http://lod.bco-dmo.org/id/dataset/822048
eng; USA
utf8
dataset
Highest level of data collection, from a common set of sensors or instrumentation, usually within the same research project
Biological and Chemical Oceanography Data Management Office (BCO-DMO)
Unavailable
508-289-2009
WHOI MS#36
Woods Hole
MA
02543
USA
info@bco-dmo.org
http://www.bco-dmo.org
Monday - Friday 8:00am - 5:00pm
For questions regarding this resource, please contact BCO-DMO via the email address provided.
pointOfContact
2020-08-26
ISO 19115-2 Geographic Information - Metadata - Part 2: Extensions for Imagery and Gridded Data
ISO 19115-2:2009(E)
Water column data sampled aboard the R/V Pelican during August and September 2016 and May 2017 in Northern Gulf of Mexico, specifically the Louisiana Shelf region dominated by the discharge of the Mississippi River plume.
2020-09-01
publication
2020-09-01
revision
Marine Biological Laboratory/Woods Hole Oceanographic Institution Library (MBLWHOI DLA)
2020-09-03
publication
https://doi.org/10.26008/1912/bco-dmo.822048.1
Jeffrey W. Krause
Dauphin Island Sea Lab
principalInvestigator
Kanchan Maiti
Louisiana State University Dept. of Oceanography and Coastal Science
principalInvestigator
Biological and Chemical Oceanography Data Management Office (BCO-DMO)
Unavailable
508-289-2009
WHOI MS#36
Woods Hole
MA
02543
USA
info@bco-dmo.org
http://www.bco-dmo.org
Monday - Friday 8:00am - 5:00pm
For questions regarding this resource, please contact BCO-DMO via the email address provided.
publisher
Cite this dataset as: Krause, J., Acton, S., Marquez Jr., I., Pickering, R., Maiti, K. (2020) Water column data sampled aboard the R/V Pelican during August and September 2016 and May 2017 in Northern Gulf of Mexico, specifically the Louisiana Shelf region dominated by the discharge of the Mississippi River plume. Biological and Chemical Oceanography Data Management Office (BCO-DMO). (Version 1) Version Date 2020-09-01 [if applicable, indicate subset used]. doi:10.26008/1912/bco-dmo.822048.1 [access date]
Methods and Sampling: <p>Hydrocasts were conducted at identified stations. A SeaBird CTD and rosette system, owned and maintained by Louisiana Universities Marine Consortium (LUMCON), operating institution for the R/V Pelican, was used for sampling. Calibration information can be found associated with the CTD data. Unless otherwise stated, samples used for rate measurements were collected based on the percent irradiance relative to that just below the surface.</p>
<p>Water was sampled from Niskin bottles and pooled into 10 L acid-cleaned carboys. For inorganic nutrients, water was filtered using 0.6 μm pore size polycarbonate membrane and immediately frozen until analysis. Filtered water was analyzed for total dissolved nitrogen (TDN), nitrate+nitrite (NO<sub>3</sub> + NO<sub>2</sub>), nitrite, soluble reactive phosphate (SRP), and ammonium (NH<sub>4</sub>) colorimetrically using Skalar autoanalyzer (Dzwonkowski et al. 2017), and for dissolved silicic acid (Si(OH)<sub>4</sub>) using a manual colorimetric method (Krause et al. 2009). Water for Chlorophyll <em>a</em> was filtered through a 0.45 μm-pore 47mm diameter HAWP Millipore filter, immediately frozen, and analyzed on shore (&lt;2 weeks) using an acetone extraction/acidification method (Lomas et al. 2019). For biogenic silica analysis, seawater was filtered through a 1.2 μm-pore polycarbonate filter (47 mm diameter) and frozen immediately. On shore, filters were dried and analyzed using a sodium-carbonate time course digestion, to correct for lithogenic silica interference, in polymethylpentene tubes (Pickering et al. in review). In 2016, NaOH digestions were also done for biogenic silica, followed by an HF digestion to quantify lithogenic silica as in Krause et al. (2009). Diatom abundance was quantified by fixing samples with Bouin's solution; in the laboratory, cells were settled in a chamber and enumerated (Utermöhl 1958).</p>
