19:I[42426,["/_next/static/immutable/chunks/1xctgzqre-wsy.js","/_next/static/immutable/chunks/06_-wz6pdtp2b.js","/_next/static/immutable/chunks/30e52g49hg40p.js","/_next/static/immutable/chunks/02yq6tul2z-oh.js","/_next/static/immutable/chunks/10bx_ec2vj7n_.js","/_next/static/immutable/chunks/33bfn03fo8xnt.js","/_next/static/immutable/chunks/0tfjf78scu61b.js","/_next/static/immutable/chunks/31xnvej4n1bi9.js"],"default"] 1a:T47b,

Sampling and analytical methodology for carbonate, and organic carbon/nitrogen are described in detail in the "2019_OFP_Methodologies" document (see Supplemental Files).

Analytical methodology for the element data are described in detail in Conte et al. (2019).

The LiBO2 fusion method is described in detail in Huang et al. (2007).

Briefly, the dried <1mm sediment trap material is processed by fusion with high purity lithium metaborate (LiBO2) flux at 1000 C in a dedicated combustion furnace. The sample to LiBO2 flux ratio for fusion is approximately1:2.5. The fused sample bead is subsequently dissolved in 1M HNO3 for ICPMS analysis. From 2000 to 2004, we used 1–2 mg of flux material for analysis, but in 2005 we increased this to ~6 mg to reduce analytical variability associated with particle heterogeneity. Blank analyses of the LiBO2 flux are run with each sample set to assess contamination. The final sample solution was analyzed on a high-resolution Finnigan Element 2 ICPMS. A matrix-matching multi-element external standard solution was used for determination of the trace element concentrations.

