http://lod.bco-dmo.org/id/dataset/3308
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
2010-07-26
ISO 19115-2 Geographic Information - Metadata - Part 2: Extensions for Imagery and Gridded Data
ISO 19115-2:2009(E)
Sulphur Hexafluoride (SF6) from Station/Niskin bottle sort from NOAA Ship Ronald H. Brown RB-08-02 in the Southwest Atlantic sector of the Southern Ocean near South Georgia Island in 2008 (SO_GasEx project)
2010-02-16
publication
2010-02-16
revision
BCO-DMO Linked Data URI
2010-02-16
creation
http://lod.bco-dmo.org/id/dataset/3308
David T. Ho
University of Hawai'i
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: Ho, D. T. (2010) Sulphur Hexafluoride (SF6) from Station/Niskin bottle sort from NOAA Ship Ronald H. Brown RB-08-02 in the Southwest Atlantic sector of the Southern Ocean near South Georgia Island in 2008 (SO_GasEx project). Biological and Chemical Oceanography Data Management Office (BCO-DMO). (Version 16 Feb 2010) Version Date 2010-02-16 [if applicable, indicate subset used]. http://lod.bco-dmo.org/id/dataset/3308 [access date]
SF6 Discrete - Station/Niskin Sort Dataset Description: <p>SF6 Discrete - Station/Niskin Sort<br />
Analysis of discrete samples for SF6<br />
Samples collected from CTD casts, from underway scientific<br />
seawater line, and from submerged water pump</p> Methods and Sampling: <p><b>See: </b><a href="http://bcodata.whoi.edu/SO-GasEx/SO_GasEx_Cruise_Report.pdf">SO-GasEx cruise report, Section 5.3.3 ppgs 19-20</a> <br />
<br />
<b>Operation description:</b><br />
<i>Sampling times and locations:</i><br />
Sampled all CTD casts where Niskin bottles were tripped.<br />
One deep cast to 4600m, two mid-depth casts to 1500m, four<br />
shallow casts to 100m, and other casts usually to 500m.<br />
See CTD cast logs and bottle files for specific times, locations, and bottles for each cast.<br />
See event log for times and locations when sampled underway seawater line.<br />
<br />
<i>Overall sampling strategy:</i><br />
Normally collected one sample from each depth that might contain<br />
the released SF6, plus three - six samples deeper. All available<br />
depths were sampled on the first four casts and on any later cast<br />
that was shallower than 500m. If multiple Niskins were tripped<br />
at a given depth, hydrography sampled only one of these. Duplicate<br />
samples were drawn from a Niskin, normally in the mixed layer, on<br />
nearly every cast. The first Niskin of a cast that was sampled<br />
was the deepest Helium sample, and the sampling continued in order<br />
to the surface Niskin. The deeper Niskins for SF6 sampling were<br />
done next, starting at the deepest.<br />
<br />
<i>Sampling technique:</i><br />
The discrete samples were collected in 550 ml borosilicate glass bottles<br />
with ground glass stoppers. A sample bottle was shaken with 30-40 ml of<br />
water; then inverted and rinsed with 10-20 ml of water. The bottle was<br />
filled from the bottom with ~800 ml of bubble free water. The stopper<br />
was put in the bottle ensuring that no gas bubble was enclosed. After<br />
all the samples were collected from a cast, a rubber band was slipped<br />
over the stopper. If the samples were not going to be analyzed within<br />
10 hours, the glass bottles were stored in water.<br />
<br />
<i>Analytical method:</i><br />
The samples were analyzed on an instrument patterned after Law et.al. [1998]<br />
and built in 1998 at AOML. About 269 ml of sample water was sucked into an<br />
evacuated chamber through a showerhead. The SF6 that entered the headspace<br />
during filling and the SF6 that remained dissolved in the water were stripped<br />
with ultra high purity nitrogen onto a Carboxen 1000 trap held at -68 C.<br />
After a little more than 3 minutes of purging, the trap was isolated and heated<br />
to 150 C. The trapped gases were swept onto a 1.5 m x 0.3 cm OD molecular sieve<br />
5A column. The SF6 was separated from oxygen and other gases and was measured<br />
with an electron capture detector (ECD).<br />
<br />
The detector was calibrated using six standards:<br />
- cyl#CA2071- 5.7 pptrillion (v/v)<br />
- cyl#CA2089- 55.1 pptr<br />
- cyl#CA3452- 112.3 pptr<br />
- cyl#CA2060- 166.6 pptr<br />
- cyl#CA2056- 345.0 pptr<br />
- cyl#CA2093- 1109.0 pptr<br />
<br />
The custom software includes a chromatography package from WillStein Software,<br />
which is used for acquisition of the ECD output and to reintegrate peaks.<br />
The SF6 peaks were reintegrated for all blank analyses, water analyses and the<br />
analyses of 5.5 pptr standard. The larger standards had very favorable signal<br />
to noise ratios.<br />
<br />
The pattern of analyses include initial and final groups of standards bracketing<br />
groups of water analyses. The water samples from each cast were typically split<br />
into two groups, each covering the entire water column. Within a group, the<br />
deepest water samples were analyzed before the more concentrated surface water<br />
samples.<br />
<br />
The Typical Analyses Sequence:<br />
- 2-3 gas blanks<br />
- 15-20 gas standards spanning the entire range<br />
- gas blank<br />
- 1-2 stripper blanks<br />
- 7-9 water analyses<br />
- stripper blank<br />
- 1 analysis of 166.6 pptr standard<br />
- stripper blank<br />
- 7-9 water analyses<br />
- [repeat analyses of stripper blanks, 166.p pptr std, and water samples two or three times]<br />
- stripper blank<br />
- gas blank<br />
- 5-15 standards<br />
- 2 gas blanks<br />
<br />
The stripping chamber was evacuated and flushed with nitrogen before the first use.<br />
If the stripping chamber was not going to used for more than 6 hours, it was rinsed<br />
with fresh water and then evacuated and flushed.<br />
<br />
<i>Instrument details:</i><br />
The ECD gas chromatograph is a Shimadzu Mini 2.<br />
