Advanced search in Research products
Research products
arrow_drop_down
Searching FieldsTerms
Any field
arrow_drop_down
includes
arrow_drop_down
Include:
The following results are related to European Marine Science. Are you interested to view more results? Visit OpenAIRE - Explore.
2,171 Research products, page 1 of 218

  • European Marine Science
  • Research data
  • Other research products
  • 2018-2022
  • EU
  • KR

10
arrow_drop_down
Date (most recent)
arrow_drop_down
  • Open Access English
    Authors: 
    Romero-Alvarez, Johana; Lupaşcu, Aurelia; Lowe, Douglas; Badia, Alba; Acher-Nicholls, Scott; Dorling, Steve R.; Reeves, Claire E.; Butler, Tim;
    Project: EC | ASIBIA (616938)

    Tropospheric ozone (O3) concentrations depend on a combination of hemispheric, regional, and local-scale processes. Estimates of how much O3 is produced locally vs. transported from further afield are essential in air quality management and regulatory policies. Here, a tagged-ozone mechanism within the Weather Research and Forecasting model coupled with chemistry (WRF-Chem) is used to quantify the contributions to surface O3 in the UK from anthropogenic nitrogen oxide (NOx) emissions from inside and outside the UK during May–August 2015. The contribution of the different source regions to three regulatory O3 metrics is also examined. It is shown that model simulations predict the concentration and spatial distribution of surface O3 with a domain-wide mean bias of −3.7 ppbv. Anthropogenic NOx emissions from the UK and Europe account for 13 % and 16 %, respectively, of the monthly mean surface O3 in the UK, as the majority (71 %) of O3 originates from the hemispheric background. Hemispheric O3 contributes the most to concentrations in the north and the west of the UK with peaks in May, whereas European and UK contributions are most significant in the east, south-east, and London, i.e. the UK's most populated areas, intensifying towards June and July. Moreover, O3 from European sources is generally transported to the UK rather than produced in situ. It is demonstrated that more stringent emission controls over continental Europe, particularly in western Europe, would be necessary to improve the health-related metric MDA8 O3 above 50 and 60 ppbv. Emission controls over larger areas, such as the Northern Hemisphere, are instead required to lessen the impacts on ecosystems as quantified by the AOT40 metric.

  • Open Access English
    Authors: 
    Galgani, Luisa; Tzempelikou, Eleni; Kalantzi, Ioanna; Tsiola, Anastasia; Tsapakis, Manolis; Paraskevi, Pitta; Esposito, Chiara; Tsotskou, Anastasia; Magiopoulos, Iordanis; Benavides, Roberto; +2 more
    Publisher: Zenodo
    Project: EC | POSEIDOMM (702747)

    Microplastics are substrates for microbial activity and can influence biomass production. This has potentially important implications in the sea-surface microlayer, the marine boundary layer that controls gas exchange with the atmosphere and where biologically produced organic compounds can accumulate. In the present study, we used six large scale mesocosms to simulate future ocean scenarios of high plastic concentration. Each mesocosm was filled with 3 m3 of seawater from the oligotrophic Sea of Crete, in the Eastern Mediterranean Sea. A known amount of standard polystyrene microbeads of 30 μm diameter was added to three replicate mesocosms, while maintaining the remaining three as plastic-free controls. Over the course of a 12-day experiment, we explored microbial organic matter dynamics in the sea-surface microlayer in the presence and absence of microplastic contamination of the underlying water. Our study shows that microplastics increased both biomass production and enrichment of carbohydrate-like and proteinaceous marine gel compounds in the sea-surface microlayer. Importantly, this resulted in a 3 % reduction in the concentration of dissolved CO2 in the underlying water. This reduction was associated to both direct and indirect impacts of microplastic pollution on the uptake of CO2 within the marine carbon cycle, by modifying the biogenic composition of the sea's boundary layer with the atmosphere. for information: luisa.galgani@icloud.com; luisa.galgani@unisi.it; lgalgani@geomar.de

  • Open Access
    Authors: 
    Scoto, Federico; Sadatzki, Henrik; Maffezzoli, Niccolò; Barbante, Carlo; Gagliardi, Alessandro; Varin, Cristiano; Vallelonga, Paul; Gkinis, Vasileios; Dahl-Jensen, Dorthe; Kjær, Helle Astrid; +4 more
    Publisher: Zenodo
    Project: EC | ICE2ICE (610055), EC | PAST4FUTURE (243908)

    Dataset s1: Sub-decadal sodium, bromine, and bromine enrichment data from NEEM ice core between 34-42 ka b2k. Dataset s2: Magnetic susceptibility, total organic carbon (TOC) and biomarkers data (IP25, brassicasterol, HBI-III) from the Eirik Drift core GS16-204-23CC, covering 31-42 ka b2k.

