English   español  
Please use this identifier to cite or link to this item: http://hdl.handle.net/10261/18510
Share/Impact:
Statistics
logo share SHARE logo core CORE   Add this article to your Mendeley library MendeleyBASE

Visualizar otros formatos: MARC | Dublin Core | RDF | ORE | MODS | METS | DIDL
Exportar a otros formatos:

Title

Relative contribution of temperature and salinity to ocean acoustic reflectivity

AuthorsSallarès, Valentí ; Biescas, Berta ; Buffett, Grant ; Carbonell, Ramón ; Dañobeitia, Juan José ; Pelegrí, Josep Lluís
KeywordsSeismic reflectivity
Temperature
Salinity
Issue DateOct-2009
PublisherAmerican Geophysical Union
CitationGeophysical reserach letters 36: L00D06 (2009)
AbstractMarine seismic data display laterally coherent reflectivity from the water column that is attributed to fine-scale oceanic layering. The amplitude of the different reflections is the expression of acoustic impedance contrasts between neighbouring water masses, and therefore water reflectivity maps the ocean's vertical sound speed and density (i.e., temperature and salinity) variations. Here we determine the relative contribution of each parameter by computing the temperature and salinity partial derivatives of sound speed and density, and using them to estimate reflection coefficients from a real oceanographic dataset. The results show that the mean contribution of density variations is 5–10%, while 90–95% is due to sound speed variations. On average, 80% of reflectivity comes from temperature contrasts. Salinity contribution averages 20%, but it is highly variable and reaches up to 40% in regions prone to diffusive convection such as the top of the Mediterranean Undercurrent in the Gulf of Cadiz
Description6 pages, 3 figures
Publisher version (URL)http://dx.doi.org/10.1029/2009GL040187
URIhttp://hdl.handle.net/10261/18510
DOI10.1029/2009GL040187
ISSN0094-8276
E-ISSN1944-8007
Appears in Collections:(ICM) Artículos
(ICTJA) Artículos
(UTM) Artículos
Files in This Item:
File Description SizeFormat 
Sallares_et_al_2009.pdf416,44 kBAdobe PDFThumbnail
View/Open
Show full item record
Review this work
 

Related articles:


WARNING: Items in Digital.CSIC are protected by copyright, with all rights reserved, unless otherwise indicated.