GLORIA

GEOMAR Library Ocean Research Information Access

X
feed icon rss

Your email was sent successfully. Check your inbox.

An error occurred while sending the email. Please try again.

Proceed reservation?

Export
Filter
Document type
Keywords
Publisher
Years
  • 11
    facet.materialart.
    Unknown
    Improved Calibration and Data Processing Procedures of OPUS Optical Sensor for High-Resolution in situ Monitoring of Nitrate in Seawater (2021)
    Frontiers
    Details
    Publication Date: 2024-02-07
    Description: Nitrate, an essential nutrient for primary production in natural waters, is optically detectable in the ultraviolet spectral region of 217–240 nm, with no chemical reagents required. Optical nitrate sensors allow monitoring at high temporal and spatial resolutions that are difficult to achieve with traditional approaches involving collection of discrete water samples followed by wet-chemical laboratory analysis. The optical nitrate measurements are however subject to matrix interferences in seawater, including bromide, at the spectral range of interest. Significant progress has been made over the last 10 years in improving data quality for seawater nitrate analysis using the ISUS and SUNA (Seabird Scientific, United States) optical sensors. Standardization of sensor calibration and data processing procedures are important for ensuring comparability of marine nitrate data reported in different studies. Here, we improved the calibration and data processing of the OPUS sensor (TriOS GmbH, Germany), and tested five OPUS sensors simultaneously deployed under identical conditions in the laboratory in terms of inter-sensor similarities and differences. We also improved the sampling interval of the OPUS to 3 s in a continuous mode by a custom-built controller, which facilitates the integration of the sensor into autonomous profiling systems. Real-time, high-resolution, in situ measurements were conducted through (1) underway surface measurements in the southeastern North Sea and (2) depth profiles on a conductivity–temperature–depth frame in the tropical Atlantic Ocean. The nitrate data computed from the optical measurements of the sensor agreed with data from discrete water samples analyzed via conventional wet-chemical methods. This work demonstrates that the OPUS sensor, with improved calibration and data processing procedures, allows in situ quantification of nitrate concentrations in dynamic coastal waters and the open ocean, with an accuracy better than ∼2 μM and short-term precision of 0.4 μM NO 3 – . The OPUS has a unique depth rating of 6,000 m and is a good and cost-effective nitrate sensor for the research community.
    Type: Article , PeerReviewed , info:eu-repo/semantics/article
    Format: text
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    OceanRep: Article in a Scientific Journal - peer-reviewed
  • 12
    facet.materialart.
    Unknown
    At Sea Test 2 deployment cruise : cruise 475 on board R/V Oceanus September 22 – 26, 2011 Woods Hole –Woods Hole, MA (2012)
    Woods Hole Oceanographic Institution
    Details
    Publication Date: 2022-05-25
    Description: The R/V Oceanus, on Cruise 475, carried out the deployment of three moorings for the Coastal and Global Scale Nodes (CGSN) Implementing Organization of the NSF Ocean Observatories Initiative. These three moorings are prototypes of the moorings to be used by CGSN at the Pioneer, Endurance, and Global Arrays. Oceanus departed from Woods Hole, Massachusetts on September 22, 2011 and steamed south to the location of the mooring deployments on the shelf break. Over three days, September 23-25, Oceanus surveyed the bottom at the planned mooring sites, deployed the moorings, and carried out on site verification of the functioning of the moorings and moored hardware. Oceanus returned to Woods Hole on September 26, 2011.
    Description: Funding was provided by the National Science Foundation through the Consortium for Ocean Leadership
    Keywords: Oceanus (Ship : 1975-) Cruise OC475 ; Oceanographic buoys ; Oceanography
    Repository Name: Woods Hole Open Access Server
    Type: Technical Report
    Format: application/pdf
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    PAPER (OA)
  • 13
    facet.materialart.
    Unknown
    Continuous water temperature, salinity and oxygen data in front of GEOMAR Pier, Kiel, Germany (2020-2022) (2023)
