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griddap | Subset | tabledap | Make A Graph | wms | files | Accessible | Title | Summary | FGDC | ISO 19115 | Info | Background Info | RSS | Institution | Dataset ID | |
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https://erddap.bco-dmo.org/erddap/tabledap/bcodmo_dataset_963407_v1 | https://erddap.bco-dmo.org/erddap/tabledap/bcodmo_dataset_963407_v1.graph | https://erddap.bco-dmo.org/erddap/files/bcodmo_dataset_963407_v1/ | public | [AE2413 Bacterial productivity] - Bacterial productivity of samples from three stations in the Western North Atlantic aboard R/V Atlantic Explorer cruise AE2413, during May 2024 (Collaborative Research: Pressure effects on microbially-catalyzed organic matter degradation in the deep ocean) | Heterotrophic bacteria and archaea (here: microbes) are critical drivers of the ocean's biogeochemical cycles, active throughout the depth of the ocean. Their capabilities and limitations help determine the rates and locations at which carbon and nutrients are regenerated, as well as the extent to which organic matter is preserved (Hedges 1992). In the deep ocean, at bathy- and abyssopelagic depths (ca. 1000-6000m), these communities are dependent upon the sinking flux of particulate organic matter (POM) from the surface ocean (Bergauer et al. 2018). This dependence means that heterotrophic microbial communities must produce the extracellular enzymes required to solubilize and hydrolyze high molecular weight (HMW) POM to sizes substrates suitable for cellular uptake. A recent global-scale investigation of deep-sea microbes in fact found that the genetic potential for exported (extracellular) enzymes among bacteria in deep waters was far greater than for communities in surface or mesopelagic waters (Zhao et al. 2020). We have new evidence that a substantial fraction of bacteria in bottom water from the North Atlantic Ocean use a specialized set of extracellular enzymes to rapidly take up HMW polysaccharides (Giljan et al. 2021), a substrate processing mechanism that would not be detected with the low molecular weight substrates used in most prior studies of microbial activity in the deep ocean (Nagata et al. 2010).\n \nThrough our collaboration with the Danish Center for Hadal Research, we were able to use pressurization systems and in situ specialized equipment to investigate the effects of pressures characteristic of bathy- and abyssopelagic depths on microbial communities and their extracellular enzymes in the open North Atlantic Ocean. \n \nHere we present the measurement of 3H-leucine incorporation by heterotrophic bacteria using a cold trichloroacetic acid (TCA) and microcentrifuge extraction method (Kirchman, 2001) at different sites in the Western North Atlantic aboard R/V Atlantic Explorer during during the research cruise AE2413 (2024-05-09 to 2024-05-28). All work and incubations were performed in a UNOLS isotope lab, or within designated areas at the University of North Carolina at Chapel HIll post cruise. This dataset contains collection metadata, environmental conditions, sample types and treatments, incubation conditions, substrate types, radioactivity measurements, and calculated incorporation rates of 3H-leucine.\n\ncdm_data_type = Other\nVARIABLES:\ndeployment (unitless)\n... (24 more variables)\n | https://erddap.bco-dmo.org/erddap/metadata/fgdc/xml/bcodmo_dataset_963407_v1_fgdc.xml | https://erddap.bco-dmo.org/erddap/metadata/iso19115/xml/bcodmo_dataset_963407_v1_iso19115.xml | https://erddap.bco-dmo.org/erddap/info/bcodmo_dataset_963407_v1/index.htmlTable | https://osprey.bco-dmo.org/dataset/963407![]() | https://erddap.bco-dmo.org/erddap/rss/bcodmo_dataset_963407_v1.rss | https://erddap.bco-dmo.org/erddap/subscriptions/add.html?datasetID=bcodmo_dataset_963407_v1&showErrors=false&email= | BCO-DMO | bcodmo_dataset_963407_v1 | |||
