http://lod.bco-dmo.org/id/dataset/2866
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)
Water column Particulate Organic Carbon (POC) and Particulate Organic Nitrogen (PON) results from Sediment Traps from R/V Tangaroa cruise 61TG_3052 in the Southern Ocean in 1999 (SOIREE project)
2009-08-24
publication
2009-08-24
revision
BCO-DMO Linked Data URI
2009-08-24
creation
http://lod.bco-dmo.org/id/dataset/2866
Scott Nodder
New Zealand National Institute of Water and Atmospheric Research
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: Nodder, S. (2009) Water column Particulate Organic Carbon (POC) and Particulate Organic Nitrogen (PON) results from Sediment Traps from R/V Tangaroa cruise 61TG_3052 in the Southern Ocean in 1999 (SOIREE project). Biological and Chemical Oceanography Data Management Office (BCO-DMO). (Version 24August2009) Version Date 2009-08-24 [if applicable, indicate subset used]. http://lod.bco-dmo.org/id/dataset/2866 [access date]
Sediment Traps - Water column POC and PON results Dataset Description: <p>SOIREE Sediment Traps - Water column POC and PON results <strong>METHOD</strong><br />
Two litre samples filtered through preweighed, precombusted (450°C for 4 hours) GF/F filters;<br />
assumed negligible carbonate so samples non-acidified; whole filters analysed on CHN analyser<br />
<br />
Corrected values were calculated based on a filtered volume of 2 litres, rather than 500 ml<br />
as reported for the initial values<br />
<br />
<strong>NOTES</strong><br />
1. The initial and OUTSIDE PATCH water column integrated POC values from SOIREE are higher<br />
than expected for Southern Ocean HNLC waters. For example, unpublished data provided by<br />
Wilford Gardner (USA) from the US JGOFS AESOPS transect, show that between 52-72°S 170°W<br />
integrated POC standing stocks (0-50 m) in summer ranged from 3002-14413 mgC/m2 in Dec 1997<br />
and 3603-10209 mgC/m2 in Jan 1998 SOIREE POC (MLD integrated) range from 4500-6200 mgC/m2<br />
outside the iron-fertilised patch which were not substantially different from that measured<br />
inside the patch during the SOIREE bloom (5100-8500 mgC/m2)<br />
<br />
2. There is no obvious indication from either sampling or analytical techniques that the POC<br />
values are artificially inflated due to sample handling, etc.<br />
<br />
3. Charette &amp; Buesseler (2000, G3) suggest that a previous export event must have occurred prior<br />
to SOIREE due to a substantial 234Th deficit relative to 238U, which might explain the SOIREE POC<br />
results. Since there is no indication from daily SeaWiFS images of a surface bloom from Nov 1998-Jan 1999<br />
(C. Law pers. comm., 1999), nor any "memory" of such an event in the pCO2 data (Watson et al., 2000, Nature),<br />
Charette &amp; Buesseler (2000) suggested that such a bloom is likely to have been a subsurface feature,<br />
or that there was a significant delay in export<br />
<br />
4. "Live" biological carbon in HNLC waters outside the patch represented a significant or similar<br />
amount of the organic carbon that was measured in the water column, ranging from 78-100% of the<br />
MLD-integrated POC (see Table A below). If we assume that the water column samples would have sampled<br />
only the phytoplankton and the microzooplankton (and not heterotrophic bacteria and mesozooplankton)<br />
then this proportion decreases to 40-60% but is still relatively substantial.<br />
<br />
5. POC values inside and outside the SOIREE patch were similar despite 6-fold and 3-fold increases in<br />
chlorophyll a concentrations and phytoplankton abundance, respectively, inside the iron-fertilised patch<br />
(Boyd et al., 2000, Nature)<br />
<br />
6. Therefore, we conclude that perhaps there was a significant POC component in the water column at<br />
the time that the SOIREE site was occupied, representing relict organic material derived from a previous<br />
bloom/export event.<br />
<br />
7. Given the uncertainties, however, it is wise to treat the interpretation of the above POC data with caution.<br />
&nbsp;</p>
<pre>
<strong>Table A</strong>mixed layer (0-65 m)
col integrated POC
OUT stations only mg C m-2mg C m-2%%
STATIONphytohbactmicrozoomesozoo total POC water columnDifference (ALL)Diff (phyto + micro only)
12-Feb-99T1141/1159550477216004471561579.642.2
16-Feb-99T1152/1202334662016004589588178.044.9
18-Feb-99T1157/1159529061616004101515779.542.9
21-Feb-99T1168/11885374706160045654564100.056.8
</pre>
