Dataset: bottle_summ
Deployment: ZHNG09RR

see cruise specific documentation

Methodology: basic hydrographic data; thorium-234, please see published
              references: Buesseler at al. 2001 and Pike et al. 2005

     Buesseler, K. O., C. Benitez-Nelson, Rutgers van der Loeff, M., Andrews, 
     J., Ball, L., Crossin, G., and M. Charette (2001). An intercomparison of
     small- and large-volume techniques for thorium-234 in seawater. Marine      Chemistry, 74, 15-28. (PDF) 
     
     Pike, S.M., K.O. Buesseler, J. Andrews and N. Savoye (2005). Quantification
     of 234Th recovery in small volume sea water samples by inductively coupled
     plasma mass spectrometry. Journal of Radioanalytical and Nuclear       Chemistry, 263(2): 355-360. (PDF) 

 
 Change history:  YYMMDD
   060123: Added by Cyndy Chandler (cchandler@whoi.edu), OCB CDMO; basic 
           hydrographic data from Niskin bottles contributed by Dave Siegel
   060905: remove O2, T, C and derived params from station 20 per Chief Scientist request; 
           sensor caps left on during deployment
   080707: niskin data updated with nutrient and HPLC pigment data from
           Ken Buesseler
   081202: uncalibrated PAR and derived fucox/chla_total ratio removed
   081208: fluorometric chlorophyll a contributed by Sei-ichi Saitoh
          
 DMO note: Thorium 234 data from Niskin bottle samples are available for 
           VERTIGO participants (restricted access).
           
           event, date, time, latitude and longitude are from the CTD cast 
           NMEA header lines; T_local (local time at study area) was computed 
           by adjusting GMT time by +11
           
           As of January 2006, oxygen, fluorescence, turbidity, transmissivity
           and PAR had not yet been compared with in-situ data and should
           be used by others with caution until finalized.

           PIC sensor: voltage 0 - 5: WET Labs PIC 001 (4th build)
           POC sensor: voltage 0 - 5: WET Labs CST-DR 391 - tranmsissometer
           scattering sensor: voltage 0 - 5: Seapoint scattering sensor

           Fluorometric chlorophyll-a data (acquired using standard Turner method)
           were contributed by Se-ichi Saitoh (Hokkaido Univ., Japan) with target 
           (nominal) depths but no Niskin bottle numbers. DMO staff were able to 
           determine most of the Niskin bottle numbers by checking the chl-a 
           sampling records as entered on the origninal sample log sheets. 
           Exceptions and comments are noted below:
           
           cast bot     depth_n chl_a   comments
           6    12      5       0.29    bottles 12 and 14
           6    3       200     0.01    originally reported as cast 8
           18   21      5       0.44    bottles 21 and 24
           28   12      10      0.50    bottle 12 is a guess for 10 m sample
           31   21      5       0.35    bottles 21 and 24
           36   12      10      0.42    bottle 12 is a guess for 10 m sample
           39   22      5       0.33    bottles 22 and 24
           62   21      5       0.30    bottles 21 and 24
           
           and for many casts, according to original paper sample log sheets:
           deepest chl-a sample noted was at 50 m 
           (e.g. deeper samples reported in data file not recorded on sample log sheet)
           
           casts 23 and 76
           sample log sheet noted that sample also taken from bottle 24 at <5 m 
           (but no Turner flourometric chl-a data reported from <5m)
           
           casts 28 and 36
           no Turner flourometric chl-a samples reported on log sheet  
           but chl-a data were reported for Turner flourometric method
 
 PI note: HPLC data are concentrations in ng/L, based on 2 L filtration volume; 
          The -9 values for prasinoxanthin do not indicate zero concentration, 
          but rather inability to quantify (it was co-eluting with another peak).