Bulk pumped particles from sediment traps from R/V Tangaroa cruise 61TG_3052 in the Southern Ocean in 1999 (SOIREE project)

Website: https://www.bco-dmo.org/dataset/2864
Version: 20August2009
Version Date: 2009-08-20

» Southern Ocean Iron Release Experiment (SOIREE)

» Iron Synthesis (FeSynth)
Trull, Tom W.University of Tasmania (UTAS)Principal Investigator
Mackie, DougUniversity of OtagoContact
Gegg, Stephen R.Woods Hole Oceanographic Institution (WHOI)BCO-DMO Data Manager

Dataset Description

SOIREE Sediment Traps - Bulk Pumped Particles

Methods & Sampling

See SOIREE Preliminary Voyage Report

Comments preserved from the original file:

Blank GFF: (QMA blank - see notes below) 5.									
1. QMA blank (see SizeFractionatedPumpedParticles sheet) used for GFF until GFF blank measurement is complete									
2. Two samples were numbered 14 by mistake at sea  - heavily loaded filter was obviously from 10m depth - designated b.									
3. Blank Correction from GFF blanks 			n=11	PeakArea	13Cpdb			
in Part# D1100 tin cups (same as samples)		average	9.41		-25.83			
							stdev	1.27		0.6			
4. NBS22 Oil standard correction from 			n=51	n=51	n=51		n=25	n=25	n=25
in two sizes during same time period			1ul	1ul	1ul		2ul	2ul	2ul
as SOIREE samples using same column			VS	13C	13C		VS	13C	13C
PeakArea in Volt-seconds (VS)				undil	undil	undil,bc	undil	undil	undil,bc
average of 1ul and 2ul results			average	49.61	-29.69	-29.84		91.52	-29.77	-29.86
is -29.85, 0.15 lighter than 			stdev	18.72	0.2	0.22		44.04	0.19	0.18
NBS/NIST assigned value of -29.7			Blank corrections for NBS stds from EA tin cup part # D4019 					
correction made by adding 0.15 to SOIREE values					n=7	PeakArea	13Cpdb	
										average	1.24		-24.62	
										stdev	0.51		2.96	
Blank, Standard, Sample raw isotope data in file EA99_2.xls, available from Trull on request									
Trull results on 142mm GFF filters from hose pump, as reported in Trull and Armand, DSR-II paper									
all CHN analyses done on 2 syringepunches of the folded filter									
fraction analysed = 4xpuncharea/filterarea: 0.00276									
all 13C analyses done on 1 syringepunch of the folded filter									
fraction analysed = 2xpuncharea/filterarea: 0.00138									

Data Processing Description

See SOIREE Preliminary Voyage Report

BCO-DMO Processing Notes

Generated from original file SOIREE_Export_final.xls, Tab: BulkPumpedParticles

provided on the Deep-Sea Research II 48 (2001) accompanying CD-Rom


- parameter names modified to conform to BCO-DMO convention

- date_UTC, time_UTC, lat, lon added from files SOIREE_Stations_CTDSampling and MasterStationList.xls

- 'nd' added to blank cells

- Made column header record one line

- Added 'T' to CTD cast for consistency with other spreadsheets

- Formatted Date (NZST) to YYYYMMDD

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Data Files

(Comma Separated Values (.csv), 3.20 KB)
Primary data file for dataset ID 2864

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lonlongitude, negative denotes West decimal degrees
latlatitude, negative denotes South decimal degrees
time_UTCUTC time HHMM
depthSample depth meters
Filter_NoFilter Number integer
PatchPatch Location (In/Out) Text
CTD_cast_sametimeCTD Station/Cast Id Text
Volume_filteredVolume filtered (tbd)
C_measuredC measured (tbd)
C_on_filterC on filter (tbd)
C_to_N_ratioC/N Ratio dimensionless
C_blank_corrC blank corr (tbd)
C_per_litreC per litre (tbd)
C13_org_measured13Corg measured (tbd)
C13_org_blnk_corr13Corg blnk corr (tbd)
C13_org_NBS22std13Corg NBS22std (tbd)

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Dataset-specific Instrument Name
CTD Seabird 911
Generic Instrument Name
CTD Sea-Bird 911
Dataset-specific Description
NIWA's Seabird 911plus CTD and related instrumentation
Generic 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.

Dataset-specific Instrument Name
Sediment Trap
Generic Instrument Name
Sediment Trap
Dataset-specific 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
Generic 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.

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R/V Tangaroa
Start Date
End Date
Cruise to the Southern Ocean as part of the Fe Sythesis project whose aim was to maintain a coherent patch of iron-enriched seawater for the duration of SOIREE and to interpret any iron-mediated effects on the patch by conducting measurements and performing experiments during this period.

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Project Information

Southern Ocean Iron Release Experiment (SOIREE)

Coverage: Southern Ocean

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.

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.

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.

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.

The SOIREE bloom persisted for >40 days following our departure from the site, as observed via SeaWiFS remotely sensed observations of Ocean Colour.

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.
© 2001 Elsevier Science Ltd. All rights reserved.

Related files

SOIREE Preliminary Voyage Report
SOIREE Introduction and Summary, Deep-Sea Research II 48 (2001) 2425-2438
SOIREE Cruise Track

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Program Information

Iron Synthesis (FeSynth)

Coverage: Global

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".

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).

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