@article {Kormann2010, title = {{Synthetic modelling of acoustical propagation applied to seismic oceanography experiments}}, journal = {Geophysical Research Letters}, volume = {37}, number = {6}, year = {2010}, month = {mar}, pages = {n/a{\textendash}n/a}, abstract = {Recent work shows that multichannel seismic (MCS) systems provide detailed information on the oceans{\textquoteright} finestructure. The aim of this paper is to analyze if high order numerical algorithms are suitable to accurately model the extremely weak wavefield scattered by the oceans{\textquoteright} finestructures. For this purpose, we generate synthetic shot records along a coincident seismic and oceanographic profile acquired across a Mediterranean salt lens in the Gulf of Cadiz. We apply a 2D finite-difference time-domain propagation model, together with second-order Complex Frequency Shifted Perfectly Matched Layers at the numerical boundaries, using as reference a realistic sound speed map with the lateral resolution of the seismic data. We show that our numerical propagator creates an acoustical image of the ocean finestructures including the salt lens that reproduces with outstanding detail the real acquired one. Copyright {\textcopyright} 2010 by the American Geophysical Union.}, issn = {00948276}, doi = {10.1029/2009GL041763}, url = {http://www.scopus.com/inward/record.url?eid=2-s2.0-77949835265\&partnerID=tZOtx3y1}, author = {Kormann, Jean and Cobo, Pedro and Biescas, Berta and Sallares, Valenti and Papenberg, Cord and Recuero, Manuel and Carbonell, Ram{\'o}n} } @article {Simancas2009, title = {{Tectonic relationships of Southwest Iberia with the allochthons of Northwest Iberia and the Moroccan Variscides}}, journal = {Comptes Rendus Geoscience}, volume = {341}, number = {2-3}, year = {2009}, month = {feb}, pages = {103{\textendash}113}, abstract = {The Iberian Massif poses a problem of relationships between its northwestern and southern parts. Suture terranes (ophiolites and high-pressure rocks) crop out in NW Iberia but only as allochthonous units, unconnected from their root zone. Sutures cropping out in SW Iberia are discussed in order to relate them to the unknown root of the NW Iberia allochthons. On the other hand, the Moroccan Variscides are very briefly presented with a view to propose their correlation with the Iberian zones. Particularly important is the transition from the Variscides to the Paleoproterozoic basement in Morocco, which is a key argument for palaeogeographic reconstructions. {\textcopyright} 2008 Acad{\'e}mie des sciences.}, keywords = {Correlations, Iberia, Morocco, Sutures, Variscan orogen}, issn = {16310713}, doi = {10.1016/j.crte.2008.11.003}, url = {http://www.scopus.com/inward/record.url?eid=2-s2.0-63049089339\&partnerID=tZOtx3y1}, author = {Simancas, Jos{\'e} Fernando and Azor, Antonio and Mart{\'\i}nez-Poyatos, David and Tahiri, Abdelfatah and El Hadi, Hassan and Gonz{\'a}lez-Lodeiro, Francisco and P{\'e}rez-Esta{\'u}n, Andr{\'e}s and Carbonell, Ram{\'o}n} } @article {LoIacono2008a, title = {{Very high-resolution seismo-acoustic imaging of seagrass meadows (Mediterranean Sea): Implications for carbon sink estimates}}, journal = {Geophysical Research Letters}, volume = {35}, number = {18}, year = {2008}, month = {sep}, pages = {L18601}, abstract = {Posidonia oceanica is a widespread coastal Mediterranean seagrass which accumulates in its subsurface large quantities of organic material derived from its roots, rhizomes and leaf sheaths embedded in sandy sediments. These organic deposits may be up to several meters thick as they accumulate over thousands of years forming the matte, whose high content in organic carbon plays a major role in the global ocean carbon cycle. In this study, very high-resolution seismo-acoustic methods were applied to image the subsurface features of a P. oceanica seagrass meadow at Portlligat (Cadaqu{\'e}s, Girona, Spain), in the NW-Mediterranean Sea. Our findings yield fresh insights into the settling of the P. oceanica meadow in the study area, and define with unprecedented detail the potential volume occupied by the matte. A strong reflector, located from 4.3 to 11.7 m depth, was recognized in several seismo-acoustic profiles as the substratum on which P. oceanica first settled in the study area. A 3D bathymetric model of this substratum allowed us to reconstruct the Portlligat palaeo-environment prior to the settling of P. oceanica, which corresponded to a shallow coastal setting protected from the open sea. A core drilled in the meadow at Portlligat revealed the presence of a 6 in thick dense matte composed of medium to coarse, sandy sediments mixed with plant debris and bioclasts. Radiocarbon datings revealed a constant accretion rate of the matte of about 1.1 m/kyr. Gravelly bioclastic deposits observed at the base of the core correspond to the base of the matte and gave a date of 5616 {\textpm} 46 Cal yr BP. For the first time, very high-resolution marine geophysical techniques allowed us to accurately define the volume occupied by P. oceanica matte, which in the study area reaches up to almost 220,000 {\textpm} 17,400 M3. This result is an important step forward in our efforts to estimate the size of the carbon sink represented by P. oceanica meadows along the Mediterranean coasts significantly contributing to the biosphere carbon cycle. Copyright 2008 by the American Geophysical Union.}, issn = {0094-8276}, doi = {10.1029/2008GL034773}, url = {http://www.scopus.com/inward/record.url?eid=2-s2.0-57849159443\&partnerID=tZOtx3y1}, author = {Lo Iacono, Claudio and Mateo, Miguel Angel and Gr{\'a}cia, Eul{\`a}lia and Guasch, Lluis and Carbonell, Ram{\'o}n and Serrano, Laura and Serrano, Oscar and Da{\~n}obeitia, Juanjo} }