The custom software was written with LabView 5.1 in 1998 and revised in 2002.<br />
The reference for a description of the instrument is: Law, C.S, A.J. Watson,<br />
M.J. Liddicoat, and T. Stanton, Sulphur hexafluoride as a tracer of biogeochemical<br />
and physical processes in an open-ocean iron fertilization experiment,<br />
Deep Sea Research II, 45, 977-994, 1998.<br />
<br />
<br />
<b>Operation Log - During Cruise</b><br />
<i>5 - 6 March 2008</i><br />
Attempts were made to use this discrete instrument to quantitate the amount of<br />
SF6 in water actively being bubbled in the dosing tank. All attempts resulted<br />
in peaks much larger than full scale for the ECD. The excessive amounts of SF6<br />
were easily swept out of the instrument.<br />
<br />
<i>Station 3</i><br />
one sample of a duplicate pair is stored for 23 hours before analyses - precision<br />
of duplicates was good<br />
<br />
<i>Station 5</i><br />
one sample of a duplicate pair is stored for 24 hours before analyses,<br />
another sample of a different duplicate pair is stored for 52 hours.<br />
Precision of the 52-hour duplicates was poorer than normal.<br />
<br />
<i>Station 8</i><br />
These samples were stored overnight before analyses as were some earlier<br />
stations and many later stations. This was the first station for which<br />
some outgassing bubbles in some samples was noticed. These tiny bubbles<br />
(&lt;0.1 ml total volume) were not present when the bottle was sealed and<br />
did not seem to bias the SF6 results.<br />
<br />
<i>Station 10</i><br />
The sampling order was more discontinuous than normal to accommodate noble<br />
gas sampling. For the collection of samples from the underway system after<br />
station 10, the outflow tube of the MicroTSG in the hydro lab sink was put<br />
in the bottom of a sample bottle and left to overfill the bottle for at least<br />
2 minutes (flow at 1.3 liter/min).<br />
<br />
<i>13 March 2008</i><br />
During analysis of sample bottle 15 (stn 9, N 22) the Labview program was in its<br />
'pause and prompt' state longer than usual. The analytical system evacuates the<br />
stripping chamber and then presents a prompt screen until a &quot;start&quot; button is<br />
pushed by the analyst. The analyst has to draw some of the sample through the<br />
inlet tube and solenoid valve before pushing the &quot;start&quot; button. If the 'pause<br />
and prompt' state is long, the chance of outside air leaking into the chamber is<br />
greater (potential higher blank).<br />
<br />
<i>15 March 2008</i><br />
In an effort to have comparable results from the underway and discrete SF6 analytical<br />
systems, the single SF6 gaseous standard for the underway system (58.2 pptr) was run<br />
on the discrete system and three of the discrete standards (166.6, 55.1, and 5.7 pptr)<br />
were run on the underway system.<br />
<br />
<i>18 March 2008</i><br />
Both system and stripper blanks are significantly higher. The second dosing tank is<br />
being bubbled on the afterdeck, and the lab air was enriched in SF6. No leaky fittings<br />
could be found on the analytical system despite a day of searching. After ~48 hrs the<br />
blanks decreased, but remained higher than at the start of the cruise.<br />
<br />
<i>22 March 2008</i><br />
Last night was the first station (16) on the second patch. I took a sample from the<br />
underway system to quickly check the strength of ECD signal. When the sample was run,<br />
the peak went offscale. The ECD was set for 2nAmp standing current through station 14.<br />
I decreased the setting to 1 nAmp. To span the largest peak from the water analyses<br />
of station 16, I had to trap 6 regular gas loops (1.606 ml) of the most concentrated<br />
standard (1109 pptr). I am concerned about peak shape changes while trapping that many<br />
loops sequentially, so I put the second gas sample loop valve back on the system.<br />
[it was taken off during a previous experiment.] I made a large loop (~7 ml) and created<br />
new analytical methods to adequately flush the loop while and after filling it with<br />
standard or blank gas. I will have to determine the exact volume of the new gas loop<br />
back at AOML.<br />
<br />
<i>25 March 2008</i><br />
Try again to locate the source of the elevated blanks, especially the stripper blanks.<br />
Still, could not find any fitting that leaked. At the end of a day of analyses,<br />
the chamber is rinsed with fresh water to reduce the corrosion on the solenoid valves<br />
attached to the drain and vacuum connections. I stripped a sample of the fresh water<br />
on the ship and discovered that it was as concentrated as the surface 'in-patch' water<br />
(&gt;200 fmole/liter). The chamber will continue to be rinsed with fresh water, but it<br />
will go through a couple evacuate-and-purge cycles before being left for the night.<br />
[no reduction in the blanks developed, but the procedure was continued.]<br />
<br />
<i>25 March 2008</i><br />
During analyses of sample bottles 202 (stn 25, N 3), 206 (stn 25, N 9) and 10<br />
(stn 26, N 18) the Labview program was in its 'pause and prompt' state longer than usual.<br />
<br />
<i>26 March 2008</i><br />
During analysis of sample bottles 203 (stn 27, N 8) the Labview program was in its<br />
'pause and prompt' state longer than usual.<br />
<br />
<i>28 March 2008</i><br />
During analysis of sample bottles 2 (stn 32, submerged pump) the Labview program was<br />
in its 'pause and prompt' state longer than usual.<br />
<br />
<i>29 March 2008</i><br />
During analyses of sample bottles 2 (stn 35, N 7) and 17 (stn 35, underway system)<br />
the Labview program was in its 'pause and prompt' state longer than usual.<br />
<br />
<i>30 March 2008</i><br />
During analysis of sample bottles 202 (stn 37, N 6) the Labview program was in its<br />
