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9 Research products, page 1 of 1

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  • Other research product . Other ORP type . 2021
    Open Access English
    Authors: 
    Fripiat, François; Marconi, Dario; Rafter, P.A.; Sigman, Daniel M; Atlabet, Mark A; Bourbonnais, Annie; Brandes, Jay; Casciotti, Karen K.L.; Deman, Florian; Dehairs, F.; +25 more
    Publisher: PANGAEA - Data Publisher for Earth & Environmental Science
    Country: Belgium

    The database for nitrate concentrations and nitrate δ15N includes new data and most of the measurements that have been published to date. This database also includes most of the nitrate δ15N measurements in the database of Rafter et al. (2019; Biogeosciences 16, 2617-2633; https://doi.org/10.5194/bg-16-2617-2019). It consists of 944 stations with 15300 measurements of nitrate δ15N. All data are uploaded, except the GOSHIP P2 and P6 sections for which we report average profiles vs. depth. Full data sets for these sections will be included upon publication in a follow-up version. The exact dates for each event are not available for most of the data, thus the starting and end dates (or months) of the cruises are given.Sampling method: CTD/rosette

  • Open Access English
    Authors: 
    Lauvset, Siv Kari; Key, Robert M.; Olsen, Are; van Heuven, Steven; Velo, Antón; Lin, Xiaohua; Schirnick, Carsten; Kozyr, Alex; Tanhua, Toste; Hoppema, Mario; +7 more
    Project: EC | SEADATANET II (283607), NSF | Support for International... (1243377), NSF | Southern Ocean Carbon and... (1425989), NSF | Collaborative Research: C... (0825163), EC | AtlantOS (633211), EC | CARBOCHANGE (264879)

    We present a mapped climatology (GLODAPv2.2016b) of ocean biogeochemical variables based on the new GLODAP version 2 data product (Olsen et al., 2016; Key et al., 2015), which covers all ocean basins over the years 1972 to 2013. The quality-controlled and internally consistent GLODAPv2 was used to create global 1° × 1° mapped climatologies of salinity, temperature, oxygen, nitrate, phosphate, silicate, total dissolved inorganic carbon (TCO2), total alkalinity (TAlk), pH, and CaCO3 saturation states using the Data-Interpolating Variational Analysis (DIVA) mapping method. Improving on maps based on an earlier but similar dataset, GLODAPv1.1, this climatology also covers the Arctic Ocean. Climatologies were created for 33 standard depth surfaces. The conceivably confounding temporal trends in TCO2 and pH due to anthropogenic influence were removed prior to mapping by normalizing these data to the year 2002 using first-order calculations of anthropogenic carbon accumulation rates. We additionally provide maps of accumulated anthropogenic carbon in the year 2002 and of preindustrial TCO2. For all parameters, all data from the full 1972–2013 period were used, including data that did not receive full secondary quality control. The GLODAPv2.2016b global 1° × 1° mapped climatologies, including error fields and ancillary information, are available at the GLODAPv2 web page at the Carbon Dioxide Information Analysis Center (CDIAC; doi:10.3334/CDIAC/OTG.NDP093_GLODAPv2).

  • Other research product . Other ORP type . 2018
    Open Access English
    Authors: 
    Sabine, C. L.; Hankin, S.; Koyuk, H.; Bakker, D. C. E.; Pfeil, B.; Olsen, A.; Metzl, N.; Kozyr, A.; Fassbender, A.; Manke, A.; +66 more
    Publisher: Copernicus Publications
    Project: EC | CARBOCHANGE (264879), NSF | Support for International... (0938349), NSF | Support for the Intergove... (1068958)

    As a response to public demand for a well-documented, quality controlled, publically available, global surface ocean carbon dioxide (CO2) data set, the international marine carbon science community developed the Surface Ocean CO2 Atlas (SOCAT). The first SOCAT product is a collection of 6.3 million quality controlled surface CO2 data from the global oceans and coastal seas, spanning four decades (1968–2007). The SOCAT gridded data presented here is the second data product to come from the SOCAT project. Recognizing that some groups may have trouble working with millions of measurements, the SOCAT gridded product was generated to provide a robust, regularly spaced CO2 fugacity (fCO2) product with minimal spatial and temporal interpolation, which should be easier to work with for many applications. Gridded SOCAT is rich with information that has not been fully explored yet (e.g., regional differences in the seasonal cycles), but also contains biases and limitations that the user needs to recognize and address (e.g., local influences on values in some coastal regions).