1b:T1a35,The Oceanic Flux Program (OFP) has continuously measured particle fluxes in the deep Sargasso Sea since 1978. The OFP is the longest running continuous time-series of its kind, and has produced a unique record of temporal variability in material transfer from the surface to the deep ocean (the “biological pump") resulting from the interplay between physical, biological and chemical processes. The OFP deploys a subsurface mooring anchored in 4500m of water with three McLane Research Parflux Mark 8 sediment traps located at 500m, 1500m and 3200m depths. These traps continuously collect the sinking particle flux at an approximate 2 week sampling resolution. The most recent project awards and abstracts are listed below. A detailed history of funding with summary of all project awards for OFP can be found below. October 2024 through September 2027 NSF Award OCE-2421112 Abstract: This award provides an additional three years of support for the Oceanic Flux Program (OFP). The OFP was established in 1978 to measure the export flux of particles from the surface to the deep ocean in the deep Sargasso Sea near Bermuda. The OFP is the longest and most continuous particle flux time-series of its kind. Through collaboration with nearby upper ocean time-series programs, facilities, and other Bermuda-based sampling programs, OFP will continue to be a valuable resource for the oceanographic community in the effort to answer questions about the intricate relationship between deep ocean particle flux and climate, as well as biological, physical, and chemical oceanographic processes. Looking to the future, OFP will use increasingly advanced instrumentation and state-of-the-art analytical tools to investigate the nature and patterns of the material that sinks from the surface to deep ocean and the mechanisms that drive that process. The OFP provides education and training for students from high school to Ph.D. levels and supports early career researchers. OFP data and samples are broadly available to other researchers across the scientific disciplines. Two overarching goals drive core activities funded under the OFP grant. The first is to extend the time-series by collecting new samples of the highest quality, while ensuring they have a comprehensive oceanographic context. The second is to elucidate the processes that drive oceanic particle flux through comparative studies of flux magnitude and composition with concurrent observations of external forcing (e.g., synoptic scale meteorology, climate patterns), surface water physics and biology (e.g., mesoscale features, blooms), and interior processes (e.g., biological particle aggregation/disaggregation, elemental scavenging, authigenic mineralization). The specific grant objectives are: (1) to provide for continuity of the particle flux measurements at 500, 1500 and 3200 m depths and continue to refine the quality of the time-series record and expand its oceanographic context, (2) to update/calibrate OFP sample processing and analytical methods to enhance the time-series data record, and to curate the time-series sample archives for future study, (3) to promote collaborative research to maximize interdisciplinary information obtained from the samples, (4) to conduct focused studies to identify deep flux temporal trends and their coherence with upper ocean forcing, to elucidate causal flux generation processes, and to develop proxies for climate studies, (5) to provide education and training opportunities. A particular focus of this funding cycle will be to analyze the extensive OFP digital image archive with an automated (and/or semi-automated) approach, including classical methodologies and Deep Learning (DL) based tools for image classification, segmentation and archive, and a Graphical User Interface (GUI). The development of these new tools for identification, quantification, and characterization of the flux material will better exploit the image archive's potential, as fuller characterization of biological components will contribute new information on the ecosystem dynamics and responses to environmental forcing that drive flux generation. October 2023 through September 2025 NSF Award OCE-2414704 Abstract: This award provides an additional three years of support for the Oceanic Flux Program (OFP). This program was first established in 1978 to measure the export flux of particles from the surface to the deep ocean in the deep Sargasso Sea and represents the longest and most continuous particle flux time-series of its kind. This program and the time-series record will continue to help the oceanographic community to answer questions about the relationship between deep ocean particle flux and climate and biological, physical, and chemical oceanographic processes. In the past, the OFP has provided evidence for coupling between the upper and deep ocean processes linked to seasonal, episodic (e.g., physical and meteorological forcing) and climate patterns. Looking to the future, this program will utilize increasingly advanced instrumentation and analytical tools to address questions about the material that sinks from the surface to deep ocean and its controls. The OFP provides education and training for students from the high school to Ph.D. level and supports early career researchers. The OFP time-series represents a 43-year, nearly continuous record focused on particle fluxes in the deep ocean. With increasingly more data available from the lengthening record, investigators can put observed biogeochemical patterns into perspective to understand the interplay between climate and ocean functioning. The availability of data from complementary nearby Hydrostation S, the Bermuda Atlantic Time-Series (BATS), the Bermuda Testbed Mooring (1994-2007), the Tudor Hill atmospheric tower and other Bermuda sampling programs provide additional opportunities to study upper ocean physics and biogeochemistry coupled with deep ocean biogeochemical processes. The OFP record is becoming long enough to study deep flux linkages with gyre circulation and advective processes. The OFP's archive is an unparalleled resource for retrospective studies of temporal trends and the biogeochemical consequences of a changing ocean, including future impacts of ocean acidification. As the OFP heads into the future, increasingly sophisticated OFP mooring instrumentation (ADCP current profiling and backscatter; MicroCAT temperature, salinity, and oxygen measurements) and advances in digital imaging and analytical tools (both chemical and genomic) to probe the recovered flux materials continue to reveal novel, fundamental information about the oceanic particle flux and its controls 6:["$","$L19",null,{"dataset":{"_id":"784396","description":"

Mass flux and concentrations of bulk components (Carbonate, Organic Carbon/Nitrogen, Lithogenics, Opal) and elements in the flux at 500m, 1500m and 3200m depths from the OFP sediment trap time-series in the northern Sargasso Sea.

Access restrictions:
\nIf you plan to use this data, please contact me, Maureen H. Conte @ mconte@mbl.edu. For the OFP time-series records, it is extremely important that we have a record of how the data are utilized, and by whom to support continued OFP funding. Also, talking with me will ensure that you are clear about the data naming conventions, etc., and let you know if there are others using the data for similar research. I also can give you some valuable insights that should be valuable concerning the OFP flux data in general. Thank you! Maureen Conte, principal Investigator OFP time-series

\n","problem":"","acquisition":"$1a","processing":"

Processing information is described in detail in the \"2019_OFP_methodologies\" document (see Supplemental Files).

BCO-DMO Processing:
\n- modified parameter names: replaced % with \"pcnt\", > with \"gt\", < with \"lt\", and hyphens with underscores;
\n- replaced missing data and values of \"-999\" with \"nd\" (no data).

