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  • 1
    Online Resource
    Online Resource
    Verbundprojekt PINBAL - Entwicklung eines spectrophotometrischen pH-Messsystems für das Monitoring der Ostsee, Vorhaben: Entwicklung und Aufbau von Demonstratoren : erweiterte Projektzusammenfassung = BONUS PINBAL - Development of a spectrophotometric pH-measurement system for monitoring in the Baltic Sea (2017)
    [Kiel] : [Kongsberg Maritime Contros GmbH]
    Details Availability
    Keywords: Forschungsbericht ; Spektralfotometrie ; Wasserstoffionenkonzentration
    Type of Medium: Online Resource
    Pages: 1 Online-Ressource (11 Seiten, 4,79 MB) , Illustrationen, Diagramm
    URL: https://doi.org/10.2314/GBV:1015049311
    DOI: 10.2314/GBV:1015049311
    Language: German , English
    Note: Förderkennzeichen BMBF 03F0689B. - Verbund-Nummer 01150953 , Unterschiede zwischen dem gedruckten Dokument und der elektronischen Ressource können nicht ausgeschlossen werden , Sprache der Zusammenfassung: Deutsch, Englisch
    Location Call Number Limitation Availability
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    GEOMAR CATALOGUE
    Link to Library Catalog
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  • 2
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    Kiel fjord carbonate chemistry data from discrete water samples in 2015 (2017)
    PANGAEA
    Details
    Publication Date: 2023-03-14
    Description: This dataset is part of a dataset collection. Please read the documentation in Kiel fjord carbonate chemistry data between 2015 (February) and 2016 (January) doi:10.1594/PANGAEA.876551 for details on sampling, measurement and data processing.
    Keywords: Alkalinity, total; Carbon, inorganic, dissolved; Carbon dioxide, partial pressure; CO2S; CO2 Sensor; DATE/TIME; DEPTH, water; interpolated; Kiel Fjord; Kiel-Fjord_GEOMAR; pH; Phosphate; Salinity; Silicate; Temperature, water
    Type: Dataset
    Format: text/tab-separated-values, 232 data points
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 3
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    Kiel fjord carbonate chemistry data between 2015 (February) and 2016 (January) (2017)
    PANGAEA
    In:  GEOMAR - Helmholtz Centre for Ocean Research Kiel
    Details
    Publication Date: 2023-01-13
    Description: A HydroC® CO2 sensor was deployed from a pontoon at the waterfront of the GEOMAR west shore building into Kiel Fjord, Western Baltic Sea (Kiel, Germany; 54°19'48.78"N, 010° 8'59.44"E). Since the pontoon is floating the deployment depth of the sensor was constant at 1m. Data of two deployment intervals are published here: February 2015 – May 2015 and August 2015 – January 2016.
    Keywords: CO2S; CO2 Sensor; Kiel Fjord; Kiel-Fjord_GEOMAR
    Type: Dataset
    Format: application/zip, 3 datasets
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    DATA PANGAEA
  • 4
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    Kiel fjord pCO2 datasets between 2015 (February) and 2016 (January) measured using a HydroC® pCO2 sensor (2017)
    PANGAEA
    Details
    Publication Date: 2023-01-13
    Description: The HydroC® CO2 sensor was deployed from a pontoon at the waterfront of the GEOMAR west shore building into Kiel Fjord, Western Baltic Sea (Kiel, Germany; 54°19'48.78"N, 010° 8'59.44"E). Since the pontoon is floating the deployment depth of the sensor was constant at 1m. Data of two deployment intervals are published here: 1) February 2015 - May 2015 2) August 2015 - January 2016 This dataset is part of a dataset collection. Please read the documentation in Kiel fjord carbonate chemistry data between 2015 (February) and 2016 (January) doi:10.1594/PANGAEA.876551 for details on sampling, measurement and data processing.
    Keywords: Carbon dioxide, partial pressure; CO2S; CO2 Sensor; DATE/TIME; DEPTH, water; HydroC pCO2 sensor, CONTROS; Kiel Fjord; Kiel-Fjord_GEOMAR
    Type: Dataset
    Format: text/tab-separated-values, 605356 data points
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    DATA PANGAEA
  • 5
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    Kiel fjord pCO2 datasets between 2012 (July) and 2015 (January) measured using a HydroC® pCO2 sensor (2016)
    PANGAEA
    In:  GEOMAR - Helmholtz Centre for Ocean Research Kiel
    Details
    Publication Date: 2023-01-13
    Description: The HydroC® CO2 sensor was deployed from a pontoon at the waterfront of the GEOMAR west shore building into Kiel Fjord, Western Baltic Sea (Kiel, Germany; 54°19'48.78"N, 010° 8'59.44"E). Since the pontoon is floating the deployment depth of the sensor was constant at 1m. Data of three deployment intervals are published here: 1) July 2012 - December 2012 2) April 2013 - June 2013 3) November 2013 – January 2015 Data are processed and corrected, for documentation and graphical overview see further details.
