Tidal currents in the Malta - Sicily Channel from high-frequency radar observations

Fulvio Capodici, Giuseppe Ciraolo, Aldo Drago, Simone Cosoli

Risultato della ricerca: Article

7 Citazioni (Scopus)

Abstract

Two years of sea surface current measurements acquired since August 2012 by High-Frequency SeaSonde radars over the relatively shallow shelf area dividing the Maltese Islands from Sicily (the Malta - Sicily Channel), are used to characterize the surface tidal currents in the region. Tidal currents are generally weak and concentrated in the semidiurnal and diurnal bands, barely exceeding 3cms<sup>-1</sup> in the semidiurnal band (M<inf>2</inf>, S<inf>2</inf>), and below 6cms<sup>-1</sup> in the diurnal band (K<inf>1</inf>, O<inf>1</inf>). In the middle part of the basin, the M<inf>2</inf> currents oscillate along the main Channel axis; on the contrary the S<inf>2</inf> oscillations are oriented along the energetic Atlantic Ionian Stream (AIS) flow. Diurnal tides have a more circular pattern, also following the AIS path and with a significant intensification in proximity of the shelf break, thus suggesting a substantial contribution from internal tides in the region. Phase contours suggest the presence of amphidromic points for both the semidiurnal and diurnal constituents, located in the central area of the Channel for S<inf>2</inf>, O<inf>1</inf> and K<inf>1</inf>, but slightly shifted towards north-west for the M<inf>2</inf> component.
Lingua originaleEnglish
pagine (da-a)10-23
Numero di pagine14
RivistaContinental Shelf Research
Volume109
Stato di pubblicazionePublished - 2015

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Malta
radar
Sicily
tidal current
tides
internal tide
shelf break
streamflow
sea surface
tide
energetics
stream flow
oscillation
basins
basin

All Science Journal Classification (ASJC) codes

  • Oceanography
  • Geology
  • Aquatic Science

Cita questo

Tidal currents in the Malta - Sicily Channel from high-frequency radar observations. / Capodici, Fulvio; Ciraolo, Giuseppe; Drago, Aldo; Cosoli, Simone.

In: Continental Shelf Research, Vol. 109, 2015, pag. 10-23.

Risultato della ricerca: Article

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abstract = "Two years of sea surface current measurements acquired since August 2012 by High-Frequency SeaSonde radars over the relatively shallow shelf area dividing the Maltese Islands from Sicily (the Malta - Sicily Channel), are used to characterize the surface tidal currents in the region. Tidal currents are generally weak and concentrated in the semidiurnal and diurnal bands, barely exceeding 3cms-1 in the semidiurnal band (M2, S2), and below 6cms-1 in the diurnal band (K1, O1). In the middle part of the basin, the M2 currents oscillate along the main Channel axis; on the contrary the S2 oscillations are oriented along the energetic Atlantic Ionian Stream (AIS) flow. Diurnal tides have a more circular pattern, also following the AIS path and with a significant intensification in proximity of the shelf break, thus suggesting a substantial contribution from internal tides in the region. Phase contours suggest the presence of amphidromic points for both the semidiurnal and diurnal constituents, located in the central area of the Channel for S2, O1 and K1, but slightly shifted towards north-west for the M2 component.",
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T1 - Tidal currents in the Malta - Sicily Channel from high-frequency radar observations

AU - Capodici, Fulvio

AU - Ciraolo, Giuseppe

AU - Drago, Aldo

AU - Cosoli, Simone

PY - 2015

Y1 - 2015

N2 - Two years of sea surface current measurements acquired since August 2012 by High-Frequency SeaSonde radars over the relatively shallow shelf area dividing the Maltese Islands from Sicily (the Malta - Sicily Channel), are used to characterize the surface tidal currents in the region. Tidal currents are generally weak and concentrated in the semidiurnal and diurnal bands, barely exceeding 3cms-1 in the semidiurnal band (M2, S2), and below 6cms-1 in the diurnal band (K1, O1). In the middle part of the basin, the M2 currents oscillate along the main Channel axis; on the contrary the S2 oscillations are oriented along the energetic Atlantic Ionian Stream (AIS) flow. Diurnal tides have a more circular pattern, also following the AIS path and with a significant intensification in proximity of the shelf break, thus suggesting a substantial contribution from internal tides in the region. Phase contours suggest the presence of amphidromic points for both the semidiurnal and diurnal constituents, located in the central area of the Channel for S2, O1 and K1, but slightly shifted towards north-west for the M2 component.

AB - Two years of sea surface current measurements acquired since August 2012 by High-Frequency SeaSonde radars over the relatively shallow shelf area dividing the Maltese Islands from Sicily (the Malta - Sicily Channel), are used to characterize the surface tidal currents in the region. Tidal currents are generally weak and concentrated in the semidiurnal and diurnal bands, barely exceeding 3cms-1 in the semidiurnal band (M2, S2), and below 6cms-1 in the diurnal band (K1, O1). In the middle part of the basin, the M2 currents oscillate along the main Channel axis; on the contrary the S2 oscillations are oriented along the energetic Atlantic Ionian Stream (AIS) flow. Diurnal tides have a more circular pattern, also following the AIS path and with a significant intensification in proximity of the shelf break, thus suggesting a substantial contribution from internal tides in the region. Phase contours suggest the presence of amphidromic points for both the semidiurnal and diurnal constituents, located in the central area of the Channel for S2, O1 and K1, but slightly shifted towards north-west for the M2 component.

UR - http://hdl.handle.net/10447/210020

UR - http://www.journals.elsevier.com/continental-shelf-research/

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JF - Continental Shelf Research

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