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126 Research products, page 1 of 13

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  • 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 English
    Authors: 
    Vries, Joost; Monteiro, Fanny; Wheeler, Glen; Poulton, Alex; Godrijan, Jelena; Cerino, Federica; Malinverno, Elisa; Langer, Gerald; Brownlee, Colin;
    Project: EC | MEDSEA (265103), UKRI | NSFGEO-NERC An unexpected... (NE/N011708/1), MZOS | Mechanism of long-term ch... (098-0982705-2731), EC | SEACELLS (670390), UKRI | GW4+ - a consortium of ex... (NE/L002434/1)

    Coccolithophores are globally important marine calcifying phytoplankton that utilize a haplo-diplontic life cycle. The haplo-diplontic life cycle allows coccolithophores to divide in both life cycle phases and potentially expands coccolithophore niche volume. Research has, however, to date largely overlooked the life cycle of coccolithophores and has instead focused on the diploid life cycle phase of coccolithophores. Through the synthesis and analysis of global scanning electron microscopy (SEM) coccolithophore abundance data (n=2534), we find that calcified haploid coccolithophores generally constitute a minor component of the total coccolithophore abundance (≈ 2 %–15 % depending on season). However, using case studies in the Atlantic Ocean and Mediterranean Sea, we show that, depending on environmental conditions, calcifying haploid coccolithophores can be significant contributors to the coccolithophore standing stock (up to ≈30 %). Furthermore, using hypervolumes to quantify the niche of coccolithophores, we illustrate that the haploid and diploid life cycle phases inhabit contrasting niches and that on average this allows coccolithophores to expand their niche by ≈18.8 %, with a range of 3 %–76 % for individual species. Our results highlight that future coccolithophore research should consider both life cycle stages, as omission of the haploid life cycle phase in current research limits our understanding of coccolithophore ecology. Our results furthermore suggest a different response to nutrient limitation and stratification, which may be of relevance for further climate scenarios. Our compilation highlights the spatial and temporal sparsity of SEM measurements and the need for new molecular techniques to identify uncalcified haploid coccolithophores. Our work also emphasizes the need for further work on the carbonate chemistry niche of the coccolithophore life cycle.

  • Other research product . Other ORP type . 2021
    English
    Authors: 
    Corgnati; L.;
    Country: Italy
    Project: EC | SeaDataCloud (730960)

    The applications are designed for High Frequency Radar (HFR) data management according to the European HFR node processing workflow, thus generating aggregated radial and total velocity files in netCDF format according to the European standard data and metadata model for near real time HFR current data. These applications implement the periodic temporal aggregation of the datasets and the related CDI metadata to be distributed via SeaDataCloud. These applications are designed for the centralized run at the EU HFR Node.

  • Other research product . Other ORP type . 2020
    Open Access English
    Authors: 
    Maffezzoli, Niccolo; Vallelonga, Paul T; Edwards, Ross; Saiz-Lopez, Alfonso; Turetta, Clara; Kjar, Helle Astrid; Barbante, Carlo; Vinther, Bo M; Spolaor, Andrea;
    Publisher: PANGAEA - Data Publisher for Earth & Environmental Science
    Country: Italy

    Concentrations of magnesium (Mg), calcium (Ca) and chlorine (Cl) measured in the 2015 RECAP ice core by inductive coupled plasma mass spectroscopy (ICPMS) along the 120,000 year-record. Note that the three analytes have not been measured continuously.Note that the below 562 meters the ice has not been dated.

  • Other research product . Other ORP type . 2020
    English
    Authors: 
    Penna, Pierluigi; Belardinelli, Andrea; Croci, Camilla Sofia; Domenichetti, Filippo; Martinelli, Michela;
    Country: Italy
    Project: EC | JERICO-NEXT (654410), EC | JERICO (262584), EC | NEXOS (614102)

