SciELO - Scientific Electronic Library Online

 
vol.46 issue2Assemblage of birds in a mussel farm on Chiloé Island, southern ChileSpatial distribution of epiphytes along the thallus of the introduced macroalga, Codium fragile subsp. tomentosoides in the subtidal zone of Caldera author indexsubject indexarticles search
Home Pagealphabetic serial listing  

Services on Demand

Journal

Article

Indicators

Related links

Share


Revista de biología marina y oceanografía

On-line version ISSN 0718-1957

Abstract

RODRIGO, Cristián. Bathymetric interpretation of the Valparaiso area: comments on the paper by HP Vergara & R Astudillo, 'Offshore structural highs of the Valparaiso region, central Chile' . Rev. biol. mar. oceanogr. [online]. 2011, vol.46, n.2, pp.249-255. ISSN 0718-1957.  http://dx.doi.org/10.4067/S0718-19572011000200014.

A submarine alignment at 32º-33ºS offshore within the Valparaiso Region, Chile, is composed by three peaks at 200, 733 and 880 m below sea level, which were identified by Vergara & Astudillo (2008) using a bathymetric public data base. This is composed by bathymetry which is estimated by satellite altimetry, and from ship surveys. However, after modeling recent similar data bases and also processing and modeling available multibeam bathymetry with ~100% of spatial coverage, those highs seem to be absent. The apparent creation of bathymetric artifacts would have been due to the inclusion of bad single beam data of a specific ships sounding track. The hypothesis regarding the origin of the alignment associated with the vertical displacement of a block at the outer shelf, would not be valid.

Keywords : Satellite altimetry; multibeam bathymetry; continental margin; seafloor features.

        · text in Spanish     · Spanish ( pdf )

 

Creative Commons License All the contents of this journal, except where otherwise noted, is licensed under a Creative Commons Attribution License