BUSCADOR RECOLECTA

This dataset contains the results of the characterisation of the prokaryotic community by flow cytometry and tritiated leucine incorporation from the MAFIA cruise (Migrants and Active Flux In the Atlantic ocean). Samples were collected in the tropical and subtropical Atlantic during the MAFIA cruise (April 2015) on board the BIO Hespérides. Seawater samples were collected at 13 stations (from the Brazilian coast to the Canary Islands), from the surface down to 3500 m, using a General Oceanics oceanographic rosette equipped with 24 l PVC Niskin bottles. Abundance and cell characteristics (high nucleic acid content fraction, cell volume, viability) were based on measurements performed with a FACSCalibur (Becton-Dickinson) flow cytometer. Leucine incorporation rates were estimated with tritiated leucine (Kirchman et al. 1985) using centrifugation and filtration methods (Smith and Azam 1992). The aim of this dataset was to estimate the influence of surface productivity on the standing stock, characteristics and activity (as leucine incorporation) of prokaryotes across the water column, Horizon 2020 (H2020), grant/award no. 817806: Sustainable management of mesopelagic resources Ministerio de Ciencia e Innovación (MICINN), grant/award no. CTM2012-39587-C04: Migrants and Active Flux In the Atlantic Ocean; Ministerio de Ciencia e Innovación (MICINN), grant/award no. CTM2015-69392-C3: Constraining organic carbon fluxes in an eastern boundary upwelling ecosystem (NW Africa): the role of non-sinking carbon in the context of the biological pump; Ministerio de Ciencia e Innovación (MICINN), grant/award no. CTM2017-83362-R: INTERES: Papel de las interacciones fitoplancton-bacterias en la respuesta del plancton microbiano a la entrada de nutrientes alóctonos; Ministerio de Ciencia e Innovación (MICINN), grant/award no. PID2019-109084RB-C21: Biogeochemical impact of mesoscale and sub-mesoscale processes along the life history of cyclonic and anticyclonic eddies: plankton variability and productivity, Peer reviewed

Oceanographic data acquired during the eIMPACT-1 Cruise (29SG20220729) on board the Research Vessel Sarmiento de Gamboa in 2022., The general objective of e-IMPACT is to study the linkage between the dynamics of mesoscale and sub-mesoscale processes occurring along the life history of cyclonic and anticyclonic eddies in the Canary Eddy Corridor (CEC), and their effects on the structure and metabolism of the planktonic community, as well as in their role in the vertical carbon flux to the deep ocean. e-IMPACT will address the coupled dynamics between food-web diversity and function, in relation to the physical and chemical conditions, the origin and composition of DOC and POC and their contribution to remineralization rates in the twilight zone of the ocean.

PRACTICAS-00 Cruise (29GD20000222) carried out on the Research Vessel García del Cid in 2000, Practices of physical, biological and chemical oceanography and marine geology of the Marine Sciense faculty, University of Las Palmas de Gran Canaria

PRACTICAS-01 Cruise (29GD20010206) carried out on the Research Vessel García del Cid in 2001

MAST-1 Cruise (29HE19930805) carried out on the Research Vessel Hespérides in 1993, European Coastal Transition Zone-Islas Canarias. -To study the gradient of the hydrographic and biological transition, to the south of the Archipelago, from the oceanic waters west of the island of La Palma to the interior of the platform of the coast of Africa.- To study the structure and dynamics of the water of upwelling filaments, which extends towards the Canaries. -Make a detailed study of the fronts on both sides of the trail, and both sides of the filament. - Analyze the mechanisms of formation of the eddies, and calculate the speed of their displacement, in relation to the surface current. - Quantify the importance of eddies and filaments in the increase of productivity and transport of organic matter in the Canary region

FAX Cruise (29HE19990801) carried out on the Research Vessel Hespérides in 1999, Filament and Fluxes (CANIGO). The campaign was carried out in Canarian waters, the main objective was the estimation of the flows of heat, water, salts nutrient and organic material in a filament of the upwelling of Northwest Africa, and to determine the effect of this transport towards oligotrophic waters on the metabolic balance of carbon in the planktonic communities of the Canary region. The specific objectives of the campaign were: 1) Determine the variability and bidimensional structure of the surface fields of temperature, heat of the ocean, nutrients, inorganic carbon and currents, in relation to the filament, during the study period. 2) Determine the three-dimensional structure and field of currents in the upper 300 m of the filament, in order to determine the origin and dynamics of the filament waters. 3) Determine the flow of particulate and dissolved organic matter exported by the filaments from the upwelling to the oceanic waters. 4) Determine the spatial variability of phytoplanktonic phytosynthetic parameters, pigment concentrations and spectral quality of light in the filament region, to allow the development of primary production models on a regional scale. 5) Determine the metabolic balance of microbial communities (community production and respiration) in the transition zone from eutrophic waters to oligotrophic open waters. 6) Observe the langranian displacement field of a body of water along the "jet" of the filament, by means of drifting Argos buoys. 7) Study the evolution of the stratification, vertical shear, concentration of nutrients, productivity and bio-optical parameters in the upper 200 m of the water column, near a drifting buoy that runs along the "jet" of the filament