<p>Diatom rate processes were quantified using a radioisotope (<sup>32</sup>Si) and fluorescent dye (PDMPO) tracers.&nbsp; Sample bottles were incubated for 12 or 24 hours in acrylic incubators cooled with continually flowing surface water under a series of neutral density screens to simulate light levels at the depth of collection (i.e. see above). Measurement for ambient (Amb) conditions (i.e. no enrichment of Si(OH)<sub>4</sub>) and enhanced (Enh) conditions (i.e. +20 µM enrichment of Si(OH)<sub>4</sub>) were made at most stations and depths using <sup>32</sup>Si. The gross rate of biogenic silica production was measured using the radioisotope tracer <sup>32</sup>Si with high specific activity (&gt;40 kBq µg Si<sup>-1</sup>) as described in Krause et al. (2011). For PDMPO uptake, dye was added to samples at ambient or enriched Si(OH)<sub>4</sub>, incubated in the same conditions as the <sup>32</sup>Si samples, and processed as in McNair et al. (2015). The net rate of biogenic silica production was calculated from biogenic silica standing stock at the time of sampling and after a 24-hour incubation, under the same conditions as the<sup> 32</sup>Si and PDMPO, as described in Krause et al. (2010).</p>
Funding provided by NSF Division of Ocean Sciences (NSF OCE) Award Number: OCE-1558957 Award URL: https://www.nsf.gov/awardsearch/show-award?AWD_ID=1558957
completed
Jeffrey W. Krause
Dauphin Island Sea Lab
251-861-2141 x2289
101 Bienville Blvd
Dauphin Island
AL
36528
USA
jkrause@disl.edu
pointOfContact
Kanchan Maiti
Louisiana State University Dept. of Oceanography and Coastal Science
225-578-4531
1143 Energy Coast Env Bldg
Baton Rouge
LA
70803
USA
kmaiti@lsu.edu
pointOfContact
asNeeded
Dataset Version: 1
Unknown
Cruise
Cast_Number
Latitude
Longitude
ISO_DateTime_UTC
Date_Local
Time_Local
Station_Number
Bottom_Depth
Actual_Depth
Rosette_Bottle
Target_pct_lo
Phosphate
Nitrate_Nitrite
Nitrite
Ammonium
TDN
Silicate
Pheophytin
Chlorophyll_a
bSi
LSi
Total_Diatom_Abundance
Rho_Net
Rho_Net_Stdev
Uptake_32Si_rho_Amb
Uptake_32Si_Vb_Amb
Uptake_32Si_rho_Enh
Uptake_32Si_Vb_Enh
PDMPO_Uptake_rho_Amb
PDMPO_Uptake_Blank_Amb
PDMPO_Uptake_rho_Enh
PDMPO_Uptake_Blank_Enh
Temperature
Salinity
Oxygen
Beam_Transmission
Beam_Attenuation
Fluorescence_Chl
PAR_Irradiance
Trilogy fluorometer (Turner Designs)
GM 25 Multicounters (Risø National Laboratory, Technical University of Denmark)
Skalar autoanalyzer
theme
None, User defined
cruise name
cast
latitude
longitude
ISO_DateTime_UTC
date_local
time_local
station
depth_bottom
depth
Niskin bottle number
No BCO-DMO term
reactive phosphorus (PO4)
nitrate plus nitrite
Nitrite
Ammonium
Total Dissolved Nitrogen
Silicate (reactive silica)
total phaeopigment
chlorophyll a
biogenic silica concentration
diatom abundance
rate of biogenic silica production
standard deviation
specific rate of biogenic silica production
instrument_blank
water temperature at measurement depth
salinity
dissolved Oxygen
transmission
beam attenuation
fluorescence
PAR
featureType
BCO-DMO Standard Parameters
Fluorometer
GM multicounter
Nutrient Autoanalyzer
instrument
BCO-DMO Standard Instruments
PE17-20
PE17-04
service
Deployment Activity
Northern Gulf of Mexico Shelf
place
Locations
otherRestrictions
otherRestrictions
Access Constraints: none. Use Constraints: Please follow guidelines at: http://www.bco-dmo.org/terms-use Distribution liability: Under no circumstances shall BCO-DMO be liable for any direct, incidental, special, consequential, indirect, or punitive damages that result from the use of, or the inability to use, the materials in this data submission. If you are dissatisfied with any materials in this data submission your sole and exclusive remedy is to discontinue use.