  • Open Access
    Authors: 
    Scoto, Federico; Sadatzki, Henrik; Maffezzoli, Niccolò; Barbante, Carlo; Gagliardi, Alessandro; Varin, Cristiano; Vallelonga, Paul; Gkinis,Vasileios; Dahl-Jensen, Dorthe; Kjær,Helle Astrid; +4 more
    Publisher: Zenodo
    Project: EC | ICE2ICE (610055), EC | PAST4FUTURE (243908)

    Sub-decadal sodium, bromine, and bromine enrichment data from NEEM ice core between 34-42 ka b2k.

  • Open Access English
    Authors: 
    Kjær, Helle Astrid; Zens, Patrick; Black, Samuel; Lund, Kasper Holst; Svensson, Anders; Vallelonga, Paul;
    Project: EC | ICE2ICE (610055)

    Greenland ice cores provide information about past climate. Few impurity records covering the past 2 decades exist from Greenland. Here we present results from six firn cores obtained during a 426 km long northern Greenland traverse made in 2015 between the NEEM and the EGRIP deep-drilling stations situated on the western side and eastern side of the Greenland ice sheet, respectively. The cores (9 to 14 m long) are analyzed for chemical impurities and cover time spans of 18 to 53 years (±3 years) depending on local snow accumulation that decreases from west to east. The high temporal resolution allows for annual layers and seasons to be resolved. Insoluble dust, ammonium, and calcium concentrations in the six firn cores overlap, and the seasonal cycles are also similar in timing and magnitude across sites, while peroxide (H2O2) and conductivity both have spatial variations, H2O2 driven by the accumulation pattern, and conductivity likely influenced by sea salt. Overall, we determine a rather constant dust flux over the period, but in the data from recent years (1998–2015) we identify an increase in large dust particles that we ascribe to an activation of local Greenland sources. We observe an expected increase in acidity and conductivity in the mid-1970s as a result of anthropogenic emissions, followed by a decrease due to mitigation. Several volcanic horizons identified in the conductivity and acidity records can be associated with eruptions in Iceland and in the Barents Sea region. From a composite ammonium record we obtain a robust forest fire proxy associated primarily with Canadian forest fires (R=0.49).

  • Open Access English
    Authors: 
    Droste, Elise S.; Hoppema, Mario; González-Dávila, Melchor; Santana-Casiano, Juana Magdalena; Queste, Bastien Y.; Dall'Olmo, Giorgio; Venables, Hugh J.; Rohardt, Gerd; Ossebaar, Sharyn; Schuller, Daniel; +2 more
    Project: EC | CARBOCHANGE (264879)

    Tides significantly affect polar coastlines by modulating ice shelf melt and modifying shelf water properties through transport and mixing. However, the effect of tides on the marine carbonate chemistry in such regions, especially around Antarctica, remains largely unexplored. We address this topic with two case studies in a coastal polynya in the south-eastern Weddell Sea, neighbouring the Ekström Ice Shelf. The case studies were conducted in January 2015 (PS89) and January 2019 (PS117), capturing semi-diurnal oscillations in the water column. These are pronounced in both physical and biogeochemical variables for PS89. During rising tide, advection of sea ice meltwater from the north-east created a fresher, warmer, and more deeply mixed water column with lower dissolved inorganic carbon (DIC) and total alkalinity (TA) content. During ebbing tide, water from underneath the ice shelf decreased the polynya's temperature, increased the DIC and TA content, and created a more stratified water column. The variability during the PS117 case study was much smaller, as it had less sea ice meltwater input during rising tide and was better mixed with sub-ice shelf water. The contrasts in the variability between the two case studies could be wind and sea ice driven, and they underline the complexity and highly dynamic nature of the system. The variability in the polynya induced by the tides results in an air–sea CO2 flux that can range between a strong sink (−24 mmol m−2 d−1) and a small source (3 mmol m−2 d−1) on a semi-diurnal timescale. If the variability induced by tides is not taken into account, there is a potential risk of overestimating the polynya's CO2 uptake by 67 % or underestimating it by 73 %, compared to the average flux determined over several days. Depending on the timing of limited sampling, the polynya may appear to be a source or a sink of CO2. Given the disproportionate influence of polynyas on heat and carbon exchange in polar oceans, we recommend future studies around the Antarctic and Arctic coastlines to consider the timing of tidal currents in their sampling strategies and analyses. This will help constrain variability in oceanographic measurements and avoid potential biases in our understanding of these highly complex systems.

