trace_metals

 PI:              Kenneth Coale and Ken Johnson
 of:              Moss Landing Marine Laboratory, Calstate
 dataset:         Trace metal concentrations from MLML TM-GoFlo Kevlar casts
 project/cruise:  AESOPS/NBP-97-1 - Ross Sea Process 2 Cruise
 ship:            R/V Nathaniel B. Palmer

 Methodology:  Johnson, K.S., R.M. Gordon and K.H. Coale, 1997.
               What contols dissolved iron concentrations in the worlds ocean?
               Marine Chemistry; 57:137-161

 DMO Note: The event numbers in this data set are NOT arranged in ascending
           order, from beginning to end of cruise, as is normally the case.
           The principal investigators have assembled the data into depth
           descending profiles at nominal geographic locations. As a result, 
	   each profile is a composite of several bottle casts (events).

 PI Notes:  
           leachable particulate = two hour 25% Acetic acid digestion
           refractory particulate = total digestion of remaining material
           

 Parameter             Description                              Units
 
 sta_name              station name, unique station identifier 
                         within AESOPS
 event                 event number from event log
 lat_n                 nominal latitude (negative = south)      decimal degrees
 lon_n                 nominal longitude (negative = west)      decimal degrees
 depth_n               nominal sample depth                     meters
 Al_part_gt0.4_leach   aluminium, particulate gt0.4 microns     nano moles/kilogram
                         in the leachable fraction
 Al_part_gt0.4_refrac  aluminium, particulate gt0.4 microns     nano moles/kilogram 
                         in the refactory fraction
 Al_part_gt0.4_sum     aluminum, particulate gt0.4 microns;     nano moles/kilogram 
                         sum of leach and refactory fractions
 Cd_part_gt0.4_leach   cadmium, particulate gt0.4 microns       pico moles/kilogram
                         in the leachable fraction
 Cd_part_gt0.4_refrac  cadmium, particulate gt0.4 microns       pico moles/kilogram 
                         in the refactory fraction
 Cd_part_gt0.4_sum     cadmium, particulate gt0.4 microns;      pico moles/kilogram 
                         sum of leach and refactory fractions
 Cd_diss_lt0.4         cadmium, dissolved lt0.4 microns         pico moles/kilogram 
 Co_part_gt0.4_leach   cobalt, particulate gt0.4 microns        pico moles/kilogram
                         in the leachable fraction
 Co_part_gt0.4_refrac  cobalt, particulate gt0.4 microns        pico moles/kilogram 
                         in the refactory fraction
 Co_part_gt0.4_sum     cobalt, particulate gt0.4 microns;       pico moles/kilogram 
                         sum of leach and refactory fractions
 Co_diss_lt0.4         cobalt, dissolved lt0.4 microns          pico moles/kilogram 
 Cu_part_gt0.4_leach   copper, particulate gt0.4 microns        nano moles/kilogram
                         in the leachable fraction
 Cu_part_gt0.4_refrac  copper, particulate gt0.4 microns        nano moles/kilogram 
                         in the refactory fraction
 Cu_part_gt0.4_sum     copper, particulate gt0.4 microns;       nano moles/kilogram 
                         sum of leach and refactory fractions
 Cu_diss_lt0.4         copper, dissolved lt0.4 microns          nano moles/kilogram
 Fe_part_gt0.4_leach   iron, particulate gt0.4 microns          nano moles/kilogram
                         in the leachable fraction
 Fe_part_gt0.4_refrac  iron, particulate gt0.4 microns          nano moles/kilogram 
                         in the refactory fraction
 Fe_part_gt0.4_sum     iron, particulate gt0.4 microns;         nano moles/kilogram 
                         sum of leach and refactory fractions
 Fe_diss_lt0.4         iron, dissolved lt0.4 microns            nano moles/kilogram
 Mn_part_gt0.4_leach   manganese, particulate gt0.4 microns     nano moles/kilogram
                         in the leachable fraction
 Mn_part_gt0.4_refrac  manganese, particulate gt0.4 microns     nano moles/kilogram 
                         in the refactory fraction
 Mn_part_gt0.4_sum     manganese, particulate gt0.4 microns;    nano moles/kilogram 
                         sum of leach and refactory fractions
 Mn_diss_lt0.4         manganese, dissolved lt0.4 microns       nano moles/kilogram
 Ni_part_gt0.4_leach   nickel, particulate gt0.4 microns        nano moles/kilogram
                         in the leachable fraction
 Ni_part_gt0.4_refrac  nickel, particulate gt0.4 microns        nano moles/kilogram 
                         in the refactory fraction
 Ni_part_gt0.4_sum     nickel, particulate gt0.4 microns;       nano moles/kilogram 
                         sum of leach and refactory fractions
 Ni_diss_lt0.4         nickel, dissolved lt0.4 microns          nano moles/kilogram
 Zn_part_gt0.4_leach   zinc, particulate gt0.4 microns          nano moles/kilogram
                         in the leachable fraction
 Zn_part_gt0.4_refrac  zinc, particulate gt0.4 microns          nano moles/kilogram 
                         in the refactory fraction   
 Zn_part_gt0.4_sum     zinc, particulate gt0.4 microns;         nano moles/kilogram 
                         sum of leach and refactory fractions
 Zn_diss_lt0.4         zinc, dissolved lt0.4 microns            nano moles/kilogram
 
 nd indicates no data