<p>&nbsp;</p> Methods and Sampling: <p>See <a href="http://data.bco-dmo.org/Fe_Synthesis/SOIREE/SOIREE_cruisereport.pdf">SOIREE Preliminary Voyage Report</a><br />
<br />
<strong>METHOD</strong><br />
Two litre samples filtered through preweighed, precombusted (450°C for 4 hours) GF/F filters;<br />
assumed negligible carbonate so samples non-acidified; whole filters analysed on CHN analyser<br />
<br />
Corrected values were calculated based on a filtered volume of 2 litres, rather than 500 ml<br />
as reported for the initial values<br />
<br />
<strong>NOTES</strong><br />
1. The initial and OUTSIDE PATCH water column integrated POC values from SOIREE are higher<br />
than expected for Southern Ocean HNLC waters. For example, unpublished data provided by<br />
Wilford Gardner (USA) from the US JGOFS AESOPS transect, show that between 52-72°S 170°W<br />
integrated POC standing stocks (0-50 m) in summer ranged from 3002-14413 mgC/m2 in Dec 1997<br />
and 3603-10209 mgC/m2 in Jan 1998 SOIREE POC (MLD integrated) range from 4500-6200 mgC/m2<br />
outside the iron-fertilised patch which were not substantially different from that measured<br />
inside the patch during the SOIREE bloom (5100-8500 mgC/m2)<br />
<br />
2. There is no obvious indication from either sampling or analytical techniques that the POC<br />
values are artificially inflated due to sample handling, etc.<br />
<br />
3. Charette &amp; Buesseler (2000, G3) suggest that a previous export event must have occurred prior<br />
to SOIREE due to a substantial 234Th deficit relative to 238U, which might explain the SOIREE POC<br />
results. Since there is no indication from daily SeaWiFS images of a surface bloom from Nov 1998-Jan 1999<br />
(C. Law pers. comm., 1999), nor any "memory" of such an event in the pCO2 data (Watson et al., 2000, Nature),<br />
Charette &amp; Buesseler (2000) suggested that such a bloom is likely to have been a subsurface feature,<br />
or that there was a significant delay in export<br />
<br />
4. "Live" biological carbon in HNLC waters outside the patch represented a significant or similar<br />
amount of the organic carbon that was measured in the water column, ranging from 78-100% of the<br />
MLD-integrated POC (see Table A below). If we assume that the water column samples would have sampled<br />
only the phytoplankton and the microzooplankton (and not heterotrophic bacteria and mesozooplankton)<br />
then this proportion decreases to 40-60% but is still relatively substantial.<br />
<br />
5. POC values inside and outside the SOIREE patch were similar despite 6-fold and 3-fold increases in<br />
chlorophyll a concentrations and phytoplankton abundance, respectively, inside the iron-fertilised patch<br />
(Boyd et al., 2000, Nature)<br />
<br />
6. Therefore, we conclude that perhaps there was a significant POC component in the water column at<br />
the time that the SOIREE site was occupied, representing relict organic material derived from a previous<br />
bloom/export event.<br />
<br />
7. Given the uncertainties, however, it is wise to treat the interpretation of the above POC data with caution.<br />
&nbsp;</p>
<pre>
<strong>Table A</strong>mixed layer (0-65 m)
col integrated POC
OUT stations only mg C m-2mg C m-2%%
STATIONphytohbactmicrozoomesozoo total POC water columnDifference (ALL)Diff (phyto + micro only)
12-Feb-99T1141/1159550477216004471561579.642.2
16-Feb-99T1152/1202334662016004589588178.044.9
18-Feb-99T1157/1159529061616004101515779.542.9
21-Feb-99T1168/11885374706160045654564100.056.8
</pre>
completed
Scott Nodder
New Zealand National Institute of Water and Atmospheric Research
64-4-386-0357
301 Evans Bay Parade Hataitai
Wellington
6021
New Zealand
Scott.Nodder@niwa.co.nz
pointOfContact
asNeeded
Dataset Version: 24August2009
Unknown
lon
lat
date_UTC
time_UTC
depth
SOIREE_Day
Patch_Location
station
Client_ID
Date_Collected
POC_mg_per_m3
PN_mg_per_m3
Corrected_POC
Corrected_PN
POC_mmol_per_m3
PN_mmol_per_m3
Int_POC
C_to_N
MLD_0_to_65_m_Int_POC
MLD_0_to_20_m_Int_POC
MLD
Int_MLD_POC_mmol_per_m2
Int_MLD_POC_mg_per_m2
Average_Int_0_to_65_m_POC_IN
Average_Int_0_to_65_m_POC_OUT
Average_Int_0_to_20_m_POC_IN
Average_Int_0_to_20_m_POC_OUT
Average_Int_MLD_POC_IN
Average_Int_MLD_POC_OUT
CTD Seabird 911
Sediment Trap
theme
None, User defined
longitude
latitude
date
time of day
depth
No BCO-DMO term
station
featureType
BCO-DMO Standard Parameters
CTD Sea-Bird 911
Sediment Trap
instrument
BCO-DMO Standard Instruments
61TG_3052
service
Deployment Activity
Southern Ocean
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.
