http://lod.bco-dmo.org/id/dataset/2532
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
2010-06-16
ISO 19115-2 Geographic Information - Metadata - Part 2: Extensions for Imagery and Gridded Data
ISO 19115-2:2009(E)
Low level Nitrate concentrations from TM or CTD casts from R/V Thomas G. Thompson TT043, TT053 cruises in the Arabian Sea in 1995 (U.S. JGOFS Arabian Sea project)
2001-05-23
publication
2001-05-23
revision
BCO-DMO Linked Data URI
2001-05-23
creation
http://lod.bco-dmo.org/id/dataset/2532
Dr Christopher Garside
Bigelow Laboratory for Ocean Sciences
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: Garside, C. (2001) Low level Nitrate concentrations from TM or CTD casts from R/V Thomas G. Thompson TT043, TT053 cruises in the Arabian Sea in 1995 (U.S. JGOFS Arabian Sea project). Biological and Chemical Oceanography Data Management Office (BCO-DMO). (Version May 23, 2001 ) Version Date 2001-05-23 [if applicable, indicate subset used]. http://lod.bco-dmo.org/id/dataset/2532 [access date]
Low level Nitrate concentrations from TM or CTD casts Dataset Description: <p>Low level Nitrate concentrations from TM or CTD casts</p> Methods and Sampling: <p>See Platform deployments for cruise specific documentation</p>
Funding provided by National Science Foundation (NSF) Award Number: unknown Arabian Sea NSF
completed
Dr Christopher Garside
Bigelow Laboratory for Ocean Sciences
180 McKown Pt. Road P.O. Box 475
West Boothbay Harbor
ME
04575-0475
USA
pointOfContact
asNeeded
Dataset Version: May 23, 2001
Unknown
event
sta
sta_std
cast
bot
depth
NO3_nano
press
Trace Metal Bottle
theme
None, User defined
event
No BCO-DMO term
cast
depth
water pressure
featureType
BCO-DMO Standard Parameters
Trace Metal Bottle
instrument
BCO-DMO Standard Instruments
TT043
TT053
service
Deployment Activity
U.S. JGOFS Arabian Sea
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.
U.S. Joint Global Ocean Flux Study
http://usjgofs.whoi.edu/
U.S. Joint Global Ocean Flux Study
The United States Joint Global Ocean Flux Study was a national component of international JGOFS and an integral part of global climate change research.
The U.S. launched the Joint Global Ocean Flux Study (JGOFS) in the late 1980s to study the ocean carbon cycle. An ambitious goal was set to understand the controls on the concentrations and fluxes of carbon and associated nutrients in the ocean. A new field of ocean biogeochemistry emerged with an emphasis on quality measurements of carbon system parameters and interdisciplinary field studies of the biological, chemical and physical process which control the ocean carbon cycle. As we studied ocean biogeochemistry, we learned that our simple views of carbon uptake and transport were severely limited, and a new "wave" of ocean science was born. U.S. JGOFS has been supported primarily by the U.S. National Science Foundation in collaboration with the National Oceanic and Atmospheric Administration, the National Aeronautics and Space Administration, the Department of Energy and the Office of Naval Research. U.S. JGOFS, ended in 2005 with the conclusion of the Synthesis and Modeling Project (SMP).
U.S. JGOFS
largerWorkCitation
program
U.S. JGOFS Arabian Sea
http://usjgofs.whoi.edu/research/arabian.html
U.S. JGOFS Arabian Sea
<p>The U.S. Arabian Sea Expedition which began in September 1994 and ended in January 1996, had three major components: a U.S. JGOFS Process Study, supported by the National Science Foundation (NSF); Forced Upper Ocean Dynamics, an Office of Naval Research (ONR) initiative; and shipboard and aircraft measurements supported by the National Aeronautics and Space Administration (NASA). The Expedition consisted of 17 cruises aboard the R/V Thomas Thompson, year-long moored deployments of five instrumented surface buoys and five sediment-trap arrays, aircraft overflights and satellite observations. Of the seventeen ship cruises, six were allocated to repeat process survey cruises, four to SeaSoar mapping cruises, six to mooring and benthic work, and a single calibration cruise which was essentially conducted in transit to the Arabian Sea.</p>
Arabian Sea
largerWorkCitation
project
eng; USA
oceans
U.S. JGOFS Arabian Sea
2001-05-23
Arabian Sea
0
