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  • image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/
    Authors: Linke, Peter; Haeckel, Matthias;

    Poseidon cruise 518 (leg 1 and 2) took place in the framework of the Horizon 2020 project STEMM-CCS of the EU. The project’s main goal is to develop and test strategies and technologies for the monitoring of subseafloor CO2 storage operations. In this context a small research-scale CO2 gas release experiment is planned for 2019 in the vicinity of the Goldeneye platform located in the British EEZ (central North Sea). Cruise POS518 aimed at collecting necessary oceanographic and biogeochemical baseline data for this release experiment. During Leg 1 ROV PHOCA was used to deploy MPI’s tool for high-precision measurements of O2, CO2 and pH in the bottom water at Goldeneye. In addition, ROV push cores and gravity cores were collected in the area for sediment biogeochemical analyses, and video-CTD casts were conducted to study the water column chemistry. The stereo-camera system and a horizontally looking multibeam echosounder, both, for determining gas bubble emissions at the seafloor were deployed at the Figge Maar blowout crater in the German Bight. Investigations were complemented by hydroacoustic surveys detecting gas bubble leakages at several abandoned wells in the North Sea as well as the Figge Maar. Surface water alkalinity as well as CH4, CO2, and water partial pressures in the air above the sea surface were measured continuously during the cruise. During Leg 2 three different benthic lander systems were deployed to obtain baseline data of oceanographic and biogeochemical parameters for a small research-scale CO2 gas release experiment planned for 2019. The first lander was equipped with an acoustic Doppler current profiler (ADCP), a CTD and an O2 optode. It was deployed for 6 days close to Goldeneye to obtain high resolution data which can be linked to the long-term measurements of the NOC-Lander. This lander is equipped with a suite of sensors to monitor temperature, conductivity, pressure, current speed and direction, hydro-acoustic, pH, pCO2, O2 and nutrients over a period of about 10 months with popup telemetry units for data transmission via IRIDIUM satellite telemetry every 3 months. Two short-term deployments of the Biogeochemical Observatory (BIGO) were conducted to study the molar ratio between oxygen and CO2-fluxes at the seafloor. Sediment cores obtained by gravity and multi corer were collected for sediment biogeochemical analyses and video-CTD casts were used to study the chemistry of the water column.

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    OceanRep
    Report . 2018
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      OceanRep
      Report . 2018
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    Authors: G B J Fader; R O Miller; R C Courtney;
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    Authors: John Shaw; RC Courtney; D Beaver;
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    Authors: Jens Greinert;

    ALKOR cruise AL548 took place as part of the EMFF (European Maritime and Fisheries Fund)-funded project BASTA (Boost Applied munition detection through Smart data inTegration and AI workflows; https://www.basta-munition.eu) and as continuation of the munition monitoring started within the BMBF-funded project UDEMM (Environmental Monitoring for the Delaboration of Munition in the Sea; https://udemm.geomar.de/). In October 2018, a first cruise (POS530 MineMoni2018) was conducted, to gather data for a broad baseline study in the German Baltic Sea. Results show a moderate contamination level on regional and coastal scale, but indicate higher levels for specific local areas. Within UDEMM, expertise was developed to detect, exactly locate and monitor munition (e.g. torpedoes, sea mines, ground mines) on the seafloor using optical and hydroacoustic means. In addition, chemical analyses of dissolved contaminants in the water and sediments was performed. Data acquired during this cruise are used in BASTA, which aims for enhanced munition detection via AUV-based artificial intelligence applied on multi-sensor datasets. At the same time, the project ExPloTect (Ex-situ, near-real-time exPlosive compound deTection in seawater) (also EMFF-funded) addresses the need for an innovative approach to detect explosive compounds in seawater. A prototype system was used and successfully tested for the first time during this cruise. The main focus was placed onto the two already known dumpsites Kolberger Heide and Lübeck Bight. Additionally, new areas Falshöft (Schleswig-Holstein) and Cadet Channel, Trollegrund and Großklützhöved (Mecklenburg-Vorpommern) were explored. In each area high-resolution multibeam mapping was performed and contact lists, indicating potential munition objects were produced on board. AUV surveys were conducted to ground-truth possible contacts via detailed photograph and magnetometer mapping. This was complemented with towed video (TV)-CTD profiles. The transits to and between those sites were planned along former constraint routes during WWII. These routes were main targets of the British Air Force and mines and bombs can be expected along these ways. During transits water samples were taken with on a CTD- (conductivity, temperature, depth) rosette-mounted Niskin bottles in regular distances, in order to obtain a comprehensive understanding munition compounds (inter alia trinitrotoluene (TNT)) measurements across the German Baltic Sea.

