http://lod.bco-dmo.org/id/dataset/3287
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)
Underway pCO2 from GO System from NOAA Ship Ronald H. Brown cruise RB-08-02 in the Southwest Atlantic sector of the Southern Ocean near South Georgia Island in 2008 (SO_GasEx project)
2009-12-28
publication
2009-12-28
revision
BCO-DMO Linked Data URI
2009-12-28
creation
http://lod.bco-dmo.org/id/dataset/3287
Dr Rik H. Wanninkhof
National Oceanic and Atmospheric Administration
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: Wanninkhof, R. H. (2009) Underway pCO2 from GO System from NOAA Ship Ronald H. Brown cruise 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 28 Dec 2009) Version Date 2009-12-28 [if applicable, indicate subset used]. http://lod.bco-dmo.org/id/dataset/3287 [access date]
CO2 - Underway pCO2 - GO System Dataset Description: <p>SO-GasEx Underway pCO2 data from the General Oceanics System<br />
xCO2 in surface water and atmosphere<br />
In situ fugacity of CO2 in air and surface water and delta fCO2</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 5.4.3 pgs 21-23</a> <br />
<br />
<b>Method:</b><br />
The system was built by General Oceanics (GO) and is described in Pierrot, et al. (2009)<br />
<br />
The three standard gases come from CMDL in Boulder and are directly traceable to the WMO scale.<br />
<br />
<b>Sampling Cycle:</b><br />
The system runs on an cycle during which 3 standard gases, 5 air<br />
samples from the bow tower and 50 surface water samples (from the <br />
equilibrator head space) are analyzed on the following schedule:<br />
<br />
1. Zero and span of Licor<br />
2. Three standard gases<br />
3. Five air samples<br />
4. Fifty equilibrator headspace gas samples<br />
5. Repeat steps 2 - 4 nine more times<br />
6. Restart from step 1<br />
<br />
<b>Standards:</b><br />
SN CA06745, 289.06 ppm;<br />
SN CA05398, 370.90 ppm;<br />
SN CA06352, 411.42 ppm.<br />
<br />
<b>Units:</b><br />
All xCO2 values are reported in parts per million (ppm) and fCO2 values <br />
are reported in microatmospheres (uatm) assuming 100 % humidity at the <br />
equilibrator temperature.<br />
<br />
Notes:<br />
1. Beginning with this cruise, a new pCO2 analytical system was installed<br />
aboard the Brown, built by General Oceanics (GO). The file format has <br />
changed slightly and air values are now included in the file. QC flags now <br />
apply to the fCO2 value for Equ measurements and to the xCO2 value for Atm<br />
measurements. Most measurements with a flag of 4 (bad) are no longer <br />
included in the data file. While the fCO2 value of Equ measurements flagged <br />
3 are questionable, the xCO2 values should be considered good (2). For <br />
details about the system see the master readme file.<br />
<br />
2. Any values outside the range of the standards (289.06, 370.90, &amp; 411.42<br />
ppm) should be considered approximate (within 5 ppm). While individual data <br />
points above 411 or below 289 may not be accurate, the general trends should <br />
be indicative of the seawater chemistry.<br />
<br />
3.Salinity readings from the ship's TSG were bad. Readings from the <br />
Seabird Micro TSG in the Hydro Lab sink were used instead. This was<br />
connected to the old pCO2 analytical system which was running concurrently<br />
with the new system and thus was recorded at lower frequency than either<br />
the data from the ship's computer system (SCS) or the new GO system (1 every<br />
4 - 4-1/2 minutes vs. 1 per minute for SCS and ~ 1 every 2-1/2 minutes for<br />
the GO system). The Micro TSG data were first merged into the data from <br />
the ship's computer system (SCS) with a 4-minute offset to account for the<br />
time it took seawater to travel from the bow intake to the Hydro Lab. This<br />
left numerous gaps in the SCS data file which contains 1-minute averages.<br />
Missing values in the Micro TSG data were interpolated. The Micro TSG data<br />
was then merged into the GO system data.<br />
<br />
4. The uncontaminated seawater system (UCS) was shut down twice while<br />
tracers were being injected as part of the Southern Ocean Gas Exchange<br />
Experiment. The first shutdown occurred from 3/7 at 23:49<br />
