CTD, TM Rosette nutrients and chlorophyll data from the R/V Melville IronEx II cruise in the Equatorial Pacific Ocean in 1995 (IronEx II project)

Website: https://www.bco-dmo.org/dataset/3153
Version: 22July2009
Version Date: 2009-07-22

Project
» Iron Experiment II (IronExII)

Program
» Iron Synthesis (FeSynth)
ContributorsAffiliationRole
Johnson, KenMoss Landing Marine Laboratories (MLML)Principal Investigator
Coale, Kenneth H.Moss Landing Marine Laboratories (MLML)Co-Principal Investigator
Mackie, DougNew Zealand National Institute of Water and Atmospheric Research (NIWA)Contact
Gegg, Stephen R.Woods Hole Oceanographic Institution (WHOI BCO-DMO)BCO-DMO Data Manager


Dataset Description

IronExII CTD, TM Rosette CTD, nutrients and chlorophyll data


Data Processing Description

BCO-DMO Note:
No metadata supplied with these data
Some parameters and units require additional work

BCO-DMO Processing Notes
Prepared by WHOI OCB-DMO from original file: FeX2 edited CTD,TM ROS,nuts and C.XLS
Original file was downloaded on 16June2008 from http://www.mbari.org/sofex/IronEx_II.htm

Changes made to original file:
- Extensive editing to remove blank lines, organize data (stations, etc) into rows/columns
- Multiple occurrences of parameter header lines throughout file removed
- Single parameter header line at top retained after reformatting
- Misc comments replicated in cast log removed from file

- Parameter names edited to conform to BCO-DMO convention
- Discrepancy in units for parameters Total_PP and Total_HP
- Units reported as µgC/l in some cases, µM C in others
- This discrepancy still needs to be resolved (BCO-DMO, 22July2009)

- Duplicate parameter names Phaeo changed to Phaeo_a and Phaeo_b

- Station changed to Station_Id as parameter name
- Station_ids using multiple rows combined into one station id
- Spaces replaced with underscores in station_ids
- "#305" is sample number for Transect_thru_hull_#305 in these stations

- date, time, event, cast, lat, lon manually inserted from Cast Log using event in Cast Log
- Original lat/lons, dates, times checked against same data in Cast Log before using
- Found SLIGHT differences between original and cast log
- Used cast log values throughout (appeared to be more reliable/consistent)
- Original event replaced with event from Cast_Log for consistency

- "nd" inserted as no data value in blank cells

Issues/Notes:
TM-Rosette-test: "note NO3 rinse" comment removed

Cochlan (in original event column) - What does Cochlan mean/signify??

Event: 19951473510 - obvious incorrect time but no correction found
Station_Id: TM-Rosette_259 Original Time is 1440, Cast Log time is 1727 (Used Cast Log)
Station_Id: TM-Rosette_314 Original Time is 1402, Cast Log time is 0000
(Used Cast Log - 1402 is closer to on deck time)


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Data Files

File
CTD_TM_Nuts_Chl.csv
(Comma Separated Values (.csv), 171.96 KB)
MD5:23c58ea4246a9c1f57bd8a20b4913d04
Primary data file for dataset ID 3153

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Parameters

ParameterDescriptionUnits
date

Date UTC

YYYYMMDD
time

Time UTC

HHMM
lat

latitude, negative denotes South

decimal degrees
lon

longitude, negative denotes West

decimal degrees
event

Unique event number (Generated by BCO-DMO)

YYYYDAYHHMM
yrday

Day of year

integer
cast

Cast id

integer
depth

Depth in meters

meters
POC

POC

ug
Oxygen

Oxygen

uM
Chla

Chl-a

mg/m3
NH4

NH4

uM
PO4

PO4

uM
SiO4

SiO4

uM
NO3

NO3

uM
Station_Id

Cruise station id

text
Phaeo_a

Phaeo_a

mg/m3
Phaeo_b

Phaeo_b

microM(??)
SF6

SF6

mol dm-3
Potemp

Potemp

(tbd)
Sal

Sal

(tbd)
Fluor

Flour

(tbd)
Trans

Trans

(tbd)
Sigmat

Sigmat

(tbd)
Total_PP

Total_PP

microM
Total_HP

Total_HP

microM
Synoc

Synoc

(tbd)
RFP

RFP

(tbd)
Prymn

Prymn

(tbd)
Dino

Dino

(tbd)
Diatom

Diatom

(tbd)
H_Flagell

H_Flagell

(tbd)
H_Dino

H_Dino

(tbd)
H_Ciliate

H_Ciliate

(tbd)
A_Ciliate

A_Ciliate

(tbd)


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Instruments

Dataset-specific Instrument Name
Conductivity, Temperature, Depth
Generic Instrument Name
CTD - profiler
Generic Instrument Description
The Conductivity, Temperature, Depth (CTD) unit is an integrated instrument package designed to measure the conductivity, temperature, and pressure (depth) of the water column. The instrument is lowered via cable through the water column. It permits scientists to observe the physical properties in real-time via a conducting cable, which is typically connected to a CTD to a deck unit and computer on a ship. The CTD is often configured with additional optional sensors including fluorometers, transmissometers and/or radiometers. It is often combined with a Rosette of water sampling bottles (e.g. Niskin, GO-FLO) for collecting discrete water samples during the cast. This term applies to profiling CTDs. For fixed CTDs, see https://www.bco-dmo.org/instrument/869934.

Dataset-specific Instrument Name
Trace Metal Bottle
Generic Instrument Name
Trace Metal Bottle
Generic Instrument Description
Trace metal (TM) clean rosette bottle used for collecting trace metal clean seawater samples.


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Deployments

IronExII_MV

Website
Platform
R/V Melville
Start Date
1995-05-13
End Date
1995-06-21
Description
Cruise Summary: 5/14/95 Depart Papeete, Tahiti 5/14/95 to 5/23/95 Transit & Test stations 5/23/95 to 5/29/95 Survey for Fe release 5/29/95 to 5/30/95 Fe release #1 5/30/95 to 6/1/95 In & out sampling 6/1/95 to 6/1/95 Fe release #2 6/1/95 to 6/5/95 In & out sampling 6/5/95 to 6/5/95 Fe release #3 6/6/95 to 6/8/95 In & out sampling 6/8/95 to 6/9/95 Control patch (SF6 only), 2nd Fe patch release (0.4 nM Fe) 6/9/95 to 6/15/95 In & out sampling of all 3 patches 6/15/95 to 6/21/95 Transit to Acapulco, Mexico


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Project Information

Iron Experiment II (IronExII)

Coverage: Equatorial Pacific Ocean


One of two (see IronEx I Oct/Nov 1993) small scale iron fertilization experiments conducted
in the Equatorial Pacific Ocean.

Summary:

5/14/95 Depart Papeete, Tahiti

5/14/95 to 5/23/95 Transit & Test stations

5/23/95 to 5/29/95 Survey for Fe release

5/29/95 to 5/30/95 Fe release #1

5/30/95 to 6/1/95 In & out sampling

6/1/95 to 6/1/95 Fe release #2

6/1/95 to 6/5/95 In & out sampling

6/5/95 to 6/5/95 Fe release #3

6/6/95 to 6/8/95 In & out sampling

6/8/95 to 6/9/95 Control patch (SF6 only), 2nd Fe patch release (0.4 nM Fe)

6/9/95 to 6/15/95 In & out sampling of all 3 patches

6/15/95 to 6/21/95 Transit to Acapulco, Mexico



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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".
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).



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Funding

Funding SourceAward
NSF Division of Ocean Sciences (NSF OCE)
Office of Naval Research (ONR)

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