CTD log from R/V Columbus Iselin IronEx I cruise in the Equatorial Pacific Ocean in 1993 (IronEx I project)

Website: https://www.bco-dmo.org/dataset/3157
Version: 10June2009
Version Date: 2009-06-10

Project
» Iron Experiment I (IronExI)

Program
» Iron Synthesis (FeSynth)
ContributorsAffiliationRole
Johnson, KenMonterey Bay Aquarium Research Institute (MBARI)Principal Investigator
Mackie, DougUniversity of OtagoContact
Gegg, Stephen R.Woods Hole Oceanographic Institution (WHOI)BCO-DMO Data Manager


Dataset Description

IronExI - CTD Log
Includes Nutrients, Chl-a, CTD, SF6, O2, Thru hull underway nutrients


Data Processing Description

BCO-DMO Processing Notes
Generated from original file: FeX 1 CTD,Nuts,SF6.xls
Original file was downloaded on 16June2008 from http://www.mbari.org/sofex/IronEx_I.htm

Changes made to original file:
- Extensive editing to remove blank lines, organize data (stations, etc) into rows/columns
- date, time, event, lat, lon, depth manually inserted from Station list using event
- "nd" inserted as no data value in blank cells
- Parameter names edited to conform to BCO-DMO convention


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Data Files

File
CTD_Log.csv
(Comma Separated Values (.csv), 83.22 KB)
MD5:7bb0fcff0c291bfc7cb04bc7c3c330ad
Primary data file for dataset ID 3157

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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
depth

Depth in meters

meters
O2

Oxygen

uM
Chl_a

Chl-a

mg/m3
NH4

NH4

uM
PO4

PO4

uM
SiO4

SiO4

uM
NO3

NO3

uM
Station

Cruise station id

text
SF6

SF6

mol dm-3
Potemp

Potemp

(tbd)
Salinity

Sal

(tbd)
Sigma_t

Sigmat

(tbd)
Patch

Patch location (In/Out)

text
orig_event_number

Original event number

ddd_hhmm
orig_comment_data

Original comment re: data

text
orig_comment_station

Original comment re: station

Pressure

Pressure in decibars

decibars


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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.


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Deployments

CI_IronExI

Website
Platform
R/V Columbus Iselin
Start Date
1993-10-11
End Date
1993-11-07


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Project Information

Iron Experiment I (IronExI)

Coverage: Equatorial Pacific Ocean


One of two (see IronExII May/June 1995) small scale iron fertilization
experiments conducted in the Equatorial Pacific Ocean.



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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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