log in | [AMT-30 iodine: incubations] - Iodine incubation data collected from RRS Discovery cruise AMT-30 during February 23 - March 27th, 2023 (Collaborative Research: Experimental constraints on the rates and mechanisms of iodine redox transformations in seawater) | This dataset includes the incubation data described in the following study abstract (see \"Related Datasets\" for more data from this study):\n\nThe oxidized iodine species, iodate, is abundant in well-oxygenated marine waters and can be tracked in sediments to reconstruct ancient oxygen availability. Despite known modern marine spatial variations in both iodate and reduced iodide, the rates, pathways, and locations of iodate formation remain poorly understood for temporal gradients across Earth history. To quantify rates and pathways of iodate formation across an ocean basin, we performed ship-board tracer experiments in euphotic waters with known gradients in iodine speciation on an Atlantic Meridional Transect (45°S and 37°N). We performed incubations at depths corresponding to 7% and 1% of ambient surface light levels, thus tracking the boundaries of the deep chlorophyl maximum (DCM), from 11 stations along the transect. All incubations were spiked with a 129I (t1/2 ~15.7 My) tracer and mimicked ambient conditions. We observed iodate production via multiple pathways. The most common observation was a lack of significant iodate production, with iodate production limited to 7 of the 22 locations and nearly exclusively observed at the DCM and outside the nitrogen and iron limited South Atlantic Gyre. Iodate formation from direct iodide oxidation is inferred in only two locations based on increases in iodate 129I/127I ratios. At the other locations, decreases in iodate 129I/127I ratios imply that rapid reactions with and overturning of alternative natural iodine pools, likely iodine intermediates, are an important factor for iodate production. Our work emphasizes that the rates and pathways of iodate production are spatially heterogenous in the Atlantic Ocean. Future work is needed to determine the drivers, temporal variations, and trends within global ocean basins.\n\ncdm_data_type = Other\nVARIABLES:\nsample_ID (unitless)\nstation_number (unitless)\nlatitude (degrees_north)\nlongitude (degrees_east)\nlight_percent (percent (%))\nincubation_time (unitless)\n... (13 more variables)\n | BCO-DMO | bcodmo_dataset_970249_v1 | ||||||||||||
https://erddap.bco-dmo.org/erddap/tabledap/bcodmo_dataset_948396_v1 | https://erddap.bco-dmo.org/erddap/tabledap/bcodmo_dataset_948396_v1.graph | https://erddap.bco-dmo.org/erddap/files/bcodmo_dataset_948396_v1/ | public | [CliOMZ Dark DIC fixation rates] - Dark DIC Fixation Rates collected from CliOMZ AT50-10 in the Eastern Pacific Ocean from May to June 2023 (CliOMZ project) (Collaborative Research: Underexplored Connections between Nitrogen and Trace Metal Cycling in Oxygen Minimum Zones Mediated by Metalloenzyme Inventories) | These data include dark dissolved inorganic carbon (DIC) fixation rates measured on R/V Atlantis (CliOMZ AT50-10 expedition) from Golfito, Costa Rica to San Diego, USA in May-June 2023. We aimed at quantifying dark DIC fixation rates associated with nitrification by specifically inhibiting ammonia-oxidizing microorganisms. Instruments used were a CTD profiler and a scintillation counter (Perkin-Elmer Tri-Carb 2910 TR).