14:I[71133,["4507","static/chunks/e2799680-446c489506865058.js","7665","static/chunks/7665-81c5407bc4489ff9.js","8500","static/chunks/8500-e4dd1cb1bb626827.js","9753","static/chunks/9753-028c0a26aa71f2d4.js","8437","static/chunks/8437-a09d0b83fcec76af.js","4557","static/chunks/4557-64c5efa221bc528f.js","947","static/chunks/947-410627998426400f.js","5357","static/chunks/5357-6142894e88cb7da2.js","8382","static/chunks/app/dataset/%5Bid%5D/data/view/page-177ea8adea7aed86.js"],"default"] 15:T86f,

The vessel came to a stop when the predetermined sampling station was reached, at a time decided on by the ship's command. The location and time of sampling were recorded, as well as the environmental conditions. The trained crew members of the vessel then used a YSI water quality sonde to collect data that were recorded. A Secchi disc with measurement indicators every 10 centimeters was then deployed, and recordings were taken on both the upcast and downcast. A Van Dorn water sampler was then used to collect water at a depth of 1 meter. Water samples were then transferred to 1-liter (L) polyethylene storage bottles or 2 L plastic storage bottles, and stored in a dark place at 4 degrees Celsius until picked up by personnel on the same day. The samples were then transported in dark coolers containing ice packs to Bowling Green State University (BGSU) or the University of Windsor (GLIER). Samples were also collected from Mitchell's Bay (a land-based sampling location) using the same methods and observational conventions.

Sub-samples for chlorophyll a were taken in the laboratory using 0.45 micrometer (um) nylon and 20 um polycarbonate membranes and a vacuum filtration system. The filter was placed in a screw cap polyethylene centrifuge tube and stored in a dark freezer until extraction. The samples were extracted using 90% acetone and kept at -20 degrees Celsius for 24 hours, and chlorophyll was measured using a TD-700 fluorometer (Welschmeyer, 1994).

Total and dissolved nutrient samples were held in acid-washed 250 milliliter (mL) polyethylene bottles and stored in a dark freezer at -20 degrees Celsius until they were ready to be analyzed. Dissolved nutrient sub-samples were taken by filtering the agitated sampled water through 0.22 um filters. The frozen samples were then shipped on ice to the National Center for Water Quality Research at Heidelberg University (Tiffin, OH). Microscopy was performed on raw water samples that were preserved with 5% Lugol's iodine solution. These samples were stored at room temperature in the dark until shipped and analyzed by Aquatic Taxonomy Specialists (Malinta, OH).

16:T5e6,This section documents curation actions performed by BCO-DMO and additional information relevant to understanding and reusing this dataset. It distinguishes changes made to the submitted (meta)data from unresolved issues and/or enhancements that improve future reuse and interoperability. CURATION ACTIONS PERFORMED ON DATA - Imported original file "winter_lake_erie_2025_metadata.csv" into the BCO-DMO data processing system. - Treated "-" as a missing data value (missing data values are empty/blank in the final CSV file). - Created new column ISO_DateTime_Local by combining date (format %m-%d-%Y) and time_edt (format %H:%M) columns into a datetime with output format %Y-%m-%dT%H:%M. - Converted date column format from %m-%d-%Y to %Y-%m-%d, output as date type. - Renamed columns to comply with BCO-DMO naming conventions. - Saved the final file as "1006222_v1_winter_lake_erie_2024_to_2025.csv". CURATION ACTIONS PERFORMED ON METADATA - BCO-DMO's standard metadata entry and text formatting steps were performed. ISSUES POTENTIALLY IMPACTING REUSE - The time zone is listed as Eastern Daylight Time (EDT), but during the time span of the dataset, local time would have switched to Eastern Standard Time (EST). One might assume EDT was used throughout the dataset, but this has not been confirmed by the data submitter. - This dataset has been published "as is". Final review by the data submitter was not received after the data were imported into the BCO-DMO data system. 17:T798,NSF Award Abstract: The Lake Erie Center for Fresh Waters and Human Health is a five-year, multi-institutional effort aimed at understanding the environmental factors and ongoing changes that influence the growth and toxicity of cyanobacterial harmful algal blooms (cHABs) in Lake Erie. The Center will support three research projects. Specifically these projects address the following aims: first, how environmental cues promote or constrain the proliferation of cHAB species in mixed populations; second, how environmental cues influence toxin production by cHAB species; third, how other member of the microbial assemblage influence cHAB growth and toxicity. The Center will provide a Community Engagement Core to lead outreach activities that will inform the general public on the effects of cHABs by efforts that include: (1) a community engaged scholarship training for scientists associated with the Center, (2) community-engaged scholarship training for practitioners or community members associated with the Center, and (3) a stakeholder needs assessment for Great Lakes and environmental health literacy to inform general outreach information needs. A citizen science engagement with charter boat captains will further develop a near real-time database on cHAB severity in Lake Erie, and the Facilities Core will provide metadata that not only serve the three stated research projects, but also yield a database available to all Great Lakes scientists. The outcomes are to involve community stakeholders and researchers in the Great Lakes on issues regarding human health, climate change and awareness of threats to our fresh water resources. The Center is jointly supported by NSF and by the National Institute for Environmental Health Sciences (NIEHS). This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.6:["$","$L14",null,{"dataset":{"_id":"1006222","description":"","problem":"See \"BCO-DMO Curation Notes\".","acquisition":"$15","processing":"