BCO-DMO catalogue of parameters from Low level Nitrate concentrations from TM or CTD casts from R/V Thomas G. Thompson TT043, TT053 cruises in the Arabian Sea in 1995 (U.S. JGOFS Arabian Sea 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
http://lod.bco-dmo.org/id/dataset-parameter/9950.rdf
Name: event
Units: dimensionless
Description: <p>event number from event log</p>
http://lod.bco-dmo.org/id/dataset-parameter/9951.rdf
Name: sta
Units: unknown
Description: <p>station number from event log</p>
http://lod.bco-dmo.org/id/dataset-parameter/9952.rdf
Name: sta_std
Units: unknown
Description: <p>Arabian Sea standard station identifier</p>
http://lod.bco-dmo.org/id/dataset-parameter/9953.rdf
Name: cast
Units: dimensionless
Description: <p>cast number from event log</p>
http://lod.bco-dmo.org/id/dataset-parameter/9954.rdf
Name: bot
Units: unknown
Description: <p>bottle number from trace metal cast</p>
http://lod.bco-dmo.org/id/dataset-parameter/9955.rdf
Name: depth
Units: meters
Description: <p>observed sample depth</p>
http://lod.bco-dmo.org/id/dataset-parameter/9956.rdf
Name: NO3_nano
Units: nanomoles/liter
Description: <p>low level nitrate concentration</p>
http://lod.bco-dmo.org/id/dataset-parameter/9957.rdf
Name: press
Units: meters
Description: <p>observed sample depth</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
916
https://datadocs.bco-dmo.org/file/B1mxKqkc7nYqWG/low_level_NO3_TT043.csv
low_level_NO3_TT043.csv
version May 23, 2001
Christopher Garside
Low Level Nitrate Measurements from TM Casts
Thomas Thompson cruise TTN-043; Process Cruise 1
download
3343
https://datadocs.bco-dmo.org/file/P6EP2LBIZm7kJz/low_level_NO3_TT053.csv
low_level_NO3_TT053.csv
version May 23, 2001
Christopher Garside
Low Level Nitrate Measurements from CTD rosette casts
Thomas Thompson cruise TTN-053; Process Cruise 6
download
https://osprey.bco-dmo.org/dataset/2532/data/download
download
onLine
dataset
<p>See Platform deployments for cruise specific documentation</p>
from Cruise: TT043 <pre>
<b> PI:</b> Christopher Garside
<b> of:</b> Bigelow Laboratory
<b> dataset:</b> Low level Nitrate concentrations from TM casts
<b>dates:</b> January 15, 1995 to January 29, 1995
<b>location:</b> N: 17.6829 S: 9.9986 W: 58.8353 E: 68.7499
<b> project/cruise:</b> Arabian Sea/TN043 - Process Cruise 1 (Late NE Monsoon)
<b> ship:</b> Thomas Thompson
</pre>
from Cruise: TT053 <pre>
<b>PI:</b> Christopher Garside
<b>of:</b> Bigelow Laboratory
<b>dataset:</b> Low level Nitrate concentrations from CTD casts
<b>dates:</b> October 30, 1995 to November 21, 1995
<b>location:</b> N: 23.9123 S: 10.0848 W: 56.4858 E: 67.1666
<b>project/cruise:</b> Arabian Sea/TN053 - Process Cruise 6 (bio-optics)
<b>ship:</b> Thomas Thompson
Samples were obtained from the CTD rosette. The trace metal-clean
(TM) rosette package was lost on a previous cruise.
</pre>
Specified by the Principal Investigator(s)
<h2>Garside's Methodology for Low Level Nitrate Measurements</h2>
<pre>
In many oceanic systems subject to seasonal nutrient supply, nutrient
concentrations in the euphotic zone periodically fall below the
detection limit of colorimetric methods, and low level detection
methods are required for their analysis.
During Process Cruise 1 and 6 samples were taken for nitrate analysis
at the nano-molar concentration level as part of the 15N isotope
studies done by McCarthy and Nevins. McCarthy and Nevins provided the
samples for shore based analysis. Samples were taken from the TM/CTD
into c.a. 25 cc scintillation vials pre-rinsed several times with
sample. Vials were 2/3 filled and 1cc of concentrated sulfuric acid was
added to stop biological activity. Filtration was not employed because
the potential for contamination at low concentrations generally exceeds
the likelihood of particulate contamination problems. Samples were
stored refrigerated in the dark, except during transit from Oman to
BLOS. Acid blanks in DIW and DIW blanks were taken to check
preservative contamination.
Samples were analyzed with the method described by Garside (1982) with
the following modifications. The reagents were degassed on a separate
helium impinger allowing a higher analytical rate; the three way
stopcock was replaced with solenoid valves controlled by a computer
program; and the integration was achieved with an A:D converter signal
supplied to the computer program.