  • Research data . 2022
    English
    Authors: 
    Reñé, Albert; Timoneda Solé, Natàlia; Sarno, Diana; Zingone, Adriana; Margiotta, Francesca; Passarelli, Augusto; Gallia, Roberto; Tramontano, Ferdinando; Montresor, Marina; Garcés, Esther;
    Publisher: CSIC - Instituto de Ciencias del Mar (ICM)
    Country: Spain
    Project: EC | ASSEMBLE Plus (730984)

    The presence of phytoplankton parasites along the water column was explored at the Long Term Ecological Station MareChiara (LTER-MC) in the Gulf of Naples (Mediterranean Sea) in October 2019. Microscopy analyses showed diatoms dominating the phytoplankton community in the upper layers (0-20 m). Metabarcoding data from the water column showed the presence of Chytridiomycota predominantly in the upper layers coinciding with the vertical distribution of diatoms. Laboratory incubations of natural samples enriched with different diatom cultures confirmed parasitic interactions of some of those chytrids – including members of Kappamyces – with diatom taxa. The temporal dynamics of diatoms and chytrids was also explored in a three-year metabarcoding time-series (2011-2013) from surface waters of the study area and in sediment samples. Chytrids were recurrently present at low relative abundances, and some taxa found to infect diatoms in the incubation experiments were also identified in the ASV time-series. However, co-occurrence analyses did not show any clear or recurrent pairing patterns for chytrid and diatom taxa along the three years. The chytrid community in the sediments showed a clearly different species composition compared to the recorded in the water column samples, with higher diversity and relative abundance. The combination of observations, incubations and metabarcoding confirmed that parasites are a common component of marine protist communities at LTER-MC. Host-parasite interactions must be determined and quantified to understand their role and the impact they have on phytoplankton dynamics File1: VERDI_samples_parameters.xlsx - Physico-chemical variables obtained from CTD profile - Inorganic nutrients concentrations - Chlorophyll-a concentrations - Organic carbon and nitrogen concentrations - Phytoplankton abundances - Detections of chytrids File 2: VERDI_asv_table.tbl: ASV abundances from natural samples and incubations File 3: VERDI_tax_table.tbl: Taxonomic assignments of ASVs File 4: VERDI_asv_seqs.fa: Sequences of ASVs File 5: VERDI_incubations_images.zip - Compilation of images taken during incubations with diatoms - Physico-chemical variables obtained from CTD profile - Inorganic nutrients concentrations - Chlorophyll-a concentrations - Organic carbon and nitrogen concentrations - Phytoplankton abundances - Detections of chytrids - Metabarcoding ASV abundances from natural samples and incubations - Metabarcoding Taxonomic assignments of ASVs - Metabarcoding Sequences of ASVs - Compilation of images taken during incubations with diatoms - European Union’s Horizon 2020 research and innovation programme under grant agreement No 730984, ASSEMBLE Plus project. - Spanish MICINN Project SMART (PID2020-112978GB-I00) - The research program LTER-MC is funded by the Stazione Zoologica Anton Dohrn Peer reviewed

  • Open Access English
    Authors: 
    de Froe, Evert; Maier, Sandra R.; Horn, Henriette G.; Wolff, George. A.; Blackbird, Sabena; Mohn, Christian; Schultz, Mads; van der Kaaden, Anna-Selma; Cheng, Chiu H.; Wubben, Evi; +6 more
    Publisher: Zenodo
    Project: EC | ATLAS (678760), EC | ATLAS (678760)