    Keywords: Carbon dioxide, partial pressure; CO2S; CO2 Sensor; DATE/TIME; DEPTH, water; HydroC pCO2 sensor, CONTROS; Kiel Fjord; Kiel-Fjord_GEOMAR
    Type: Dataset
    Format: text/tab-separated-values, 23738 data points
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    DATA PANGAEA
  • 6
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    Spatial patterns of Anchoveta (Engraulis ringens) eggs and larvae in relation to p CO 2 in the Peruvian upwelling system (2017)
    Royal Society of London
    In:  Proceedings of the Royal Society B: Biological Sciences, 284 (1855). p. 20170509.
    Details
    Publication Date: 2020-02-06
    Description: Large and productive fisheries occur in regions experiencing or projected to experience ocean acidification. Anchoveta (Engraulis ringens) constitute the world's largest single-species fishery and live in one of the ocean's highest pCO2 regions. We investigated the relationship of the distribution and abundance of Anchoveta eggs and larvae to natural gradients in pCO2 in the Peruvian upwelling system. Eggs and larvae, zooplankton, and data on temperature, salinity, chlorophyll a and pCO2 were collected during a cruise off Peru in 2013. pCO2 ranged from 167-1392 µatm and explained variability in egg presence, an index of spawning habitat. Zooplankton abundance explained variability in the abundance of small larvae. Within the main spawning and larva habitats (6-10°S), eggs were found in cool, low-salinity, and both extremely low (less than 200 µatm) and high (more than 900 µatm) pCO2 waters, and larvae were collected in warmer, higher salinity, and moderate (400-600 µatm) pCO2 waters. Our data support the hypothesis that Anchoveta preferentially spawned at high pCO2 and these eggs had lower survival. Enhanced understanding of the influence of pCO2 on Anchoveta spawning and larva mortality, together with pCO2 measurements, may enable predictions of ocean acidification effects on Anchoveta and inform adaptive fisheries management.
    Type: Article , PeerReviewed
    Format: text
    DOI: 10.1098/rspb.2017.0509
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    OceanRep: Article in a Scientific Journal - peer-reviewed
  • 7
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    Deconstructing methane emissions from a small Northern-European river: Hydrodynamics and temperature as key drivers (2016)
    ACS (American Chemical Society)
    In:  Environmental Science & Technology, 50 (21). pp. 11680-11687.
    Details
    Publication Date: 2019-10-17
    Description: Methane (CH4) emissions from small rivers and streams, particularly via ebullition, are currently under-represented in the literature. Here, we quantify the methane effluxes and drivers in a small, Northern European river. Methane fluxes are comparable to those from tropical aquatic systems, with average emissions of 320 mg CH4 m-2 d-1. Two important drivers of methane flux variations were identified in the studied system: 1) temperature-driven sediment methane ebullition and 2) flow-dependent contribution suspected to be hydraulic exchange with adjacent wetlands and small side-bays. This flow-dependent contribution to river methane loading is shown to be negligible for flows less than 4 m3 s-1, and greater than 50% as flows exceed 7 m3 s-1. While the temperature - ebullition relationship is comparable to other systems, the flow rate dependency has not been previously demonstrated. In general, we found that about 80% of the total emissions were due to methane bubbles. Applying ebullition rates to global estimates for fluvial systems, which currently are not considered, could dramatically increase emission rates to ranges from lakes or wetlands. This work illustrates that small rivers can emit significant methane, and highlights the need for further studies, especially the link between hydrodynamics and connected wetlands.
    Type: Article , PeerReviewed
    Format: text
    DOI: 10.1021/acs.est.6b03268
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    OceanRep: Article in a Scientific Journal - peer-reviewed
  • 8
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    Detection of CO2 leakage from a simulated sub-seabed storage site using three different types of pCO2 sensors (2015)
    Elsevier
    In:  International Journal of Greenhouse Gas Control, 38 . pp. 121-134.