Iron Synthesis
https://osprey.bco-dmo.org/program/2017
Iron Synthesis
The two main objectives of the Iron Synthesis program (SCOR Working Group proposal, 2005), are:
1. Data compilation: assembling a common open-access database of the in situ iron experiments, beginning with the first period (1993-2002; Ironex-1, Ironex-2, SOIREE, EisenEx, SEEDS-1; SOFeX, SERIES) where primary articles have already been published, to be followed by the 2004 experiments where primary articles are now in progress (EIFEX, SEEDS-2; SAGE, FeeP); similarly for the natural fertilizations S.O.JGOFS (1992), CROZEX (2004/2005) and KEOPS (2005).
2. Modeling and data synthesis of specific aspects of two or more such experiments for various topics such as physical mixing, phytoplankton productivity, overall ecosystem functioning, iron chemistry, CO2 budgeting, nutrient uptake ratios, DMS(P) processes, and combinations of these variables and processes.
SCOR Working Group proposal, 2005. "The Legacy of in situ Iron Enrichments: Data Compilation and Modeling".
http://www.scor-int.org/Working_Groups/wg131.htm
See also: SCOR Proceedings Vol. 42 Concepcion, Chile October 2006, pgs: 13-16 2.3.3 Working Group on The Legacy of in situ Iron Enrichments: Data Compilation and Modeling.
The first objective of the Iron Synthesis program involves a data recovery effort aimed at assembling a common, open-access database of data and metadata from a series of in-situ ocean iron fertilization experiments conducted between 1993 and 2005. Initially, funding for this effort is being provided by the Scientific Committee on Oceanic Research (SCOR) and the U.S. National Science Foundation (NSF).
Through the combined efforts of the principal investigators of the individual projects and the staff of Biological and Chemical Oceanography Data Management Office (BCO-DMO), data currently available primarily through individuals, disparate reports and data agencies, and in multiple formats, are being collected and prepared for addition to the BCO-DMO database from which they will be freely available to the community.
As data are contributed to the BCO-DMO office, they are organized into four overlapping categories:
1. Level 1, basic metadata
(e.g., description of project/study, general location, PI(s), participants);
2. Level 2, detailed metadata and basic shipboard data and routine ship's operations
(e.g., CTDs, underway measurements, sampling event logs);
3. Level 3, detailed metadata and data from specialized observations
(e.g., discrete observations, experimental results, rate measurements) and
4. Level 4, remaining datasets
(e.g., highest level of detailed data available from each study).
Collaboration with BCO-DMO staff began in March of 2008 and initial efforts have been directed toward basic project descriptions, levels 1 and 2 metadata and basic data, with detailed and more detailed data files being incorporated as they become available and are processed.
Related file
Program Documentation
The Iron Synthesis Program is funded jointly by the Scientific Committee on Oceanic Research (SCOR) and the U.S. National Science Foundation (NSF).
