World Library  


Add to Book Shelf
Flag as Inappropriate
Email this Book

Tidal Variability of the Motion in the Strait of Otranto : Volume 10, Issue 1 (13/02/2014)

By Ursella, L.

Click here to view

Book Id: WPLBN0004020202
Format Type: PDF Article :
File Size: Pages 19
Reproduction Date: 2015

Title: Tidal Variability of the Motion in the Strait of Otranto : Volume 10, Issue 1 (13/02/2014)  
Author: Ursella, L.
Volume: Vol. 10, Issue 1
Language: English
Subject: Science, Ocean, Science
Collections: Periodicals: Journal and Magazine Collection (Contemporary), Copernicus GmbH
Historic
Publication Date:
2014
Publisher: Copernicus Gmbh, Göttingen, Germany
Member Page: Copernicus Publications

Citation

APA MLA Chicago

Kovačević, V., Gačić, M., & Ursella, L. (2014). Tidal Variability of the Motion in the Strait of Otranto : Volume 10, Issue 1 (13/02/2014). Retrieved from http://worldlibrary.net/


Description
Description: Istituto Nazionale di Oceanografia e di Geofisica Sperimentale (OGS), B.go Grotta Gigante 42/c, 34010 Sgonico (TS), Italy. Various current data, collected in the Strait of Otranto during the period 1994–2007, have been analysed with the aim of describing the characteristics of the tidal motions and their contribution to the total flow variance. The principal tidal constituents in the area were the semi-diurnal (M2) and the diurnal (K1), with the latter one predominant. The total flow was, in general, more energetic along the flanks than in the middle of the strait. Specifically, it was most energetic over the western shelf and in the upper layer along the eastern flank. In spite of the generally low velocities (a few cm s−1) of the principal tidal constituents, the tidal variance has a pattern similar to that of the total flow variance, that is, it was large over the western shelf and low in the middle. The proportion of non-tidal (comprising the inertial and sub-inertial low-frequency bands) to tidal flow variances was quite variable in both time and space. The low-frequency motions dominated over the tidal and inertial ones in the eastern portion of the strait during the major part of the year, particularly in the upper and intermediate layers. In the deep, near-bottom layer the variance was evenly distributed between the low frequency, diurnal and semi-diurnal bands. An exception was observed near the western shelf break during the summer season when the contribution of the tidal signal to the total variance reached 77%. This high contribution was mainly due to the intensification of the diurnal signal at that location at both upper and bottom current records (velocities of about 10 cm s−1). Local wind and sea level data were analysed and compared with the flow to find the possible origin of this diurnal intensification. Having excluded the sea-breeze impact on the intensification of the diurnal tidal signal, the most likely cause remains the generation of the topographically trapped internal waves and the diurnal resonance in the tidal response. These waves were sometimes generated by the barotropic tidal signal in the presence of summer stratification and the strong bottom slope. This phenomenon may stimulate diapycnal mixing during the stratified season and enhance ventilation of the near-bottom layers.