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    OceanRep
    Report . 2021
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      Report . 2021
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  • Authors: K. T. Holland; D. Lalejini; K. Plavnick;

    Abstract : Few environmental regions are as dynamic as the littoral, where dramatic changes in winds, waves, and bathymetry can occur over timescales as short as a few hours. A long-term goal for the Littoral Dynamics Team within the Naval Research Laboratory (NRL) is to extract littoral meteorological and oceanographic (METOC) conditions from intelligence, surveillance, and reconnaissance (ISR) imagery collected by either space or airborne platforms in near real time. Our most recent efforts have focused on developing capability to provide actionable battlespace awareness for amphibious operations through the analysis of motion imagery from Small Unmanned Aerial Systems (SUAS). These systems are relatively inexpensive and are widely used within the Department of Defense.

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    Authors: Lemenkova, Polina;

    Technical report. Contribution to the bathymetric mapping of the Antarctic.

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    ZENODO
    Report . 2006
    License: CC BY
    Data sources: ZENODO
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    ZENODO
    Report . 2006
    License: CC BY
    Data sources: Datacite
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      Report . 2006
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      ZENODO
      Report . 2006
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  • Authors: Kevin D. LePage;

    Abstract : The long-term goal is to work closely with the other members of the Seafloor Variability Team to map measures of the variability of the morphological, geoacoustic, and scattering properties of the seafloor into measures of the resulting variability of acoustic time series and reverberation in bottom interacting shallow water environments.

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  • Authors: Curtiss O. Davis;

    Abstract : The objective of this work is to put a hyperspectral imager in space to demonstrate the ability to covertly acquire data on shallow water bathymetry, bottom types, hazards to navigation, water clarity and beach and shore trafficability. The proposed activities are designed to take advantage of the Hyperspectral Imager for the Coastal Ocean (HICO) currently flying on the International Space Station (ISS). As HICO Project Scientist I work to enhance community awareness of the need for and utility of hyperspectral imaging of the coastal ocean. Our work includes advancing methods of on-orbit calibration and product validation, and processing and analyzing hyperspectral data of the coastal ocean. In particular in this study we are using HICO data to characterize the properties of river systems and coastal waters. Conventional ocean color sensors have 1 km pixels and a few spectral channels; these have not proven adequate to resolve the complexity of river systems. HICO was designed to sample the coastal ocean and has 95 m GSD and 88 spectral channels suitable to resolve river systems and other coastal features. To make the best use of this data we are developing algorithms and approaches for resolving the constituents of river plumes, harmful algal blooms and other complex systems.

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    Authors: William W. Chadwick; James G. Moore; Michael O. Garcia; Christopher G. Fox;
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  • Authors: Dellner, Allison;

    The Hawaiian Islands and the Palmyra Atoll were formed by volcanism millions of years ago in the central Pacific Ocean. Though they are similar in origin, each island and the atoll have different shapes and slopes. The purpose of this research project is to determine what causes the differences in slope of the sub- marine portion of the landforms. This study focuses on two factors that effect slope. The age of the islands of Oahu, Maui, Hawaii and the Palmyra atoll is noted as the independent factor, since the age of the landforms give an idea of how long each has been exposed to erosional processes. The shape of the slope is the dependent factor. The deep water current magnitudes were measured along each transect by Acoustic Dopplar Current Profiler as a determinate of how the current affects the slope. A bathymetric profile was also taken in transects by the CHIRP Bathymetric Profiling System in order to record the slopes of each landform. The objective of this project is to examine the correlation between the current magnitude and shape of slope.

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    Authors: Linke, Peter; Haeckel, Matthias;