    Details
    Publication Date: 2017-05-23
    Description: Highlights: • Three different types of pCO2 sensors detected sedimentary artificial CO2 leaks in the water column. • Distribution of leaked CO2 in the water column featured high temporal and spatial heterogeneity. • Clear effect of CO2 leakage on the water column was visible only at high flow rates and low tides. • Fast recovery of the water column pCO2 was observed after the CO2 release was stopped. • Multivariate statistics can help to distinguish between anthropogenic and natural CO2 sources. Abstract: This work is focused on results from a recent controlled sub-seabed in situ carbon dioxide (CO2) release experiment carried out during May–October 2012 in Ardmucknish Bay on the Scottish west coast. Three types of pCO2 sensors (fluorescence, NDIR and ISFET-based technologies) were used in combination with multiparameter instruments measuring oxygen, temperature, salinity and currents in the water column at the epicentre of release and further away. It was shown that distribution of seafloor CO2 emissions features high spatial and temporal heterogeneity. The highest pCO2 values (∼1250 μatm) were detected at low tide around a bubble stream and within centimetres distance from the seafloor. Further up in the water column, 30–100 cm above the seabed, the gradients decreased, but continued to indicate elevated pCO2 at the epicentre of release throughout the injection campaign with the peak values between 400 and 740 μatm. High-frequency parallel measurements from two instruments placed within 1 m from each other, relocation of one of the instruments at the release site and 2D horizontal mapping of the release and control sites confirmed a localized impact from CO2 emissions. Observed effects on the water column were temporary and post-injection recovery took 〈7 days. A multivariate statistical approach was used to recognize the periods when the system was dominated by natural forcing with strong correlation between variation in pCO2 and O2, and when it was influenced by purposefully released CO2. Use of a hydrodynamic circulation model, calibrated with in situ data, was crucial to establishing background conditions in this complex and dynamic shallow water system.
    Type: Article , PeerReviewed
    Format: text
    DOI: 10.1016/j.ijggc.2014.10.021
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    OceanRep: Article in a Scientific Journal - peer-reviewed
  • 9
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    Isotopic evidence for biogenic molecular hydrogen production in the Atlantic Ocean (2016)
    Copernicus Publications (EGU)
    In:  Biogeosciences (BG), 13 . pp. 323-340.
    Details
    Publication Date: 2021-04-21
    Description: Oceans are a net source of molecular hydrogen (H2) to the atmosphere. The production of marine H2 is assumed to be mainly biological by N2 fixation, but photochemical pathways are also discussed. We present measurements of mole fraction and isotopic composition of dissolved and atmospheric H2 from the southern and northern Atlantic between 2008 and 2010. In total almost 400 samples were taken during five cruises along a transect between Punta Arenas (Chile) and Bremerhaven (Germany), as well as at the coast of Mauretania. The isotopic source signatures of dissolved H2 extracted from surface water are highly deuterium-depleted and correlate negatively with temperature, showing δD values of (−629 ± 54) ‰ for water temperatures at (27 ± 3) °C and (−249 ± 88) ‰ below (19 ± 1) °C. The results for warmer water masses are consistent with biological production of H2. This is the first time that marine H2 excess has been directly attributed to biological production by isotope measurements. However, the isotope values obtained in the colder water masses indicate that beside possible biological production a significant different source should be considered. The atmospheric measurements show distinct differences between both hemispheres as well as between seasons. Results from the global chemistry transport model TM5 reproduce the measured H2 mole fractions and isotopic composition well. The climatological global oceanic emissions from the GEMS database are in line with our data and previously published flux calculations. The good agreement between measurements and model results demonstrates that both the magnitude and the isotopic signature of the main components of the marine H2 cycle are in general adequately represented in current atmospheric models despite a proposed source different from biological production or a substantial underestimation of nitrogen fixation by several authors.
    Type: Article , PeerReviewed , info:eu-repo/semantics/article
    Format: text
    Format: text
    DOI: 10.5194/bg-13-323-2016
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    OceanRep: Article in a Scientific Journal - peer-reviewed
  • 10
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    Pressure response of Aanderaa and Sea-Bird oxygen optodes (2015)
    AMS (American Meteorological Society)
    In:  Journal of Atmospheric and Oceanic Technology, 32 . pp. 2305-2317.
    Details
    Publication Date: 2020-08-04
    Description: We investigated the effect of hydrostatic pressure of up to 6000 dbar on Aanderaa and Sea-Bird oxygen optodes both in the laboratory and in the field. The overall pressure response is a reduction in the O2 reading by 3 – 4 % per 1000 dbar which is closely linear with pressure and increases with temperature. Closer inspection reveals two superimposed processes with opposite effect: an O2-independent pressure response on the luminophore which increases optode O2 readings and an O2-dependent change in luminescence quenching which decreases optode O2 readings. The latter process dominates and is mainly due to a shift in the equilibrium between sensing membrane and sea water under elevated pressures. If only the dominant O2-dependent process is considered, Aanderaa and Sea-Bird optodes differ in their pressure response. Compensation of the O2-independent process, however, yields a uniform O2 dependence for Aanderaa optodes with standard foil and fast-response foil as well as Sea-Bird optodes. A new scheme to calculate optode O2 from raw data is proposed to account for the two processes. The overall uncertainty of the optode pressure correction amounts to 0.3 % per 1000 dbar, mainly due to variability between sensors.
    Type: Article , PeerReviewed
    Format: text
    DOI: 10.1175/JTECH-D-15-0108.1
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    OceanRep: Article in a Scientific Journal - peer-reviewed
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