FeSynth
largerWorkCitation
program
Southern Ocean Iron Release Experiment
https://osprey.bco-dmo.org/project/2051
Southern Ocean Iron Release Experiment
<p>Project in the Southern Ocean aimed at maintaining a coherent patch of iron-enriched seawater for the duration of project and to interpret any iron-mediated effects on the patch by conducting measurements and performing experiments during this period of the project.</p>
<p>The Southern Ocean Iron RElease Experiment (SOIREE), was the first in situ iron fertilization experiment performed in the polar waters of the Southern Ocean. SOIREE was an interdisciplinary study involving participants from six countries, and took place in February 1999 south of the Polar Front in the Australasian-Pacific sector of the Southern Ocean.</p>
<p>Approximately 3800 kg of acidified FeSO4.7H2O and 165 g of the tracer sulphur hexafluoride (SF6) were added to a 65-m deep surface mixed layer over an area of ~50 km2. Initially, mean dissolved iron concentrations were ~2.7 nM, but decreased to ambient levels within days, requiring subsequent additions of 1550-1750 kg of acidified FeSO4.7H2O on days 3, 5 and 7 of the experiment.</p>
<p>During the 13-day site occupation, there were iron-mediated increases in phytoplankton growth rates, with marked increases in chlorophyll a (up to 2 µgl-1) and production rates (up to 1.3 gCm-2d-1). These resulted in subsequent changes in the pelagic ecosystem structure, and in the cycling of carbon, silica and sulphur, such as a 10% drawdown of surface CO2.</p>
<p>The SOIREE bloom persisted for >40 days following our departure from the site, as observed via <a href="http://data.bco-dmo.org/jg/serv/BCO/Fe_Synthesis/SOIREE/61TG_3052/SEAWIFS.html0" target="_blank"">SeaWiFS remotely sensed observations of Ocean Colour.</a></p>
<p><strong>BCO-DMO Note:</strong><br />
All original data and metadata provided on a CD-Rom accompanying the Deep-Sea Research II 48 (2001) volume. The CD-Rom contains the main SOIREE datasets and ancillary information including the pre-experiment 'desktop' database study for site-selection, and satellite images of the SOIREE bloom.<br />
© 2001 Elsevier Science Ltd. All rights reserved.</p>
<h3>Related files</h3>
<p><a href="http://data.bco-dmo.org/Fe_Synthesis/SOIREE/SOIREE_cruisereport.pdf">SOIREE Preliminary Voyage Report</a><br />
<a href="http://data.bco-dmo.org/Fe_Synthesis/SOIREE/Boyd_Law_2001_Intro.pdf">SOIREE Introduction and Summary, Deep-Sea Research II 48 (2001) 2425-2438</a><br />
<a href="http://data.bco-dmo.org/Fe_Synthesis/SOIREE/FeSyn_SOIREE_CruiseTrack_GoogleEarth.png" target="_blank"">SOIREE Cruise Track</a></p>
SOIREE
largerWorkCitation
project
eng; USA
oceans
Southern Ocean
2009-08-24
Southern Ocean
0
BCO-DMO catalogue of parameters from Water column Particulate Organic Carbon (POC) and Particulate Organic Nitrogen (PON) results from Sediment Traps from R/V Tangaroa cruise 61TG_3052 in the Southern Ocean in 1999 (SOIREE 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/18737.rdf
Name: lon
Units: decimal degrees
Description: <p>longitude, negative denotes West</p>
http://lod.bco-dmo.org/id/dataset-parameter/18738.rdf
Name: lat
Units: decimal degrees
Description: <p>latitude, negative denotes South</p>
http://lod.bco-dmo.org/id/dataset-parameter/18739.rdf
Name: date_UTC
Units: YYYYMMDD
Description: <p>UTC Date</p>
http://lod.bco-dmo.org/id/dataset-parameter/18740.rdf
Name: time_UTC
Units: HHMM
Description: <p>UTC time</p>
http://lod.bco-dmo.org/id/dataset-parameter/18741.rdf
Name: depth
Units: meters
Description: <p>Sample depth</p>
http://lod.bco-dmo.org/id/dataset-parameter/18742.rdf
Name: SOIREE_Day
Units: Text
Description: <p>SOIREE Experiment Day<br />