The biotic and abiotic controls on the Silicon cycle in the northern Gulf of Mexico
https://osprey.bco-dmo.org/project/712667
The biotic and abiotic controls on the Silicon cycle in the northern Gulf of Mexico
<p><em>NSF Award Abstract:</em><br />
The Louisiana Shelf system in the northern Gulf of Mexico is fed by the Mississippi River and its many tributaries which contribute large quantities of nutrients from agricultural fertilizer to the region. Input of these nutrients, especially nitrogen, has led to eutrophication. Eutrophication is the process wherein a body of water such as the Louisiana Shelf becomes enriched in dissolved nutrients that increase phytoplankton growth which eventually leads to decreased oxygen levels in bottom waters. This has certainly been observed in this area, and diatoms, a phytoplankton which represents the base of the food chain, have shown variable silicon/nitrogen (Si/N) ratios. Because diatoms create their shells from silicon, their growth is controlled not only by nitrogen inputs but the availability of silicon. Lower Si/N ratios are showing that silicon may be playing an increasingly important role in regulating diatom production in the system. For this reason, a scientist from the University of South Alabama will determine the biogeochemical processes controlling changes in Si/N ratios in the Louisiana Shelf system. One graduate student on their way to a doctorate degree and three undergraduate students will be supported and trained as part of this project. Also, four scholarships for low-income, high school students from Title 1 schools will get to participate in a month-long summer Marine Science course at the Dauphin Island Sea Laboratory and be included in the research project. The study has significant societal benefits given this is an area where $2.4 trillion gross domestic product revenue is tied up in coastal resources. Since diatoms are at the base of the food chain that is the biotic control on said coastal resources, the growth of diatoms in response to eutrophication is important to study.</p>
<p>Eutrophication of the Mississippi River and its tributaries has the potential to alter the biological landscape of the Louisiana Shelf system in the northern Gulf of Mexico by influencing the Si/N ratios below those that are optimal for diatom growth. A scientist from the University of South Alabama believes the observed changes in the Si/N ratio may indicate silicon now plays an important role in regulating diatom production in the system. As such, understanding the biotic and abiotic processes controlling the silicon cycle is crucial because diatoms dominate at the base of the food chain in this highly productive region. The study will focus on following issues: (1) the importance of recycled silicon sources on diatom production; (2) can heavily-silicified diatoms adapt to changing Si/N ratios more effectively than lightly-silicified diatoms; and (3) the role of reverse weathering in sequestering silicon thereby reducing diffusive pore-water transport. To attain these goals, a new analytical approach, the PDMPO method (compound 2-(4-pyridyl)-5-((4-(2-dimethylaminoethylamino-carbamoyl)methoxy)phenyl)oxazole) that quantitatively measures taxa-specific silica production would be used.</p>
CLASiC
largerWorkCitation
project
eng; USA
oceans
Northern Gulf of Mexico Shelf
-91.6109
-89.45227
28.2633
29.07107
2016-08-28
2017-05-12
Northern Gulf of Mexico, specifically the Louisiana Shelf region dominated by the discharge of the Mississippi River on the western side of the delta
0
BCO-DMO catalogue of parameters from Water column data sampled aboard the R/V Pelican during August and September 2016 and May 2017 in Northern Gulf of Mexico, specifically the Louisiana Shelf region dominated by the discharge of the Mississippi River plume.
