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Open access. Please, contact corresponding author in case of doubts, Description: The Malaspina2010_chlorophyll.xlsx file contains the fluorimetric chlorophyll a data of the circunnavigation expedition Malaspina 2010, which took place between 14/12/2010 and 14/07/2011 on board the BIO Hespérides. The data presented here were obtained between 16/12/2010 and 11/07/2011. The date and position of the sampling stations are listed in the third sheet of the file. Methods: Water samples for fluorimetric chlorophyll a (Chl a) determination were collected from 3 m depth with a 30-liter Niskin bottle and from selected depths between 10 and 200 m with a Rosette of 24 10-liter Niskin bottles attached to a CTD probe. Chl a determination was carried out as described in Estrada et al. (2012). Briefly, between 200 and 500 cm3 of seawater were filtered through GF/F glass fiber filters that were subsequently frozen at -20°C and, after a minimum of 6 hours, introduced in vials with acetone 90% and left for 24 hours in the dark, at 4ºC. The Chl a concentration in the acetonic extracts was measured with a Turner Designs fluorimeter calibrated with a pure Chl a standard (Sigma-Aldrich); no phaeopigment correction was applied. Size-fractionated analyses of Chl a were performed for samples from surface, the 20% surface PAR and the deep chlorophyll maximum. The analyses were carried out by sequential filtration of a 500 cm3 of seawater through Poretics (polycarbonate) membrane filters of pore sizes 20 μm, 2 μm and 0.2 μm, which were subsequently treated as the GF/F ones (Estrada, 2012), This work was supported by Consolider-Ingenio 2010, CSD2008-00077 of the former Spanish Ministerio de Ciencia e Innovación (ES) (now www.ciencia.gob.es) and the Consejo Superior de Investigaciones Científicas (CSIC) (ES)., Authors; Methods; Station positions; leg 1; leg 2; Legs 3-4; leg 5; leg 6; leg 7; References, Peer reviewed

Description: The Malaspina2010_chlorophyll.xlsx file contains the inorganic nutrient concentration data of the circunnavigation expedition Malaspina 2010, which took place between 14/12/2010 and 14/07/2011 on board the BIO Hespérides. The date and position of the sampling stations are listed in the “Data” sheet of the file. Methods: Water samples for measurement of the concentration of nitrate, nitrite (nitrate + nitrite in leg 1), phosphate and silicate were collected from 3 m depth with a 30-liter Niskin bottle and from selected depths between 10 and 200 m with a Rosette of 24 10-liter Niskin bottles attached to a CTD probe. Inorganic nutrient concentrations were determined by means of a Skalar autoanalyzer, following the standard spectrophotometric procedures described in Grasshoff et al. (1999) and Blasco et al. (2012); in leg 1, nitrite was not determined separately and phosphate was measured using a manual method (Vidal et al. 2012), This work was supported by Consolider-Ingenio 2010, CSD2008-00077 of the former Spanish Ministerio de Ciencia e Innovación (ES) (now www.ciencia.gob.es) and the Consejo Superior de Investigaciones Científicas (CSIC) (ES), Peer reviewed

MALASPINA_LEG1 Cruise (29HE20101215) carried out on the Research Vessel Hespérides in 2010, A circumnavigation oceanographic expedition to generate a high resolution inventory of global change impact on the ecosystem of the ocean, researching its biodiversity in the deep. 1) PHYSICAL OCEANOGRAPHY: The main objective of the Physical Oceanography block is to contribute to understanding the oceanic variability by determining the trends of the different properties of the main bodies of water in the oceans, such as temperature, salinity and oxygen concentration, thus will allow us to determine the variation of atmospheric conditions. 2) BIOCHEMISTRY: The MALASPINA 2010 expedition will study on an unprecedented scale the biogeochemical processes in the ocean on a global scale. It will be investigated where the elements that contribute to life near the surface come from, and what is the fate of the organic matter generated by photosynthesis . The breath of the sea will be measured: the exhalation of gases that conditions our atmosphere and climate. 3) ATMOSPHERIC DEPOSITION: The objectives of block : "organic pollutants and atmospheric deposition" focus on the measurements of the levels of several families of organic pollutants in the global ocean and atmosphere and the quantification of air-ocean flows and their impact on food chains planktonics (phytoplankton and zooplankton). In addition, a characterization and quantification of the flows of organic carbon, aerosols, nutrients and organic biogenic compounds, and the role they play in the ocean biogeochemical cycles will also be carried out. 4) OCEAN OPTICS: In the Malaspina expedition we are going to study the optics of the ocean that involves measuring mainly the color of water and its transparency to solar radiation. 5) BIODIVERSITY AND MICROBIAL PROCESSES: Our main objective is to investigate, to know, what microorganisms are found and how they are acting in the different oceans of the planet, placing special emphasis on the vast and practically unknown deep ocean. 6) ZOOPLANKTON: The objective of this thematic block is to assess the diversity and efficiency of the energy transfer of the ocean zooplankton community on a global scale. 7) PHYTOPLANKTON AND BIOLOGICAL PRODUCTION: Quantify how solar radiation is transmitted through the water column. The behavior of the photosynthetically active light band, which includes visible light of wavelengths between 400 and 700, and of bands of light in the ultraviolet zone will be studied separately. Quantify the magnitude of the organic matter (in particulate and dissolved form) synthesized by the photosynthetic phytoplankton (the so-called primary production or PP), Quantify the carbon consumed by the respiration of the pelagic community, from the surface to the deepest levels of the water column) and compare it with the PP of the different areas visited, - Study the structure of sizes and the distribution by groups of the phytoplankton communities, Evaluate how phytoplankton growth rates vary in response to changes in PAR intensity, ultraviolet radiation and temperature, Estimate the losses due to cell death 8) POPULAR SCIENCE: The Malaspina project has among its objectives to inform society about the impact of global change on the ocean and new opportunities to explore marine biodiversity, increase social awareness of the original Malaspina expedition and encourage scientific vocations among young people 9) STUDENT TRAINING: The Malaspina 2010 project aims to promote scientific vocations among our young people by providing a highly visible activity that will combine aspects of frontier research with an adventure component and attractive teamwork as a training framework. Six universities (U. de Barcelona, U. de Granada, U. de Oviedo, U. de Cádiz, U. Las Palmas de Gran Canaria and U. Internacional Menéndez Pelayo and the CSIC) have come together to offer a common module in their postgraduate programs that will offer students the opportunity to participate in the Malaspina Expedition to develop their postgraduate project