Calibration was based on the addition of ul quantities of a 1 uM
standard to an ASW reagent matrix mimicking the sample matrix, and a
linear response (0 -100 nM) was established relative to calibration
blanks prior to sample analysis. Additional standards were run
periodically during each run to check that the analytical response was
not deteriorating. Data reduction involved computing the linear
regression of integrator signal versus standard concentration, and
employing this regression with the sample integrator resposnse to
compute sample concentrations. The standard error of the estimate for
these regressions was 1 - 2 nM using 10ml samples (appropriate for the
0-100nM range) in a total of 14 runs. Higher concentrations required
lesser sample volumes and the reagent matrix was compensated with ASW
to maintain a final SW/ASW volume of 10ml. For these samples the
standard error is proportionately larger, but still at c.a. 1-2% of
their concentration.
A total of 659 samples in duplicate, DIW and DIW plus acid blanks were
analyzed. Generally blanks were satisfactory, with few exceptions, but
several samples contained contaminants, which often were absent on
re-analysis suggesting that they were particulate, or otherwise
non-homogeneous. The signal from these contaminants provided a broad
signal peak lasting for 10 - 20 minutes, completely obscuring the NOx
signal which they in no way resembled, and cost many hours of lost
time. Had the analyses been run on board ship, the problem would have
been identified and filtration employed, demonstrating one of the
perils of sample preservation and later analysis ashore. Nevertheless,
no sample was entirely lost, and the lower of very disparate duplicates
was taken to be correct. Thus, single (lower) values are archived for
each sample.
In the 150 - 1500 nM range we have compared NOx analysis with the CFA
colorimetric analyses, and on both cruises the CFA concentrations fall
in the range of 0 - 0.2 uM higher than the NOx data. Since the
difference is within the precision of the CFA, and the data are
obviously skewed because negative concentrations are precluded, we
conclude that the two data sets are consistent.
Garside C., 1982. A chemiluminescent technique for the determination of
nanomolar concentrations of nitrate and nitrite in seawater. Marine
Chemistry 11. 159-167.
</pre>
from Cruise: TT043 <h2>Garside's Methodology for Low Level Nitrate Measurements</h2>
<pre>
In many oceanic systems subject to seasonal nutrient supply, nutrient
concentrations in the euphotic zone periodically fall below the
detection limit of colorimetric methods, and low level detection
methods are required for their analysis.
During Process Cruise 1 and 6 samples were taken for nitrate analysis
at the nano-molar concentration level as part of the 15N isotope
studies done by McCarthy and Nevins. McCarthy and Nevins provided the
samples for shore based analysis. Samples were taken from the TM/CTD
into c.a. 25 cc scintillation vials pre-rinsed several times with
sample. Vials were 2/3 filled and 1cc of concentrated sulfuric acid was
added to stop biological activity. Filtration was not employed because
the potential for contamination at low concentrations generally exceeds
the likelihood of particulate contamination problems. Samples were
stored refrigerated in the dark, except during transit from Oman to
BLOS. Acid blanks in DIW and DIW blanks were taken to check
preservative contamination.
Samples were analyzed with the method described by Garside (1982) with
the following modifications. The reagents were degassed on a separate
helium impinger allowing a higher analytical rate; the three way
stopcock was replaced with solenoid valves controlled by a computer
program; and the integration was achieved with an A:D converter signal
supplied to the computer program.
Calibration was based on the addition of ul quantities of a 1 uM
standard to an ASW reagent matrix mimicking the sample matrix, and a
linear response (0 -100 nM) was established relative to calibration
blanks prior to sample analysis. Additional standards were run
periodically during each run to check that the analytical response was
not deteriorating. Data reduction involved computing the linear
regression of integrator signal versus standard concentration, and
employing this regression with the sample integrator resposnse to
compute sample concentrations. The standard error of the estimate for
these regressions was 1 - 2 nM using 10ml samples (appropriate for the
0-100nM range) in a total of 14 runs. Higher concentrations required
lesser sample volumes and the reagent matrix was compensated with ASW
to maintain a final SW/ASW volume of 10ml. For these samples the
standard error is proportionately larger, but still at c.a. 1-2% of
their concentration.
A total of 659 samples in duplicate, DIW and DIW plus acid blanks were
analyzed. Generally blanks were satisfactory, with few exceptions, but
several samples contained contaminants, which often were absent on
re-analysis suggesting that they were particulate, or otherwise
non-homogeneous. The signal from these contaminants provided a broad
signal peak lasting for 10 - 20 minutes, completely obscuring the NOx
signal which they in no way resembled, and cost many hours of lost
time. Had the analyses been run on board ship, the problem would have
been identified and filtration employed, demonstrating one of the
perils of sample preservation and later analysis ashore. Nevertheless,
no sample was entirely lost, and the lower of very disparate duplicates
was taken to be correct. Thus, single (lower) values are archived for
each sample.
In the 150 - 1500 nM range we have compared NOx analysis with the CFA
colorimetric analyses, and on both cruises the CFA concentrations fall
in the range of 0 - 0.2 uM higher than the NOx data. Since the
difference is within the precision of the CFA, and the data are
obviously skewed because negative concentrations are precluded, we
conclude that the two data sets are consistent.