'pause and prompt' state longer than usual. During analysis of sample bottles 206<br />
(stn 37, N 10) there seemed to be air in the inlet line and the water level in the<br />
stripping chamber seemed lower than usual. Maybe the inlet tube was not submerged<br />
as low as it should have been [but how would the Pt wire water sensors stop the water<br />
flow automatically - splashes with gas going in?].<br />
<br />
<i>31 March 2008</i><br />
During sampling, the stopper on bottle 203 (stn 41, N 3) was removed ~3 minutes after<br />
sampling so some more a little more water from the niskin was gently added to the very<br />
top of the bottle and the stopper reinserted.<br />
<br />
<i>03 April 2008</i><br />
During sampling, the stopper on bottle 203 (stn 41, N 3) was removed ~3 minutes after<br />
sampling so some more a little more water from the niskin was gently added to the very<br />
top of the bottle and the stopper reinserted.<br />
<br />
<br />
<b>For Blanks and Cals See: </b><a href="http://bcodata.whoi.edu/SO-GasEx/MDR_13_discrete_SF6_Blanks_and_Cals.pdf">SO-GasEx Discrete SF6 Blanks and Calibration Curves</a></p>
Funding provided by National Oceanic and Atmospheric Administration (NOAA) Award Number: unknown SO_GasEx NOAA
Funding provided by National Aeronautics & Space Administration (NASA) Award Number: unknown SO_GasEx NASA
Funding provided by National Science Foundation (NSF) Award Number: unknown SO_GasEx NSF
completed
David T. Ho
University of Hawai'i
808-956-3311
Department of Oceanography 1000 Pope Rd
Honolulu
HI
96822
USA
ho@hawaii.edu
pointOfContact
asNeeded
Dataset Version: 16 Feb 2010
Unknown
event
date
time
lon
lat
stn_nskn
smpl_btl_num
Helium_Flag
WOCE_QC
comments
year_day_analyzed
WS_area
SF6
precision
station
niskin
year_day_collected
pres
temp
sal
sigma_t
o2
lon_collection
lat_collection
DrawT_minus_C
O2_discrete
O2_satur
CTD Seabird 911plus
theme
None, User defined
event
date
time of day
longitude
latitude
station
bottle
flag
comments
julian_day_yr0
No BCO-DMO term
water pressure
water temperature at measurement depth
salinity
sigma-t
dissolved Oxygen
O2 saturation
featureType
BCO-DMO Standard Parameters
CTD Sea-Bird SBE 911plus
instrument
BCO-DMO Standard Instruments
RB-08-02
service
Deployment Activity
Southwest Atlantic sector of the Southern Ocean, nominally at 50°S 40°W, near South Georgia Island
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.
Ocean Carbon and Biogeochemistry
http://us-ocb.org/
Ocean Carbon and Biogeochemistry
The Ocean Carbon and Biogeochemistry (OCB) program focuses on the ocean's role as a component of the global Earth system, bringing together research in geochemistry, ocean physics, and ecology that inform on and advance our understanding of ocean biogeochemistry. The overall program goals are to promote, plan, and coordinate collaborative, multidisciplinary research opportunities within the U.S. research community and with international partners. Important OCB-related activities currently include: the Ocean Carbon and Climate Change (OCCC) and the North American Carbon Program (NACP); U.S. contributions to IMBER, SOLAS, CARBOOCEAN; and numerous U.S. single-investigator and medium-size research projects funded by U.S. federal agencies including NASA, NOAA, and NSF.
The scientific mission of OCB is to study the evolving role of the ocean in the global carbon cycle, in the face of environmental variability and change through studies of marine biogeochemical cycles and associated ecosystems.
The overarching OCB science themes include improved understanding and prediction of: 1) oceanic uptake and release of atmospheric CO2 and other greenhouse gases and 2) environmental sensitivities of biogeochemical cycles, marine ecosystems, and interactions between the two.
The OCB Research Priorities (updated January 2012) include: ocean acidification; terrestrial/coastal carbon fluxes and exchanges; climate sensitivities of and change in ecosystem structure and associated impacts on biogeochemical cycles; mesopelagic ecological and biogeochemical interactions; benthic-pelagic feedbacks on biogeochemical cycles; ocean carbon uptake and storage; and expanding low-oxygen conditions in the coastal and open oceans.
OCB
largerWorkCitation
program
United States Surface Ocean Lower Atmosphere Study
http://www.us-solas.org/
United States Surface Ocean Lower Atmosphere Study
The Surface Ocean Lower Atmosphere Study (SOLAS) program is designed to enable researchers from different disciplines to interact and investigate the multitude of processes and interactions between the coupled ocean and atmosphere.
Oceanographers and atmospheric scientists are working together to improve understanding of the fate, transport, and feedbacks of climate relevant compounds, and also weather and hazards that are affected by processes at the surface ocean.
Oceanographers and atmospheric scientists are working together to improve understanding of the fate, transport, and feedbacks of climate relevant compounds.
Physical, chemical, and biological research near the ocean-atmosphere interface must be performed in synergy to extend our current knowledge to adequately understand and forecast changes on short and long time frames and over local and global spatial scales.
The findings obtained from SOLAS are used to improve knowledge at process scale that will lead to better quantification of fluxes of climate relevant compounds such as CO2, sulfur and nitrogen compounds, hydrocarbons and halocarbons, as well as dust, energy and momentum. This activity facilitates a fundamental understanding to assist the societal needs for climate change, environmental health, weather prediction, and national security.
The US SOLAS program is a component of the International SOLAS program where collaborations are forged with investigators around the world to examine SOLAS issues ubiquitous to the world's oceans and atmosphere.