Biological and Chemical Oceanography Data Management Office (BCO-DMO)
Unavailable
508-289-2009
WHOI MS#36
Woods Hole
MA
02543
USA
info@bco-dmo.org
http://www.bco-dmo.org
Monday - Friday 8:00am - 5:00pm
For questions regarding this resource, please contact BCO-DMO via the email address provided.
pointOfContact
http://lod.bco-dmo.org/id/dataset-parameter/822928.rdf
Name: Cruise
Units: unitless
Description: <p>Name of specific cruise, no units</p>
http://lod.bco-dmo.org/id/dataset-parameter/822929.rdf
Name: Cast_Number
Units: unitless
Description: <p>CTD Number (chronological)</p>
http://lod.bco-dmo.org/id/dataset-parameter/822930.rdf
Name: Latitude
Units: decimal degrees
Description: <p>Latitude of hydrocast</p>
http://lod.bco-dmo.org/id/dataset-parameter/822931.rdf
Name: Longitude
Units: decimal degrees
Description: <p>Longitude of hydrocast</p>
http://lod.bco-dmo.org/id/dataset-parameter/822932.rdf
Name: ISO_DateTime_UTC
Units: YYYY-MM-DDTHH:MM:SS[.xx]Z
Description: <p>Date/Time (UTC) ISO formatted</p>
http://lod.bco-dmo.org/id/dataset-parameter/822933.rdf
Name: Date_Local
Units: YYYY-MM-DD
Description: <p>Local date of hydrocast</p>
http://lod.bco-dmo.org/id/dataset-parameter/822934.rdf
Name: Time_Local
Units: HH:MM
Description: <p>Local time of hydrocast</p>
http://lod.bco-dmo.org/id/dataset-parameter/822935.rdf
Name: Station_Number
Units: unitless
Description: <p>specific to cruise</p>
http://lod.bco-dmo.org/id/dataset-parameter/822936.rdf
Name: Bottom_Depth
Units: meter (m)
Description: <p>depth of water</p>
http://lod.bco-dmo.org/id/dataset-parameter/822937.rdf
Name: Actual_Depth
Units: meter (m)
Description: <p>Niskin bottle sample depth</p>
http://lod.bco-dmo.org/id/dataset-parameter/822938.rdf
Name: Rosette_Bottle
Units: unitless
Description: <p>Niskin Bottle number(s) for specific depth </p>
http://lod.bco-dmo.org/id/dataset-parameter/822939.rdf
Name: Target_pct_lo
Units: % lo
Description: <p>Percent irradiance, relative to just below surface (Io), at sample depth</p>
http://lod.bco-dmo.org/id/dataset-parameter/822940.rdf
Name: Phosphate
Units: umol/L
Description: <p>soluble reactive phosphorus</p>
http://lod.bco-dmo.org/id/dataset-parameter/822941.rdf
Name: Nitrate_Nitrite
Units: umol/L
Description: <p>dissolved nitrate plus nitrite</p>
http://lod.bco-dmo.org/id/dataset-parameter/822942.rdf
Name: Nitrite
Units: umol/L
Description: <p>dissolved nitrite</p>
http://lod.bco-dmo.org/id/dataset-parameter/822943.rdf
Name: Ammonium
Units: umol/L
Description: <p>dissolved ammonium</p>
http://lod.bco-dmo.org/id/dataset-parameter/822944.rdf
Name: TDN
Units: umol/L
Description: <p>total dissolved nitrogen</p>
http://lod.bco-dmo.org/id/dataset-parameter/822945.rdf
Name: Silicate
Units: umol/L
Description: <p>dissolved silicate</p>
http://lod.bco-dmo.org/id/dataset-parameter/822946.rdf
Name: Pheophytin
Units: ug/L
Description: <p>degraded phaeopigments</p>
http://lod.bco-dmo.org/id/dataset-parameter/822947.rdf
Name: Chlorophyll_a
Units: ug/L
Description: <p>chlorophyll a pigment</p>
http://lod.bco-dmo.org/id/dataset-parameter/822948.rdf
Name: bSi
Units: umol Si/L
Description: <p>particulate biogenic silica</p>
http://lod.bco-dmo.org/id/dataset-parameter/822949.rdf
Name: LSi
Units: umol Si/L
Description: <p>particulate lithogenic silica</p>
