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log in [EXPORTS NA nuts and TM field data] - Dissolved trace metal and macronutrient concentrations rom field samples collected during the EXPORTS North Atlantic campaign at the Porcupine Abyssal Plain-Sustained Observatory (PAP-SO) site on board the RRS Discovery (DY131) in May 2021 (Collaborative Research: Diatoms, Food Webs and Carbon Export - Leveraging NASA EXPORTS to Test the Role of Diatom Physiology in the Biological Carbon Pump) This dataset includes dissolved trace metal (manganese, iron, cobalt, nickel, copper, cadmium, zinc, lead) and macronutrient (nitrate+nitrite, phosphate, silicic acid, nitrite) concentration data from field samples collected during the EXPORTS North Atlantic campaign at the Porcupine Abyssal Plain-Sustained Observatory (PAP-SO) site on board the RRS Discovery (DY131). These data were primarily collected opportunistically during the course of water collection for incubation experiments (see separate dataset for incubations), and provide field context for the shipboard incubation experiments as well as temporal characterization of a retentive anticyclonic eddy occupied over the course of the cruise.\n\nThis research focuses on the vertical export of the carbon associated with a major group of phytoplankton, the diatoms in the North Atlantic near the Porcupine Abyssal Plain. The major objective is to understand how diatom community composition and the prevailing nutrient conditions create taxonomic differences in metabolic state that combine to direct diatom taxa to different carbon export pathways. The focus is on diatoms, given their large contribution to global marine primary productivity and carbon export which translates into a significant contribution to the biogeochemical cycling of carbon (C), nitrogen (N), phosphorus (P), iron (Fe) and silicon (Si). It is hypothesized that the type and degree of diatom physiological stress are vital aspects of ecosystem state that drive export. To test this hypothesis, combined investigator expertise in phytoplankton physiology, genomics, and trace element chemistry is used to assess the rates of nutrient use and the genetic composition and response of diatom communities, with measurements of silicon and iron stress to evaluate stress as a predictor of the path of diatom carbon export. The EXPORTS field campaign in the North Atlantic sampled a retentive eddy over nearly a month in May 2021, which coincided with the decline of the North Atlantic Spring Bloom.\n\ncdm_data_type = Other\nVARIABLES:\nCRUISE_ID (unitless)\nEVTNBR (unitless)\nDATE_UTC (unitless)\nTIME_UTC (unitless)\ntime (Iso_datetime_utc, seconds since 1970-01-01T00:00:00Z)\n... (90 more variables)\n BCO-DMO bcodmo_dataset_954941_v1
log in [FeOA Incubation trace metals and pH] - Dissolved trace metal concentrations, nickel speciation, and pH in shipboard incubations conducted on FeOA project cruise SKQ202209S on the R/V Sikuliaq between June 4 2022 to July 1 2022 in the NE Pacific. (Collaborative Research: The Effect of Ocean Acidification on Fe Availability to Phytoplankton in Coastal and Oceanic Waters of the Eastern North Pacific) This dataset includes the concentrations of total dissolved trace metals (manganese, iron, added iron-57, nickel, copper, zinc), of labile dissolved nickel, and pH measured in samples collected from phytoplankton shipboard incubation experiments conducted on the FeOA cruise SKQ202209S on R/V Sikuliaq in the NE Pacific from June to July 2022. \nThis project investigates the effects of ocean acidification on the associations between iron and organic ligands in seawater and on iron bioavailability to marine phytoplankton communities. The project used a combination of shipboard incubation experiments and depth profiles to characterize iron speciation and cycling across coastal upwelling, oligotrophic open ocean, and iron-limited subarctic oceanographic regimes in the NE Pacific. Surface seawater was incubated at pH of 8.1, 7.6, and 7.1 with natural iron and with dissolved iron amendments in order to investigate interactions between pH and iron bioavailability across the different regimes. Understanding how pH influences iron and its relationship with ligands provides important information for assessing the impacts of ocean acidification on primary production and biogeochemical processes.\n\ncdm_data_type = Other\nVARIABLES:\nFeOA_NBR (unitless)\nEVTNBR (unitless)\nDATE_SHIP (unitless)\nTIMESTART_SHIP (unitless)\nTIMESTOP_SHIP (unitless)\nlatitude (degrees_north)\nlongitude (degrees_east)\nPLATFORM (unitless)\nSTNNBR (unitless)\nINCNBR (unitless)\nINCDAY (unitless)\nINCTREATMENT (unitless)\nBTLNBR_INC (unitless)\nINCLABEL (unitless)\npH (unitless)\n... (23 more variables)\n BCO-DMO bcodmo_dataset_957607_v1