» International SOLAS Web site
Science Implementation Strategy Reports
US-SOLAS (4 MB PDF file)
Other SOLAS reports are available for download from the US SOLAS Web site
U.S. SOLAS
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program
Southern Ocean Gas Exchange Experiment
http://so-gasex.org/
Southern Ocean Gas Exchange Experiment
<p>The Southern Ocean Gas Exchange Experiment (SO-GasEx; also known as GasEx III) took place in the Southwest Atlantic sector of the Southern Ocean (nominally at 50°S, 40°W, near South Georgia Island) in austral fall of 2008 (February 29-April 12, 2008) on the <a href="http://www.moc.noaa.gov/rb/">NOAA ship <em>Ronald H. Brown</em></a>. SO-GasEX is funded by NOAA, NSF and NASA.</p>
<p>The research objectives for Southern Ocean GasEx are to answer the following questions:</p>
<ul>
<li>What are the gas transfer velocities at high winds?</li>
<li>What is the effect of fetch on the gas transfer?</li>
<li>How do other non-direct wind effects influence gas transfer?</li>
<li>How do changing pCO2 and DMS levels affect the air-sea CO2 and DMS flux, respectively in the same locale?</li>
<li>Are there better predictors of gas exchange in the Southern Ocean other than wind?</li>
<li>What is the near surface horizontal and vertical variability in turbulence, pCO2, and other relevant biochemical and physical parameters?</li>
<li>How do biological processes influence pCO2 and gas exchange?</li>
<li>Do the different disparate estimates of fluxes agree, and if not why?</li>
<li>With the results from Southern Ocean GasEx, can we reconcile the current discrepancy between model based CO2 flux estimates and observation based estimates?</li>
</ul>
<p> </p>
<h3>Related files</h3>
<p><a href="http://bcodata.whoi.edu/SO-GasEx/SO_GasEx_Cruise_Report.pdf">SO-GasEx cruise report</a><br />
<a href="http://bcodata.whoi.edu/SO-GasEx/SO_GasEx_Science_Plan.pdf">SO-GasEx Science Plan</a><br />
<a href="http://bcodata.whoi.edu/SO-GasEx/SO_GasEx_Implementation_Plan.pdf">SO-GasEx Implementation Plan</a></p>
<p>The SO-GasEx cruise report and Science and Implementation plans, may also be available at <a href="http://so-gasex.org/science.html" target="_blank"">the SO-GasEx science Web page</a>.</p>
SO_GasEx
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project
eng; USA
oceans
Southwest Atlantic sector of the Southern Ocean, nominally at 50°S 40°W, near South Georgia Island
2010-02-16
Southwest Atlantic sector of the Southern Ocean (nominally at 50°S, 40°W, near South Georgia Island)
0
BCO-DMO catalogue of parameters from Sulphur Hexafluoride (SF6) from Station/Niskin bottle sort from NOAA Ship Ronald H. Brown RB-08-02 in the Southwest Atlantic sector of the Southern Ocean near South Georgia Island in 2008 (SO_GasEx 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/21097.rdf
Name: event
Units: YDAHHMM
Description: <p>Unique event number</p>
http://lod.bco-dmo.org/id/dataset-parameter/21098.rdf
Name: date
Units: YYYYMMDD
Description: <p>Date (UTC)</p>
http://lod.bco-dmo.org/id/dataset-parameter/21099.rdf
Name: time
Units: HHMM
Description: <p>Time (UTC)</p>
http://lod.bco-dmo.org/id/dataset-parameter/21100.rdf
Name: lon
Units: decimal degrees
Description: <p>Station longitude in decimal degrees (West is negative)</p>
http://lod.bco-dmo.org/id/dataset-parameter/21101.rdf
Name: lat
Units: decimal degrees
Description: <p>Station latitude in decimal degrees (South is negative)</p>
http://lod.bco-dmo.org/id/dataset-parameter/21102.rdf
Name: stn_nskn
Units: integer
Description: <p>The CTD station number followed by a 0; followed by the niskin number. e.g. stn_nskn 1001 is CTD station 1; niskin 1.</p>
http://lod.bco-dmo.org/id/dataset-parameter/21103.rdf
Name: smpl_btl_num
Units: integer
Description: <p>Sample bottle number</p>
http://lod.bco-dmo.org/id/dataset-parameter/21104.rdf
Name: Helium_Flag
Units: integer
Description: <p>Helium Flag (0=yes)</p>
http://lod.bco-dmo.org/id/dataset-parameter/21105.rdf
Name: WOCE_QC
Units: integer
Description: <p>2 = good analysis. 3 = questionable analysis - the result does not seem to fit into the context of surrounding results whether or not any unusual conditions were observed during sampling or analysis. 4 = bad analysis - the result does not fit into the context of surrounding results and an unusual condition was observed.</p>
http://lod.bco-dmo.org/id/dataset-parameter/21106.rdf
Name: comments
Units: text
Description: <p>data collection comments</p>
http://lod.bco-dmo.org/id/dataset-parameter/21107.rdf
Name: year_day_analyzed
Units: decimal day
Description: <p>year day analyzed</p>
http://lod.bco-dmo.org/id/dataset-parameter/21108.rdf
Name: WS_area
Units: integer
Description: <p>WS area</p>
http://lod.bco-dmo.org/id/dataset-parameter/21109.rdf
Name: SF6
Units: fmole/Liter
Description: <p>SF6</p>
http://lod.bco-dmo.org/id/dataset-parameter/21110.rdf
Name: precision
Units: percentage
Description: <p>Precision percentage: For 2 analyses percentage is difference divided by average; For >2 analyses percentage is standard deviation divided by average</p>
http://lod.bco-dmo.org/id/dataset-parameter/21111.rdf
Name: station
Units: integer
Description: <p>SO-GasEx CTD Station Id</p>
http://lod.bco-dmo.org/id/dataset-parameter/21112.rdf
Name: niskin
Units: integer
Description: <p>niskin bottle number</p>
http://lod.bco-dmo.org/id/dataset-parameter/21113.rdf
Name: year_day_collected
Units: decimal day
Description: <p>year day collected</p>
http://lod.bco-dmo.org/id/dataset-parameter/21114.rdf
Name: pres
Units: decibars
Description: <p>pressure from CTD</p>
http://lod.bco-dmo.org/id/dataset-parameter/21115.rdf
Name: temp
Units: degrees celcius
Description: <p>temperature from CTD</p>
http://lod.bco-dmo.org/id/dataset-parameter/21116.rdf
Name: sal
Units: dimensionless
Description: <p>salinity from CTD</p>
http://lod.bco-dmo.org/id/dataset-parameter/21117.rdf
Name: sigma_t
Units: kilograms/meter^3
Description: <p>sigma_t (density) from CTD</p>
http://lod.bco-dmo.org/id/dataset-parameter/21118.rdf
Name: o2
Units: umol/kg
Description: <p>dissolved Oxygen</p>
http://lod.bco-dmo.org/id/dataset-parameter/21119.rdf
Name: lon_collection
Units: decimal degrees
Description: <p>Collection longitude in decimal degrees (West is negative)</p>
http://lod.bco-dmo.org/id/dataset-parameter/21120.rdf
Name: lat_collection
Units: decimal degrees
Description: <p>Collection latitude in decimal degrees (South is negative)</p>
http://lod.bco-dmo.org/id/dataset-parameter/21121.rdf
Name: DrawT_minus_C
