Zobrazeno 1 - 10
of 23
pro vyhledávání: '"Helmut Z. Baumert"'
Publikováno v:
Ocean Modelling. 20:183-206
Mixing between overflows and ambient water masses is a critical problem of deep-water mass formation in the downwelling branch of the meridional overturning circulation of the ocean. Modeling approaches that have been tested so far rely either on alg
Publikováno v:
Ocean Modelling. 24:122-139
Mixing of overflows released from polar and marginal seas is a key process shaping the structure of the meridional overturning circulation. Ocean general circulation models have difficulty in resolving the overflows, and therefore they must rely on p
Autor:
Helmut Z. Baumert, Hartmut Peters
Publikováno v:
Ocean Modelling. 19:183-203
A simple k–e turbulence closure is introduced which has no stability functions but instead a Richardson number-dependent turbulent Prandtl number. Its free parameters are determined in a comparison with microstructure observations from a stratified
Autor:
Thomas Petzoldt, Karsten Rinke, Susanne Rolinski, Marie König, Helmut Z. Baumert, Jürgen Benndorf
Publikováno v:
WASSERWIRTSCHAFT. 95:28-33
Autor:
Klaus Bigalke, Susanne Rolinski, Jürgen Benndorf, Heidemarie Horn, Thomas Petzoldt, Helmut Z. Baumert
Publikováno v:
WASSERWIRTSCHAFT. 95:34-38
Autor:
Hartmut Peters, Helmut Z. Baumert
Publikováno v:
Journal of Physical Oceanography. 34:505-512
A new simple two-equation turbulence closure is constructed by hypothesizing that there is an extra energy sink in the turbulent kinetic energy (k) equation representing the transfer of energy from k to internal waves and other nonturbulent motions.
Publikováno v:
Coastal Engineering. 41:125-153
The requirements of ‘comprehensive’ or ‘compatible’ observational data sets for developing and verifying models are examined. ‘Compatibility’ over the range of key parameters involves accuracy, spatial and temporal extent, and resolution.
Autor:
Julia P McManus, Hiroshi Yagi, Matthias Regener, Hassan Smaoui, Helmut Z. Baumert, Jürgen Sündermann, Barnabas Szilagy, Georges Chapalain
Publikováno v:
Coastal Engineering. 41:63-93
The role of small-scale processes in models of coastal seas is reviewed, and the respective uses of vertically integrated and vertically resolving models are described. Although applied with heavily tuned empirical parameters to the Holderness coast
Autor:
Helmut Z. Baumert, Hartmut Peters
Publikováno v:
Journal of Geophysical Research: Oceans. 105:6453-6468
For the special hydrodynamic situation of unbounded homogeneous shear layers, turbulence closure models of Mellor-Yamada type (MY) and k-e type are put into a single canonical form. For this situation we show that conventional versions of MY and vari
Autor:
Hans Burchard, Helmut Z. Baumert
Publikováno v:
Journal of Physical Oceanography. 28:309-321
By means of a numerical model of an idealized flat-bottom estuary, the paper studies the hydrodynamic control of the turbidity zone by the combined effect of the salt wedge and tidal movements. The model is of two- dimensional (x, z) finite-differenc