T1 = 0000 h NZST 10/02/99 + 24 hours</p>
http://lod.bco-dmo.org/id/dataset-parameter/18743.rdf
Name: Patch_Location
Units: Text
Description: <p>Patch Location (In/Out)</p>
http://lod.bco-dmo.org/id/dataset-parameter/18744.rdf
Name: station
Units: Text
Description: <p>CTD Station Id</p>
http://lod.bco-dmo.org/id/dataset-parameter/18745.rdf
Name: Client_ID
Units: text
Description: <p>Client ID</p>
http://lod.bco-dmo.org/id/dataset-parameter/18746.rdf
Name: Date_Collected
Units: text
Description: <p>Date Collected</p>
http://lod.bco-dmo.org/id/dataset-parameter/18747.rdf
Name: POC_mg_per_m3
Units: mg/m3
Description: <p>POC in mg per m3</p>
http://lod.bco-dmo.org/id/dataset-parameter/18748.rdf
Name: PN_mg_per_m3
Units: mg/m3
Description: <p>PN in mg per m3</p>
http://lod.bco-dmo.org/id/dataset-parameter/18749.rdf
Name: Corrected_POC
Units: mg/m3
Description: <p>Corrected POC<br /><br />
Corrected values were calculated based on a filtered volume of 2 litres, rather than 500 ml as reported for the initial values</p>
http://lod.bco-dmo.org/id/dataset-parameter/18750.rdf
Name: Corrected_PN
Units: mg/m3
Description: <p>Corrected PN<br /><br />
Corrected values were calculated based on a filtered volume of 2 litres, rather than 500 ml as reported for the initial values</p>
http://lod.bco-dmo.org/id/dataset-parameter/18751.rdf
Name: POC_mmol_per_m3
Units: mmol/m3
Description: <p>POC in mmol per m3</p>
http://lod.bco-dmo.org/id/dataset-parameter/18752.rdf
Name: PN_mmol_per_m3
Units: mmol/m3
Description: <p>PN in mmol per m3</p>
http://lod.bco-dmo.org/id/dataset-parameter/18753.rdf
Name: Int_POC
Units: mmol/m2
Description: <p>Int POC</p>
http://lod.bco-dmo.org/id/dataset-parameter/18754.rdf
Name: C_to_N
Units: molar
Description: <p>Ratio of C to N</p>
http://lod.bco-dmo.org/id/dataset-parameter/18755.rdf
Name: MLD_0_to_65_m_Int_POC
Units: mmol/m2
Description: <p>MLD 0-65 m Int POC</p>
http://lod.bco-dmo.org/id/dataset-parameter/18756.rdf
Name: MLD_0_to_20_m_Int_POC
Units: mmol/m2
Description: <p>MLD 0-20 m Int POC</p>
http://lod.bco-dmo.org/id/dataset-parameter/18757.rdf
Name: MLD
Units: meters
Description: <p>MLD<br /><br />
Based on calculations of MLD by E. Abraham where MLD is defined as the maximum depth at which the density is less than that at 5 m + 1 kg/m3. Values here are average MLDs determined fom up and downcasts (n=2) unless otherwise stated</p>
http://lod.bco-dmo.org/id/dataset-parameter/18758.rdf
Name: Int_MLD_POC_mmol_per_m2
Units: mmol/m2
Description: <p>Int MLD POC in mmol per m2<br /><br />
Based on calculations of MLD by E. Abraham where MLD is defined as the maximum depth at which the density is less than that at 5 m + 1 kg/m3. Values here are average MLDs determined fom up and downcasts (n=2) unless otherwise stated</p>
http://lod.bco-dmo.org/id/dataset-parameter/18759.rdf
Name: Int_MLD_POC_mg_per_m2
Units: mg/m2
Description: <p>Int MLD POC in mg per m2<br /><br />
Based on calculations of MLD by E. Abraham where MLD is defined as the maximum depth at which the density is less than that at 5 m + 1 kg/m3. Values here are average MLDs determined fom up and downcasts (n=2) unless otherwise stated</p>
http://lod.bco-dmo.org/id/dataset-parameter/18760.rdf
Name: Average_Int_0_to_65_m_POC_IN
Units: mmol/m2
Description: <p>Average Int 0-65 m POC IN</p>
http://lod.bco-dmo.org/id/dataset-parameter/18761.rdf
Name: Average_Int_0_to_65_m_POC_OUT
Units: mmol/m2
Description: <p>Average Int 0-65 m POC OUT</p>
http://lod.bco-dmo.org/id/dataset-parameter/18762.rdf
Name: Average_Int_0_to_20_m_POC_IN
Units: mmol/m2
Description: <p>Average Int 0-20 m POC IN</p>
http://lod.bco-dmo.org/id/dataset-parameter/18763.rdf
Name: Average_Int_0_to_20_m_POC_OUT