Units: (tbd)
Description: <p>DrawT-C</p>
http://lod.bco-dmo.org/id/dataset-parameter/21122.rdf
Name: O2_discrete
Units: umol/kg
Description: <p>Oxygen discrete</p>
http://lod.bco-dmo.org/id/dataset-parameter/21123.rdf
Name: O2_satur
Units: milliliters/liter
Description: <p>Oxygen saturated</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
105708
https://datadocs.bco-dmo.org/file/yppz43lc7qAqBv/Disc_SF6_stn.csv
Disc_SF6_stn.csv
Primary data file for dataset ID 3308
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<p><b>See: </b><a href="http://bcodata.whoi.edu/SO-GasEx/SO_GasEx_Cruise_Report.pdf">SO-GasEx cruise report, Section 5.3.3 ppgs 19-20</a> <br />
<br />
<b>Operation description:</b><br />
<i>Sampling times and locations:</i><br />
Sampled all CTD casts where Niskin bottles were tripped.<br />
One deep cast to 4600m, two mid-depth casts to 1500m, four<br />
shallow casts to 100m, and other casts usually to 500m.<br />
See CTD cast logs and bottle files for specific times, locations, and bottles for each cast.<br />
See event log for times and locations when sampled underway seawater line.<br />
<br />
<i>Overall sampling strategy:</i><br />
Normally collected one sample from each depth that might contain<br />
the released SF6, plus three - six samples deeper. All available<br />
depths were sampled on the first four casts and on any later cast<br />
that was shallower than 500m. If multiple Niskins were tripped<br />
at a given depth, hydrography sampled only one of these. Duplicate<br />
samples were drawn from a Niskin, normally in the mixed layer, on<br />
nearly every cast. The first Niskin of a cast that was sampled<br />
was the deepest Helium sample, and the sampling continued in order<br />
to the surface Niskin. The deeper Niskins for SF6 sampling were<br />
done next, starting at the deepest.<br />
<br />
<i>Sampling technique:</i><br />
The discrete samples were collected in 550 ml borosilicate glass bottles<br />
with ground glass stoppers. A sample bottle was shaken with 30-40 ml of<br />
water; then inverted and rinsed with 10-20 ml of water. The bottle was<br />
filled from the bottom with ~800 ml of bubble free water. The stopper<br />
was put in the bottle ensuring that no gas bubble was enclosed. After<br />
all the samples were collected from a cast, a rubber band was slipped<br />
over the stopper. If the samples were not going to be analyzed within<br />
10 hours, the glass bottles were stored in water.<br />
<br />
<i>Analytical method:</i><br />
The samples were analyzed on an instrument patterned after Law et.al. [1998]<br />
and built in 1998 at AOML. About 269 ml of sample water was sucked into an<br />
evacuated chamber through a showerhead. The SF6 that entered the headspace<br />
during filling and the SF6 that remained dissolved in the water were stripped<br />
with ultra high purity nitrogen onto a Carboxen 1000 trap held at -68 C.<br />
After a little more than 3 minutes of purging, the trap was isolated and heated<br />
to 150 C. The trapped gases were swept onto a 1.5 m x 0.3 cm OD molecular sieve<br />
5A column. The SF6 was separated from oxygen and other gases and was measured<br />
with an electron capture detector (ECD).<br />
<br />
The detector was calibrated using six standards:<br />
- cyl#CA2071- 5.7 pptrillion (v/v)<br />
- cyl#CA2089- 55.1 pptr<br />
- cyl#CA3452- 112.3 pptr<br />
- cyl#CA2060- 166.6 pptr<br />
- cyl#CA2056- 345.0 pptr<br />
- cyl#CA2093- 1109.0 pptr<br />
<br />
The custom software includes a chromatography package from WillStein Software,<br />
which is used for acquisition of the ECD output and to reintegrate peaks.<br />
The SF6 peaks were reintegrated for all blank analyses, water analyses and the<br />
analyses of 5.5 pptr standard. The larger standards had very favorable signal<br />
to noise ratios.<br />
<br />
The pattern of analyses include initial and final groups of standards bracketing<br />
groups of water analyses. The water samples from each cast were typically split<br />
into two groups, each covering the entire water column. Within a group, the<br />
deepest water samples were analyzed before the more concentrated surface water<br />
samples.<br />
<br />
The Typical Analyses Sequence:<br />
- 2-3 gas blanks<br />
- 15-20 gas standards spanning the entire range<br />
- gas blank<br />
- 1-2 stripper blanks<br />
- 7-9 water analyses<br />
- stripper blank<br />
- 1 analysis of 166.6 pptr standard<br />
- stripper blank<br />
- 7-9 water analyses<br />
- [repeat analyses of stripper blanks, 166.p pptr std, and water samples two or three times]<br />
- stripper blank<br />
- gas blank<br />
- 5-15 standards<br />
- 2 gas blanks<br />
<br />
The stripping chamber was evacuated and flushed with nitrogen before the first use.<br />
If the stripping chamber was not going to used for more than 6 hours, it was rinsed<br />
with fresh water and then evacuated and flushed.<br />
<br />
<i>Instrument details:</i><br />
The ECD gas chromatograph is a Shimadzu Mini 2.<br />
The custom software was written with LabView 5.1 in 1998 and revised in 2002.<br />
The reference for a description of the instrument is: Law, C.S, A.J. Watson,<br />
M.J. Liddicoat, and T. Stanton, Sulphur hexafluoride as a tracer of biogeochemical<br />
and physical processes in an open-ocean iron fertilization experiment,<br />
Deep Sea Research II, 45, 977-994, 1998.<br />
<br />
<br />
<b>Operation Log - During Cruise</b><br />
<i>5 - 6 March 2008</i><br />
Attempts were made to use this discrete instrument to quantitate the amount of<br />
SF6 in water actively being bubbled in the dosing tank. All attempts resulted<br />
in peaks much larger than full scale for the ECD. The excessive amounts of SF6<br />
were easily swept out of the instrument.<br />
<br />
<i>Station 3</i><br />
one sample of a duplicate pair is stored for 23 hours before analyses - precision<br />
of duplicates was good<br />
<br />
<i>Station 5</i><br />
one sample of a duplicate pair is stored for 24 hours before analyses,<br />
another sample of a different duplicate pair is stored for 52 hours.<br />
Precision of the 52-hour duplicates was poorer than normal.<br />
<br />
<i>Station 8</i><br />
These samples were stored overnight before analyses as were some earlier<br />
stations and many later stations. This was the first station for which<br />
some outgassing bubbles in some samples was noticed. These tiny bubbles<br />
(&lt;0.1 ml total volume) were not present when the bottle was sealed and<br />