\n","bcodmoProcessing":"","title":"Mass flux and concentrations of bulk components (Carbonate, Organic Carbon/Nitrogen, Lithogenics, Opal) and elements in the flux at 500m, 1500m and 3200m depths from the OFP sediment trap time-series in the northern Sargasso Sea","nickname":"OFP Elemental","dataUrl":"","currentState":"Final no updates expected","currentStateId":"7","validated":true,"restricted":false,"version":"1","version_date":"2022-08-30T04:00:00.000Z","abstract":"This dataset includes mass flux and concentrations of bulk components (Carbonate, Organic Carbon/Nitrogen, Lithogenics, Opal) and elements in the flux at 500m, 1500m, and 3200m depths from the Ocean Flux Program (OFP) sediment trap time-series in the northern Sargasso Sea.","citation":"Conte, M. H. (2022) Mass flux and concentrations of bulk components (Carbonate, Organic Carbon/Nitrogen, Lithogenics, Opal) and elements in the flux at 500m, 1500m and 3200m depths from the OFP sediment trap time-series in the northern Sargasso Sea. Biological and Chemical Oceanography Data Management Office (BCO-DMO). (Version 1) Version Date 2022-08-30 [if applicable, indicate subset used]. doi:10.26008/1912/bco-dmo.784396.1 [access date]","citationParts":{"identifier":"doi:10.26008/1912/bco-dmo.784396.1","versionDate":"2022-08-30","versionId":"1","year":"2022","title":"Mass flux and concentrations of bulk components (Carbonate, Organic Carbon/Nitrogen, Lithogenics, Opal) and elements in the flux at 500m, 1500m and 3200m depths from the OFP sediment trap time-series in the northern Sargasso Sea","authors":"Conte, M. 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The wide top funnel accumulates particulate specimens into individual sample bottles. The cone interior is natural polyethylene. Deploys from a stand-alone mooring or a large high-tension vertical array.\r\n\r\nMcLane Mark 8 Data Sheet (PDF)\r\nMcLane website: https://mclanelabs.com/sediment-traps/","type_acronym":"McLane PARFLUX Mark 8"}],"parameters":[{"_id":"784429","name":"depth","format":"","frictionlessType":"","description":"

sampling depth in meters

","units":{"_id":"","name":"meters (m)"},"type":{"_id":"808","name":"depth","description":"

Observation/sample depth below the sea surface. Units often reported as: meters, feet.

\nWhen used in a JGOFS/GLOBEC dataset the depth is a best estimate; usually but not always calculated from pressure; calculated either from CTD pressure using Fofonoff and Millard (1982; UNESCO Tech Paper #44) algorithm adjusted for 1980 equation of state for seawater (EOS80) or simply equivalent to nominal depth as recorded during sampling if CTD pressure was unavailable.

"}},{"_id":"784430","name":"SampleID","format":"","frictionlessType":"","description":"

The OFP naming convention uses the month of the mooring recovery cruise, the sequential number of the trap cup, and trap depth. E.g. %11/10-4 1500 denotes the sample was recovered in Nov 2010, was the fourth trap cup in the sampling rotation during the deployment and the sediment trap was located at 1500m depth. Samples collected using the single cup trap (prior to 1989), are named by the recovery date only (Please note: The Sample ID does NOT indicate the date of sample collection!! The start date of the sample collection is provided by the sequence day (Sequence Day 1 = 4 Apr 1978) and the start calendar date.

","units":{"_id":"","name":"unitless"},"type":{"_id":"960","name":"sample","description":"

unique sample identification or number; any combination of alpha numeric characters; precise definition is file dependent

"}},{"_id":"784431","name":"SeqDay","format":"","frictionlessType":"","description":"

Number of days since the beginning of the OFP time-series (SeqDay 1=4 April 1978). The SeqDay is the first day of the sample collection period.

","units":{"_id":"","name":"unitless"},"type":{"_id":"1838","name":"time_elapsed","description":"

Elapsed time. Units can be seconds, minutes, etc.

"}},{"_id":"784432","name":"midSeqDay","format":"","frictionlessType":"","description":"

Sequence day of the middle of the sample collection period

","units":{"_id":"","name":"unitless"},"type":{"_id":"472028","name":"time_sample","description":"

Time when sample was taken. Typically used in laboratory experiments as time sample was collected. Could be hours, minutes, or even relative to a timeframe.