RODA-I Cruise (29HE20060811) carried out on the Research Vessel Hespérides in 2006, Oceanic eddies and Atmospheric Deposition in the Canary Current (Subtropical East Atlantic): monitoring, biological and biogeochemical effects, and flows to the deep ocean (RODA). RODA I was planned to evaluate the role of the Canary eddy field in the enhancement of organic matter fluxes

RODA-II Cruise (29HE20070201) carried out on the Research Vessel Hespérides in 2007, Oceanic eddies and atmospheric deposition: influence on particle flows and remineralization in the water column. Study of marine eddies and their relationship with cyclones and anticyclones. They have made diverse experiments, to analyze the lethal thresholds of complex mixtures of organic pollutants (PCBs, PAHs ) on natural communities of phytoplankton. Experiments related to ultraviolet radiation, PAHs and Net community production have also been carried out during the cruise

PUMP Cruise (29HE20140831) carried out on the Research Vessel Hespérides in 2014, Study of the Vertical Oceanic Pump in mesoscale eddies (PUMP). This project will study the dynamics/kinematics of the ageostrophic secondary circulation (ASC) and mixing in surface mesoscale anticyclonic eddies and how they modulate plankton activity, plankton community structure, and accumulation and downward transport of organic matter (the Vertical Oceanic Pump, VOP). For this purpose we will conduct a novel interdisciplinary sampling strategy to survey an anticyclonic eddy from a Lagrangian perspective with a resolution down to the submesoscale range using cutting-edge instrumentation and methodologies. We will pay particular attention to the control of the ASC by eddy/wind interaction, by mixing, and by current/wind interaction and frontogenesis/frontolysis at its periphery. ASC will be diagnosed from trajectories of drifters drogued at the Ekman layer and at the eddy´s interior and using an omega-type equation that will include direct measurements of mixing/turbulence. Mixing regime, dynamic stability and vertical diffusion of tracers will be observed and derived from direct measurement of mixing/turbulence. Near-inertial waves trapping and its role in driving shear mixing will be studied from drifter trajectories and from the vertical variability of the horizontal velocity field. To establish the dynamics that forces the VOP we will also develop processes-oriented models and implement regional physical and physical-biogeochemical models for the Canary Region. We will also take advantage of the exceptional source of tracer provided by the El Hierro Island submarine volcanic eruption for the study of eddy submesoscale spatial-temporal variability, combining satellite images and modeling. Finally the physical and biogeochemical observations and processes will be combined and correlated to derive a conceptual model of the dynamics of the marine system linked to the VOP in mesoscale eddies

HOTMIX Cruise (29SG20140427) carried out on the Research Vessel Sarmiento de Gamboa in 2014, This project will study the influence of mixing zones between water masses on the metabolism and biodiversity of microbial communities, and their impact on biogeochemical fluxes, in the deep ocean. The project will be carried out in the Mediterranean Sea as an example of experimental laboratory for its dynamic characteristics, with turnover times an order of magnitude smaller than in the open ocean (11 to 100 years). We will follow the evolution of the Levantine Intermediate Water (LIW) from its generation, in the eastern basin of the Mediterranean Sea until its flow to the North Atlantic through the Strait of Gibraltar. During its westward flow the LIW mixes both with surface water of Atlantic origin and deep Mediterranean waters, formed both in the eastern (Adriatic and Aegean Seas) and western (Gulf of Lions) basins. After outflowing through the Gulf of Cadiz, the LIW sinks down and spills over into the eastern Atlantic Ocean, mixing with different Atlantic waters, like the North Atlantic Central Water (NACW), the Subpolar Modal Water (SPMW) and the Labrador Sea Water (LSW). We will reproduce the "in situ" conditions (temperature, pH and hydrostatic pressure) in the deep ocean to study microbial metabolism using advanced methodologies. We will also examine the relationship between diversity, microbial metabolism and the elemental and molecular composition of the available organic matter at these interface regions. Finally, we will compare estimates of metabolic rates with geochemical approaches based on multiparametric analysis of water masses (OMP) and age estimates from transient tracers, helping to resolve the paradox of the imbalance between sources and sinks of carbon in the deep ocean