log in [STING Endmember Metals] - Dissolved trace metal concentrations from submarine groundwater wells, rivers and estuaries sampled along the West Florida Shelf for the STING project between November 2022 and March 2024 (Collaborative Research: Linking iron and nitrogen sources in an oligotrophic coastal margin: Nitrogen fixation and the role of boundary fluxes) Concentrations of dissolved trace metals (Al, Mn, Fe, Co, Ni, Cu, Zn, Mo, Cd, Ba, Lu, Pb) from submarine groundwater wells and overlying water column, and from rivers and estuaries sampled along the West Florida Shelf.\n\nThis project investigates how groundwater discharge delivers important nutrients to the coastal ecosystems of the West Florida Shelf. Preliminary studies had indicated that groundwater may supply both dissolved organic nitrogen (DON) and iron in this region. In coastal ecosystems like the West Florida Shelf that have very low nitrate and ammonium concentrations, DON is the main form of nitrogen available to organisms. Nitrogen cycling is strongly affected by iron availability because iron is essential for both photosynthesis and for nitrogen fixation. This study investigated the sources and composition of DON and iron, and their influence on the coastal ecosystem. The team sampled offshore groundwater wells, river and estuarine waters from shore, and conducted two expeditions across the West Florida Shelf in winter and summer for surface and depth profile sampling and for shipboard incubation experiments.\n\ncdm_data_type = Other\nVARIABLES:\nSTING_ID (unitless)\nCRUISE_ID (unitless)\ntime (Datetime_utc, seconds since 1970-01-01T00:00:00Z)\nDATETIME_LOCAL_ET (unitless)\nDATE_LOCAL (unitless)\nTIME_LOCAL (unitless)\nTIME_ZONE (unitless)\nlatitude (degrees_north)\nlongitude (degrees_east)\nSTN (unitless)\nSAMPLE_ID (unitless)\nSAMPLE_DESC (unitless)\nSITE_TYPE (unitless)\nPLATFORM (unitless)\n... (56 more variables)\n BCO-DMO bcodmo_dataset_997829_v1
log in [STING I Dissolved Soluble Trace Metals] - Concentrations of soluble and dissolved trace metals in water column samples and incubation experiments from STING I cruise AE2305 on R/V Atlantic Explorer over the West Florida Shelf from February to March 2023 (Collaborative Research: Linking iron and nitrogen sources in an oligotrophic coastal margin: Nitrogen fixation and the role of boundary fluxes) This dataset includes concentrations of soluble and dissolved trace metals (Al, Sc, Mn, Fe, Co, Ni, Cu, Zn, Cd, Gd, Lu, Pb) from phytoplankton shipboard incubation experiments and water column samples collected on STING I cruise AE2305 on R/V Atlantic Explorer over the West Florida Shelf from February to March 2023.\n\nThis project investigates how groundwater discharge delivers important nutrients to the coastal ecosystems of the West Florida Shelf. Preliminary studies had indicated that groundwater may supply both dissolved organic nitrogen (DON) and iron in this region. In coastal ecosystems like the West Florida Shelf that have very low nitrate and ammonium concentrations, DON is the main form of nitrogen available to organisms. Nitrogen cycling is strongly affected by iron availability because iron is essential for both photosynthesis and for nitrogen fixation. This study investigated the sources and composition of DON and iron, and their influence on the coastal ecosystem. The team sampled offshore groundwater wells, river and estuarine waters from shore, and conducted two expeditions across the West Florida Shelf in winter and summer for surface and depth profile sampling and for shipboard incubation experiments.\n\ncdm_data_type = Other\nVARIABLES:\nSTING_ID (unitless)\nCRUISE_ID (unitless)\nEVTNBR (unitless)\ntime (Datetime_utc, seconds since 1970-01-01T00:00:00Z)\nDATE_UTC (unitless)\nTIME_UTC (unitless)\nDATETIME_EST (unitless)\nDATE_EST (unitless)\nTIME_EST (unitless)\nlatitude (Latitude_ship, degrees_north)\nlongitude (Longitude_ship, degrees_east)\nPLATFORM (unitless)\nCASTNBR (unitless)\n... (116 more variables)\n BCO-DMO bcodmo_dataset_997813_v1
