bcodmo_dataset_1004881_v1 eng UTF8 dataset service Adam Shepherd BCO-DMO 508-289-2772 266 Woods Hole Rd. MS#36 Woods Hole MA 02543 USA erddap@bco-dmo.org pointOfContact 2026-08-23 ISO 19115-2 Geographic Information - Metadata Part 2 Extensions for Imagery and Gridded Data ISO 19115-2:2009(E) 3 column row vertical [ARTEMIS DNA Metadata] - Niskin bottle metadata and environmental measurements associated with bacterial DNA samples collected from RVIB Nathaniel B. Palmer cruise NBP 22-02 in the Amundsen Sea Embayment from January to March 2022 (NSFGEO-NERC: Collaborative Research: Accelerating Thwaites Ecosystem Impacts for the Southern Ocean (ARTEMIS)) 2026-08-23 creation erddap.bco-dmo.org bcodmo_dataset_1004881_v1 BCO-DMO info@bco-dmo.org https://osprey.bco-dmo.org/dataset/1004881 information web browser Background Information Background information from the source information originator This dataset provides water column environmental data for a study that explored the relationships between glacial meltwater-modified ocean circulation, iron supply, and pelagic bacterial community structure in the Amundsen Sea polynya (ASP), Antarctica. Onboard the RVIB Nathaniel B. Palmer, cruise NBP 22-02, January–March 2022, we examined particle-associated (3-micrometer (µm) polycarbonate pre-filter) and free-living (0.2 µm Durapore filter) bacterial 16S rRNA in seawater from 21 stations (at depths from 2 to 1271 meters (m)) in the context of a suite of ocean observations along the "iron conveyor belt." This key circulation pathway follows Circumpolar Deep Water cascading from the Antarctic Circumpolar Current, along the bottom of the fore-deepened continental shelf toward the deep ice shelf cavity, where it melts the base of the ice shelf, then buoyantly upwells via meltwater entrainment, and delivers iron-rich waters to the surface waters of the polynya. A coastal current also transports this and other meltwater-rich outflows from east to west, and may play an important role in fueling ecosystem production. We were able to sample key water masses: Antarctic Surface Water (AASW), Winter Water (WW), Circumpolar Deep Water (CDW), and modified/mixed variants. Measured environmental parameters in this dataset are CTD variables (temperature, salinity, pressure, dissolved oxygen, beam transmissivity, fluorescence), macronutrients (nitrate, nitrite, ammonium, phosphate), lab chlorophyll a, micronutrient dissolved iron, δ¹⁸O, and calculated meltwater fractions. Results from this dataset, combined with 16S rRNA amplicon data, revealed distinct bacterial communities, characterized by location within the ASP, suggesting community succession along the route. BCO-DMO info@bco-dmo.org https://osprey.bco-dmo.org/dataset/1004881 information web browser Background Information Background information from the source information pointOfContact earth science atmosphere ocean biosphere biology environment theme BCO-DMO project latitude longitude depth theme CF The data may be used and redistributed for free but is not intended for legal use, since it may contain inaccuracies. Neither the data Contributor, ERD, NOAA, nor the United States Government, nor any of their employees or contractors, makes any warranty, express or implied, including warranties of merchantability and fitness for a particular purpose, or assumes any legal liability for the accuracy, completeness, or usefulness, of this information. BCO-DMO largerWorkCitation project eng geoscientificInformation 1 -119.399 -110.086 -74.393 -72.0 -1487.0 -2.0 [ARTEMIS DNA Metadata] - Niskin bottle metadata and environmental measurements associated with bacterial DNA samples collected from RVIB Nathaniel B. Palmer cruise NBP 22-02 in the Amundsen Sea Embayment from January to March 2022 (NSFGEO-NERC: Collaborative Research: Accelerating Thwaites Ecosystem Impacts for the Southern Ocean (ARTEMIS)) 2026-08-23 creation BCO-DMO info@bco-dmo.org https://osprey.bco-dmo.org/dataset/1004881 information web browser Background Information Background information from the source information originator This dataset provides water column environmental data for a study that explored the relationships between glacial meltwater-modified ocean circulation, iron supply, and pelagic bacterial community structure in the Amundsen Sea polynya (ASP), Antarctica. Onboard the RVIB Nathaniel B. Palmer, cruise NBP 22-02, January–March 2022, we examined particle-associated (3-micrometer (µm) polycarbonate pre-filter) and free-living (0.2 µm Durapore filter) bacterial 16S rRNA in seawater from 21 stations (at depths from 2 to 1271 meters (m)) in the context of a suite of ocean observations along the "iron conveyor belt." This key circulation pathway follows Circumpolar Deep Water cascading from the Antarctic Circumpolar Current, along the bottom of the fore-deepened continental shelf toward the deep ice shelf cavity, where it melts the base of the ice shelf, then buoyantly upwells via meltwater entrainment, and delivers iron-rich waters to the surface waters of the polynya. A coastal current also transports this and other meltwater-rich outflows from east to west, and may play an important role in fueling ecosystem production. We were able to sample key water masses: Antarctic Surface Water (AASW), Winter Water (WW), Circumpolar Deep Water (CDW), and modified/mixed variants. Measured environmental parameters in this dataset are CTD variables (temperature, salinity, pressure, dissolved oxygen, beam transmissivity, fluorescence), macronutrients (nitrate, nitrite, ammonium, phosphate), lab chlorophyll a, micronutrient dissolved iron, δ¹⁸O, and calculated meltwater fractions. Results from this dataset, combined with 16S rRNA amplicon data, revealed distinct bacterial communities, characterized by location within the ASP, suggesting community succession along the route. ERDDAP tabledap 1 -119.399 -110.086 -74.393 -72.0 -1487.0 -2.0 tight ERDDAPtabledapDatasetQueryAndAccess https://erddap.bco-dmo.org/erddap/tabledap/bcodmo_dataset_1004881_v1 ERDDAP:tabledap ERDDAP-tabledap ERDDAP's tabledap service (a flavor of OPeNDAP) for tabular (sequence) data. Add different extensions (e.g., .html, .graph, .das, .dds) to the base URL for different purposes. download [ARTEMIS DNA Metadata] - Niskin bottle metadata and environmental measurements associated with bacterial DNA samples collected from RVIB Nathaniel B. Palmer cruise NBP 22-02 in the Amundsen Sea Embayment from January to March 2022 (NSFGEO-NERC: Collaborative Research: Accelerating Thwaites Ecosystem Impacts for the Southern Ocean (ARTEMIS)) 2026-08-23 creation BCO-DMO info@bco-dmo.org https://osprey.bco-dmo.org/dataset/1004881 information web browser Background Information Background information from the source information originator This dataset provides water column environmental data for a study that explored the relationships between glacial meltwater-modified ocean circulation, iron supply, and pelagic bacterial community structure in the Amundsen Sea polynya (ASP), Antarctica. Onboard the RVIB Nathaniel B. Palmer, cruise NBP 22-02, January–March 2022, we examined particle-associated (3-micrometer (µm) polycarbonate pre-filter) and free-living (0.2 µm Durapore filter) bacterial 16S rRNA in seawater from 21 stations (at depths from 2 to 1271 meters (m)) in the context of a suite of ocean observations along the "iron conveyor belt." This key circulation pathway follows Circumpolar Deep Water cascading from the Antarctic Circumpolar Current, along the bottom of the fore-deepened continental shelf toward the deep ice shelf cavity, where it melts the base of the ice shelf, then buoyantly upwells via meltwater entrainment, and delivers iron-rich waters to the surface waters of the polynya. A coastal current also transports this and other meltwater-rich outflows from east to west, and may play an important role in fueling ecosystem production. We were able to sample key water masses: Antarctic Surface Water (AASW), Winter Water (WW), Circumpolar Deep Water (CDW), and modified/mixed variants. Measured environmental parameters in this dataset are CTD variables (temperature, salinity, pressure, dissolved oxygen, beam transmissivity, fluorescence), macronutrients (nitrate, nitrite, ammonium, phosphate), lab chlorophyll a, micronutrient dissolved iron, δ¹⁸O, and calculated meltwater fractions. Results from this dataset, combined with 16S rRNA amplicon data, revealed distinct bacterial communities, characterized by location within the ASP, suggesting community succession along the route. OPeNDAP 1 -119.399 -110.086 -74.393 -72.0 -1487.0 -2.0 tight OPeNDAPDatasetQueryAndAccess https://erddap.bco-dmo.org/erddap/tabledap/bcodmo_dataset_1004881_v1 OPeNDAP:OPeNDAP OPeNDAP An OPeNDAP service for tabular (sequence) data. Add different extensions (e.g., .html, .das, .dds) to the base URL for different purposes. download physicalMeasurement Sample_ID String Sample_id ARTEMIS_ID String Artemis_id Station String Station Event int Event CTD String Ctd NISKIN int Niskin Date String Date VolumeFiltered_L float Volumefiltered_l FilterDiameter_mm int Filterdiameter_mm FilterType String Filtertype FilterPoreSize_um float Filterporesize_um Community String Community DepthThreshold String Depththreshold Watermass String Watermass Location String Location Pressure_db int Pressure_db InsituTemp_C float Insitutemp_c PracticalSalinity float Practicalsalinity PotentialTemp_C float Potentialtemp_c AbsoluteSalinity_g_kg float Absolutesalinity_g_kg Potential_Density_Anomaly_kg_m3 float Potential_density_anomaly_kg_m3 Dissolved_Oxygen_ml_L float Dissolved_oxygen_ml_l Beam_Transmissivity_pcnt float Beam_transmissivity_pcnt In_situ_Fluorescence_mg_m3 float In_situ_fluorescence_mg_m3 Nitrate_umol_L float Nitrate_umol_l Phosphate_umol_L float Phosphate_umol_l Nitrite_umol_L float Nitrite_umol_l Ammonium_umol_L float Ammonium_umol_l Lab_Chlorophyll_a_ug_L float Lab_chlorophyll_a_ug_l Dissolved_Iron_nmol_kg float Dissolved_iron_nmol_kg delO18_ppt float Delo18_ppt Fraction_CDW_pcnt float Fraction_cdw_pcnt Fraction_Sea_Ice_Melt_pcnt float Fraction_sea_ice_melt_pcnt Fraction_Meteoric_pcnt float Fraction_meteoric_pcnt meltwater_fraction_TS_pcnt float Meltwater_fraction_ts_pcnt Meltwater_Fraction_O2S_pcnt float Meltwater_fraction_o2s_pcnt Meltwater_Fraction_O2T_pcnt float Meltwater_fraction_o2t_pcnt Adam Shepherd BCO-DMO 508-289-2772 266 Woods Hole Rd. MS#36 Woods Hole MA 02543 USA erddap@bco-dmo.org distributor OPeNDAP DAP/2.0 https://erddap.bco-dmo.org/erddap/tabledap/bcodmo_dataset_1004881_v1.html order Data Subset Form ERDDAP's version of the OPeNDAP .html web page for this dataset. Specify a subset of the dataset and download the data via OPeNDAP or in many different file types. download https://erddap.bco-dmo.org/erddap/tabledap/bcodmo_dataset_1004881_v1.graph order Make-A-Graph Form ERDDAP's Make-A-Graph .html web page for this dataset. Create an image with a map or graph of a subset of the data. mapDigital This record was created from dataset metadata by ERDDAP Version 2.22