"}},{"_id":"784433","name":"StartYr","format":"","frictionlessType":"","description":"

Start year for sample

","units":{"_id":"","name":"unitless"},"type":{"_id":"1062","name":"year","description":"

year, reported as YYYY, e.g. 1995

"}},{"_id":"784434","name":"StartMo","format":"","frictionlessType":"","description":"

Start month for sample

","units":{"_id":"","name":"unitless"},"type":{"_id":"1115","name":"month","description":"

Month of year; numeric 1 to 12.

"}},{"_id":"784435","name":"StartDay","format":"","frictionlessType":"","description":"

Start day for sample

","units":{"_id":"","name":"unitless"},"type":{"_id":"1113","name":"day","description":"

day of month; numeric 1 to 31

"}},{"_id":"784436","name":"MidJDay","format":"","frictionlessType":"","description":"

Mid Julian Day is the Julian Day (Day of Year) of the midpoint of the sample collection period.

","units":{"_id":"","name":"unitless"},"type":{"_id":"472028","name":"time_sample","description":"

Time when sample was taken. Typically used in laboratory experiments as time sample was collected. Could be hours, minutes, or even relative to a timeframe.

"}},{"_id":"784437","name":"MassFlux","format":"","frictionlessType":"","description":"

Total mass Flux

","units":{"_id":"","name":"milligrams per square meter per day (mg/m2/day)"},"type":{"_id":"833853","name":"flux","description":"

A physical quality that exists by virtue of the rate of flow of the bearer across a given surface; the rate of flow of a fluid, radiant energy, or particles across a given area.

"}},{"_id":"784438","name":"pcnt_Carb_lt_125","format":"","frictionlessType":"","description":"

percent carbonate by weight

","units":{"_id":"","name":"unitless (percent)"},"type":{"_id":"489495","name":"carbonate","description":"

Concentration of carbonate ion ([CO3]2-) in seawater. Dissolved carbonate ion. Refer to dataset for units of measure.

"}},{"_id":"784439","name":"pcnt_Corg_lt_125","format":"","frictionlessType":"","description":"

percent organic carbon by weight

","units":{"_id":"","name":"unitless (percent)"},"type":{"_id":"707571","name":"C","description":"

Elemental carbon (C)

"}},{"_id":"784440","name":"pcnt_N_lt_125","format":"","frictionlessType":"","description":"

percent nitrogen by weight

","units":{"_id":"","name":"unitless (percent)"},"type":{"_id":"707573","name":"N","description":"

Nitrogen (N)

"}},{"_id":"784441","name":"pcnt_Lith_lt_1000est","format":"","frictionlessType":"","description":"

estimated mass percent lithogenic material

","units":{"_id":"","name":"unitless (percent)"},"type":{"_id":"886","name":"mass","description":"

mass; the amount of matter in an object.

"}},{"_id":"784442","name":"pcnt_Opal_lt_1000est","format":"","frictionlessType":"","description":"

estimated mass percent opal

","units":{"_id":"","name":"unitless (percent)"},"type":{"_id":"886","name":"mass","description":"

mass; the amount of matter in an object.

"}},{"_id":"784443","name":"Mg_lt_1000","format":"","frictionlessType":"","description":"

Mg concentration by weight

","units":{"_id":"","name":"milligrams per kilogram"},"type":{"_id":"527967","name":"Mg","description":"

Mg (magnesium) concentration. May be reported in parts per million, nanomoles/Liter, or other units. Refer to dataset metadata for units.

"}},{"_id":"784444","name":"Al_lt_1000","format":"","frictionlessType":"","description":"

Al concentration by weight

","units":{"_id":"","name":"milligrams per kilogram"},"type":{"_id":"1982","name":"Al","description":"

Al (Aluminum)

"}},{"_id":"784445","name":"Total_Si_lt_1000","format":"","frictionlessType":"","description":"

Total Si (Biogenic Si + lithogenic Si) concentration by weight

","units":{"_id":"","name":"milligrams per kilogram"},"type":{"_id":"490515","name":"Si","description":"

Silicon (Si). Concentrations may be reported in parts per million, nanomoles per liter, or other units. Refer to dataset metadata for units.