\n\ncdm_data_type = Other\nVARIABLES:\nCruise (unitless)\nDate (unitless)\nlongitude (Latitude, degrees_east)\nlatitude (Longitude, degrees_north)\nStation (unitless)\ndepth (m)\nTreatment (unitless)\nDIC_fixation (nanomoles per liter per day (nmol/L/d))\nIncubation_time (hours (h))\nDIC_conc (micromoles per liter (umol/L))\n | https://erddap.bco-dmo.org/erddap/metadata/fgdc/xml/bcodmo_dataset_948396_v1_fgdc.xml | https://erddap.bco-dmo.org/erddap/metadata/iso19115/xml/bcodmo_dataset_948396_v1_iso19115.xml | https://erddap.bco-dmo.org/erddap/info/bcodmo_dataset_948396_v1/index.htmlTable | https://www.bco-dmo.org/dataset/948396![]() | https://erddap.bco-dmo.org/erddap/rss/bcodmo_dataset_948396_v1.rss | https://erddap.bco-dmo.org/erddap/subscriptions/add.html?datasetID=bcodmo_dataset_948396_v1&showErrors=false&email= | BCO-DMO | bcodmo_dataset_948396_v1 | |||
https://erddap.bco-dmo.org/erddap/tabledap/bcodmo_dataset_948396_v2 | https://erddap.bco-dmo.org/erddap/tabledap/bcodmo_dataset_948396_v2.graph | https://erddap.bco-dmo.org/erddap/files/bcodmo_dataset_948396_v2/ | public | [CliOMZ Dark DIC fixation rates] - Dark DIC Fixation Rates collected from CliOMZ AT50-10 in the Eastern Pacific Ocean from May to June 2023 (CliOMZ project) (Collaborative Research: Underexplored Connections between Nitrogen and Trace Metal Cycling in Oxygen Minimum Zones Mediated by Metalloenzyme Inventories) | These data include dark dissolved inorganic carbon (DIC) fixation rates measured on R/V Atlantis (CliOMZ AT50-10 expedition) from Golfito, Costa Rica to San Diego, USA in May-June 2023. We aimed at quantifying dark DIC fixation rates associated with nitrification by specifically inhibiting ammonia-oxidizing microorganisms. Instruments used were a CTD profiler and a scintillation counter (Perkin-Elmer Tri-Carb 2910 TR).\n\ncdm_data_type = Other\nVARIABLES:\nCruise (unitless)\nDate (unitless)\nlongitude (Latitude, degrees_east)\nlatitude (Longitude, degrees_north)\nStation (unitless)\ndepth (m)\nTreatment (unitless)\nDIC_fixation (nanomoles per liter per day (nmol/L/d))\nIncubation_time (hours (h))\nDIC_conc (micromoles per liter (umol/L))\n | https://erddap.bco-dmo.org/erddap/metadata/fgdc/xml/bcodmo_dataset_948396_v2_fgdc.xml | https://erddap.bco-dmo.org/erddap/metadata/iso19115/xml/bcodmo_dataset_948396_v2_iso19115.xml | https://erddap.bco-dmo.org/erddap/info/bcodmo_dataset_948396_v2/index.htmlTable | https://osprey.bco-dmo.org/dataset/948396![]() | https://erddap.bco-dmo.org/erddap/rss/bcodmo_dataset_948396_v2.rss | https://erddap.bco-dmo.org/erddap/subscriptions/add.html?datasetID=bcodmo_dataset_948396_v2&showErrors=false&email= | BCO-DMO | bcodmo_dataset_948396_v2 | |||
log in | [CliOMZ Dark DIC fixation rates] - Dark DIC Fixation Rates collected from CliOMZ AT50-10 in the Eastern Pacific Ocean from May to June 2023 (CliOMZ project) (Collaborative Research: Underexplored Connections between Nitrogen and Trace Metal Cycling in Oxygen Minimum Zones Mediated by Metalloenzyme Inventories) | These data include dark dissolved inorganic carbon (DIC) fixation rates measured on R/V Atlantis (CliOMZ AT50-10 expedition) from Golfito, Costa Rica to San Diego, USA in May-June 2023. We aimed at quantifying dark DIC fixation rates associated with nitrification by specifically inhibiting ammonia-oxidizing microorganisms. Instruments used were a CTD profiler and a scintillation counter (Perkin-Elmer Tri-Carb 2910 TR).\n\ncdm_data_type = Other\nVARIABLES:\nCruise (unitless)\nDate (unitless)\nlongitude (Latitude, degrees_east)\nlatitude (Longitude, degrees_north)\nStation (unitless)\ndepth (m)\nTreatment (unitless)\nDIC_fixation (nanomoles per liter per day (nmol/L/d))\nIncubation_time (hours (h))\nDIC_conc (micromoles per liter (umol/L))\n | BCO-DMO | bcodmo_dataset_948396_v3 | ||||||||||||
