Diana Zúñiga

United Nations Economic and Social Commission for Asia and the Pacific

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Carmen G. Castro

Instituto de Investigacións Mariñas

M. Froján

Instituto de Investigacións Mariñas

Nicolás Villacieros‐Robineau

Instituto de Investigacións Mariñas

Fatima F Abrantes

University of Algarve

Emı́lia Salgueiro

University of Algarve

Fernando Alonso‐Pérez

Instituto Español de Oceanografía

Antoni Calafat

Universitat de Barcelona

F. G. Figueiras

Instituto de Investigacións Mariñas

Francisco de la Granda

Instituto de Investigacións Mariñas

Belén Arbones

Instituto de Investigacións Mariñas

Cooperative Institutions

Consejo Superior de Investigaciones Científicas

Universitat de Barcelona

Instituto de Investigacións Mariñas

Centre National de la Recherche Scientifique

Institut de Ciències del Mar

Institut Català de Ciències del Clima

Portuguese Sea and Atmosphere Institute

Marine Technology Unit

University of Algarve

Université de Perpignan

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Research Field

Mussel farming impact on pelagic production and respiration rates in a coastal upwelling embayment (Ría de Vigo, NW Spain)

Estuarine Coastal and Shelf Science (2018)

M. Froján Carmen G. Castro Diana Zúñiga Belén Arbones Fernando Alonso‐Pérez

Autotroph

10.1016/j.ecss.2018.02.025

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Citations (9)

Particulate organic carbon budget in the open Algero-Balearic Basin (Western Mediterranean): Assessment from a one-year sediment trap experiment

Deep Sea Research Part I Oceanographic Research Papers (2007)

Diana Zúñiga Antoni Calafat Anna Sánchez‐Vidal Miquel Canals B Price

Sediment trap

Sink (geography)

10.1016/j.dsr.2007.06.001

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Citations (33)

Spatial distribution and offshore export of total organic carbon along the eastern boundary of the Subtropical North Pacific

Advances in Oceanography and Limnology (2011)

Carmen G. Castro Curtis A. Collins J. Timothy Pennington Diana Zúñiga Francisco P. Chávez

Data collected in February, 2003, along the upper continental slope of western North America between Monterey Bay, California (37°N, 122°W), and Cabo San Lucas, Mexico (23°N, 118°W), document, for the first time, the alongshore distribution of total organic carbon (TOC). Highest TOC concentrations (>70 µM) were observed for waters above the nitracline and associated with both California Current and southern surface waters. The northward advection of tropical waters in the California Undercurrent did not have any discernible impact on TOC distributions. An estimate of the average rate at which TOC in surface waters was exported offshore by Ekman transport in February 2003 was 1.73 × 103 kg C yr−1 for each meter of coastline. The offshore flux estimate is thought to be conservative with respect to the annual mean offshore flux because the offshore Ekman transport and primary production increase in late spring and early summer and the contribution of upwelling filaments has not been considered. Analysis of TOC contributions to pelagic respiration suggested that TOC accounted for 45% of the oxygen decrease in southern oxic waters. In California Current and oxygen minimum zone waters, TOC did not contribute to pelagic respiration.

Ekman transport

10.4081/aiol.2011.5319

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Citations (1)

Supplementary material to "Spatial and temporal variability in coccolithophore abundance and distribution in the NW Iberian coastal upwelling system"

Blanca Ausín Diana Zúñiga José‐Abel Flores Catarina Cavaleiro M. Froján

Coccolithophore

10.5194/bg-2017-236-supplement

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Analysis of long-term oxygen variation in the NW Iberian Upwelling System

Diana Zúñiga Emı́lia Salgueiro R.F. Sánchez-Leal Nicolás Villacieros‐Robineau Célia Santos

Variation (astronomy)

Source

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Particle fluxes dynamics in Blanes submarine canyon (Northwestern Mediterranean)

Progress In Oceanography (2009)

Diana Zúñiga M.M. Flexas Anna Sánchez‐Vidal Johan Coenjaerts Antoni Calafat

Submarine canyon

10.1016/j.pocean.2009.07.002

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Citations (79)

Spatial and temporal variability of meiobenthic density in the Blanes submarine canyon (NW Mediterranean)

Progress In Oceanography (2013)

Chiara Romano J. Coenjaerts M.M. Flexas Diana Zúñiga Ann Vanreusel

Submarine canyon

Meiobenthos

10.1016/j.pocean.2013.07.026

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Citations (38)

