 12. Dynamics of ENSO.- 13. Thermocline Problem.- 14. Antarctic Circumpolar Current.- 15. Arctic Ocean Circulation.- 16. Thermohaline Circulation.
    Materialart: Monographie ausleihbar
    Seiten: XV, 407 S. , Ill., graph. Darst.
    ISBN: 3540763759 , 978-3-540-76375-8
    Klassifikation:
    Ozeanographie
    Standort: Lesesaal
    Zweigbibliothek: GFZ Bibliothek
    Standort Signatur Erwartet Verfügbarkeit
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  • 4
    Digitale Medien
    Digitale Medien
    FLUID DYNAMICS OF El NINO VARIABILITY (2002)
    Palo Alto, Calif. : Annual Reviews
    Annual Review of Fluid Mechanics 34 (2002), S. 531-558 
    Details
    ISSN: 0066-4189
    Quelle: Annual Reviews Electronic Back Volume Collection 1932-2001ff
    Thema: Maschinenbau , Physik
    Notizen: Abstract The El Nino variability in the equatorial Tropical Pacific is characterized by sea-surface temperature anomalies and associated changes in the atmospheric circulation. Through an enormous monitoring effort over the last decades, the relevant time scales and spatial patterns are fairly well documented. In the meantime, a hierarchy of models has been developed to understand the physics of this phenomenon and to make predictions of future variability. In this review, the robust and relevant details of the observations, the fluid mechanical "building blocks," the theory of the deterministic part of the variability, and the impact of small-scale ("noise") and remote ("external") processes are evaluated.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1146/annurev.fluid.34.090501.144936
    Standort Signatur Erwartet Verfügbarkeit
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  • 5
    Digitale Medien
    Digitale Medien
    The coupling of interfacial instabilities and the stabilization of two-layer annular flows (1992)
    New York, NY : American Institute of Physics (AIP)
    Physics of Fluids 4 (1992), S. 1915-1928 
    Details
    ISSN: 1089-7666
    Quelle: AIP Digital Archive
    Thema: Physik
    Notizen: In this paper the stability of annular pressure-driven parallel flows of two liquids sandwiching a free cylindrical interface is considered. For small to moderate Reynolds numbers, the interface is susceptible to capillary and interfacial wave instabilities, the latter instability caused by a jump in viscosity at the interface. It is shown that favorable velocity profiles in both liquids may stabilize capillary breakup of the interface and suppress the axisymmetric interfacial wave instability. A long-wave analysis leads to the physical mechanism responsible for stabilization of capillary breakup. This physical mechanism is a generalization of that by which capillary breakup is stabilized by interfacial shear in an annular film of a single liquid. Stabilization of intermediate wavelengths is studied with a mechanical energy analysis, which leads to a description of the energetic processes at work.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1063/1.858514
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  • 6
    Digitale Medien
    Digitale Medien
    The structure of (linearly) stable double diffusive flow patterns in a laterally heated stratified liquid (1995)
    [S.l.] : American Institute of Physics (AIP)
    Physics of Fluids 7 (1995), S. 680-682 
    Details
    ISSN: 1089-7666
    Quelle: AIP Digital Archive
    Thema: Physik
    Notizen: Layered double diffusive flow patterns in a laterally heated stably stratified liquid are considered in a configuration which allows for steady states to exist. For the heat/salt system, these flows are characterized by the thermal and solutal Rayleigh numbers RaT and RaS, or equivalently by RaT and the buoyancy ratio Rρ. The bifurcation structure of steady patterns with respect to RaT is computed for two cases: fixed RaS and fixed Rρ. For the first case, results in N. Tsitverblit and E. Kit [Phys. Fluids A 5, 1062 (1993)], are computed and extended, and it is shown that many of the previously found flow patterns are unstable; only in a small interval of RaT, multiple (linearly) stable steady states exist. For the second case, the physical relevance of the unstable steady states with respect to the evolution of the flow toward a stable steady state is demonstrated. © 1995 American Institute of Physics.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1063/1.868590
    Standort Signatur Erwartet Verfügbarkeit
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  • 7
    Digitale Medien
    Digitale Medien
    Erratum: "The coupling of interfacial instabilities and the stabilization of two-layer annular flows'' [Phys. Fluids A 4, 1915 (1992)] (1993)
    New York, NY : American Institute of Physics (AIP)
    Physics of Fluids 5 (1993), S. 1517-1517 
    Details
    ISSN: 1089-7666
    Quelle: AIP Digital Archive
    Thema: Physik
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1063/1.858898
    Standort Signatur Erwartet Verfügbarkeit
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  • 8
    Digitale Medien