log in | [CliOMZ Dark DIC fixation rates] - Dark DIC Fixation Rates collected from CliOMZ AT50-10 in the Eastern Pacific Ocean from May to June 2023 (CliOMZ project) (Collaborative Research: Underexplored Connections between Nitrogen and Trace Metal Cycling in Oxygen Minimum Zones Mediated by Metalloenzyme Inventories) | These data include dark dissolved inorganic carbon (DIC) fixation rates measured on R/V Atlantis (CliOMZ AT50-10 expedition) from Golfito, Costa Rica to San Diego, USA in May-June 2023. We aimed at quantifying dark DIC fixation rates associated with nitrification by specifically inhibiting ammonia-oxidizing microorganisms. Instruments used were a CTD profiler and a scintillation counter (Perkin-Elmer Tri-Carb 2910 TR).\n\ncdm_data_type = Other\nVARIABLES:\nCruise (unitless)\nDate (unitless)\nlatitude (degrees_north)\nlongitude (degrees_east)\nStation (unitless)\nCast (unitless)\ndepth (m)\nTreatment (unitless)\nDIC_fixation (nanomoles per liter per day (nmol/L/d))\nIncubation_time (hours (h))\nDIC_conc (micromoles per liter (umol/L))\n | BCO-DMO | bcodmo_dataset_948396_v4 | ||||||||||||
https://erddap.bco-dmo.org/erddap/tabledap/bcodmo_dataset_948411_v1 | https://erddap.bco-dmo.org/erddap/tabledap/bcodmo_dataset_948411_v1.graph | https://erddap.bco-dmo.org/erddap/files/bcodmo_dataset_948411_v1/ | public | [CliOMZ Heterotrophic production rates] - Heterotrophic Production Rates collected from CliOMZ AT50-10 in the Eastern Pacific Ocean from May to June 2023 (CliOMZ project) (Collaborative Research: Underexplored Connections between Nitrogen and Trace Metal Cycling in Oxygen Minimum Zones Mediated by Metalloenzyme Inventories) | These data include heterotrophic production rates measured on R/V Atlantis (CliOMZ AT50-10 expedition) from Golfito, Costa Rica to San Diego, USA in May-June 2023. We aimed at comparing heterotrophic and chemoautotrophic microbial activities at the selected study sites. Instruments used were a CTD profiler and a scintillation counter (Perkin-Elmer Tri-Carb 2910 TR).\n\ncdm_data_type = Other\nVARIABLES:\nCruise (unitless)\nDate (unitless)\nlatitude (degrees_north)\nlongitude (degrees_east)\nStation (unitless)\nCast (unitless)\ndepth (m)\nHet_production (nanomoles carbon per liter per day (nmol C/L/d))\nTreatment (unitless)\nIncubation_time (hours (h))\n | https://erddap.bco-dmo.org/erddap/metadata/fgdc/xml/bcodmo_dataset_948411_v1_fgdc.xml | https://erddap.bco-dmo.org/erddap/metadata/iso19115/xml/bcodmo_dataset_948411_v1_iso19115.xml | https://erddap.bco-dmo.org/erddap/info/bcodmo_dataset_948411_v1/index.htmlTable | https://www.bco-dmo.org/dataset/948411![]() | https://erddap.bco-dmo.org/erddap/rss/bcodmo_dataset_948411_v1.rss | https://erddap.bco-dmo.org/erddap/subscriptions/add.html?datasetID=bcodmo_dataset_948411_v1&showErrors=false&email= | BCO-DMO | bcodmo_dataset_948411_v1 | |||
log in | [Fourier transform infrared spectroscopy data] - Photodegradation of macroplastics in the marine environment: fourier transform infrared spectroscopy (EAGER: Collaborative Research: NSF2026: Is Plastic Degradation Occurring in the Deep Ocean Water Column?) | The photodegradation of macroplastics in the marine environment remains poorly understood. Here, we investigated the weathering of commercially available plastics (tabs 1.3 × 4.4 × 0.16 cm), including high-density polyethylene, low-density polyethylene, polypropylene, polystyrene, and polycarbonate, in seawater under laboratory-simulated ultraviolet A radiation for 3–9 months, equivalent to 25–75 years of natural sunlight exposure without considering other confounding factors. After the exposure, the physical integrity and thermal stability of the tabs remained relatively intact, suggesting that the bulk polymer chains were not severely altered despite strong irradiation, likely due to their low specific surface area. In contrast, the surface layer (∼1 μm) of the tabs was highly oxidized and eroded after 9 months of