to 3/8 at 21:27. The second was from 03:58 to 15:18 on 3/21. Good and<br />
questionable (flags 2 &amp; 3) air values during these periods have been <br />
retained in the data file.<br />
<br />
5. The system was shut down at various times. The longest of these was<br />
from 23:51 on 4/4 to 14:30 on 4/5. Other shut downs were for 1:06 on 3/8 at<br />
01:27, for 0:15 on 3/8 at 21:12, for 1:04 on 3/19 at 19:47, for 0:37 on 4/5<br />
at 20:46, and for 6 minutes (0:06) on 4/8 at 16:32.<br />
<br />
6. There are 2 short gaps in the SCS data file on 3/31 from 23:24 to <br />
23:36 and from 23:40 to 23:57. From 23:24 to 23:57 there is no SST data.<br />
Equ samples in this period have been retained and flagged as 4 because the<br />
xCO2 values appear to be good although no fCO2 computations were done.<br />
<br />
7. The GPS feed to the GO system failed on 4/5 at 20:48 and remained<br />
off until 4/8 at 16:38. Times of measurements during this period were<br />
derived from the PC time, which started 1 minute 49 seconds faster than<br />
GPS and was 3 minutes 52 seconds fast when the GPS came back on. A linear<br />
interpolation was done and 1:49 to 3:52 was added to PC time to produce a<br />
new GPS time. Latitudes and longitudes during this period were merged<br />
from the SCS data.<br />
<br />
8. There were roughly 200 individual dropouts in equilibrator <br />
temperature that were interpolated. About 95% of these were flagged as<br />
2 (good) after examining the fCO2 values. The rest were flagged as 3<br />
(questionable). The subflag field gives the reason for flagging points<br />
as questionable.<br />
<br />
9. Offset between the ship's intake and the system in the Hydro Lab<br />
was problematic. Normally, there is an approximate 3-4 minute delay<br />
between water arriving at the intake and water arriving in the Hydro<br />
Lab. At the beginning of the cruise this held true but by the end, the<br />
temperature values in the Hydro Lab were actually leading the values <br />
for SST from the ship's intake. Consequently, no offset was applied<br />
when merging data from the SCS.<br />
<br />
10. The ship's fluorometer was turned off during this cruise to<br />
reduce the drain on the UCS because many groups were drawing water<br />
from it and one of them had their own multi-spectral fluorometer.<br />
Therefore no fluorometer data is included in the data file.<br />
<br />
<br />
For questions or comments contact:<br />
Bob Castle<br />
4301 Rickenbacker Causeway<br />
Miami, FL 33149<br />
305-361-4418<br />
robert.castle@noaa.gov</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
Dr Rik H. Wanninkhof
National Oceanic and Atmospheric Administration
(305) 361-4379
4301 Rickenbacker Causeway
Miami
FL
33149
USA
Rik.Wanninkhof@noaa.gov
pointOfContact
asNeeded
Dataset Version: 28 Dec 2009
Unknown
Group_Ship
Cruise_ID
JD_GMT
date
time
lon
lat
xCO2_EQU
xCO2_ATM
xCO2_ATM_interpolated
PRES_EQU
PRES_ATM_SSP
TEMP_EQU
SST
SAL
fCO2_SW_SST
fCO2_ATM_interpolated
dfCO2
WOCE_QC_FLAG
QC_SUBFLAG
WATER_FLOW
GAS_FLOW_IR
SHIP_SPEED
SHIP_HEADING_TRUE
AIR_TEMP
WIND_DIR_TRUE
WIND_SPEED_TRUE
WIND_SPEED_REL
WIND_DIR_REL
Licor 6262 analyser
theme
None, User defined
dataset_id
Cruise identfier
julian_day_yr0
date
time of day
longitude
latitude
No BCO-DMO term
sea surface temperature
sea surface salinity
flag
Speed over ground
heading
air temperature
wind_dir
wind_speed
relative wind speed
wind_dir_r
featureType
BCO-DMO Standard Parameters
LI-COR LI-6262 Gas Analyzer
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
largerWorkCitation
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
largerWorkCitation
project
eng; USA
oceans
Southwest Atlantic sector of the Southern Ocean, nominally at 50°S 40°W, near South Georgia Island
2009-12-28
Southwest Atlantic sector of the Southern Ocean (nominally at 50°S, 40°W, near South Georgia Island)
0
BCO-DMO catalogue of parameters from Underway pCO2 from GO System from NOAA Ship Ronald H. Brown cruise 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/20618.rdf
Name: Group_Ship
Units: text
Description: <p>AOML_BROWN for all Ron Brown data</p>
http://lod.bco-dmo.org/id/dataset-parameter/20619.rdf
Name: Cruise_ID
Units: text
