Numerical issues of the Total Exchange Flow (TEF) analysis framework for quantifying estuarine circulation
<p>For more than a century, estuarine exchange flow has been quantified by means of the Knudsen relations which connect bulk quantities such as inflow and outflow volume fluxes and salinities. These relations are closely linked to estuarine mixing. The recently developed Total Exchange Flow (T...
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doaj-f2e1261295c34a77bb74bcfed55431b92020-11-25T01:48:02ZengCopernicus PublicationsOcean Science1812-07841812-07922019-05-011560161410.5194/os-15-601-2019Numerical issues of the Total Exchange Flow (TEF) analysis framework for quantifying estuarine circulationM. Lorenz0K. Klingbeil1P. MacCready2H. Burchard3Leibniz Institute for Baltic Sea Research Warnemünde, Physical Oceanography and Instumentation, Rostock, GermanyLeibniz Institute for Baltic Sea Research Warnemünde, Physical Oceanography and Instumentation, Rostock, GermanyUniversity of Washington, College of Environment, School of Oceanography, Seattle, WA, USALeibniz Institute for Baltic Sea Research Warnemünde, Physical Oceanography and Instumentation, Rostock, Germany<p>For more than a century, estuarine exchange flow has been quantified by means of the Knudsen relations which connect bulk quantities such as inflow and outflow volume fluxes and salinities. These relations are closely linked to estuarine mixing. The recently developed Total Exchange Flow (TEF) analysis framework, which uses salinity coordinates to calculate these bulk quantities, allows an exact formulation of the Knudsen relations in realistic cases. There are however numerical issues, since the original method does not converge to the TEF bulk values for an increasing number of salinity classes. In the present study, this problem is investigated and the method of dividing salinities, described by <span class="cit" id="xref_text.1"><a href="#bib1.bibx20">MacCready et al.</a> (<a href="#bib1.bibx20">2018</a>)</span>, is mathematically introduced. A challenging yet compact analytical scenario for a well-mixed estuarine exchange flow is investigated for both methods, showing the proper convergence of the dividing salinity method. Furthermore, the dividing salinity method is applied to model results of the Baltic Sea to demonstrate the analysis of realistic exchange flows and exchange flows with more than two layers.</p>https://www.ocean-sci.net/15/601/2019/os-15-601-2019.pdf |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
M. Lorenz K. Klingbeil P. MacCready H. Burchard |
spellingShingle |
M. Lorenz K. Klingbeil P. MacCready H. Burchard Numerical issues of the Total Exchange Flow (TEF) analysis framework for quantifying estuarine circulation Ocean Science |
author_facet |
M. Lorenz K. Klingbeil P. MacCready H. Burchard |
author_sort |
M. Lorenz |
title |
Numerical issues of the Total Exchange Flow (TEF) analysis framework for quantifying estuarine circulation |
title_short |
Numerical issues of the Total Exchange Flow (TEF) analysis framework for quantifying estuarine circulation |
title_full |
Numerical issues of the Total Exchange Flow (TEF) analysis framework for quantifying estuarine circulation |
title_fullStr |
Numerical issues of the Total Exchange Flow (TEF) analysis framework for quantifying estuarine circulation |
title_full_unstemmed |
Numerical issues of the Total Exchange Flow (TEF) analysis framework for quantifying estuarine circulation |
title_sort |
numerical issues of the total exchange flow (tef) analysis framework for quantifying estuarine circulation |
publisher |
Copernicus Publications |
series |
Ocean Science |
issn |
1812-0784 1812-0792 |
publishDate |
2019-05-01 |
description |
<p>For more than a century, estuarine exchange flow has been quantified by means
of the Knudsen relations which connect bulk quantities such as inflow and
outflow volume fluxes and salinities. These relations are closely linked to
estuarine mixing. The recently developed Total Exchange Flow (TEF) analysis framework, which uses
salinity coordinates to calculate these bulk quantities, allows an exact
formulation of the Knudsen relations in realistic cases. There are however
numerical issues, since the original method does not converge to the TEF bulk
values for an increasing number of salinity classes. In the present study,
this problem is investigated and the method of dividing salinities,
described by <span class="cit" id="xref_text.1"><a href="#bib1.bibx20">MacCready et al.</a> (<a href="#bib1.bibx20">2018</a>)</span>, is mathematically introduced. A
challenging yet compact analytical scenario for a well-mixed estuarine
exchange flow is investigated for both methods, showing the proper
convergence of the dividing salinity method. Furthermore, the dividing
salinity method is applied to model results of the Baltic Sea to demonstrate
the analysis of realistic exchange flows and exchange flows with more than
two layers.</p> |
url |
https://www.ocean-sci.net/15/601/2019/os-15-601-2019.pdf |
work_keys_str_mv |
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