accelerated weathering. Several antioxidant additives were identified in the plastics through low temperature pyrolysis coupled with gas chromatography/mass spectrometry (Pyr-GC/MS) analysis. The Pyr-GC/MS results also revealed many new oxygen-containing compounds formed during photodegradation, and these compounds indicated the dominance of chain scission reactions during weathering. These findings highlight the strong resistance of industrial macroplastics to weathering, emphasizing the need for a broader range of plastics with varying properties and sizes to accurately estimate plastic degradation in the marine environment.\n\ncdm_data_type = Other\nVARIABLES:\nPolymer_name (unitless)\nPolymer_acronym (unitless)\nIncubation_time (unitless)\nUnit_of_incubation_time (unitless)\nReplicate (unitless)\nvinyl_index (unitless)\nketone_index (unitless)\nether_index (unitless)\nalcohol_index (unitless)\nOxidation_index (unitless)\n | BCO-DMO | bcodmo_dataset_957950_v1 | ||||||||||||
https://erddap.bco-dmo.org/erddap/tabledap/bcodmo_dataset_489471.subset | https://erddap.bco-dmo.org/erddap/tabledap/bcodmo_dataset_489471 | https://erddap.bco-dmo.org/erddap/tabledap/bcodmo_dataset_489471.graph | https://erddap.bco-dmo.org/erddap/files/bcodmo_dataset_489471/ | public | [pteropod shell dissolution] - Pteropod shell dissolution in natural and high-CO2 environments from samples collected on RRS James Clark Ross cruise JR177 in the Scotia Sea, Southern Ocean from 2007-2008 (An Investigation of the Role of Nutrition in the Coral Calcification Response to Ocean Acidification) | This dataset contains data from a study of pteropod shell dissolution on individuals exposed to CO2-enriched seawater. The data include the amount of dissolution as well as the physical and chemical parameters on which carbonate chemistry parameters were calculated.\n\ncdm_data_type = Other\nVARIABLES:\ntreatment (dimensionless)\nincubation_time (days)\nN (dimensionless)\nspecies (dimensionless)\nsal (dimensionless)\ntemp (Temperature, degrees Celsius)\nphosphate (Mass Concentration Of Phosphate In Sea Water, micromoles per kilogram (umol/kg))\nsilicate (Mass Concentration Of Silicate In Sea Water, micromoles per kilogram (umol/kg))\nalk_tot (micromoles per kilogram (umol/kg))\nalk_tot_stdev (micromoles per kilogram (umol/kg))\nDIC (micromoles per kilogram (umol/kg))\nDIC_stdev (micromoles per kilogram (umol/kg))\npH (Sea Water Ph Reported On Total Scale, dimensionless)\npH_stdev (P H Stdev, dimensionless)\npCO2 (P CO2, microatmospheres (uatm))\npCO2_stdev (P CO2 Stdev, microatmospheres (uatm))\nbicarbonate (micromoles per kilogram (umol/kg))\nbicarbonate_stdev (micromoles per kilogram (umol/kg))\ncarbonate (micromoles per kilogram (umol/kg))\ncarbonate_stdev (micromoles per kilogram (umol/kg))\nomega_Arg (dimensionless)\nomega_Arg_stdev (dimensionless)\nnon_diss (percentage (%))\nnon_diss_stdev (percentage (%))\ndiss_rate1 (percentage (%))\n... (5 more variables)\n | https://erddap.bco-dmo.org/erddap/info/bcodmo_dataset_489471/index.htmlTable | https://www.bco-dmo.org/dataset/489471![]() | https://erddap.bco-dmo.org/erddap/rss/bcodmo_dataset_489471.rss | https://erddap.bco-dmo.org/erddap/subscriptions/add.html?datasetID=bcodmo_dataset_489471&showErrors=false&email= | BCO-DMO | bcodmo_dataset_489471 | ||||