"}},{"_id":"784446","name":"P_lt_1000","format":"","frictionlessType":"","description":"

P concentration by weight

","units":{"_id":"","name":"milligrams per kilogram"},"type":{"_id":"1983","name":"P","description":"

P (Phosphorus). May be reported in parts per million, nanomoles per liter, or other units. Refer to dataset metadata for units.

"}},{"_id":"784447","name":"Ca_lt_1000","format":"","frictionlessType":"","description":"

Ca concentration by weight

","units":{"_id":"","name":"milligrams per kilogram"},"type":{"_id":"527969","name":"Ca","description":"

Calcium (Ca). Concentrations may be reported in parts per million, nanomoles per liter, or other units. Refer to dataset metadata for units.

"}},{"_id":"784448","name":"Sc_lt_1000","format":"","frictionlessType":"","description":"

Sc concentration by weight

","units":{"_id":"","name":"milligrams per kilogram"},"type":{"_id":"879413","name":"Sc","description":"

Scandium is a chemical element with the symbol Sc and atomic number 21.

"}},{"_id":"784449","name":"Ti_lt_1000","format":"","frictionlessType":"","description":"

Ti concentration by weight

","units":{"_id":"","name":"milligrams per kilogram"},"type":{"_id":"1984","name":"Ti","description":"

Titanium (Ti)

"}},{"_id":"784450","name":"V_lt_1000","format":"","frictionlessType":"","description":"

V concentration by weight

","units":{"_id":"","name":"milligrams per kilogram"},"type":{"_id":"527970","name":"V","description":"

V (Vanadium) concentration. May be reported in parts per million, nanomoles/Liter, or other units. Refer to dataset metadata for units.

"}},{"_id":"784451","name":"Cr_lt_1000","format":"","frictionlessType":"","description":"

Cr concentration by weight

","units":{"_id":"","name":"milligrams per kilogram"},"type":{"_id":"834290","name":"Cr","description":"

Chromium (Cr), including various isotopes and isotope ratios of Cr.

"}},{"_id":"784452","name":"Mn_lt_1000","format":"","frictionlessType":"","description":"

Mn concentration by weight

","units":{"_id":"","name":"milligrams per kilogram"},"type":{"_id":"490516","name":"Mn","description":"

Manganese (Mn). Concentrations may be reported in parts per million, nanomoles per liter, or other units. Refer to dataset metadata for units.

"}},{"_id":"784453","name":"Fe_lt_1000","format":"","frictionlessType":"","description":"

Fe concentration by weight

","units":{"_id":"","name":"milligrams per kilogram"},"type":{"_id":"1981","name":"Fe","description":"

Iron (Fe). Concentrations may be reported in parts per million, nanomoles per liter, or other units. Refer to dataset metadata for units.

"}},{"_id":"784454","name":"Co_lt_1000","format":"","frictionlessType":"","description":"

Co concentration by weight

","units":{"_id":"","name":"milligrams per kilogram"},"type":{"_id":"820057","name":"Co","description":"

Cobalt (Co)

"}},{"_id":"784455","name":"Ni_lt_1000","format":"","frictionlessType":"","description":"

Ni concentration by weight

","units":{"_id":"","name":"milligrams per kilogram"},"type":{"_id":"820060","name":"Ni","description":"

Nickel (Ni)

"}},{"_id":"784456","name":"Cu_lt_1000","format":"","frictionlessType":"","description":"

Cu concentration by weight

","units":{"_id":"","name":"milligrams per kilogram"},"type":{"_id":"707579","name":"Cu","description":"

Copper (Cu)

"}},{"_id":"784457","name":"Zn_lt_1000","format":"","frictionlessType":"","description":"

Zn concentration by weight

","units":{"_id":"","name":"milligrams per kilogram"},"type":{"_id":"709855","name":"Zn","description":"

Zinc (Zn) concentration.