The meteorological data was taken directly from readings using vessel instruments, marine forecasts, and expert observations. The physico-chemical data was obtained using a YSI 600QS multiparameter sonde, and nutrient concentrations were analyzed at the National Center for Water Quality Research at Heidelberg University. Fluorometric classification of phytoplankton was measured using a FluoroProbe (bbe Moldaenke GmbH, Schwentinental, Germany), and plankton taxonomic classification and cell enumeration was conducted by Aquatic Taxonomy Specialists (Malinta, OH). The extractive chlorophyll was read using a TD-700 Fluorometer (Turner Designs Inc., San Jose, CA), the sample concentrations were then calculated with the equation below, and the averages for each site were calculated from the triplicate samples.

\nChla = ((reading*volume_extracted)/volume_filtered)* dilution factor

\n","bcodmoProcessing":"$16","title":"Environmental observations, physico-chemical data, chlorophyll, total and dissolved nutrients, plankton taxonomic classification, and cell abundance from surveys of Lake Erie from November 2024 to March 2025","nickname":"Winter survey data from Lake Erie from Nov 2024 to Mar 2025","dataUrl":"","currentState":"Final","currentStateId":"7","validated":false,"restricted":false,"version":"1","version_date":"2026-08-26T04:00:00.000Z","abstract":"This dataset includes winter survey data from Lake Erie collected on USCG Morro Bay, CCGS Griffon, CCGS Samuel Risley, and MV Vigilant from November 2024 to March 2025. The survey includes environmental observations, physico-chemical data, chlorophyll, total and dissolved nutrients, plankton taxonomic classification, and cell abundance. The Lake Erie Center for Fresh Waters and Human Health is a multi-institutional effort aimed at understanding the environmental factors and ongoing changes that influence the growth and toxicity of cyanobacterial harmful algal blooms (cHABs) in Lake Erie. ","citation":"Hudson, N. C., McKay, R. M., Bullerjahn, G. S., LeBlanc, J. (2026) Environmental observations, physico-chemical data, chlorophyll, total and dissolved nutrients, plankton taxonomic classification, and cell abundance from surveys of Lake Erie from November 2024 to March 2025. Biological and Chemical Oceanography Data Management Office (BCO-DMO). (Version 1) Version Date 2026-08-26 [if applicable, indicate subset used]. doi:10.26008/1912/bco-dmo.1006222.1 [access date]","citationParts":{"identifier":"doi:10.26008/1912/bco-dmo.1006222.1","versionDate":"2026-08-26","versionId":"1","year":"2026","title":"Environmental observations, physico-chemical data, chlorophyll, total and dissolved nutrients, plankton taxonomic classification, and cell abundance from surveys of Lake Erie from November 2024 to March 2025","authors":"Hudson, N. C., McKay, R. M., Bullerjahn, G. S., LeBlanc, J.","publisher":"Biological and Chemical Oceanography Data Management Office (BCO-DMO)."},"doi":"10.26008/1912/bco-dmo.1006222.1","release_date":null,"field_dataset_location":"Laurentian Great Lakes","temporal_extent":{"start":"2024-11-02T04:00:00.000Z","end":"2025-03-11T04:00:00.000Z"},"temporal":{"resolution":"time:unitDay","type":"time:Interval","start":{"value":"1730520000","label":"2024-11-02"},"end":{"value":"1741665600","label":"2025-03-11"}},"spatial_extent":{"shape":"polygon","center":{"latitude":42.142500000001,"longitude":-81.654500000003},"wkt":"POLYGON ((-82.667 41.715, -80.642 41.715, -80.642 42.57, -82.667 42.57, -82.667 41.715))","north":42.57,"east":-80.642,"south":41.715,"west":-82.667},"dataset_type":["Cruise