    Poseidon cruise 518 (leg 1 and 2) took place in the framework of the Horizon 2020 project STEMM-CCS of the EU. The project’s main goal is to develop and test strategies and technologies for the monitoring of subseafloor CO2 storage operations. In this context a small research-scale CO2 gas release experiment is planned for 2019 in the vicinity of the Goldeneye platform located in the British EEZ (central North Sea). Cruise POS518 aimed at collecting necessary oceanographic and biogeochemical baseline data for this release experiment. During Leg 1 ROV PHOCA was used to deploy MPI’s tool for high-precision measurements of O2, CO2 and pH in the bottom water at Goldeneye. In addition, ROV push cores and gravity cores were collected in the area for sediment biogeochemical analyses, and video-CTD casts were conducted to study the water column chemistry. The stereo-camera system and a horizontally looking multibeam echosounder, both, for determining gas bubble emissions at the seafloor were deployed at the Figge Maar blowout crater in the German Bight. Investigations were complemented by hydroacoustic surveys detecting gas bubble leakages at several abandoned wells in the North Sea as well as the Figge Maar. Surface water alkalinity as well as CH4, CO2, and water partial pressures in the air above the sea surface were measured continuously during the cruise. During Leg 2 three different benthic lander systems were deployed to obtain baseline data of oceanographic and biogeochemical parameters for a small research-scale CO2 gas release experiment planned for 2019. The first lander was equipped with an acoustic Doppler current profiler (ADCP), a CTD and an O2 optode. It was deployed for 6 days close to Goldeneye to obtain high resolution data which can be linked to the long-term measurements of the NOC-Lander. This lander is equipped with a suite of sensors to monitor temperature, conductivity, pressure, current speed and direction, hydro-acoustic, pH, pCO2, O2 and nutrients over a period of about 10 months with popup telemetry units for data transmission via IRIDIUM satellite telemetry every 3 months. Two short-term deployments of the Biogeochemical Observatory (BIGO) were conducted to study the molar ratio between oxygen and CO2-fluxes at the seafloor. Sediment cores obtained by gravity and multi corer were collected for sediment biogeochemical analyses and video-CTD casts were used to study the chemistry of the water column.

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    OceanRep
    Report . 2018
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    Authors: G B J Fader; R O Miller; R C Courtney;
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    Authors: John Shaw; RC Courtney; D Beaver;
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    Authors: Jens Greinert;

    ALKOR cruise AL548 took place as part of the EMFF (European Maritime and Fisheries Fund)-funded project BASTA (Boost Applied munition detection through Smart data inTegration and AI workflows; https://www.basta-munition.eu) and as continuation of the munition monitoring started within the BMBF-funded project UDEMM (Environmental Monitoring for the Delaboration of Munition in the Sea; https://udemm.geomar.de/). In October 2018, a first cruise (POS530 MineMoni2018) was conducted, to gather data for a broad baseline study in the German Baltic Sea. Results show a moderate contamination level on regional and coastal scale, but indicate higher levels for specific local areas. Within UDEMM, expertise was developed to detect, exactly locate and monitor munition (e.g. torpedoes, sea mines, ground mines) on the seafloor using optical and hydroacoustic means. In addition, chemical analyses of dissolved contaminants in the water and sediments was performed. Data acquired during this cruise are used in BASTA, which aims for enhanced munition detection via AUV-based artificial intelligence applied on multi-sensor datasets. At the same time, the project ExPloTect (Ex-situ, near-real-time exPlosive compound deTection in seawater) (also EMFF-funded) addresses the need for an innovative approach to detect explosive compounds in seawater. A prototype system was used and successfully tested for the first time during this cruise. The main focus was placed onto the two already known dumpsites Kolberger Heide and Lübeck Bight. Additionally, new areas Falshöft (Schleswig-Holstein) and Cadet Channel, Trollegrund and Großklützhöved (Mecklenburg-Vorpommern) were explored. In each area high-resolution multibeam mapping was performed and contact lists, indicating potential munition objects were produced on board. AUV surveys were conducted to ground-truth possible contacts via detailed photograph and magnetometer mapping. This was complemented with towed video (TV)-CTD profiles. The transits to and between those sites were planned along former constraint routes during WWII. These routes were main targets of the British Air Force and mines and bombs can be expected along these ways. During transits water samples were taken with on a CTD- (conductivity, temperature, depth) rosette-mounted Niskin bottles in regular distances, in order to obtain a comprehensive understanding munition compounds (inter alia trinitrotoluene (TNT)) measurements across the German Baltic Sea.

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    OceanRep
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  • Authors: K. T. Holland; D. Lalejini; K. Plavnick;

    Abstract : Few environmental regions are as dynamic as the littoral, where dramatic changes in winds, waves, and bathymetry can occur over timescales as short as a few hours. A long-term goal for the Littoral Dynamics Team within the Naval Research Laboratory (NRL) is to extract littoral meteorological and oceanographic (METOC) conditions from intelligence, surveillance, and reconnaissance (ISR) imagery collected by either space or airborne platforms in near real time. Our most recent efforts have focused on developing capability to provide actionable battlespace awareness for amphibious operations through the analysis of motion imagery from Small Unmanned Aerial Systems (SUAS). These systems are relatively inexpensive and are widely used within the Department of Defense.

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