    From 2003 to 2013, the Ancona section of CNR-IRBIM (formerly part of CNR-Institute of Marine Science) runned the “Fishery Observing System” (FOS) program aimed at using Italian fishing vessels as Vessels Of Opportunity (VOOs) for the collection of scientifically useful datasets (Falco et al. 2007). Some commercial fishing vessels, targetting small pelagic species in the northern and central Adriatic Sea, were equipped with an integrated system for the collection of information on catches, position of the fishing operation, depth and water temperature during the haul, producing a great amount of data that demonstrated to be helpful both for oceanographic and fishery biology purposes (Carpi et al. 2015; Aydoğdu et a. 2016; Sparnocchia et al. 2016; Lucchetti et al. 2018). In 2012, thanks to the participation to some national and international projects (e.g. SSD-Pesca, EU-FP7 JERICO etc.), CNR started the development of a new modular “Fishery & Oceanography Observing System” (FOOS; Patti et al. 2013). New sensors for oceanographic and meteorological data allow nowadays the FOOS to collect more parameters, with higher accuracy and to send them directly to a data center in near real time (Martinelli et al. 2016; Sparnocchia et al. 2017). Furthermore, the FOOS is a multifunction system able to collect various kind of data from the fishing operations and also to send back to the fishermen useful information (e.g. weather and sea forecasts, etc.) through an electronic logbook with an ad hoc software embedded. The new FOOS installed on various kind of fishing vessels targetting different resources, allowed a spatial extension of the monitored areas in the Mediterranean Sea (Patti et al. 2013). CNR-IRBIM implemented the “AdriFOOS” observational system, by installing the FOOS on some commercial fishing boats operating in the Adriatic Sea. Since then the datacenter based in Ancona receives daily data sets of environmental parameters collected along the water column and close to the sea bottom (eg. temperature, salinity, etc.), together with GPS haul tracks, catch amounts per haul, target species sizes and weather information. Some temperature and salinity measurements acquired by the FOOS in the Adriatic Sea from January 2014 to March 2015 were published within the JERICO project and some oxygen and fluorescence profiles obtained in 2017 within the NEXOS project. The dataset here presented contains 14803 depth/temperature profiles collected by 10 vessels of the AdriFOOS fleet in the period 2012-2020. All the profiles were subjected to quality control.Data are flagged according the L20 (SEADATANET MEASURAND QUALIFIER FLAGS).

  • Open Access English
    Authors: 
    Maffezzoli, Niccolo; Vallelonga, Paul T; Edwards, Ross; Saiz-Lopez, Alfonso; Turetta, Clara; Kjar, Helle Astrid; Barbante, Carlo; Vinther, Bo M; Spolaor, Andrea;
    Publisher: PANGAEA - Data Publisher for Earth & Environmental Science
    Country: Italy

    Concentrations of sodium (Na), bromine (Br), calcium (Ca), magnesium (Mg) and chlorine (Cl) measured in the 2015 RECAP ice core by inductive coupled plasma mass spectroscopy (ICPMS) along the 120,000 year-record, as well as the sea-salt sodium (ssNa) calculations are presented. In the 0-8 kyr b2015 section only the Br and Na series are presented, as 100-yr averages. Note that the Holocene section from 0 to 8200 yr b2015 are 100-yr averages.Note that the below 562 meters the ice has not been dated.

  • Other research product . Other ORP type . 2020
    English
    Authors: 
    Verbrugge Nathalie; Etienne Hélène; Boone Christine; Mader Julien; Corgnati Lorenzo; Mantovani Carlo; Reyes Emma; Rubio Anna; Rotllan Paz; Asensio J. L.; +1 more
    Country: Italy

    This Product User Manual describes the INSITU_GLO_UV_NRT_OBSERVATIONS_013_048 product distributed by the Copernicus Marine Service In Situ Thematic Assembly Centre (CMEMS INS-TAC): how it is built, what is the content, what data services are available to access them, and how to use the files. This product concerns four real-time datasets dedicated to near-surface currents measurements coming from two platform categories (Lagrangian surface drifters and High Frequency radars): drifter: near-surface zonal and meridional raw velocities measured by drifting buoys, wind & wind stress components, quality flags and metadada. These surface observations are part of the DBCP's Global Drifter Program (see Table 1) drifter_filt: near-surface zonal and meridional velocities and 3-day filtered (with a Lanczos filter) velocities measured by drifting buoys. All the platforms are gathered together and concatenated in concatenated daily files. radar_total: near-surface zonal and meridional raw velocities measured by High Frequency radars (HFR), standard deviation of near-surface zonal and meridional raw velocities, Geometrical Dilution of Precision (GDOP), quality flags and metadata. These surface observations are part of the European HF radar Network (see Mader et al, 2017 and Corgnati et al., 2018) radar_radial: near-surface zonal and meridional components of raw radial velocities measured by HFRs, magnitude and direction of near-surface zonal and meridional components of raw radial velocities (measured in the radial directions covered by each of the HFR stations), standard deviation of near-surface zonal and meridional components of raw radial velocities, quality flags and metadata. These surface observations are part of the European HF radar Network (see Mader et al, 2017 and Corgnati et al., 2018) Argo: ocean currents derived from the original trajectory data from Argo GDAC (Global Data Assembly Center). Deep current is calculated from floats drift at parking depth, surface current is calculated from float surface drift. The INS-TAC aims at providing a research and operational framework to develop and deliver in situ observations and derived products based on such observations, to address progressively global (GLO) but also regional needs either for monitoring, modelling or downstream service development.

