19:I[42426,["/_next/static/immutable/chunks/1xctgzqre-wsy.js","/_next/static/immutable/chunks/06_-wz6pdtp2b.js","/_next/static/immutable/chunks/30e52g49hg40p.js","/_next/static/immutable/chunks/02yq6tul2z-oh.js","/_next/static/immutable/chunks/10bx_ec2vj7n_.js","/_next/static/immutable/chunks/33bfn03fo8xnt.js","/_next/static/immutable/chunks/0tfjf78scu61b.js","/_next/static/immutable/chunks/31xnvej4n1bi9.js"],"default"] 1a:T7cd,

  
 Change history:
    070509: downloaded original zipped data (PAR.zip) and plots (Par.pdf) from SOFeX project data web site.
    070511: unzip PAR.zip to Melville_PAR_submit.xls
    080815: added to OCB database by Cyndy Chandler, OCB DMO, (cchandler@whoi.edu)
  
 OCB DMO Note: Four worksheets were contained in the original file: Documentation, January, February,
    and Daily_PAR. Contents of January and February files have been combined to create this data set.
    The Documentation and Daily_PAR worksheets are reproduced in the PI note below.  The locaton
    range bounding box above is an estimate.  No location data were reported with the PAR data files.

 PI note: Irradiance data was collected over time periods of 5 seconds to 30 seconds.  In two of the 
    worksheets (January, February), the mean, minimum, maximum, standard deviation, and number of data 
    points is given for each time interval.  
    
 Contact: Mike Hiscock  (hiscock@duke.edu)
          135 Duke Marine Lab Road
          Beaufort, NC  28516   

 Daily PAR summary table of the total daily PAR from sunrise to sunset.  
 There is also an accompanying PDF format file with graphs of PAR vs. time.
 
                Ed(0+) is E(sub)d(0^+)
                Ed(0+) downwelling PAR just above the surface of the
Local Day       ocean, integrated over one day.  (mol quanta m-2 d-1 )
       
1/22/2002       33.9
1/25/2002       47.3
1/26/2002       39.3
1/27/2002       38.4
1/28/2002       17.8
1/29/2002       39.8
1/30/2002       10.5
1/31/2002       22.2
2/01/2002       20.5
2/02/2002       21.4
2/03/2002       14.3
2/04/2002       11.6
2/05/2002       21.0
2/06/2002       18.5
2/07/2002       16.9
2/08/2002       28.6
2/09/2002       15.8
2/10/2002        9.5
2/11/2002       22.1
2/12/2002       36.4
2/13/2002       43.8
2/14/2002       30.9
2/15/2002       18.6
2/16/2002       12.4
2/18/2002       27.2
2/21/2002       23.7

1b:T742,Before he passed away in 1993, John Martin suggested that an increase in the flow of iron-rich dust to the ocean causes phytoplankton (single celled algae) to grow. The increased photosynthesis removes carbon dioxide from surface waters as the algae create biomass. This carbon dioxide is replaced by carbon dioxide gas that flows into the sea from the atmosphere. Reduced carbon dioxide in the atmosphere cools the planet (CO2 is a greenhouse gas that warms the earth). The results of this work, funded by the National Science Foundation, the Department of Energy, and the US Coast Guard, will be a much better understanding of how biological processes may regulate climate. (see Related Info: Fe cycle) A direct test of the 'Martin Hypothesis' that trace concentrations of Fe are responsible for phytoplankton's ability to grow by direct experimental addition of Fe to the surface waters. Consequently the distribution of bioavailable Fe in the surface waters determines large geographical areas primary production and the following flux of fixed organic matter to the deep sea. The aim of the SOFeX project is to investigate the effects of iron fertilization on the productivity of the Southern Ocean. The results of this work will contribute significantly to our understanding of important biogeochemical processes which bear directly on the global carbon cycle, atmospheric carbon dioxide concentration, and climate control. The SOFeX-N and SOFeX-S designations are sometimes used to distinguish between two iron enriched patches - one in low silicate waters north of the polar front (SOFEX-N), and the other in high silicate waters south of the polar front (SOFEX-S). All three ships, Melville (MV), Revelle (RR) and Polar Star (PS), worked in SOFEX-S, but only the Revelle and Melville worked in the SOFeX N patch and shuttled between the two patches.6:["$","$L19",null,{"dataset":{"_id":"2963","description":"

Downwelling photosynthetically active radiation (400 - 700nm, PAR) measured above the surface of the ocean

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\n dates:           20 January 2002 to 21 February 2002  (20020120-20020221) \n location:        N: -52.385  S: -66.611  W: -175.220  E: -166.946 \n \n \n Methodology: Downwelling photosynthetically active radiation (400 - 700nm, PAR) measured \n    above the surface of the ocean -- Ed(0+). Irradiance was measured with a Biospherical \n    Instruments (serial #10127, calibrated 11/1/01) cosine collector mounted on top of the \n    crane hanger on the port side stern quadrant of the R/V Melville.  There was very little, \n    if any, ship-shading at this site.  Additionally, this site was close to the on-deck \n    incubator farm.  \n

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time sampling began (UTC)

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