did not seem to bias the SF6 results.<br />
<br />
<i>Station 10</i><br />
The sampling order was more discontinuous than normal to accommodate noble<br />
gas sampling. For the collection of samples from the underway system after<br />
station 10, the outflow tube of the MicroTSG in the hydro lab sink was put<br />
in the bottom of a sample bottle and left to overfill the bottle for at least<br />
2 minutes (flow at 1.3 liter/min).<br />
<br />
<i>13 March 2008</i><br />
During analysis of sample bottle 15 (stn 9, N 22) the Labview program was in its<br />
'pause and prompt' state longer than usual. The analytical system evacuates the<br />
stripping chamber and then presents a prompt screen until a &quot;start&quot; button is<br />
pushed by the analyst. The analyst has to draw some of the sample through the<br />
inlet tube and solenoid valve before pushing the &quot;start&quot; button. If the 'pause<br />
and prompt' state is long, the chance of outside air leaking into the chamber is<br />
greater (potential higher blank).<br />
<br />
<i>15 March 2008</i><br />
In an effort to have comparable results from the underway and discrete SF6 analytical<br />
systems, the single SF6 gaseous standard for the underway system (58.2 pptr) was run<br />
on the discrete system and three of the discrete standards (166.6, 55.1, and 5.7 pptr)<br />
were run on the underway system.<br />
<br />
<i>18 March 2008</i><br />
Both system and stripper blanks are significantly higher. The second dosing tank is<br />
being bubbled on the afterdeck, and the lab air was enriched in SF6. No leaky fittings<br />
could be found on the analytical system despite a day of searching. After ~48 hrs the<br />
blanks decreased, but remained higher than at the start of the cruise.<br />
<br />
<i>22 March 2008</i><br />
Last night was the first station (16) on the second patch. I took a sample from the<br />
underway system to quickly check the strength of ECD signal. When the sample was run,<br />
the peak went offscale. The ECD was set for 2nAmp standing current through station 14.<br />
I decreased the setting to 1 nAmp. To span the largest peak from the water analyses<br />
of station 16, I had to trap 6 regular gas loops (1.606 ml) of the most concentrated<br />
standard (1109 pptr). I am concerned about peak shape changes while trapping that many<br />
loops sequentially, so I put the second gas sample loop valve back on the system.<br />
[it was taken off during a previous experiment.] I made a large loop (~7 ml) and created<br />
new analytical methods to adequately flush the loop while and after filling it with<br />
standard or blank gas. I will have to determine the exact volume of the new gas loop<br />
back at AOML.<br />
<br />
<i>25 March 2008</i><br />
Try again to locate the source of the elevated blanks, especially the stripper blanks.<br />
Still, could not find any fitting that leaked. At the end of a day of analyses,<br />
the chamber is rinsed with fresh water to reduce the corrosion on the solenoid valves<br />
attached to the drain and vacuum connections. I stripped a sample of the fresh water<br />
on the ship and discovered that it was as concentrated as the surface 'in-patch' water<br />
(&gt;200 fmole/liter). The chamber will continue to be rinsed with fresh water, but it<br />
will go through a couple evacuate-and-purge cycles before being left for the night.<br />
[no reduction in the blanks developed, but the procedure was continued.]<br />
<br />
<i>25 March 2008</i><br />
During analyses of sample bottles 202 (stn 25, N 3), 206 (stn 25, N 9) and 10<br />
(stn 26, N 18) the Labview program was in its 'pause and prompt' state longer than usual.<br />
<br />
<i>26 March 2008</i><br />
During analysis of sample bottles 203 (stn 27, N 8) the Labview program was in its<br />
'pause and prompt' state longer than usual.<br />
<br />
<i>28 March 2008</i><br />
During analysis of sample bottles 2 (stn 32, submerged pump) the Labview program was<br />
in its 'pause and prompt' state longer than usual.<br />
<br />
<i>29 March 2008</i><br />
During analyses of sample bottles 2 (stn 35, N 7) and 17 (stn 35, underway system)<br />
the Labview program was in its 'pause and prompt' state longer than usual.<br />
<br />
<i>30 March 2008</i><br />
During analysis of sample bottles 202 (stn 37, N 6) the Labview program was in its<br />
'pause and prompt' state longer than usual. During analysis of sample bottles 206<br />
(stn 37, N 10) there seemed to be air in the inlet line and the water level in the<br />
stripping chamber seemed lower than usual. Maybe the inlet tube was not submerged<br />
as low as it should have been [but how would the Pt wire water sensors stop the water<br />
flow automatically - splashes with gas going in?].<br />
<br />
<i>31 March 2008</i><br />
During sampling, the stopper on bottle 203 (stn 41, N 3) was removed ~3 minutes after<br />
sampling so some more a little more water from the niskin was gently added to the very<br />
top of the bottle and the stopper reinserted.<br />
<br />
<i>03 April 2008</i><br />
During sampling, the stopper on bottle 203 (stn 41, N 3) was removed ~3 minutes after<br />
sampling so some more a little more water from the niskin was gently added to the very<br />
top of the bottle and the stopper reinserted.<br />
<br />
<br />
<b>For Blanks and Cals See: </b><a href="http://bcodata.whoi.edu/SO-GasEx/MDR_13_discrete_SF6_Blanks_and_Cals.pdf">SO-GasEx Discrete SF6 Blanks and Calibration Curves</a></p>
Specified by the Principal Investigator(s)
<p><b>See: </b><a href="http://bcodata.whoi.edu/SO-GasEx/SO_GasEx_Cruise_Report.pdf">SO-GasEx cruise report, Section 5.3.3 ppgs 19-20</a> <br />
<br />
<b>Data Processing Log - Post Cruise</b><br />
The first step in the data processing is subtracting the appropriate analytical blank<br />
from the raw peak areas: gas blank for standard and air analyses, stripper blank for<br />
the water analyses. The gas and stripper blanks were plotted and appeared to cluster<br />
around different values over separate time periods. This pattern was to be expected<br />
since there was only one analyst, who typically ran the samples from two casts together.<br />
Thus, the analytical system was used for ~1/2 a day and then sat unused for ~1/2 a day.<br />
Nineteen ranges of time were used for blank correction, due primarily to the variability<br />
of the stripper blanks. The same gas blank value was applied in sequentially ranges often.<br />
