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| Titel |
Hydrostatic and non-hydrostatic simulations of the East Greenland Spill Jet |
| VerfasserIn |
M. G. Magaldi, T. W. N. Haine |
| Konferenz |
EGU General Assembly 2012
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 14 (2012) |
| Datensatznummer |
250070809
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| Zusammenfassung |
| The cascade of dense waters off the East Greenland shelf during Summer 2003 is investigated
with two very high-resolution (~0.5 km) regional simulations. The first simulation is
non-hydrostatic. The second simulation is hydrostatic and about 3.75 times less expensive.
Both simulations are compared to a previous 2-km hydrostatic run (about 30 times less
expensive as the 0.5 km non-hydrostatic case).
All runs compare well with observations and confirm the persistence and the causes of the
East Greenland Spill Jet: In some cases, a local perturbation results in dense waters
descending over the shelfbreak into the Irminger Basin (Type I spilling). In other cases,
surface cyclones associated with Denmark Strait Overflow deep domes initiate the spilling
process (Type II spilling).
Differences among runs are quantified in terms of the surface energy spectra and the
Okubo-Weiss parameter. These diagnostics are sensitive to the change in resolution and
dynamics among the runs. The volume transports of Denmark Strait Overflow Water and the
Spill Jet are insensitive to these configuration differences, however. |
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