    Digitale Medien
    Sideband instabilities of mixed barotropic/baroclinic waves growing on a midlatitude zonal jet (1997)
    [S.l.] : American Institute of Physics (AIP)
    Physics of Fluids 9 (1997), S. 615-631 
    Details
    ISSN: 1089-7666
    Quelle: AIP Digital Archive
    Thema: Physik
    Notizen: The instability of an arbitrarily shaped zonal jet on a midlatitude β-plane is considered within a two-layer quasi-geostrophic model with O(1) linear friction. Depending on the horizontal and vertical shear of the jet, it is susceptible to both barotropic and baroclinic instabilities. The linear stability boundaries are determined numerically for a parameter regime relevant to the Gulfstream. The weakly nonlinear (finite amplitude) evolution of the instabilities is shown to be governed by a Ginzburg-Landau equation and for arbitrary jet shapes the coefficients in this equation are computed numerically. The finite amplitude state is shown to become unstable to Benjamin-Feir sideband instabilities. The mixed baroclinic/barotropic character of the primary instability is crucial to this sideband instability which is shown to lead to complicated spatio-temporal behavior of the jet. © 1997 American Institute of Physics.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1063/1.869221
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  • 9
    facet.materialart.
    Unbekannt
    The impact of ocean gateways on ENSO variability in the Miocene (2011)
    In:  Geological Society Special Publication 355: 305-318.
    Details
    Publikationsdatum: 2011-06-27
    Beschreibung: The existence of El Niño/Southern Oscillation (ENSO) variability in past climates is still debated. Based on evidence from geological records indicating a different long-term mean climate in the tropical Pacific, a permanent El Niño state has been hyothesized to exist prior to the Plio-Pleistocene transition. However, model studies of past climate and geological records suggest that ENSO variability has existed on Earth as far back as in the Eocene and the Miocene. In the early-to-middle Miocene, climate was not only warmer than today, but oceanic gateways such as the Indonesian Passage and the Central American Seaway established deep connections between the main ocean basins. Here, we analyse the effect of increased levels of atmospheric greenhouse gases and open tropical gateways on the amplitude, period and pattern of ENSO variability using results of fully coupled climate model simulations. While our model shows only small changes in ENSO variability under increased greenhouse gas levels, it suggests a significantly stronger and less frequent ENSO due to altered oceanic gateways. In particular, a deeper and more open Indonesian Passage does not prevent a Western Pacific warm pool from developing, but it allows the warm pool to shift into the Indian Ocean.
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  • 10
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    Unbekannt
    Modelling the transition to high sediment concentrations as a response to channel deepening in the Ems River Estuary (2019)
    Wiley
    Details
    Publikationsdatum: 2019
    Beschreibung: Abstract Many estuaries are strongly modified by human interventions, including substantive channel deepening. In the Ems River Estuary (Germany, Netherlands), channel deepening between the 1960s and early 2000s coincided with an increase in the maximum near‐bed suspended sediment concentration from moderate (∼ 1 kg/m3) to high (〉 10 kg/m3). In this study the observed transition in the suspended sediment concentration in the Ems is qualitatively reproduced by using an idealized width‐averaged iFlow model. The model is used to reproduce observations from 1965 and 2005 by only changing the channel depth between the years. Model results show an increase in sediment concentrations from approximately 1‐2 kg/m3 to 20‐30 kg/m3 near the bed between 1965 and 2005 if the river discharge is below 70 m3/s, which holds approximately 60% of the time. Thereby this study for the first time provides strong evidence for earlier published hypotheses that channel deepening was the main driver of the increased sediment concentrations in the Ems. The results are explained using two aspects: sediment transport (longitudinal processes) and local re‐suspension (vertical processes). The magnitude of the sediment import increased, because a combination of channel deepening and sediment‐induced damping of turbulence increased the M2‐M4 tidal asymmetry. This effect is particularly strong, because the M4 tide evolved to a state close to resonance. All imported sediment is kept in suspension when it is assumed that re‐suspension is sufficiently efficient, which depends on the value of the erosion parameter used and inclusion of hindered settling in the model.
    Print ISSN: 2169-9275
    Digitale ISSN: 2169-9291
    Thema: Geologie und Paläontologie , Physik
    Publiziert von Wiley im Namen von American Geophysical Union (AGU).
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