    PANGAEA
    Details
    Publication Date: 2023-12-27
    Description: From January 2020 to January 2022, temperature, salinity, and oxygen (only July 2020 - April 2021) data were logged with an AANDERAA oxygen sensor 3835 and a SEABIRD SBE 37-SI MicroCAT CT(D) in 10-minutes intervals at GEOMAR (Kiel, Germany) pier at 54°19'48.8N 10°08'59.6E. The sensor system is mounted to a floating platform such that a continuous depth of 1 m is ensured at any time. Oxygen data were corrected for salinity, temperature and depth following the manual for Aanderaa Optodes using the salinity and temperature measurements from the SEABIRD SBE 37-SI MicroCAT CT(D) sensor. After cleaning and other re-boots of the sensor package, temperature, salinity and oxygen data tend to deviate from true values. Hence, 60 minutes of data after any re-boot (after sensor servicing with re-deployment, data download or power failure) were deleted. Two major data gaps (January 2020 – July 2020, April 2021 – June 2021) are due to longer periods when the sensors were serviced in the workshop.
    Keywords: Corrected; CTD, Sea-Bird, SBE 37-SI MicroCAT; DATE/TIME; DEPTH, water; Kiel Fjord; Kiel-Fjord_GEOMAR-Pier; Monitoring station; MONS; Number; Oxygen; Oxygen, dissolved; Oxygen optode, Aanderaa type 3835; Oxygen saturation; Salinity; Seawater temperature; Temperature, water
    Type: Dataset
    Format: text/tab-separated-values, 362148 data points
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    DATA PANGAEA
  • 14
    facet.materialart.
    Unknown
    Continuous water temperature and salinity data in front of GEOMAR Pier, Kiel, Germany (2022-2023) (2023)
    PANGAEA
    Details
    Publication Date: 2023-12-27
    Description: From January 2022 to May 2023, temperature and salinity (only until March 2023) data were logged with a SEABIRD SBE 37-SMP MicroCAT CT in 2-minutes intervals at GEOMAR (Kiel, Germany) pier at 54°19'48.8N, 10°08'59.6E. The sensor system is mounted to a floating platform to ensure a continuous depth of 1 m at any time. After cleaning and other re-boots of the sensor package, temperature and salinity data tend to deviate from true values. Hence, 60 minutes of data after any re-boot (after sensor servicing with re-deployment, data download or power failure) were deleted. Due to massive fouling the conductivity sensor caused false salinity data during the last two months of this measurement period which were, hence, also deleted from the data set.
    Keywords: CTD, SEA-BIRD SBE 37-SMP MicroCAT; DATE/TIME; DEPTH, water; Kiel Fjord; Kiel-Fjord_GEOMAR-Pier; Monitoring station; MONS; Number; Salinity; Seawater temperature; Temperature, water
    Type: Dataset
    Format: text/tab-separated-values, 568572 data points
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    DATA PANGAEA
  • 15
    facet.materialart.
    Unknown
    Multibeam bathymetry raw data (Kongsberg EM 122 entire dataset) of RV MARIA S. MERIAN during cruise MSM94 (2021)
    PANGAEA
    Details
    Publication Date: 2024-04-20
    Description: Multibeam bathymetry raw data was recorded in the Atlantic during cruise MSM94 that took place between 2020-08-02 and 2020-09-06. The data was collected using the ship's own Kongsberg EM 122. Sound velocity profiles (SVP) were applied on the data for calibration. Please see environmental data (zip file) and the cruise report for details.
    Keywords: Binary Object; Binary Object (File Size); Binary Object (Media Type); DAM_Underway; DAM Underway Research Data; Data file recording distance; Data file recording duration; DATE/TIME; ELEVATION; EM122; EM122 multibeam echosounder; File content; GPF 19-1-104; LATITUDE; LONGITUDE; Maria S. Merian; MSM94; MSM94_0_Underway-3; Multibeam Echosounder; Norwegian Sea; Number of pings; Ship speed; Start of data file, depth; Start of data file, heading; Start of data file recording, date/time; Start of data file recording, latitude; Start of data file recording, longitude; Stop of data file, depth; Stop of data file, heading; Stop of data file recording, date/time; Stop of data file recording, latitude; Stop of data file recording, longitude; Swath bathymetry
    Type: Dataset
    Format: text/tab-separated-values, 15656 data points
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    DATA PANGAEA
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...