http://lod.bco-dmo.org/id/dataset-parameter/822950.rdf
Name: Total_Diatom_Abundance
Units: cells/L
Description: <p>diatom abundance</p>
http://lod.bco-dmo.org/id/dataset-parameter/822951.rdf
Name: Rho_Net
Units: umol Si/L/d
Description: <p>Average rate of net biogenic silica production</p>
http://lod.bco-dmo.org/id/dataset-parameter/822952.rdf
Name: Rho_Net_Stdev
Units: umol Si/L/d
Description: <p>Standard deviation for rate of net biogenic silica production</p>
http://lod.bco-dmo.org/id/dataset-parameter/822953.rdf
Name: Uptake_32Si_rho_Amb
Units: umol Si/L/d
Description: <p>32Si-based Gross biogenic silica production at ambient silicate</p>
http://lod.bco-dmo.org/id/dataset-parameter/822954.rdf
Name: Uptake_32Si_Vb_Amb
Units: d-1
Description: <p>32Si-based Biomass-normalized biogenic silica production at ambient silicate</p>
http://lod.bco-dmo.org/id/dataset-parameter/822955.rdf
Name: Uptake_32Si_rho_Enh
Units: umol Si/L/d
Description: <p>32Si-based Gross biogenic silica production at +20uM silicate above ambient</p>
http://lod.bco-dmo.org/id/dataset-parameter/822956.rdf
Name: Uptake_32Si_Vb_Enh
Units: d-1
Description: <p>32Si-based Biomass-normalized biogenic silica production at +20uM silicate above ambient</p>
http://lod.bco-dmo.org/id/dataset-parameter/822957.rdf
Name: PDMPO_Uptake_rho_Amb
Units: nmol PDMPO/L/d
Description: <p>PDMPO-based Gross biogenic silica production proxy at ambient silicate</p>
http://lod.bco-dmo.org/id/dataset-parameter/822958.rdf
Name: PDMPO_Uptake_Blank_Amb
Units: RFU
Description: <p>PDMPO-blank value at ambient silicate</p>
http://lod.bco-dmo.org/id/dataset-parameter/822959.rdf
Name: PDMPO_Uptake_rho_Enh
Units: nmol PDMPO/L/d
Description: <p>PDMPO-based Gross biogenic silica production proxy at +20uM silicate above ambient</p>
http://lod.bco-dmo.org/id/dataset-parameter/822960.rdf
Name: PDMPO_Uptake_Blank_Enh
Units: RFU
Description: <p>PDMPO-blank value at +20uM silicate above ambient</p>
http://lod.bco-dmo.org/id/dataset-parameter/822961.rdf
Name: Temperature
Units: degrees Celsius
Description: <p>CTD Temperature</p>
http://lod.bco-dmo.org/id/dataset-parameter/822962.rdf
Name: Salinity
Units: PSU
Description: <p>CTD Salinity, Practical</p>
http://lod.bco-dmo.org/id/dataset-parameter/822963.rdf
Name: Oxygen
Units: mg/l
Description: <p>CTD Oxygen sensor</p>
http://lod.bco-dmo.org/id/dataset-parameter/822964.rdf
Name: Beam_Transmission
Units: percent (%)
Description: <p>Beam Transmission on WET Labs C-Star</p>
http://lod.bco-dmo.org/id/dataset-parameter/822965.rdf
Name: Beam_Attenuation
Units: 1/m
Description: <p>Beam Attenuation on WET Labs C-Star</p>
http://lod.bco-dmo.org/id/dataset-parameter/822966.rdf
Name: Fluorescence_Chl
Units: ug/l
Description: <p>Chlorophyll Fluorescence</p>
http://lod.bco-dmo.org/id/dataset-parameter/822967.rdf
Name: PAR_Irradiance
Units: uE/m2/s
Description: <p>Photosynthetically Active Radiation/Irradiance</p>
GB/NERC/BODC > British Oceanographic Data Centre, Natural Environment Research Council, United Kingdom
Biological and Chemical Oceanography Data Management Office (BCO-DMO)
Unavailable
508-289-2009
WHOI MS#36
Woods Hole
MA
02543
USA
info@bco-dmo.org
http://www.bco-dmo.org
Monday - Friday 8:00am - 5:00pm
For questions regarding this resource, please contact BCO-DMO via the email address provided.
