Dataset: SFX Patch Determination

Name: SOFeX Revelle SF6 Patch Determination Table from R/V Roger Revelle cruise DRFT08RR from the Southern Ocean, south of New Zealand in 2002 (SOFeX project)
Published: 2008-08-22
Keywords: oceans

Cite This Dataset

Project:

Southern Ocean Iron Experiment (SOFeX)

Program:

Ocean Carbon and Biogeochemistry (OCB)

Iron Synthesis (FeSynth)

Principal Investigator:

Kevin Sullivan (National Oceanic and Atmospheric Administration, NOAA-AOML)

BCO-DMO Data Manager:

Cynthia L. Chandler (Woods Hole Oceanographic Institution, WHOI BCO-DMO)

Version:

22 August 2008

Version Date:

2008-08-22

Restricted:

Validated:

Yes

Current State:

Final no updates expected

Data URL:

https://www.bco-dmo.org/dataset/2938/data

SOFeX Revelle SF6 Patch Determination Table from R/V Roger Revelle cruise DRFT08RR from the Southern Ocean, south of New Zealand in 2002 (SOFeX project)

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Description

This SF6 Patch Determination Table was a preliminary attempt at a quantitative answer to the question of whether a cast on the Revelle was in or out of the patch.

Methods & Sampling

22 August 2008: Contributed by Kevin Sullivan (NOAA-AOML)
Prepared for OCB data system by Cyndy Chandler, OCB DMO (WHOI).

Original MS Word file downloaded from MBARI: get MS Word file
or converted to PDF format file

Description
This table was a preliminary attempt at a quantitative answer to the question of whether a cast on the Revelle was in or out of the patch. The ten largest underway analyses were averaged for each half day. A regression fit between the year-day (x) and the average half-day maximum (y) yielded an exponential equation. This equation was used to provide a maximum SF6 concentration within the patch when each cast was done. The percentage of that maximum SF6 concentration was calculated for three values associated with each cast: the SF6 in the surface bottle, the largest SF6 measured in any niskin, and the SF6 measured with the underway system (average of ten analyses) during the cast. The largest differences among these three values are seen within the first days of dispersal of the patch. The occurrence of percentages significantly larger than 100% also illustrates the spatial variability of the tracer gas and the difficulties in estimating the half-day maxima.

Contact: Kevin Sullivan (NOAA-AOML)