Results"],"keywords":["oceans"],"data_files":[{"id":"1010898","title":"1006222_v1_winter_lake_erie_2024_to_2025.csv","url":"https://datadocs.bco-dmo.org/dataset/1006222/file/l8Z0KnEIAxgg77/1006222_v1_winter_lake_erie_2024_to_2025.csv","showTableUrl":"https://www.bco-dmo.org/dataset/1006222/data/view/1010898","description":"Primary data file for dataset ID 1006222, version 1","filename":"1006222_v1_winter_lake_erie_2024_to_2025.csv","bytesize":6623,"checksum":{"value":"a7870a9593e2595a8bf49649a38b9c7e","Algorithm":{"_id":"190","name":"MD5"}},"mimetype":"text/csv","fileType":{"_id":"192","name":"Comma Separated Values (.csv)"},"isErddap":"bcodmo_dataset_1006222_v1","date":"","isPublicDuringEmbargo":false,"primaryDataFile":true,"showTable":true,"restricted":false}],"supplemental_files":[],"roles":[{"role":{"_id":"138","name":"Principal Investigator"},"performedBy":{"_id":"51463","name":"Robert Michael McKay"},"performedAtOrganization":{"_id":"809954","name":"University of Windsor"}},{"role":{"_id":"140","name":"Co-Principal Investigator"},"performedBy":{"_id":"51464","name":"George S. Bullerjahn"},"performedAtOrganization":{"_id":"279","name":"Bowling Green State University"}},{"role":{"_id":"128","name":"Student"},"performedBy":{"_id":"940114","name":"Neve C. Hudson"},"performedAtOrganization":{"_id":"809954","name":"University of Windsor"}},{"role":{"_id":"135","name":"Technician"},"performedBy":{"_id":"1006229","name":"Jonathon LeBlanc"},"performedAtOrganization":{"_id":"809954","name":"University of Windsor"}},{"role":{"_id":"145","name":"BCO-DMO Data Manager"},"performedBy":{"_id":"51498","name":"Shannon Rauch"},"performedAtOrganization":{"_id":"191","name":"Woods Hole Oceanographic Institution"}}],"deployments":[],"funding":[{"_id":"751268","name":"OCE-1840715","fundingSource":{"_id":"355","name":"NSF Division of Ocean Sciences"},"url":"https://www.nsf.gov/awardsearch/show-award?AWD_ID=1840715"}],"instruments":[{"_id":"1006232","name":"Sample bottles (Nalgene or equivalent), plastic wash bottles, polyethylene bottles","description":"Sample bottles, 1 or 2 L (Nalgene or equivalent), Plastic wash bottle, 500 mL: Water samples are then transferred to 1 L polyethylene storage bottles or 2 L plastic storage bottles, and stored in a dark place at 4 degrees C until picked up by personnel on the same day.\nTotal and dissolved nutrient samples were held in acid-washed 250 mL polyethylene bottles, and stored in a dark freezer at -20 degrees C until ready to be analyzed.","type_id":"542498","type_name":"Bottle","type_desc":"A container, typically made of glass or plastic and with a narrow neck, used for storing drinks or other liquids.","type_acronym":"Bottle"},{"_id":"1006238","name":"FluoroProbe","description":"Fluorometric classification of phytoplankton was measured using a FluoroProbe (bbe Moldaenke GmbH, Schwentinental, Germany).","type_id":"484","type_name":"Fluorometer","type_desc":"A fluorometer or fluorimeter is a device used to measure parameters of fluorescence: its intensity and wavelength distribution of emission spectrum after excitation by a certain spectrum of light. The instrument is designed to measure the amount of stimulated electromagnetic radiation produced by pulses of electromagnetic radiation emitted into a water sample or in situ.","type_acronym":"Fluorometer"},{"_id":"1006239","name":"National Center for Water Quality Research at Heidelberg University","description":"Total and dissolved nutrient samples were analyzed at the National Center for Water Quality Research at Heidelberg University (Tiffin, OH).","type_id":"558","type_name":"Nutrient Autoanalyzer","type_desc":"Nutrient Autoanalyzer is a generic term used when specific type, make and model were not specified. In general, a Nutrient Autoanalyzer is an automated flow-thru system for doing