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| Titel |
Dynamical analysis of sea-breeze hodograph rotation in Sardinia |
| VerfasserIn |
N. Moisseeva, D. G. Steyn |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1680-7316
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| Digitales Dokument |
URL |
| Erschienen |
In: Atmospheric Chemistry and Physics ; 14, no. 24 ; Nr. 14, no. 24 (2014-12-18), S.13471-13481 |
| Datensatznummer |
250119249
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| Publikation (Nr.) |
 copernicus.org/acp-14-13471-2014.pdf |
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| Zusammenfassung |
| This study investigates the diurnal evolution of sea-breeze (SB) rotation
over an island at the middle latitudes. Earlier research on sea breezes in
Sardinia shows that the onshore winds around various coasts of the island
exhibit both the theoretically predicted clockwise rotation as well as
seemingly anomalous anticlockwise rotation. A non-hydrostatic fully
compressible numerical model (WRF) is used to simulate wind fields on and
around the island on previously studied sea-breeze days, and is shown to
capture the circulation on all coasts accurately. Diurnal rotation of wind is
examined, and patterns of clockwise and anticlockwise rotation are
identified. A dynamical analysis is performed by extracting individual
forcing terms from the horizontal momentum equations. Analysis of several
regions around the island shows that the direction of rotation is a result of
a complex interaction between near-surface and synoptic pressure gradient,
Coriolis and advection forcings. An idealized simulation is performed over an
artificial island with dramatically simplified topography yet similar
dimensions and latitude to Sardinia. Dynamical analysis of the idealized case
reveals a rather different pattern of hodograph rotation to the real
Sardinia, yet similar underlying dynamics. The research provides new insights
into the dynamics underlying sea-breeze hodograph rotation, especially in
coastal zones with a complex topography and/or coastline. |
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