pointOfContact
35220
https://darchive.mblwhoilibrary.org/bitstream/1912/26161/1/dataset-822048_clasic-water-column__v1.tsv
download
https://doi.org/10.26008/1912/bco-dmo.822048.1
download
onLine
dataset
<p>Hydrocasts were conducted at identified stations. A SeaBird CTD and rosette system, owned and maintained by Louisiana Universities Marine Consortium (LUMCON), operating institution for the R/V Pelican, was used for sampling. Calibration information can be found associated with the CTD data. Unless otherwise stated, samples used for rate measurements were collected based on the percent irradiance relative to that just below the surface.</p>
<p>Water was sampled from Niskin bottles and pooled into 10 L acid-cleaned carboys. For inorganic nutrients, water was filtered using 0.6 μm pore size polycarbonate membrane and immediately frozen until analysis. Filtered water was analyzed for total dissolved nitrogen (TDN), nitrate+nitrite (NO<sub>3</sub> + NO<sub>2</sub>), nitrite, soluble reactive phosphate (SRP), and ammonium (NH<sub>4</sub>) colorimetrically using Skalar autoanalyzer (Dzwonkowski et al. 2017), and for dissolved silicic acid (Si(OH)<sub>4</sub>) using a manual colorimetric method (Krause et al. 2009). Water for Chlorophyll <em>a</em> was filtered through a 0.45 μm-pore 47mm diameter HAWP Millipore filter, immediately frozen, and analyzed on shore (&lt;2 weeks) using an acetone extraction/acidification method (Lomas et al. 2019). For biogenic silica analysis, seawater was filtered through a 1.2 μm-pore polycarbonate filter (47 mm diameter) and frozen immediately. On shore, filters were dried and analyzed using a sodium-carbonate time course digestion, to correct for lithogenic silica interference, in polymethylpentene tubes (Pickering et al. in review). In 2016, NaOH digestions were also done for biogenic silica, followed by an HF digestion to quantify lithogenic silica as in Krause et al. (2009). Diatom abundance was quantified by fixing samples with Bouin's solution; in the laboratory, cells were settled in a chamber and enumerated (Utermöhl 1958).</p>
<p>Diatom rate processes were quantified using a radioisotope (<sup>32</sup>Si) and fluorescent dye (PDMPO) tracers.&nbsp; Sample bottles were incubated for 12 or 24 hours in acrylic incubators cooled with continually flowing surface water under a series of neutral density screens to simulate light levels at the depth of collection (i.e. see above). Measurement for ambient (Amb) conditions (i.e. no enrichment of Si(OH)<sub>4</sub>) and enhanced (Enh) conditions (i.e. +20 µM enrichment of Si(OH)<sub>4</sub>) were made at most stations and depths using <sup>32</sup>Si. The gross rate of biogenic silica production was measured using the radioisotope tracer <sup>32</sup>Si with high specific activity (&gt;40 kBq µg Si<sup>-1</sup>) as described in Krause et al. (2011). For PDMPO uptake, dye was added to samples at ambient or enriched Si(OH)<sub>4</sub>, incubated in the same conditions as the <sup>32</sup>Si samples, and processed as in McNair et al. (2015). The net rate of biogenic silica production was calculated from biogenic silica standing stock at the time of sampling and after a 24-hour incubation, under the same conditions as the<sup> 32</sup>Si and PDMPO, as described in Krause et al. (2010).</p>
Specified by the Principal Investigator(s)
<p>Data were processed in Microsoft Excel.</p>
<p>BCO-DMO Data Manager Processing Notes:<br />
* added a conventional header with dataset name, PI name, version date<br />
* modified parameter names to conform with BCO-DMO naming conventions<br />
* blank values in this dataset are displayed as "nd" for "no data."&nbsp; nd is the default missing data identifier in the BCO-DMO system.<br />
* removed all spaces in headers and replaced with underscores<br />
* removed all units from headers<br />
* converted dates to ISO Format yyyy-mm-dd<br />
* merged Date_Zulu and Time_Zulu to create ISO_DateTime_UTC and then removed Zulu columns<br />
* set Types for each data column<br />
* merged the CLASiC 2016 and 2017 Water Column data files into one dataset<br />
* replaced - and , in Rosette_Bottle column with ;</p>
<p>&nbsp;</p>
Specified by the Principal Investigator(s)
asNeeded
7.x-1.1
Biological and Chemical Oceanography Data Management Office (BCO-DMO)
Unavailable
508-289-2009
WHOI MS#36
Woods Hole
MA
02543
USA
info@bco-dmo.org
http://www.bco-dmo.org
Monday - Friday 8:00am - 5:00pm
For questions regarding this resource, please contact BCO-DMO via the email address provided.