nutrient analysis (nitrate, ammonium, orthophosphate, and silicate) on seawater samples.","type_acronym":"Nutrient Autoanalyzer"},{"_id":"1006233","name":"Secchi Disc","description":"A Secchi disc with measurement indicators every 10 centimeters was deployed and recordings were taken on both the upcast and downcast.","type_id":"609","type_name":"Secchi Disc","type_desc":"Typically, a 16 inch diameter white/black quadrant disc used to measure water optical clarity","type_acronym":"Secchi Disc"},{"_id":"1006234","name":"TD-700 fluorometer","description":"The extractive chlorophyll was read using a TD-700 Fluorometer (Turner Designs Inc., San Jose, CA), the sample concentrations were then calculated with the equation below, and the averages for each site were calculated from the triplicate samples.","type_id":"694","type_name":"Turner Designs 700 Laboratory Fluorometer","type_desc":"The TD-700 Laboratory Fluorometer is a benchtop fluorometer designed to detect fluorescence over the UV to red range. The instrument can measure concentrations of a variety of compounds, including chlorophyll-a and fluorescent dyes, and is thus suitable for a range of applications, including chlorophyll, water quality monitoring and fluorescent tracer studies. Data can be output as concentrations or raw fluorescence measurements.","type_acronym":"TD-700"},{"_id":"1006235","name":"Vacuum manifold system","description":"Vacuum manifold system to accommodate 3 filter funnels","type_id":"891003","type_name":"vacuum manifold","type_desc":"A device that is used for the vacuum-driven processing of multiwell strips or plates, or spin columns.","type_acronym":""},{"_id":"1006236","name":"2 L Van Dorn water sampler","description":"A Van Dorn water sampler was used to collect water at a depth of 1 meter.","type_id":"755357","type_name":"Van Dorn water sampler","type_desc":"A free-flushing water sample bottle comprising a cylinder (polycarbonate, acrylic or PVC) with a stopper at each end. The bottle is closed by means of a messenger from the surface releasing the tension on a latex band and thus pulling the two stoppers firmly into place. A thermometer can be mounted inside the bottle. One or more bottles can be lowered on a line to allow sampling at a single or multiple depth levels. Van Dorn samplers are suitable for physical (temperature), chemical and biological sampling in shallow to very deep water. Bottles are typically lowered vertically through the water column although a horizontal version is available for sampling near the seabed or at thermoclines or chemoclines. Because of the lack of metal parts the bottles are suitable for trace metal sampling, although the blue polyurethane seal used in the Alpha version may leach mercury. The Beta version uses white ASA plastic seals that do not leach mercury but are less durable.","type_acronym":""},{"_id":"1006237","name":"YSI 600QS multiparameter sonde","description":"The physico-chemical data was obtained using a YSI 600QS multiparameter sonde, and nutrient concentrations were analyzed at the National Center for Water Quality Research at Heidelberg University.","type_id":"663","type_name":"YSI Sonde 6-Series","type_desc":"YSI 6-Series water quality sondes and sensors are instruments for environmental monitoring and long-term deployments. YSI datasondes accept multiple water quality sensors (i.e., they are multiparameter sondes). Sondes can measure temperature, conductivity, dissolved oxygen, depth, turbidity, and other water quality parameters. The 6-Series includes several models. More from YSI.","type_acronym":"YSI Sonde 6-Series"}],"parameters":[{"_id":"1006242","name":"station","format":"","frictionlessType":"string","description":"