Units: mmol/m2
Description: <p>Average Int 0-20 m POC OUT</p>
http://lod.bco-dmo.org/id/dataset-parameter/18764.rdf
Name: Average_Int_MLD_POC_IN
Units: mmol/m2
Description: <p>Average Int MLD POC IN</p>
http://lod.bco-dmo.org/id/dataset-parameter/18765.rdf
Name: Average_Int_MLD_POC_OUT
Units: mmol/m2
Description: <p>Average Int MLD POC OUT</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
18452
https://datadocs.bco-dmo.org/file/l880y4KFqqXz1/traps_POCPONwcol.csv
traps_POCPONwcol.csv
Primary data file for dataset ID 2866
download
https://osprey.bco-dmo.org/dataset/2866/data/download
download
onLine
dataset
<p>See <a href="http://data.bco-dmo.org/Fe_Synthesis/SOIREE/SOIREE_cruisereport.pdf">SOIREE Preliminary Voyage Report</a><br />
<br />
<strong>METHOD</strong><br />
Two litre samples filtered through preweighed, precombusted (450°C for 4 hours) GF/F filters;<br />
assumed negligible carbonate so samples non-acidified; whole filters analysed on CHN analyser<br />
<br />
Corrected values were calculated based on a filtered volume of 2 litres, rather than 500 ml<br />
as reported for the initial values<br />
<br />
<strong>NOTES</strong><br />
1. The initial and OUTSIDE PATCH water column integrated POC values from SOIREE are higher<br />
than expected for Southern Ocean HNLC waters. For example, unpublished data provided by<br />
Wilford Gardner (USA) from the US JGOFS AESOPS transect, show that between 52-72°S 170°W<br />
integrated POC standing stocks (0-50 m) in summer ranged from 3002-14413 mgC/m2 in Dec 1997<br />
and 3603-10209 mgC/m2 in Jan 1998 SOIREE POC (MLD integrated) range from 4500-6200 mgC/m2<br />
outside the iron-fertilised patch which were not substantially different from that measured<br />
inside the patch during the SOIREE bloom (5100-8500 mgC/m2)<br />
<br />
2. There is no obvious indication from either sampling or analytical techniques that the POC<br />
values are artificially inflated due to sample handling, etc.<br />
<br />
3. Charette &amp; Buesseler (2000, G3) suggest that a previous export event must have occurred prior<br />
to SOIREE due to a substantial 234Th deficit relative to 238U, which might explain the SOIREE POC<br />
results. Since there is no indication from daily SeaWiFS images of a surface bloom from Nov 1998-Jan 1999<br />
(C. Law pers. comm., 1999), nor any "memory" of such an event in the pCO2 data (Watson et al., 2000, Nature),<br />
Charette &amp; Buesseler (2000) suggested that such a bloom is likely to have been a subsurface feature,<br />
or that there was a significant delay in export<br />
<br />
4. "Live" biological carbon in HNLC waters outside the patch represented a significant or similar<br />
amount of the organic carbon that was measured in the water column, ranging from 78-100% of the<br />
MLD-integrated POC (see Table A below). If we assume that the water column samples would have sampled<br />
only the phytoplankton and the microzooplankton (and not heterotrophic bacteria and mesozooplankton)<br />
then this proportion decreases to 40-60% but is still relatively substantial.<br />
<br />
5. POC values inside and outside the SOIREE patch were similar despite 6-fold and 3-fold increases in<br />
chlorophyll a concentrations and phytoplankton abundance, respectively, inside the iron-fertilised patch<br />
(Boyd et al., 2000, Nature)<br />
<br />
6. Therefore, we conclude that perhaps there was a significant POC component in the water column at<br />
the time that the SOIREE site was occupied, representing relict organic material derived from a previous<br />
bloom/export event.<br />
<br />
7. Given the uncertainties, however, it is wise to treat the interpretation of the above POC data with caution.<br />