Description: <p>RBYYNNGO where YY is the 2 digit year and NN is the cruise number for that year</p>
http://lod.bco-dmo.org/id/dataset-parameter/20620.rdf
Name: JD_GMT
Units: ddd.xxx
Description: <p>Decimal year day</p>
http://lod.bco-dmo.org/id/dataset-parameter/20621.rdf
Name: date
Units: YYYYMMDD
Description: <p>Date (UTC)</p>
http://lod.bco-dmo.org/id/dataset-parameter/20622.rdf
Name: time
Units: HHMMSS
Description: <p>Time (UTC)</p>
http://lod.bco-dmo.org/id/dataset-parameter/20623.rdf
Name: lon
Units: decimal degrees
Description: <p>longitude (West is negative)</p>
http://lod.bco-dmo.org/id/dataset-parameter/20624.rdf
Name: lat
Units: decimal degrees
Description: <p>latitude (South is negative)</p>
http://lod.bco-dmo.org/id/dataset-parameter/20625.rdf
Name: xCO2_EQU
Units: ppm
Description: <p>Mole fraction of CO2 in the equilibrator at equilibrator temperature</p>
http://lod.bco-dmo.org/id/dataset-parameter/20626.rdf
Name: xCO2_ATM
Units: ppm
Description: <p>Mole fraction of CO2 in air</p>
http://lod.bco-dmo.org/id/dataset-parameter/20627.rdf
Name: xCO2_ATM_interpolated
Units: ppm
Description: <p>Bracketing average air values interpolated to time of current Equ measurement</p>
http://lod.bco-dmo.org/id/dataset-parameter/20628.rdf
Name: PRES_EQU
Units: hectopascals
Description: <p>Barometric pressure in the equilibrator</p>
http://lod.bco-dmo.org/id/dataset-parameter/20629.rdf
Name: PRES_ATM_SSP
Units: hectopascals
Description: <p>Barometric pressure from ship's barometer corrected to sea level</p>
http://lod.bco-dmo.org/id/dataset-parameter/20630.rdf
Name: TEMP_EQU
Units: degrees celsius
Description: <p>Equilibrator water temperature</p>
http://lod.bco-dmo.org/id/dataset-parameter/20631.rdf
Name: SST
Units: degrees celsius
Description: <p>Sea surface temperature</p>
http://lod.bco-dmo.org/id/dataset-parameter/20632.rdf
Name: SAL
Units: practical salinity units
Description: <p>Salinity from ship's TSG or Micro TSG in the Hydro Lab</p>
http://lod.bco-dmo.org/id/dataset-parameter/20633.rdf
Name: fCO2_SW_SST
Units: microatmospheres
Description: <p>Fugacity of CO2 in sea water</p>
http://lod.bco-dmo.org/id/dataset-parameter/20634.rdf
Name: fCO2_ATM_interpolated
Units: microatmospheres
Description: <p>Fugacity of CO2 in air interpolated to time of Equ measurement</p>
http://lod.bco-dmo.org/id/dataset-parameter/20635.rdf
Name: dfCO2
Units: microatmospheres
Description: <p>Fugacity of CO2 in sea water - fugacity of CO2 in air</p>
http://lod.bco-dmo.org/id/dataset-parameter/20636.rdf
Name: WOCE_QC_FLAG
Units: integer
Description: <p>Quality control flag for Equ fCO2 values and Atm xCO2 values (2 = good; 3 = questionable; 4 = bad)</p>
http://lod.bco-dmo.org/id/dataset-parameter/20637.rdf
Name: QC_SUBFLAG
Units: text
Description: <p>Subflag text string for values flagged as 3</p>
http://lod.bco-dmo.org/id/dataset-parameter/20638.rdf
Name: WATER_FLOW
Units: liters per minute
Description: <p>Water flow through the equilibrator</p>
http://lod.bco-dmo.org/id/dataset-parameter/20639.rdf
Name: GAS_FLOW_IR
Units: milliliters per minute
Description: <p>Gas flow through the Licor sample cell</p>
http://lod.bco-dmo.org/id/dataset-parameter/20640.rdf
Name: SHIP_SPEED
Units: knots
Description: <p>Ship's speed from the ship's computer system</p>
http://lod.bco-dmo.org/id/dataset-parameter/20641.rdf
Name: SHIP_HEADING_TRUE
Units: degrees
Description: <p>Ship's heading from the ship's computer system in degrees (0 =North; 90 = East; etc)</p>
http://lod.bco-dmo.org/id/dataset-parameter/20642.rdf
Name: AIR_TEMP
Units: degrees celsius
Description: <p>Outside air temperature</p>
http://lod.bco-dmo.org/id/dataset-parameter/20643.rdf
Name: WIND_DIR_TRUE
Units: degrees
Description: <p>Absolute (true) wind direction in degrees</p>
http://lod.bco-dmo.org/id/dataset-parameter/20644.rdf
Name: WIND_SPEED_TRUE
Units: meters per second
Description: <p>Absolute (true) wind speed</p>
http://lod.bco-dmo.org/id/dataset-parameter/20645.rdf
Name: WIND_SPEED_REL
Units: meters per second
Description: <p>Wind speed relative to the ship</p>
http://lod.bco-dmo.org/id/dataset-parameter/20646.rdf
Name: WIND_DIR_REL
Units: degrees
Description: <p>Wind direction relative to the ship</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
3823832