Garside C., 1982. A chemiluminescent technique for the determination of
nanomolar concentrations of nitrate and nitrite in seawater. Marine
Chemistry 11. 159-167.
</pre>
from Cruise: TT053 <h2>Garside's Methodology for Low Level Nitrate Measurements</h2>
<pre>
In many oceanic systems subject to seasonal nutrient supply, nutrient
concentrations in the euphotic zone periodically fall below the
detection limit of colorimetric methods, and low level detection
methods are required for their analysis.
During Process Cruise 1 and 6 samples were taken for nitrate analysis
at the nano-molar concentration level as part of the 15N isotope
studies done by McCarthy and Nevins. McCarthy and Nevins provided the
samples for shore based analysis. Samples were taken from the TM/CTD
into c.a. 25 cc scintillation vials pre-rinsed several times with
sample. Vials were 2/3 filled and 1cc of concentrated sulfuric acid was
added to stop biological activity. Filtration was not employed because
the potential for contamination at low concentrations generally exceeds
the likelihood of particulate contamination problems. Samples were
stored refrigerated in the dark, except during transit from Oman to
BLOS. Acid blanks in DIW and DIW blanks were taken to check
preservative contamination.
Samples were analyzed with the method described by Garside (1982) with
the following modifications. The reagents were degassed on a separate
helium impinger allowing a higher analytical rate; the three way
stopcock was replaced with solenoid valves controlled by a computer
program; and the integration was achieved with an A:D converter signal
supplied to the computer program.
Calibration was based on the addition of ul quantities of a 1 uM
standard to an ASW reagent matrix mimicking the sample matrix, and a
linear response (0 -100 nM) was established relative to calibration
blanks prior to sample analysis. Additional standards were run
periodically during each run to check that the analytical response was
not deteriorating. Data reduction involved computing the linear
regression of integrator signal versus standard concentration, and
employing this regression with the sample integrator resposnse to
compute sample concentrations. The standard error of the estimate for
these regressions was 1 - 2 nM using 10ml samples (appropriate for the
0-100nM range) in a total of 14 runs. Higher concentrations required
lesser sample volumes and the reagent matrix was compensated with ASW
to maintain a final SW/ASW volume of 10ml. For these samples the
standard error is proportionately larger, but still at c.a. 1-2% of
their concentration.
A total of 659 samples in duplicate, DIW and DIW plus acid blanks were
analyzed. Generally blanks were satisfactory, with few exceptions, but
several samples contained contaminants, which often were absent on
re-analysis suggesting that they were particulate, or otherwise
non-homogeneous. The signal from these contaminants provided a broad
signal peak lasting for 10 - 20 minutes, completely obscuring the NOx
signal which they in no way resembled, and cost many hours of lost
time. Had the analyses been run on board ship, the problem would have
been identified and filtration employed, demonstrating one of the
perils of sample preservation and later analysis ashore. Nevertheless,
no sample was entirely lost, and the lower of very disparate duplicates
was taken to be correct. Thus, single (lower) values are archived for
each sample.
In the 150 - 1500 nM range we have compared NOx analysis with the CFA
colorimetric analyses, and on both cruises the CFA concentrations fall
in the range of 0 - 0.2 uM higher than the NOx data. Since the
difference is within the precision of the CFA, and the data are
obviously skewed because negative concentrations are precluded, we
conclude that the two data sets are consistent.
Garside C., 1982. A chemiluminescent technique for the determination of
nanomolar concentrations of nitrate and nitrite in seawater. Marine
Chemistry 11. 159-167.
</pre>
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
Trace Metal Bottle
Trace Metal Bottle
PI Supplied Instrument Name: Trace Metal Bottle PI Supplied Instrument Description:Trace Metal (TM) Rosette bottles Instrument Name: Trace Metal Bottle Instrument Short Name:TM Bottle Instrument Description: Trace metal (TM) clean rosette bottle used for collecting trace metal clean seawater samples. Community Standard Description: http://vocab.nerc.ac.uk/collection/L05/current/30/
Cruise: TT043
TT043
R/V Thomas G. Thompson
Community Standard Description
International Council for the Exploration of the Sea
R/V Thomas G. Thompson
vessel
TT043
Michael R. Roman
University of Maryland Center for Environmental Science
http://osprey.bcodmo.org/datasetDeployment.cfm?ddid=2580&did=353&flag=view
Report describing TT043
Cruise: TT053
TT053
R/V Thomas G. Thompson
Community Standard Description
International Council for the Exploration of the Sea
R/V Thomas G. Thompson
vessel
TT053
William M. Balch
University of Miami
R/V Thomas G. Thompson
Community Standard Description
International Council for the Exploration of the Sea
R/V Thomas G. Thompson
vessel