"}},{"_id":"784458","name":"Sr_lt_1000","format":"","frictionlessType":"","description":"

Sr concentration by weight

","units":{"_id":"","name":"milligrams per kilogram"},"type":{"_id":"527973","name":"Sr","description":"

Sr (Strontium) concentration. May be reported in parts per million, nanomoles/Liter, or other units. Refer to dataset metadata for units.

"}},{"_id":"784459","name":"Cd_lt_1000","format":"","frictionlessType":"","description":"

Cd concentration by weight

","units":{"_id":"","name":"milligrams per kilogram"},"type":{"_id":"820750","name":"Cadmium","description":"

Cadmium (Cd)

"}},{"_id":"784460","name":"Ba_lt_1000","format":"","frictionlessType":"","description":"

Ba concentration by weight

","units":{"_id":"","name":"milligrams per kilogram"},"type":{"_id":"1985","name":"Ba","description":"

Ba (Barium). May be reported in parts per million, nanomoles per Liter, or other units. Refer to dataset metadata for units.

"}},{"_id":"784461","name":"Pb_lt_1000","format":"","frictionlessType":"","description":"

Pb concentration by weight

","units":{"_id":"","name":"milligrams per kilogram"},"type":{"_id":"707577","name":"Pb","description":"

Lead (Pb)

"}},{"_id":"784462","name":"Comments","format":"","frictionlessType":"","description":"

notes/comments

","units":{"_id":"","name":"unitless"},"type":{"_id":"778","name":"comment","description":"

free text comments, may only have meaning to submitting PI

"}}],"related_publications":[{"id":"784464","citation":"Conte, M. H., Carter, A. M., Koweek, D. A., Huang, S., & Weber, J. C. (2019). The elemental composition of the deep particle flux in the Sargasso Sea. Chemical Geology, 511, 279–313. doi:10.1016/j.chemgeo.2018.11.001\r\n","relation_type":["Methods"],"relation_desc":""},{"id":"784465","citation":"Huang, S., Sholkovitz, E. R., & Conte, M. H. (2007). Application of high-temperature fusion for analysis of major and trace elements in marine sediment trap samples. Limnology and Oceanography: Methods, 5(1), 13–22. doi:10.4319/lom.2007.5.13\r\n","relation_type":["Methods"],"relation_desc":""}],"related_datasets":[],"services":[{"grouping":"","items":[{"name":"View Data","description":"An in-browser view of the primary tabular data file","url":"https://www.bco-dmo.org/dataset/784396/data/view","contentType":"text/html","actionType":"view"}]},{"grouping":"Metadata","items":[{"name":"HTML","description":"A simple HTML page of the dataset metadata","url":"https://www.bco-dmo.org/dataset/784396/description","contentType":"text/html","actionType":"view"},{"name":"PDF","description":"A PDF of the HTML dataset metadata","url":"https://www.bco-dmo.org/dataset/784396/Dataset_description.pdf","contentType":"application/pdf","actionType":"download"},{"name":"ISO 19115-2 (NOAA Profile)","description":"","url":"https://www.bco-dmo.org/dataset/784396/iso","contentType":"application/xml","actionType":"download"}]}],"programs":[{"_id":"2036","name":"Oceanic Flux Program","acronym":"OFP"}],"projects":[{"_id":"2286","name":"Time Series Particle Flux Measurements in the Sargasso Sea","acronym":"OFP Sargasso Sea","description":"$1b"}],"archives":[{"id_value":"10.26008/1912/bco-dmo.784396.1","url":"https://doi.org/10.26008/1912/bco-dmo.784396.1","date_assigned":"2022-08-30","version_date":"2022-08-30","archiver":"Marine Biological Laboratory/Woods Hole Oceanographic Institution Library (MBLWHOI DLA)","archiver_id":"272"}],"license":{"name":"Creative Commons Attribution 4.0","id":"CC-BY-4.0","uri":"https://creativecommons.org/licenses/by/4.0/","spdxUri":"https://spdx.org/licenses/CC-BY-4.0"},"metrics":{"views":{"count":310},"downloads":{"count":830}}}}]