Summary
Tidal variability of the motion in the Strait of Otranto

Excerpt
Torrence, C. and Webster, P. J.: Interdecadal changes in the ENSO-monsoon System, J. Climate, 12, 2679–2690, 1999.; Baines, P. G.: Internal tides, internal waves and near-inertial motions, in: Baroclinic Processes on Continental Shelves, edited by: Mooers, C. N. K., AGU, Washington, D.C., 19–31, 1986.; Beckenbach, E. and Terrill, E.: Internal tides over abrupt topography in the Southern California Bight: observations of diurnal waves poleward of the critical latitude, J. Geophys. Res., 113, C02001, doi:10.1029/2006JC003905, 2008.; Book, J. W., Martin, P. J., Janeković, I., Kuzmić, M., and Wimbush, M.: Vertical structure of bottom Ekman tidal flows: Observations, theory, and modeling from the northern Adriatic, J. Geophys. Res., 114, C01S06, doi:10.1029/2008JC004736, 2009a.; Book, J. W., Perkins, H., and Wimbush, M.: North Adriatic tides: observations, variational data assimilation modeling, and linear tide dynamics, Geofizika, 26, 115–143, 2009b.; Budillon, G., Grilli, F., Ortona, A., Russo, A., and Tramontin, M.: An assessment of surface dynamics observed offshore Ancona with HF radar, Marine Ecology PSZNI, 23, Supplement I, 21–37, 2002.; Buljan, M. and Zore-Armanda, M.: Oceanographical properties of the Adriatic Sea, Oceanogr. Mar. Biol., 14, 11–98, 1976.; Cerovečki, I., Orlić, M., and Hendershott, M. C.: Adriatic seiche decay and energy loss to the Mediterranean, Deep Sea Res.-Pt. I, 44, 2007–2029, 1997.; Chavanne, C., Janeković, I., Flament, P., Poulain, P.-M., Kuzmić, M., and Gurgel, K.-W.: Tidal currents in the northwestern Adriatic: High Frequency radio observations and numerical model predictions, J. Geophys. Res., 112, C03S21, doi:10.1029/2006JC003523, 2007.; Comune di Venezia: Previsioni delle altezze di marea per il bacino San Marco e delle velocità di corrente per il Canal Porto di Lido – Laguna di Venezia, Valori astronomici 2013, available at: http://93.62.201.235/maree/DOCUMENTI/Previsioni_delle_altezze_di_marea_astronomica_2013.pdf, p. 12, 2013.; Cushman-Roisin, B. and Naimie, C. E.: A 3D finite-element model of the Adriatic tides, J. Mar. Syst., 37, 279–297, 2002.; Kovačević, V., Gačić, M., and Poulain, P.-M.: Eulerian current measurements in the Strait of Otranto and in the Southern Adriatic, J. Mar. Sys., 20, 255–278, 1999.; Cushman-Roisin, B., Malačič, V., and Gačić, M.: Tide, Seiches and Low-frequency oscillations, in: Physical Oceanography of the Adriatic Sea: Past, Present and Future, edited by: Cushman-Roisin, B., Gačić, M., Poulain, P.-M., and Artegiani, A., Kluwer Academic Publishers, Dordrecht/Boston/London, 217–240, 2001.; Ferentinos, G. and Kastanos, N.: Water circulation patterns in the Otranto Strait, eastern Mediterranean, Cont. Shelf Res., 8, 1025–1041, 1988.; Foreman, M. G. G.: Manual for Tidal Currents Analysis and Prediction, Pacific Marine Science Report 78-6, Institute of Ocean Sciences, Patricia Bay, Sidney, B.C., 57 pp. (2004 revision), 1978.; Gačić, M., Kovačević, V., Manca, B., Papageorgiou, E., Poulain, P.-M., Scarazzato, P., and Vetrano, A.: Thermohaline properties and circulation in the Strait of Otranto, in: Dynamics of Mediterranean Straits and Channels, Bull. Inst. Oceanogr., no. spécial 17, CIESM Science Series no. 2, edited by: Briand, F., Monaco, 117–145, 1996.; Guarnieri, A., Pinardi, N., Oddo, P., Bortoluzzi, G., and Ravaioli, M.: Impact of tides in a baroclinic circulation model of the Adriatic Sea, J. Geophys. Res. Oceans, 118, 166–183, doi:10.1029/2012JC007921, 2013.; Hendershott, M. C. and Speranza, A.: Co-oscillating tides in long, narrow bays; the Taylor problem revisited, Deep-Sea Res., 18, 959–980, 1971.

 

Click To View

Additional Books


  • Effects of the 2003 European Heatwave on... (by )
  • Freshwater Components and Transports in ... (by )
  • Spatiotemporal Variations of FCo2 in the... (by )
  • Influence of Winds on Temporally Varying... (by )
  • Secchi Depth in the Oslofjord–skagerrak ... (by )
  • Investigation of Saline Water Intrusions... (by )
  • Laminar and Weakly Turbulent Oceanic Gra... (by )
  • Overturning Cells in the Southern Ocean ... (by )
  • Frequency-dependent Effects of the Atlan... (by )
  • Technical Note: Animal-borne Ctd-satelli... (by )
  • Seawater Capacitance – a Promising Proxy... (by )
  • Transport of Aabw Through the Kane Gap, ... (by )
Scroll Left
Scroll Right

 



Copyright © World Library Foundation. All rights reserved. eBooks from World Library are sponsored by the World Library Foundation,
a 501c(4) Member's Support Non-Profit Organization, and is NOT affiliated with any governmental agency or department.