areal_sum

 PI:              James J. McCarthy
 dataset:         Areal Summary,  daily N-15 uptake rates and f-ratios
 project/cruise:  Arabian Sea/TTN-043 - Process Cruise 1   
 ship:            Thomas Thompson
 
 
 Data and Documentation Revised 09/10/1999

 Note: These data have been revised with new integrations to the
       mixed layer depth or the 1% light depth, which ever is shallower.
 
 Methodology:  McCarthy, J.J., C. Garside, and J.L. Nevins. (1999) Nitrogen
               Dynamics during the Arabian Sea Northeast Monsoon. Deep-Sea
               Research II 46 (1999) 1623-1664.
 
 DMO note: unable to determine more accurate position from event log;
           samples were drawn from the TM rosette sampler, but multiple TM 
           casts were done at most station locations
 
 It is likely the water samples were taken from these casts for these select
 stations at which a single TM cast was done:
 
 event     sta  cast_type  lat      lon      activity_and_comments             person
 -------------------------
 01110736  6    TM         19.8663  65.8663  TM-10___04300602__110m            Lindley          
 01140647  9    TM         17.3000  67.9330  TM-21___04300902_98m;_S.D.=24m    Lindley          
 01160250  12   TM         14.9196  66.8763  TM-25___04301202___98m            Orchardo         
 01191321  15   TM         12.0698  64.9829  TM-33___04301502___84m            Lindley          
 01220735  18   TM         14.8330  64.2499  TM-41___04301802___88m            Lindley          
 01230707  20   TM         15.6331  62.7662  TM-43___04302003___92m            McCarthy    
 
 
 Parameter      Description                                Units

 sta          station number, from event log
 sta_std      Arabian Sea standard station identifier
 lat_n        nominal latitude of station                 decimal degrees
                (minus = south)
 lon_n        nominal longitude of station                decimal degrees
 		(minus = west)
 pNO2         N-15 uptake from nitrite labeled            mMol N /m^2/d
                  substrate		  
 pNO3         N-15 uptake from nitrate labeled            mMol N /m^2/d
                  substrate		  
 pNH4         N-15 uptake from ammomium labeled           mMol N /m^2/d
                  substrate		  		  		  
 f_ratio      f ratio define as follows: 
                  pNO3/(pNO2+pNO3+NH4)