  • Open Access English
    Authors: 
    Fisher, Joshua B; Melton, Forrest; Middleton, Elizabeth; Hain, Christopher; Anderson, Martha; Allen, Richard; McCabe, Matthew F; Hook, Simon; Baldocchi, Dennis; Townsend, Philip A; +12 more
    Country: Belgium

    The fate of the terrestrial biosphere is highly uncertain given recent and projected changes in climate. This is especially acute for impacts associated with changes in drought frequency and intensity on the distribution and timing of water availability. The development of effective adaptation strategies for these emerging threats to food and water security are compromised by limitations in our understanding of how natural and managed ecosystems are responding to changing hydrological and climatological regimes. This information gap is exacerbated by insufficient monitoring capabilities from local to global scales. Here, we describe how evapotranspiration (ET) represents the key variable in linking ecosystem functioning, carbon and climate feedbacks, agricultural management, and water resources, and highlight both the outstanding science and applications questions and the actions, especially from a space-based perspective, necessary to advance them.

  • Open Access English
    Authors: 
    Tsiola, Anastasia; Tsagaraki, Tatiana M.; Giannakourou, Antonia; Nikolioudakis, Nikolaos; Yücel, Nebil; Herut, Barak; Pitta, Paraskevi;
    Publisher: Frontiers Media S. A
    Country: Turkey
    Project: EC | MESOAQUA (228224)

    The impact of viral lysis and grazing by flagellates on bacterioplankton production was assessed during a mesocosm experiment in the Eastern Mediterranean Sea, in response to Saharan dust (SD) vs. mixed aerosols (A) addition. The results highlight a positive effect on bacterial abundance, production and growth rate (~1.2, ~2.4, and ~1.9-fold higher than the controls) in both SD and A, which was also confirmed by the increased portion of high DNA content bacteria (up to 48% of the bacterial community). Lytic viral production and the portion of bacterial production lost due to viral lysis were lower in SD and A after dust addition than in the controls (0.33 ± 0.17 × 106 virus-like particles mL-1 h-1 and 6 ± 4%, respectively). Potential ingestion rate of bacteria by flagellates increased upon dust enrichment, but did not differ between mesocosms. Larger predators possibly down regulated flagellate abundance, and the calculated portion of bacterial production lost due to flagellate grazing was probably an artifact. Higher frequency of lysogenic cells in A compared to SD and the controls four days after dust addition may reflect faster phosphorus limitation in A, due to receiving less dissolved inorganic phosphorus and more dissolved inorganic nitrogen than SD. Science Citation Index Expanded WOS: 000457690600057

  • Other research product . Other ORP type . 2011
    Open Access English
    Authors: 
    Ingels, Jeroen;
    Publisher: HERMIONE (Hotspot Ecosystem Research and Man's Impact On European Seas)
    Country: Belgium
    Project: EC | HERMIONE (226354)
  • Open Access English
    Authors: 
    Van Den Eynde, Dries; De Sutter, Renaat; De Smet, Lieven; Francken, Frederic; Haelters, Jan; Maes, Frank; Malfait, Elke; Ozer, José; Polet, Hans; Ponsaer, Stéphanie; +6 more
    Publisher: Belgian Science Policy Office (BELSPO)
    Country: Belgium
  • Open Access English
    Authors: 
    Van Rooij, David; De Mol, Lies; Ingels, Jeroen; Henriet, Jean; Vanreusel, Ann;
    Publisher: HERMIONE (Hotspot Ecosystem Research and Man's Impact On European Seas)
    Country: Belgium
    Project: EC | HERMIONE (226354)
  • Open Access English
    Authors: 
    De Schamphelaere, Karel; Heijerick, Dagobert G; Janssen, Colin;
    Publisher: Universiteit Gent. Onderzoeksgroep Milieutoxicology
    Country: Belgium