Table of Contents

• Dataset Description
  • Data Processing Description
• Data Files
• Parameters
• Instruments
• Deployments
• Project Information
• Program Information
• Funding

IronExII CTD, TM Rosette CTD, nutrients and chlorophyll data

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)

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

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).