ALBERT

All Library Books, journals and Electronic Records Telegrafenberg

X
feed icon rss

Your email was sent successfully. Check your inbox.

An error occurred while sending the email. Please try again.

Proceed reservation?

Export
Filter
  • English  (3)
Collection
Keywords
Publisher
Language
Years
  • 1
    facet.materialart.
    Unknown
    Walter M. Elsasser to Viktor Hamburger, March 16, 1971 (2014)
    Marine Biological Laboratory (Woods Hole, Mass.) | Arizona Board of Regents
    In:  Viktor Hamburger Papers, Box 1, Folder 24, Marine Biological Laboratory Archives
    Details
    Publication Date: 2023-01-12
    Description: Typewritten letter, 1 page
    Description: Information about biological individuality
    Description: Correspondence
    Keywords: People
    Repository Name: Woods Hole Open Access Server
    Language: English
    Type: Text
    Format: application/pdf
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER (OA)
  • 2
    facet.materialart.
    Unknown
    Internal wave transmission through a density staircase: Interfacial waves excitation (2023)
    In:  XXVIII General Assembly of the International Union of Geodesy and Geophysics (IUGG)
    Details
    Publication Date: 2023-07-04
    Description: Thermohaline staircases (TS) are a prominent feature in the Arctic Ocean basins at mid-depths, where they overlie the warm Atlantic water mass. Internal waves (IW) able to propagate through TS might be more likely to break, enhancing vertical heat fluxes that could bring warm water to the surface. However, only large horizontal waves are likely to propagate since TS act as a filter for IWs. As wind-driven IW activity is expected to increase with the decrease of sea ice cover, it is essential to understand how TS affect IW propagation. We carried out numerical simulations to study IW transmission through a density staircase. The code used solves the two-dimensional nonlinear incompressible Boussinesq Navier-Stokes equation, evolving in time vorticity and buoyancy. The model initiates with a small amplitude vertical wave packet. We performed several simulations with varied relative wavenumbers and varying the step thickness and the step number of the ST. We discovered a novel transmission mechanism in which an incoming IW excites interfacial waves (ITW) within the TS that slowly leak energy above and below the TS. ITWs have a vertical baroclinic structure and travel along the TS. IW transmission theory predicts perfect wave transmission peaks only for IWs and ITWs in resonance. Instead, we found a smooth transition between perfect reflection to perfect transmission. Although we used IWs with short wavelengths in our simulations, long horizontal IWs might also generate ITWs within the TS after the transmission process.
    Language: English
    Type: info:eu-repo/semantics/conferenceObject
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER (OA)
  • 3
    facet.materialart.
    Unknown
    Estimating scale dependent energy fluxes in the meso-to submesoscale-regime in the North Atlantic Ocean using spectral and structure function methods (2023)
    In:  XXVIII General Assembly of the International Union of Geodesy and Geophysics (IUGG)
    Details
    Publication Date: 2023-09-29
    Description: The energy cycle in ocean models is still biased due to the large uncertainty regarding how processes in the mesoscale and submesoscale regimes are represented. Since mesoscale turbulence is largely geostrophic, it features an energy transfer towards larger scales. In contrast, submesoscale turbulence can contain both geostrophic and ageostrophic dynamics which makes the direction of the energy flux less clear. Determining the kinetic energy spectrum of meso- to submesoscale turbulence in the ocean is challenging, since it depends on the horizontal resolution of data sets. Gridded satellite data give a good global overview, but are currently barely Rossby radius resolving. We here estimate the kinetic energy spectral fluxes from SSH data which give the geostrophic part, and compare them to spectral fluxes from a submesoscale permitting ocean model with a high-resolution (500m) focus region in the North Atlantic. The kinetic energy spectral fluxes are found to exhibit both inverse and forward cascades, with a stronger inverse cascade in turbulent areas and maximum inverse wavenumber increasing with latitude. In the model, the amplitude of the inverse cascade is up to five times higher than in the gridded satellite data. In addition to the spectral analysis we use structure functions which are the moments of velocity increments between two points and provide information about the properties of turbulent dynamics at different scales. This diagnostic is more readily obtained from observations, such as surface drifter data, which are globally available and can connect a range of scales from 10m to 1000km.
    Language: English
    Type: info:eu-repo/semantics/conferenceObject
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER (OA)
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...