https://datadocs.bco-dmo.org/file/N77GrJlhjEoWDZ/uw_pCO2_GO.csv
uw_pCO2_GO.csv
Primary data file for dataset ID 3287
download
https://osprey.bco-dmo.org/dataset/3287/data/download
download
onLine
dataset
<p><b>See: </b><a href="http://bcodata.whoi.edu/SO-GasEx/SO_GasEx_Cruise_Report.pdf">SO-GasEx cruise report, Section 5.4.3 pgs 21-23</a> <br />
<br />
<b>Method:</b><br />
The system was built by General Oceanics (GO) and is described in Pierrot, et al. (2009)<br />
<br />
The three standard gases come from CMDL in Boulder and are directly traceable to the WMO scale.<br />
<br />
<b>Sampling Cycle:</b><br />
The system runs on an cycle during which 3 standard gases, 5 air<br />
samples from the bow tower and 50 surface water samples (from the <br />
equilibrator head space) are analyzed on the following schedule:<br />
<br />
1. Zero and span of Licor<br />
2. Three standard gases<br />
3. Five air samples<br />
4. Fifty equilibrator headspace gas samples<br />
5. Repeat steps 2 - 4 nine more times<br />
6. Restart from step 1<br />
<br />
<b>Standards:</b><br />
SN CA06745, 289.06 ppm;<br />
SN CA05398, 370.90 ppm;<br />
SN CA06352, 411.42 ppm.<br />
<br />
<b>Units:</b><br />
All xCO2 values are reported in parts per million (ppm) and fCO2 values <br />
are reported in microatmospheres (uatm) assuming 100 % humidity at the <br />
equilibrator temperature.<br />
<br />
Notes:<br />
1. Beginning with this cruise, a new pCO2 analytical system was installed<br />
aboard the Brown, built by General Oceanics (GO). The file format has <br />
changed slightly and air values are now included in the file. QC flags now <br />
apply to the fCO2 value for Equ measurements and to the xCO2 value for Atm<br />
measurements. Most measurements with a flag of 4 (bad) are no longer <br />
included in the data file. While the fCO2 value of Equ measurements flagged <br />
3 are questionable, the xCO2 values should be considered good (2). For <br />
details about the system see the master readme file.<br />
<br />
2. Any values outside the range of the standards (289.06, 370.90, &amp; 411.42<br />
ppm) should be considered approximate (within 5 ppm). While individual data <br />
points above 411 or below 289 may not be accurate, the general trends should <br />
be indicative of the seawater chemistry.<br />
<br />
3.Salinity readings from the ship's TSG were bad. Readings from the <br />
Seabird Micro TSG in the Hydro Lab sink were used instead. This was<br />
connected to the old pCO2 analytical system which was running concurrently<br />
with the new system and thus was recorded at lower frequency than either<br />
the data from the ship's computer system (SCS) or the new GO system (1 every<br />
4 - 4-1/2 minutes vs. 1 per minute for SCS and ~ 1 every 2-1/2 minutes for<br />
the GO system). The Micro TSG data were first merged into the data from <br />
the ship's computer system (SCS) with a 4-minute offset to account for the<br />
time it took seawater to travel from the bow intake to the Hydro Lab. This<br />
left numerous gaps in the SCS data file which contains 1-minute averages.<br />
Missing values in the Micro TSG data were interpolated. The Micro TSG data<br />
was then merged into the GO system data.<br />
<br />
4. The uncontaminated seawater system (UCS) was shut down twice while<br />
tracers were being injected as part of the Southern Ocean Gas Exchange<br />
Experiment. The first shutdown occurred from 3/7 at 23:49<br />
to 3/8 at 21:27. The second was from 03:58 to 15:18 on 3/21. Good and<br />
questionable (flags 2 &amp; 3) air values during these periods have been <br />
retained in the data file.<br />
<br />
5. The system was shut down at various times. The longest of these was<br />
from 23:51 on 4/4 to 14:30 on 4/5. Other shut downs were for 1:06 on 3/8 at<br />
01:27, for 0:15 on 3/8 at 21:12, for 1:04 on 3/19 at 19:47, for 0:37 on 4/5<br />
at 20:46, and for 6 minutes (0:06) on 4/8 at 16:32.<br />
<br />
6. There are 2 short gaps in the SCS data file on 3/31 from 23:24 to <br />
23:36 and from 23:40 to 23:57. From 23:24 to 23:57 there is no SST data.<br />
Equ samples in this period have been retained and flagged as 4 because the<br />
xCO2 values appear to be good although no fCO2 computations were done.<br />