The applied blank values and a summary of the analytical blank results are provided below.<br />
<br />
The analytical blanks showed no systematic trends for all but one range, so a single blank<br />
value was used for the entire range. Within one time period, the stripper blank clearly<br />
increased and then decreased. Rather than use one value, the applied blank for the water<br />
analyses was a time-weighted linear interpolation between bracketing analytical stripper<br />
blanks. For most of the water and gas analyses, the applied blank was significantly less<br />
than 1% of the sample signal.<br />
<br />
The blank-corrected peak areas for the standard analyses were plotted versus time. The<br />
response of the ECD was fairly stable within the setting used for a patch (i.e. 2 nA standing<br />
current for patch#1; 1 nA standing current for patch#2). Three time periods were chosen<br />
for each setting. Within each time period, a least-squared regression of the standards<br />
produced a 4th degree polynomial equation relating peak area and femtomole SF6. The peak<br />
areas for the seawater analyses were not larger than for the standards; however, there were<br />
some atypical analyses (e.g. tap water after 26 March) that had peaks larger than the<br />
standards in that time period. Since the detector response was similar in the adjoining<br />
time periods, the data for a couple standard runs were copied to adjoining time periods<br />
to extend the standard curves for some atypical analyses. The 4th degree polynomial<br />
equations were used to convert the blank-corrected peak areas for the water analyses to<br />
aqueous concentrations (femtomole / liter).<br />
<br />
The results of the water analyses were examined within the context of the surrounding SF6<br />
analyses, of the titrated oxygen samples, and of the general hydrography. A quality control<br />
flag similar to the WOCE protocol were assigned to each water analysis. There were four<br />
analyses that were deemed 'bad', two of which had observations during analysis to explain<br />
the bad result. There were fifteen analyses that were deemed 'questionable', seven of which<br />
had observations to explain the poor result. The remaining 650 seawater analyses were deemed<br />
'good', though nine analyses had observations that could have explained poor results. The<br />
assignment of a 'bad' quality control flag was conservative so that expected results would<br />
not be excluded from examination by others.<br />
<br />
For the duplicate water samples drawn from niskin bottles, the relative precision was 3.3%<br />
for all 38 duplicate pairs and was 1.4% for the 31 duplicate pairs definitely above background<br />
SF6 concentrations (i.e. &gt;8 fmole SF6/Liter). For the nineteen sets of multiple samples<br />
collected from the underway sea water line the average precision was 5.3%, which reflects<br />
analytical variability as well as changes in the water being sampled. A restrip of a<br />
concentrated water sample was done on nearly every day. All 27 restrips of a water sample<br />
contained 2% or less of the total SF6 extracted from a water sample, so no correction for<br />
stripping efficiency was done.<br />
<br />
<br />
<b>For Blanks and Cals See: </b><a href="http://bcodata.whoi.edu/SO-GasEx/MDR_13_discrete_SF6_Blanks_and_Cals.pdf">SO-GasEx Discrete SF6 Blanks and Calibration Curves</a> <br />
<br />
<b>BCO-DMO Processing Notes</b><br />
- Generated from original file SO-GasEx08_Disc-SF6_Final.xls, Sheet: stn-nsk<br />
<br />
<b>BCO-DMO Edits</b><br />
- parameter names modified to conform to BCO-DMO convention<br />
- event, station, date, time, lon, lat inserted from CTD headers file<br />
- blank cells changed to 'nd'</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
CTD Seabird 911plus
CTD Seabird 911plus
PI Supplied Instrument Name: CTD Seabird 911plus PI Supplied Instrument Description:Instrument Configuration File for SO-GasEx:
PSA file: C:GasExacqSeasave.psa
Date: 02/23/2008
Instrument configuration file: C:GasExconssec_24_1.con
Configuration report for SBE 911plus/917plus CTD
------------------------------------------------
Frequency channels suppressed : 0
Voltage words suppressed : 0
Computer interface : RS-232C
Scans to average : 1
Surface PAR voltage added : No
NMEA position data added : No
Scan time added : Yes
1) Frequency 0, Temperature
Serial number : 4211
Calibrated on : 08-Nov-07
G : 4.38706278e-003
H : 6.46536683e-004
I : 2.23272060e-005
J : 1.77872902e-006
F0 : 1000.000
Slope : 1.00000000
Offset : 0.0000
2) Frequency 1, Conductivity
Serial number : 2887
Calibrated on : 18-Oct-07
G : -1.00439325e+001
H : 1.36330343e+000
I : -2.56289727e-003
J : 2.54823008e-004
CTcor : 3.2500e-006
CPcor : -9.57000000e-008
Slope : 1.00000000
Offset : 0.00000
3) Frequency 2, Pressure, Digiquartz with TC
Serial number : 209
Calibrated on : 09-Jul-07
C1 : -3.920451e+004
C2 : 6.234560e-001
C3 : 1.350570e-002
D1 : 3.894300e-002
D2 : 0.000000e+000
T1 : 3.046303e+001
T2 : -9.018862e-005
T3 : 4.528890e-006
T4 : 3.309590e-009
T5 : 0.000000e+000
Slope : 0.99985000
Offset : 1.00090
AD590M : 1.144000e-002
AD590B : -8.805040e+000
4) Frequency 3, Temperature, 2
Serial number : 1455
Calibrated on : 13-Nov-07
G : 4.84617647e-003
H : 6.77841857e-004
I : 2.60561588e-005
J : 2.02936086e-006
F0 : 1000.000
Slope : 1.00000000
Offset : 0.0000
5) Frequency 4, Conductivity, 2
Serial number : 2882
Calibrated on : 18-Oct-07
G : -1.02006582e+001
H : 1.39961765e+000
I : 7.01158866e-004
J : 2.20787100e-005
CTcor : 3.2500e-006
CPcor : -9.57000000e-008
Slope : 1.00000000
Offset : 0.00000
6) A/D voltage 0, Oxygen, SBE 43
Serial number : 315
Calibrated on : 16-Oct-07p
Equation : Owens-Millard
Coefficients for Owens-Millard:
Soc : 3.6150e-001
Boc : 0.0000
Offset : -0.5838
Tcor : -0.0001
Pcor : 1.35e-004
Tau : 0.0
Coefficients for Murphy-Larson:
Soc : 0.00000e+000
Offset : 0.00000e+000
A : 0.00000e+000
B : 0.00000e+000
C : 0.00000e+000
E : 0.00000e+000
Tau : 2.00000e+000
7) A/D voltage 1, Free
8) A/D voltage 2, Free
9) A/D voltage 3, User Polynomial
Serial number : 8756
Calibrated on :
Sensor name : Metrox
A0 : 12.00000000
A1 : 445.60000000
A2 : 0.00000000
A3 : 0.00000000
10) A/D voltage 4, Free
11) A/D voltage 5, Free
12) A/D voltage 6, Free
13) A/D voltage 7, Free
---------------------------------------------
Pump Control
This setting is only applicable to a custom build of the SBE 9plus.