Station identifier

","units":{"_id":"","name":"unitless"},"type":{"_id":"987","name":"station","description":"

Station identifier; a unique number or alphanumeric string designating a general geographic location at which one or more sampling activities may occur.

"}},{"_id":"1006243","name":"lake","format":"","frictionlessType":"string","description":"

Lake sampled

","units":{"_id":"","name":"unitless"},"type":{"_id":"1124","name":"site","description":"

Sampling site identification.

"}},{"_id":"1006244","name":"date","format":"%Y-%m-%d","frictionlessType":"date","description":"

Date of sample collection

","units":{"_id":"","name":"unitless"},"type":{"_id":"1070","name":"date","description":"

date; generally reported in GMT as YYYYMMDD (year; month; day); also as MMDD (month; day); EqPac dates are local Hawaii time. ISO_Date format is YYYY-MM-DD (http://www.iso.org/iso/home/standards/iso8601.htm)

"}},{"_id":"1006245","name":"time_edt","format":"%H:%M","frictionlessType":"time","description":"

Time of sample collection; HH:MM format in Eastern Daylight time

","units":{"_id":"","name":"unitless"},"type":{"_id":"1075","name":"time","description":"

Time GMT defined as HHMM; time of day; generally reported in GMT as HHMM (hours and minutes) but may also be HH.H (decimal hours) or HHMMSS (hours; minutes and seconds); in EqPac time is reported as Hawaii local time

"}},{"_id":"1006246","name":"ISO_DateTime_Local","format":"%Y-%m-%dT%H:%M","frictionlessType":"datetime","description":"

Date and time of sample collection (EDT) in ISO 8601 format

","units":{"_id":"","name":"unitless"},"type":{"_id":"1070","name":"date","description":"

"}},{"_id":"1006247","name":"latitude_dec_deg","format":"","frictionlessType":"number","description":"

Latitude of sample collection, South is negative

","units":{"_id":"","name":"decimal degrees"},"type":{"_id":"730","name":"latitude","description":"

latitude, in decimal degrees, North is positive, negative denotes South; Reported in some datasets as degrees, minutes

"}},{"_id":"1006249","name":"longitude_dec_deg","format":"","frictionlessType":"number","description":"

Longitude of sample collection, West is negative

","units":{"_id":"","name":"decimal degrees"},"type":{"_id":"731","name":"longitude","description":"

longitude, in decimal degrees, East is positive, negative denotes West; Reported in some datasets as degrees, minutes

"}},{"_id":"1006251","name":"lat_long","format":"","frictionlessType":"string","description":"

Latitude and longitude of sample site. Lat, long format

","units":{"_id":"","name":"decimal degrees"},"type":{"_id":"1740","name":"site_descrip","description":"

Description or characteristics of a sampling site

"}},{"_id":"1006252","name":"sample_depth","format":"","frictionlessType":"integer","description":"

Depth sample taken

","units":{"_id":"","name":"meters"},"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":"1006254","name":"station_depth","format":"","frictionlessType":"number","description":"

Depth of the sample site

","units":{"_id":"","name":"meters"},"type":{"_id":"818","name":"depth_w","description":"

water depth, in meters

"}},{"_id":"1006255","name":"air_temp","format":"","frictionlessType":"number","description":"

Air temperature

","units":{"_id":"","name":"degrees Celsius"},"type":{"_id":"997","name":"temp_air","description":"

air temperature; see dataset for units of measurement, may be in degrees C or F

"}},{"_id":"1006256","name":"water_temp","format":"","frictionlessType":"number","description":"

Surface water temperature

","units":{"_id":"","name":"degrees Celsius"},"type":{"_id":"733","name":"temperature","description":"

water temperature at measurement depth

"}},{"_id":"1006257","name":"snow_thickness","format":"","frictionlessType":"number","description":"

Depth of snow on the surface ice

","units":{"_id":"","name":"inches"},"type":{"_id":"557858","name":"snow_thickness","description":"

Snow thickness

"}},{"_id":"1006258","name":"snow_cover_percent","format":"","frictionlessType":"integer","description":"

Estimated area of sample site covered with snow

","units":{"_id":"","name":"percent (%)"},"type":{"_id":"2005","name":"snow_cover","description":"

Snow cover expressed as a percentage

"}},{"_id":"1006259","name":"ice_thickness","format":"","frictionlessType":"string","description":"