<br />
7. The GPS feed to the GO system failed on 4/5 at 20:48 and remained<br />
off until 4/8 at 16:38. Times of measurements during this period were<br />
derived from the PC time, which started 1 minute 49 seconds faster than<br />
GPS and was 3 minutes 52 seconds fast when the GPS came back on. A linear<br />
interpolation was done and 1:49 to 3:52 was added to PC time to produce a<br />
new GPS time. Latitudes and longitudes during this period were merged<br />
from the SCS data.<br />
<br />
8. There were roughly 200 individual dropouts in equilibrator <br />
temperature that were interpolated. About 95% of these were flagged as<br />
2 (good) after examining the fCO2 values. The rest were flagged as 3<br />
(questionable). The subflag field gives the reason for flagging points<br />
as questionable.<br />
<br />
9. Offset between the ship's intake and the system in the Hydro Lab<br />
was problematic. Normally, there is an approximate 3-4 minute delay<br />
between water arriving at the intake and water arriving in the Hydro<br />
Lab. At the beginning of the cruise this held true but by the end, the<br />
temperature values in the Hydro Lab were actually leading the values <br />
for SST from the ship's intake. Consequently, no offset was applied<br />
when merging data from the SCS.<br />
<br />
10. The ship's fluorometer was turned off during this cruise to<br />
reduce the drain on the UCS because many groups were drawing water<br />
from it and one of them had their own multi-spectral fluorometer.<br />
Therefore no fluorometer data is included in the data file.<br />
<br />
<br />
For questions or comments contact:<br />
Bob Castle<br />
4301 Rickenbacker Causeway<br />
Miami, FL 33149<br />
305-361-4418<br />
robert.castle@noaa.gov</p>
from Cruise: RB-08-02 <p><b>Method:</b><br />
Infrared absorption of dried gas using Licor 6262. Equilibrator volume ~2 L.<br />
Air intake on bow mast at ~8 meters. The system makes 3 standard gas measurements,<br />
5 ambient air, and 55 equilibrator headspace measurements every 2.6 hours. Standard<br />
gases are from NOAA/ESRL in Boulder and are directly traceable to the WMO scale.<br />
Concentrations are 289.06, 370.90, and 411.42 ppm. The system records the Licor<br />
millivolt and um/mol, H2O millivolt and mm/mol, cell temperature and pressure,<br />
equilibrator temperature, and gas and water flows. In addition, a deck box containing<br />
a GPS and Druck barometer is connected to the system which also records these values.</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 5.4.3 pgs 21-23</a> <br />
<br />
<b>BCO-DMO Processing Notes</b><br />
- Generated from original file RB0802GO.csv<br />
<br />
<b>BCO-DMO Edits</b><br />
- parameter names modified to conform to BCO-DMO convention<br />
- date reformatted to YYYYMMDD<br />
- time reformatted to HHMMSS<br />
- decimal places padded as appropriate<br />
- '-9' (No data flag in original) changed to 'nd'<br />
- blank cells filled with 'nd' (no data)</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
Licor 6262 analyser
Licor 6262 analyser
PI Supplied Instrument Name: Licor 6262 analyser Instrument Name: LI-COR LI-6262 Gas Analyzer Instrument Short Name:LI-COR LI-6262 Instrument Description: The LI-6262 CO2/H2O Gas Analyzer measures CO2 flux in the environment. It was manufactured by LI-COR Biosciences Inc. (licor.com) from 1990 through 2005 and serial Numbers for this model have the prefix of IRG3-XXXX. The LI-6262 is a differential, non-dispersive, infrared (NDIR) gas analyzer. The CO2 and H2O measurements are based on the difference in absorption of infrared (IR) radiation passing through two gas sampling cells. The reference cell is used for a gas of known CO2 or H2O concentration, and the
sample cell is used for a gas of unknown concentration. Infrared radiation is transmitted through both cell paths, and the output of the analyzer is proportional to the difference in absorption between the two (LI-6262 CO2/H2O Analyzer Operating and Service Manual, Publication Number 9003-59, March, 1996, pg 18). Community Standard Description: http://vocab.nerc.ac.uk/collection/L05/current/382/
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