log in [STING II Dissolved Trace Metals] - Dissolved trace metal concentrations in water column samples and incubation experiments from STING II cruise EN704 on R/V Endeavor over the West Florida Shelf in July 2023 (Collaborative Research: Linking iron and nitrogen sources in an oligotrophic coastal margin: Nitrogen fixation and the role of boundary fluxes) Concentrations of dissolved trace metals (Al, Sc, Mn, Fe, Co, Ni, Cu, Zn, Cd, Gd, Lu, Pb) in phytoplankton shipboard incubation experiments and water column samples collected on STING II cruise EN704 on R/V Endeavor over the West Florida Shelf in July 2023.\nThis project investigates how groundwater discharge delivers important nutrients to the coastal ecosystems of the West Florida Shelf. Preliminary studies had indicated that groundwater may supply both dissolved organic nitrogen (DON) and iron in this region. In coastal ecosystems like the West Florida Shelf that have very low nitrate and ammonium concentrations, DON is the main form of nitrogen available to organisms. Nitrogen cycling is strongly affected by iron availability because iron is essential for both photosynthesis and for nitrogen fixation. This study investigated the sources and composition of DON and iron, and their influence on the coastal ecosystem. The team sampled offshore groundwater wells, river and estuarine waters from shore, and conducted two expeditions across the West Florida Shelf in winter and summer for surface and depth profile sampling and for shipboard incubation experiments.\n\ncdm_data_type = Other\nVARIABLES:\nSTING_ID (unitless)\nCRUISE_ID (unitless)\nEVTNBR (unitless)\ntime (Datetime_utc, seconds since 1970-01-01T00:00:00Z)\nDATE_UTC (unitless)\nTIME_UTC (unitless)\nDATETIME_EDT (unitless)\nDATE_EDT (unitless)\nTIME_EDT (unitless)\nlatitude (Latitude_ship, degrees_north)\nlongitude (Longitude_ship, degrees_east)\nPLATFORM (unitless)\nCASTNBR (unitless)\nSTNNBR (unitless)\nLATITUDE_map (degrees_north)\n... (62 more variables)\n BCO-DMO bcodmo_dataset_997847_v1
log in [TMs and Nuts from EXPORTS NA Incubations] - Dissolved trace metal and macronutrient concentration data from incubation experiments conducted during the May 2021 EXPORTS North Atlantic cruise (DY131) (Collaborative Research: Diatoms, Food Webs and Carbon Export - Leveraging NASA EXPORTS to Test the Role of Diatom Physiology in the Biological Carbon Pump) This dataset includes trace metal (iron, manganese, cobalt, nickel, copper, zinc, cadmium, lead) and macronutrient (nitrate+nitrite, nitrite, phosphate, silicic acid) concentration data from incubation experiments conducted on board the RRS Discovery during the EXPORTS North Atlantic campaign at the Porcupine Abyssal Plain-Sustained Observatory (PAP-SO) site (DY131). In these experiments, additions of macronutrients (N, P, Si) and Fe were used to assess the level of Si, N, and Fe stress being experienced by the phytoplankton and to contextualize taxa-specific metatranscriptome responses for resolving gene expression profiles in the in-situ communities.\n\nThis research project focuses on the vertical export of the carbon associated with a major group of phytoplankton, the diatoms in the North Atlantic near the Porcupine Abyssal Plain. The major objective is to understand how diatom community composition and the prevailing nutrient conditions create taxonomic differences in metabolic state that combine to direct diatom taxa to different carbon export pathways. The focus is on diatoms, given their large contribution to global marine primary productivity and carbon export which translates into a significant contribution to the biogeochemical cycling of carbon (C), nitrogen (N), phosphorus (P), iron (Fe) and silicon (Si). It is hypothesized that the type and degree of diatom physiological stress are vital aspects of ecosystem state that drive export. To test this hypothesis, combined investigator expertise in phytoplankton physiology, genomics, and trace element chemistry is used to assess the rates of nutrient use and the genetic composition and response of diatom communities, with measurements of silicon and iron stress to evaluate stress as a predictor of the path of diatom carbon export. The EXPORTS field campaign in the North Atlantic sampled a retentive eddy over nearly a month in May 2021, which coincided with the decline of the North Atlantic Spring Bloom.\n\ncdm_data_type = Other\nVARIABLES:\nCRUISE_ID (unitless)\nEVTNBR (unitless)\nDATE_UTC (unitless)\nJULIAN_DAY (unitless)\nEPOCH (unitless)\nEPOCH_DAY (unitless)\n... (61 more variables)\n BCO-DMO bcodmo_dataset_947637_v1

 
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