Thickness of ice

","units":{"_id":"","name":"inches"},"type":{"_id":"2004","name":"ice_thickness","description":"

Ice thickness

"}},{"_id":"1006260","name":"ice_cover_percent","format":"","frictionlessType":"integer","description":"

Estimated area of sample site covered by ice

","units":{"_id":"","name":"percent (%)"},"type":{"_id":"2003","name":"ice_cover","description":"

Ice cover expressed as a percentage

"}},{"_id":"1006261","name":"ice_narrative","format":"","frictionlessType":"string","description":"

Description of ice

","units":{"_id":"","name":"unitless"},"type":{"_id":"862","name":"ice_cover_type","description":"

primary ice type covering sea surface based on the Antarctic Sea-Ice Process and Climatic classification system

"}},{"_id":"1006262","name":"wind_speed","format":"","frictionlessType":"string","description":"

Wind speed

","units":{"_id":"","name":"knots"},"type":{"_id":"1052","name":"wind_speed","description":"

wind speed, typically in m/s but may be reported in other units (refer to dataset for units)

"}},{"_id":"1006263","name":"wind_direction","format":"","frictionlessType":"string","description":"

Wind direction in cardinal (compass) directions

","units":{"_id":"","name":"unitless"},"type":{"_id":"1044","name":"wind_dir","description":"

wind direction reports as compass degrees, using meteorologic convention of 'from' not 'to'

"}},{"_id":"1006264","name":"barometer","format":"","frictionlessType":"number","description":"

Barometer reading

","units":{"_id":"","name":"inches Hg"},"type":{"_id":"940","name":"press_bar","description":"

barometric pressure or atmospheric pressure. Not hydropressure.

"}},{"_id":"1006265","name":"cloud_cover_percent","format":"","frictionlessType":"integer","description":"

Estimated cloud cover

","units":{"_id":"","name":"percent (%)"},"type":{"_id":"1693","name":"cloud_pct","description":"

percentage of cloud cover

"}},{"_id":"1006266","name":"wave_height","format":"","frictionlessType":"number","description":"

Wave height

","units":{"_id":"","name":"meters"},"type":{"_id":"1694","name":"wave_height","description":"

height of waves

"}},{"_id":"1006267","name":"ph","format":"","frictionlessType":"number","description":"

","units":{"_id":"","name":"unitless"},"type":{"_id":"1892","name":"pH","description":"

pH: The measure of the acidity or basicity of an aqueous solution

"}},{"_id":"1006268","name":"dissolved_oxygen_percent","format":"","frictionlessType":"number","description":"

Dissolved oxygen of surface water

","units":{"_id":"","name":"percent (%)"},"type":{"_id":"910","name":"dissolved Oxygen","description":"

dissolved oxygen concentration

"}},{"_id":"1006269","name":"dissolved_oxygen","format":"","frictionlessType":"number","description":"

Dissolved mg of oxygen per litre of water

","units":{"_id":"","name":"milligrams per liter (mg L-1)"},"type":{"_id":"910","name":"dissolved Oxygen","description":"

dissolved oxygen concentration

"}},{"_id":"1006270","name":"secchi_down_up","format":"","frictionlessType":"string","description":"

Downcast and upcast readings; measure of water transparency

","units":{"_id":"","name":"meters"},"type":{"_id":"1953","name":"depth_secchi","description":"

The depth at which a Secchi disk disappears, a measure of water clarity.

"}},{"_id":"1006271","name":"ammonia","format":"","frictionlessType":"number","description":"

Dissolved nutrients: ammonia

","units":{"_id":"","name":"milligrams per liter (mg L-1)"},"type":{"_id":"810511","name":"Ammonia","description":"

Concentration of ammonia {NH3 CAS 7664-41-7} per unit volume of the water body

"}},{"_id":"1006272","name":"chloride","format":"","frictionlessType":"number","description":"

Dissolved nutrients: chloride

","units":{"_id":"","name":"milligrams per liter (mg L-1)"},"type":{"_id":"661641","name":"chloride","description":"

Chloride ion Cl-

"}},{"_id":"1006273","name":"sulfate","format":"","frictionlessType":"number","description":"

Dissolved nutrients: sulfate

","units":{"_id":"","name":"milligrams per liter (mg L-1)"},"type":{"_id":"1904","name":"SO4","description":"