    This file contains the raw data and data analyses scripts to: Hydrography and food distribution during a tidal cycle above a cold-water coral mound Evert de Froe, Sandra R. Maier, Henriette G. Horn, George A. Wolff, Sabena Blackbird, Christian Mohn, Mads Schultz, Anna-Selma van der Kaaden, Chiu H. Cheng, Evi Wubben, Britt van Haastregt, Eva Friis Moller, Marc Lavaleye, Karline Soetaert, Gert-Jan Reichart, Dick van Oevelen. Deep Sea Research Part I: Oceanographic Research Papers, 2022, ISSN 0967-0637, https://doi.org/10.1016/j.dsr.2022.103854. Abstract: Cold-water corals (CWCs) are important ecosystem engineers in the deep sea that provide habitat for numerous species and can form large coral mounds. These mounds influence surrounding currents and induce distinct hydrodynamic features, such as internal waves and episodic downwelling events that accelerate transport of organic matter towards the mounds, supplying the corals with food. To date, research on organic matter distribution at coral mounds has focussed either on seasonal timescales or has provided single point snapshots. Data on food distribution at the timescale of a diurnal tidal cycle is currently limited. Here, we integrate physical, biogeochemical, and biological data throughout the water column and along a transect on the south-eastern slope of Rockall Bank, Northeast Atlantic Ocean. This transect consisted of 24-hour sampling stations at four locations: Bank, Upper slope, Lower slope, and the Oreo coral mound. We investigated how the organic matter distribution in the water column along the transect is affected by tidal activity. Repeated CTD casts indicated that the water column above Oreo mound was more dynamic than above other stations in multiple ways. First, the bottom water showed high variability in physical parameters and nutrient concentrations, possibly due to the interaction of the tide with the mound topography. Second, in the surface water a diurnal tidal wave replenished nutrients in the photic zone, supporting new primary production. Third, above the coral mound an internal wave (200 m amplitude) was recorded at 400 m depth after the turning of the barotropic tide. After this wave passed, high quality organic matter was recorded in bottom waters on the mound coinciding with shallow water physical characteristics such as high oxygen concentration and high temperature. Trophic markers in the benthic community suggest feeding on a variety of food sources, including phytodetritus and zooplankton. We suggest that there are three transport mechanisms that supply food to the CWC ecosystem. First, small phytodetritus particles are transported downwards to the seafloor by advection from internal waves, supplying high quality organic matter to the CWC reef community. Second, the shoaling of deeper nutrient-rich water into the surface water layer above the coral mound could stimulate diatom growth, which form fast-sinking aggregates. Third, evidence from lipid analysis indicates that zooplankton faecal pellets also enhance supply of organic matter to the reef communities. This study is the first to report organic matter quality and composition over a tidal cycle at a coral mound and provides evidence that fresh high-quality organic matter is transported towards a coral reef during a tidal cycle. SM, and DvO were supported by the Innovational Research Incentives Scheme of the Netherlands Organisation for Scientific Research (NWO), respectively, under grant agreement 864.13.007. We acknowledge the funding of the Netherlands Organisation for Scientific Research NWO and Royal Netherlands Institute for Sea Research NIOZ in organising the Netherlands Initiative Changing Oceans NICO expedition in 2018.

  • Open Access
    Authors: 
    Prokkola, Jenni M; Wagner, Anita; Koskinen, Elisabeth; Debes, Paul V; House, Andrew; Åsheim, Eirik; Primmer, Craig; Pirinen, Eija; Aykanat, Tutku;
    Publisher: Zenodo
    Project: EC | MATURATION (742312), EC | MATURATION (742312)

    Data and R codes for the analyses reported in Prokkola et al. (pre-print, 2022) Adipose tissue mitochondrial respiration in Atlantic salmon: implications for sex-dependent life-history variation. Overview of files can be found in the README file. The file "Cell size data.zip" contains TIFF-images of adipose tissue cryosections, a README file, the result files for each image file and an R code for parsing the results files. To skip the data parsing steps and get the final data, download the AdiposeTissue_data_all.txt file (tab-separated). Other funding sources: Academy of Finland (1328860 and 1325964 for T. A, 335443, 314383, 272376 and the Profi6 336449 funding for E.P., and 307593, 302873, 327255, and 342851 for C.R.P.) and the University of Helsinki

  • Open Access
    Authors: 
    Pesant, Stéphane; Arnaud-Haond, Sophie; Pradillon, Florence; Vanreusel, Anne; Ulloa, Osvaldo; Methou, Pierre; Roussel, Erwan; Cueff-Gauchard, Valérie; Godfroy, Anne; Sarrazin, Jozée;
    Publisher: Zenodo
    Project: EC | ATLAS (678760), EC | AtlantECO (862923), EC | ATLAS (678760), EC | AtlantECO (862923)

    This is a tabular version of the eDNAbyss sample provenance & environmental context metadata submitted to BioSamples (https://www.ebi.ac.uk/biosamples/samples?text=eDNAbyss).