pointOfContact
Trilogy fluorometer (Turner Designs)
Trilogy fluorometer (Turner Designs)
PI Supplied Instrument Name: Trilogy fluorometer (Turner Designs) PI Supplied Instrument Description:Quantification of Chlorophyll a and bulk PDMPO were done using a Trilogy fluorometer (Turner Designs). For Chlorophyll a, an acidification-method (acetone and HCl matrix) module was used; for PDMPO, a crude-oil module was used with a sample matrix of hydrofluoric acid and boric acid. Chlorophyll a was calibrated using a certified standard, PDMPO was calibrated using a sequential addition of stock dye purchased from the vendor. Instrument Name: Fluorometer Instrument Short Name:Fluorometer Instrument Description: 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. Community Standard Description: http://vocab.nerc.ac.uk/collection/L05/current/113/
GM 25 Multicounters (Risø National Laboratory, Technical University of Denmark)
GM 25 Multicounters (Risø National Laboratory, Technical University of Denmark)
PI Supplied Instrument Name: GM 25 Multicounters (Risø National Laboratory, Technical University of Denmark) PI Supplied Instrument Description:Quantification of 32Si activity was done on a GM 25 Multicounters (Risø National Laboratory, Technical University of Denmark), each are configured to analyze five samples simultaneously. System setup includes an anti-coincidence module, which with considerable lead shielding reduces background activity to Instrument Name: GM multicounter Instrument Short Name: Instrument Description: A gas flow multicounter (GM multicounter) is used for counting low-level beta doses. GM multicounters can be used for gas proportional counting of 32Si to 32P. For more information about GM multicounter usage see Krause et. al. 2011.
Skalar autoanalyzer
Skalar autoanalyzer
PI Supplied Instrument Name: Skalar autoanalyzer PI Supplied Instrument Description:Nutrients were analyzed colorimetrically using Skalar autoanalyzer, except for dissolved silicic acid (Si(OH)4) using a manual colorimetric method on a Genesys 10S UV-Vis spectrophotometer. Similarly, biogenic silica was digested in an alkaline solution (to solubilize particles) and analyzed as Si(OH)4 spectrophotometrically. Instrument Name: Nutrient Autoanalyzer Instrument Short Name:Nutrient Autoanalyzer Instrument Description: 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. Community Standard Description: http://vocab.nerc.ac.uk/collection/L05/current/LAB04/
Cruise: PE17-20
PE17-20
R/V Pelican
Community Standard Description
International Council for the Exploration of the Sea
R/V Pelican
vessel
PE17-20
Jeffrey W. Krause
Dauphin Island Sea Lab
Cruise: PE17-04
PE17-04
R/V Pelican
Community Standard Description
International Council for the Exploration of the Sea
R/V Pelican
vessel
PE17-04
Jeffrey W. Krause
Dauphin Island Sea Lab
R/V Pelican
Community Standard Description
International Council for the Exploration of the Sea
R/V Pelican
vessel