log in | [Pyrolysis-GC/MS grouped compound information] - Photodegradation of macroplastics in the marine environment: Pyrolysis-GC/MS grouped compound information (EAGER: Collaborative Research: NSF2026: Is Plastic Degradation Occurring in the Deep Ocean Water Column?) | The photodegradation of macroplastics in the marine environment remains poorly understood. Here, we investigated the weathering of commercially available plastics (tabs 1.3 × 4.4 × 0.16 cm), including high-density polyethylene, low-density polyethylene, polypropylene, polystyrene, and polycarbonate, in seawater under laboratory-simulated ultraviolet A radiation for 3–9 months, equivalent to 25–75 years of natural sunlight exposure without considering other confounding factors. After the exposure, the physical integrity and thermal stability of the tabs remained relatively intact, suggesting that the bulk polymer chains were not severely altered despite strong irradiation, likely due to their low specific surface area. In contrast, the surface layer (∼1 μm) of the tabs was highly oxidized and eroded after 9 months of accelerated weathering. Several antioxidant additives were identified in the plastics through low temperature pyrolysis coupled with gas chromatography/mass spectrometry (Pyr-GC/MS) analysis. The Pyr-GC/MS results also revealed many new oxygen-containing compounds formed during photodegradation, and these compounds indicated the dominance of chain scission reactions during weathering. These findings highlight the strong resistance of industrial macroplastics to weathering, emphasizing the need for a broader range of plastics with varying properties and sizes to accurately estimate plastic degradation in the marine environment.\n\ncdm_data_type = Other\nVARIABLES:\nPolymer_name (unitless)\nPolymer_acronym (unitless)\nIncubation_time (unitless)\nUnit_of_incubation_time (unitless)\nReplicate (unitless)\nalkene_intensity (unitless)\nalkane_intensity (unitless)\nketone_intensity (unitless)\nalcohol_intensity (unitless)\naromatic_intensity (unitless)\nphenol_intensity (unitless)\nheterocyclic_intensity (unitless)\n... (5 more variables)\n | BCO-DMO | bcodmo_dataset_943291_v1 | ||||||||||||
log in | [Thermalgravimetric analysis] - Photodegradation of macroplastics in the marine environment: Thermalgravimetric analysis (EAGER: Collaborative Research: NSF2026: Is Plastic Degradation Occurring in the Deep Ocean Water Column?) | The photodegradation of macroplastics in the marine environment remains poorly understood. Here, we investigated the weathering of commercially available plastics (tabs 1.3 × 4.4 × 0.16 cm), including high-density polyethylene, low-density polyethylene, polypropylene, polystyrene, and polycarbonate, in seawater under laboratory-simulated ultraviolet A radiation for 3–9 months, equivalent to 25–75 years of natural sunlight exposure without considering other confounding factors. After the exposure, the physical integrity and thermal stability of the tabs remained relatively intact, suggesting that the bulk polymer chains were not severely altered despite strong irradiation, likely due to their low specific surface area. In contrast, the surface layer (∼1 μm) of the tabs was highly oxidized and eroded after 9 months of accelerated weathering. Several antioxidant additives were identified in the plastics through low temperature pyrolysis coupled with gas chromatography/mass spectrometry (Pyr-GC/MS) analysis. The Pyr-GC/MS results also revealed many new oxygen-containing compounds formed during photodegradation, and these compounds indicated the dominance of chain scission reactions during weathering. These findings highlight the strong resistance of industrial macroplastics to weathering, emphasizing the need for a broader range of plastics with varying properties and sizes to accurately estimate plastic degradation in the marine environment.\n\ncdm_data_type = Other\nVARIABLES:\nPolymer_name (unitless)\nPolymer_acronym (unitless)\nIncubation_time (units)\nUnit_of_incubation_time (unitless)\nReplicate (unitless)\nOnset_Temperature (decimal degrees (°C))\nMax_Temperature (decimal degrees (°C))\nUnit_of_Temperature (unitless)\n | BCO-DMO | bcodmo_dataset_946726_v1 |