Enable pump on / pump off commands: NO
---------------------------------------------
Data Acquisition:
Archive data: YES
Delay archiving: NO
Data archive: C:P18_07data
h21731.hex
Timeout (seconds) at startup: 20
Timeout (seconds) between scans: 20
---------------------------------------------
Instrument port configuration:
Port = COM1
Baud rate = 19200
Parity = N
Data bits = 8
Stop bits = 1
---------------------------------------------
Water Sampler Data:
Water Sampler Type: SBE Carousel
Number of bottles: 24
Port: COM2
Enable remote firing: NO
Firing sequence: Sequential
---------------------------------------------
Header information:
Header Choice = Prompt for Header Information
prompt 0 = Cruise: CLIVAR P18 2007
prompt 1 = Ship: NOAA RONALD H. BROWN
prompt 2 = Station/Cast Number:
prompt 3 = Nominal Latitude:
prompt 4 = Nominal Longitude:
---------------------------------------------
TCP/IP - port numbers:
Data acquisition:
Data port: 49163
Status port: 49165
Command port: 49164
Remote bottle firing:
Command port: 49167
Status port: 49168
Remote data publishing:
Converted data port: 49161
Raw data port: 49160
---------------------------------------------
Miscellaneous data for calculations
Depth and Average Sound Velocity
Latitude when NMEA is not available: 0.00000000
Average Sound Velocity
Minimum pressure [db]: 20.00000000
Minimum salinity [psu]: 20.00000000
Pressure window size [db]: 20.00000000
Time window size [s]: 60.00000000
Descent and Acceleration
Window size [s]: 2.00000000
Plume Anomaly
Theta-B: 0.00000000
Salinity-B 0.00000000
Theta-Z / Salinity-Z 0.00000000
Reference pressure [db] 0.00000000
Oxygen
Window size [s]: 2.00000000
Potential Temperature Anomaly
A0: 0.00000000
A1: 0.00000000
A1 Multiplier: Salinity
---------------------------------------------
Serial Data Output:
Output data to serial port: NO
---------------------------------------------
Mark Variables:
Variables:
Digits Variable Name [units]
------ ---------------------
0 Scan Count
4 Pressure, Digiquartz [db]
5 Temperature [ITS-90, deg C]
5 Salinity [PSU]
4 Oxygen, SBE 43 [umol/Kg]
5 Density [sigma-theta, Kg/m^3]
---------------------------------------------
Shared File Output:
Output data to shared file: NO
---------------------------------------------
TCP/IP Output:
Raw data:
Output raw data to socket: NO
XML wrapper and settings: NO
Seconds between raw data updates: 0.00000000
Converted data:
Output converted data to socket: NO
XML format: NO
---------------------------------------------
SBE 11plus Deck Unit Alarms
Enable minimum pressure alarm: NO
Enable maximum pressure alarm: NO
Enable altimeter alarm: NO
---------------------------------------------
SBE 14 Remote Display
Enable SBE 14 Remote Display: NO
---------------------------------------------
Options:
Prompt to save program setup changes: YES
Automatically save program setup changes on exit: NO
Confirm instrument configuration change: YES
Confirm display setup changes: YES
Confirm output file overwrite: YES
Check scan length: YES
Compare serial numbers: YES
Maximized plot may cover Seasave: NO Instrument Name: CTD Sea-Bird SBE 911plus Instrument Short Name:CTD SBE 911plus Instrument Description: The Sea-Bird SBE 911 plus is a type of CTD instrument package for continuous measurement of conductivity, temperature and pressure. The SBE 911 plus includes the SBE 9plus Underwater Unit and the SBE 11plus Deck Unit (for real-time readout using conductive wire) for deployment from a vessel. The combination of the SBE 9 plus and SBE 11 plus is called a SBE 911 plus. The SBE 9 plus uses Sea-Bird's standard modular temperature and conductivity sensors (SBE 3 plus and SBE 4). The SBE 9 plus CTD can be configured with up to eight auxiliary sensors to measure other parameters including dissolved oxygen, pH, turbidity, fluorescence, light (PAR), light transmission, etc.). more information from Sea-Bird Electronics Community Standard Description: http://vocab.nerc.ac.uk/collection/L22/current/TOOL0058/
Cruise: RB-08-02
RB-08-02
Community Standard Description
International Council for the Exploration of the Sea
NOAA Ship Ronald H. Brown
vessel
RB-08-02
Christopher L. Sabine
National Oceanic and Atmospheric Administration
http://bcodata.whoi.edu/SO-GasEx/SO_GasEx_Cruise_Report.pdf
Report describing RB-08-02
Community Standard Description
International Council for the Exploration of the Sea
NOAA Ship Ronald H. Brown
vessel