Concentration or quantity of sulfate (SO4)

"}},{"_id":"1006274","name":"nitrite","format":"","frictionlessType":"number","description":"

Dissolved nutrients: nitrite

","units":{"_id":"","name":"milligrams per liter (mg L-1)"},"type":{"_id":"1192","name":"NO2","description":"

Nitrite

"}},{"_id":"1006275","name":"nitrate","format":"","frictionlessType":"number","description":"

Dissolved nutrients: nitrate

","units":{"_id":"","name":"milligrams per liter (mg L-1)"},"type":{"_id":"1194","name":"NO3","description":"

Nitrate concentration in the water column

"}},{"_id":"1006276","name":"silica","format":"","frictionlessType":"number","description":"

Dissolved nutrients: silica

","units":{"_id":"","name":"milligrams per liter (mg L-1)"},"type":{"_id":"661639","name":"silica","description":"

Silicon Dioxide SiO2 (silica)

"}},{"_id":"1006277","name":"soluble_reactive_phosphorus","format":"","frictionlessType":"number","description":"

Dissolved nutrients: soluble reactive phosphorus

","units":{"_id":"","name":"milligrams per liter (mg L-1)"},"type":{"_id":"2007","name":"Soluble reactive phosphorus","description":"

SRP - Soluble reactive phosphorus, one of the biologically available fractions of phosphorus in water

"}},{"_id":"1006278","name":"fluoride","format":"","frictionlessType":"number","description":"

Dissolved nutrients: fluoride

","units":{"_id":"","name":"milligrams per liter (mg L-1)"},"type":{"_id":"908234","name":"fluoride_ion","description":"

A fluoride ion (F-) that is incorporated into any compound readily dissolved in water.

"}},{"_id":"1006279","name":"total_phosphorus","format":"","frictionlessType":"number","description":"

Particulate nutrients: total phosphorus

","units":{"_id":"","name":"milligrams per liter (mg L-1)"},"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":"1006280","name":"total_nitrogen","format":"","frictionlessType":"number","description":"

Particulate nutrients: total nitrogen

","units":{"_id":"","name":"milligrams per liter (mg L-1)"},"type":{"_id":"707573","name":"N","description":"

Nitrogen (N)

"}},{"_id":"1006281","name":"conductivity","format":"","frictionlessType":"number","description":"

Molar conductivity of raw water

","units":{"_id":"","name":"molar conductivity"},"type":{"_id":"779","name":"conductivity","description":"

Conductivity. Units and collection methods may vary. Often reported in Siemens/meter.

When used in a JGOFS/GLOBEC project this is the conductivity in Siemens/meter for the primary conductivity sensor on a CTD.

"}},{"_id":"1006282","name":"chlorophyll_a_gt_0_45_um","format":"","frictionlessType":"number","description":"

Average extracted chlorophyll of cell fraction greater than 0.45 um

","units":{"_id":"","name":"micrograms per liter (ug L-1)"},"type":{"_id":"766","name":"chlorophyll a","description":"

Total chlorophyll a pigment. See dataset for units of measurement; often reported in: milligrams per cubic meter (mg/m3); micrograms/liter (ug/L); nanograms/liter (ng/L).

CAUTION Within JGOFS MERGED water column products: this parameter is derived from HPLC methodology and the units are nanograms/liter; however; this parameter name is also used for a variety of water and nonwater column sampling; derived via the fluorometric method; units will also vary.

"}},{"_id":"1006283","name":"chlorophyll_a_gt_20_um","format":"","frictionlessType":"number","description":"

Average extracted chlorophyll of cell fraction greater than 20 um

","units":{"_id":"","name":"micrograms per liter (ug L-1)"},"type":{"_id":"766","name":"chlorophyll a","description":"

Total chlorophyll a pigment. See dataset for units of measurement; often reported in: milligrams per cubic meter (mg/m3); micrograms/liter (ug/L); nanograms/liter (ng/L).

"}},{"_id":"1006284","name":"amphora_spp","format":"","frictionlessType":"integer","description":"

Cell abundance: Amphora spp

","units":{"_id":"","name":"Cells per mL (cells ml-1)"},"type":{"_id":"735","name":"abundance","description":"