Diatoms as paleoproductivity proxy in the NW Iberian coastal upwelling system (NE Atlantic)

Diana Zúñiga Celia Santos M. Froján Emı́lia Salgueiro Marta M Rufino

Abstract. The objective of the current work is to better understand how diatoms species determine primary production signal in exported and buried particles. We evaluated how the diatom’s abundance and assemblage composition is transferred from the photic zone into the seafloor sediments. A combined analysis of water column, sediment trap and surface sediment samples recovered in the NW Iberian coastal upwelling system was used. Diatom fluxes (2.2 ± 5.6 106 # valves m−2 d−1) represented the majority of the siliceous microorganisms sinking out from the photic zone and showed strong seasonal variability. During downwelling seasons, diatoms export signal was strongly affected by resuspension of bottom sediments and intense Minho and Douro riverine inputs, with benthic and freshwater diatoms (17–24 %) becoming relevant in the sediment trap assemblage. Nevertheless, during upwelling productive seasons, the diatoms exported out from surface layer reflected water column diatom assemblage. They were principally represented by Chaetoceros spp. (mean 46 ± 25 %) and Leptocylindrus spp. (mean 20 ± 22 %) resting spores, demonstrating that both groups are a good sedimentary imprint during highly productive periods. Moreover, our data showed that the sink of Chaetoceros spp. resting spores dominated under persistent upwelling winds, high irradiance levels and cold and nutrient-rich waters. Otherwise, Leptocylindrus spp. spore fluxes were favoured when northerly winds relax, and surface waters warming promotes water column stratification. Further, this finding will provide a proxy of persistent vs. intermittent upwelling conditions, which is of particular relevance in palaeoceanography.

Chaetoceros

Sediment trap

Downwelling

10.5194/bg-2016-201

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Citations (0)

Sediment undulations on the Llobregat prodelta: Signs of early slope instability or sedimentary bedforms?

Journal of Geophysical Research Atmospheres (2007)

Roger Úrgeles Ben De Mol Camino Liquete Miquel Canals Marc De Batist

A field of sediment undulations has been mapped by means of high‐resolution multibeam bathymetry and seismic reflection profiles in the Llobregat River prodelta, off the city of Barcelona, Catalonia, Spain. Similar features had previously been recognized in other prodelta environments and interpreted either as downslope sediment deformation or sedimentary structures induced by bottom currents or hyperpycnal flows. Since the study area is undergoing significant offshore development, proper interpretation of such sediment undulations is needed for a correct risk assessment. The occurrence of the sediment undulations is restricted to the prodelta front on slope gradients between 3 and 0.2°. The undulations have developed at the edge and atop an area of gas bearing sediments within the Late Holocene high‐stand mud wedge. An evaluation is made of the characteristics of the sediment undulations in order to determine the most likely process for the origin of these structures. Among these characteristics are the continuity of the reflections and lack of diffractions in between different undulations, their size distribution (large to small) both from shallow to deep and with depth in section, the asymmetry (decreasing from proximal to distal), the crest to trough vertical distance on the landward side of the undulations (up to 0.5 m), and the lack of features that could indicate a progressive movement such as growth structures and drag folds. These characteristics indicate that the sediment undulations on the Llobregat River prodelta do not result from sediment deformation but rather from the interaction of bottom currents generated by hyperpycnal flows from the Llobregat River with regional sea water circulation. Their identification as sediment waves implies that such features do not pose a major hazard for further offshore development.

Bedform

Trough (economics)

Terrigenous sediment

10.1029/2005jb003929

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Citations (44)

RAIA CTD surveys (42.1ºN) near Cape Silleiro (NW Iberia)

Eric D. Barton Beatriz Barreiro Thomas Meunier Francisco de la Granda Grandoso Nicolás Villacieros‐Robineau

This item is made of 2 files, of which 1 is the dataset in matlab format and the other (Readme .txt) include a small description of the computed variables. Dataset contributed to the Projects CAIBEX and RAIA.-- Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0). The STRAMIX team appreciates that users of these data: 1) Contact Des Barton (e.d.barton@iim.csic.es; barton.des@gmail.com ) or Carmen G. Castro (cgcastro@iim.csic.es) to follow the uses of the data, and 2) Include the requested acknowledgment (cite using the DOI of this dataset) in any presentations or publications

Cape

CTD

10.20350/digitalcsic/8960

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Citations (0)