&nbsp;</p>
<pre>
<strong>Table A</strong>mixed layer (0-65 m)
col integrated POC
OUT stations only mg C m-2mg C m-2%%
STATIONphytohbactmicrozoomesozoo total POC water columnDifference (ALL)Diff (phyto + micro only)
12-Feb-99T1141/1159550477216004471561579.642.2
16-Feb-99T1152/1202334662016004589588178.044.9
18-Feb-99T1157/1159529061616004101515779.542.9
21-Feb-99T1168/11885374706160045654564100.056.8
</pre>
Specified by the Principal Investigator(s)
<p>See <a href="http://data.bco-dmo.org/Fe_Synthesis/SOIREE/SOIREE_cruisereport.pdf">SOIREE Preliminary Voyage Report</a><br />
See NOTES in Dataset description and Methods &amp; Sampling description<br />
&nbsp;</p>
Specified by the Principal Investigator(s)
Generated from original file SOIREE_Export_final.xls, Tab: PONPNwatercolumn
provided on the Deep-Sea Research II 48 (2001) accompanying CD-Rom
BCO-DMO Edits
- parameter names modified to conform to BCO-DMO convention
- date_UTC, time_UTC, lat, lon added from files:
SOIREE_Stations_MasterStationList.xls
SOIREE_CTD_Summary
- Blank rows in original sheet removed
- 'nd' added to blank cells
- Added Sum_[Client_Id] to Client_Id field in summation rows
- Moved Averages to three sets of rows/columns at end
Specified by BCO-DMO Data Managers
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 911
CTD Seabird 911
PI Supplied Instrument Name: CTD Seabird 911 PI Supplied Instrument Description:NIWA's Seabird 911plus CTD and related instrumentation Instrument Name: CTD Sea-Bird 911 Instrument Short Name:CTD SBE 911 Instrument Description: The Sea-Bird SBE 911 is a type of CTD instrument package. The SBE 911 includes the SBE 9 Underwater Unit and the SBE 11 Deck Unit (for real-time readout using conductive wire) for deployment from a vessel. The combination of the SBE 9 and SBE 11 is called a SBE 911. The SBE 9 uses Sea-Bird's standard modular temperature and conductivity sensors (SBE 3 and SBE 4). The SBE 9 CTD can be configured with 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/TOOL0035/
Sediment Trap
Sediment Trap
PI Supplied Instrument Name: Sediment Trap PI Supplied Instrument Description:MULTI-trap dimensions:
Length (L, m): 0.58 Trap length with baffles inserted;
L without baffles: 0.525 m
AR without baffles: 7.50
Trap volume without baffles: 2.021 litres
Inside diameter (Di, m): 0.07
Outside diameter (Do, m): 0.08
Aspect ratio (AR): 8.29
Aspect ratio with salt (AR): 7.29 Basal brine added to a height of 1-trap diameter (7 cm)
Collection area (A, m2): 0.00385
Trap volume (V, m3): 0.00223
Trap volume (V, litres): 2.232
Baffle length (Lb, m): 0.08
Baffle diameter (Dib, m): 0.01
Baffle aspect ratio (ARb): 5.77 Instrument Name: Sediment Trap Instrument Short Name:Sediment Trap Instrument Description: Sediment traps are specially designed containers deployed in the water column for periods of time to collect particles from the water column falling toward the sea floor. In general a sediment trap has a jar at the bottom to collect the sample and a broad funnel-shaped opening at the top with baffles to keep out very large objects and help prevent the funnel from clogging. This designation is used when the specific type of sediment trap was not specified by the contributing investigator. Community Standard Description: http://vocab.nerc.ac.uk/collection/L05/current/33/
Cruise: 61TG_3052
61TG_3052
Community Standard Description
International Council for the Exploration of the Sea
R/V Tangaroa
vessel
61TG_3052
Philip W. Boyd
University of Otago
http://bcodata.whoi.edu/Fe_Synthesis/SOIREE/SOIREE_cruisereport.pdf
Report describing 61TG_3052
Community Standard Description
International Council for the Exploration of the Sea
R/V Tangaroa
vessel