  • Other research product . Other ORP type . 2020
    English
    Authors: 
    Carval Thierry; Chalkiopoulos Antonis; Perivoliotis Leonidas; De Alfonso Alonso-Muñoyerro Marta; Manzano Munoz Fernando; Ringheim Lid Sjur; Hammarklint Thomas; Sotiropoulou Maria; Guyot Corentin; Rottlan Paz; +3 more
    Country: Italy

    This document specifies the NetCDF file format of Copernicus Marine in situ used to distribute ocean in situ data and metadata. It documents the standards used herein; this includes naming conventions as well as metadata content. It was initiated in March 2019, based on OceanSITES and Argo user's manuals.

  • Open Access English
    Authors: 
    Galgani, Luisa; Tsapakis, Manolis; Pitta, Paraskevi; Tsiola, Anastasia; Tzempelikou, Eleni; Kalantzi, Ionna; Esposito, Chiara; Loiselle, Arturo; Tsotskou, Anastasia; Zivanovic, Snezana; +7 more
    Publisher: PANGAEA - Data Publisher for Earth & Environmental Science
    Project: EC | POSEIDOMM (702747)

    This dataset supports the recent publication "Microplastics increase the marine production of particulate forms of organic matter" by L. Galgani et al (2019) in ERL. It comprises all data presented in the manuscript and Supplementary Information. In the file, Control = mesocosm without plastic addition (1,2,3) and MP = mesocosm with plastic addition (1,2,3). The data proceed from the MESO-Plastic experiment in 2017 conducted at the Hellenic Center for Marine Research, a member of the European Aquacosm network of mesocosm facilities. The experiment received funding from the European Union's Horizon 2020 Research and Innovation Programme under the Marie Sk��odowska-Curie grant agreement No. 702747 - POSEIDOMM, to L. Galgani.

  • Open Access English
    Authors: 
    Maffezzoli, Niccolò; Vallelonga, Paul; Edwards, Ross; Saiz-Lopez, Alfonso; Turetta, Clara; Kjær, Helle Astrid; Barbante, Carlo; Vinther, Bo; Spolaor, Andrea;
    Project: EC | CLIMAHAL (726349), EC | ICE2ICE (610055)

    Although it has been demonstrated that the speed and magnitude of the recent Arctic sea ice decline is unprecedented for the past 1450 years, few records are available to provide a paleoclimate context for Arctic sea ice extent. Bromine enrichment in ice cores has been suggested to indicate the extent of newly formed sea ice areas. Despite the similarities among sea ice indicators and ice core bromine enrichment records, uncertainties still exist regarding the quantitative linkages between bromine reactive chemistry and the first-year sea ice surfaces. Here we present a 120 000-year record of bromine enrichment from the RECAP (REnland ice CAP) ice core, coastal east Greenland, and interpret it as a record of first-year sea ice. We compare it to existing sea ice records from marine cores and tentatively reconstruct past sea ice conditions in the North Atlantic as far north as the Fram Strait (50–85∘ N). Our interpretation implies that during the last deglaciation, the transition from multi-year to first-year sea ice started at ∼17.5 ka, synchronously with sea ice reductions observed in the eastern Nordic Seas and with the increase in North Atlantic ocean temperature. First-year sea ice reached its maximum at 12.4–11.8 ka during the Younger Dryas, after which open-water conditions started to dominate, consistent with sea ice records from the eastern Nordic Seas and the North Icelandic shelf. Our results show that over the last 120 000 years, multi-year sea ice extent was greatest during Marine Isotope Stage (MIS) 2 and possibly during MIS 4, with more extended first-year sea ice during MIS 3 and MIS 5. Sea ice extent during the Holocene (MIS 1) has been less than at any time in the last 120 000 years.