TITLE = hly0201_poc.dat and hly0203_poc.dat

AUTHOR = Dr N.R. Bates, 
	Bermuda Biological Station for Res. Inc. 
	17 Biological Lane
	St George's GE01
	Bermuda
	Tel: 1-441 297-1880 (x210)
	Fax: 1-441 297-8143
	nick@bbsr.edu
	http://www.bbsr.edu/Labs/co2lab/co2main.html

	Dr D.A. Hansell
	Division of Marine and Atmospheric Chemistry
	Rosenstiel School of Marine and Atmospheric Science
	University of Miami
	4600 Rickenbacker Causeway
	Miami, FL 33149

	Tel: 1-305 361-4078
	Fax 1-305 361-4689
	http://www.rsmas.miami.edu/groups/organic-biogeochem/


DATA CONTACT = Dr N.R. Bates, 
	Bermuda Biological Station for Res. Inc. 
	17 Biological Lane
	St George's GE01
	Bermuda
	Tel: 1-441 297-1880 (x210)
	Fax: 1-441 297-8143
	nick@bbsr.edu
	http://www.bbsr.edu/Labs/co2lab/co2main.html


FUNDING SOURCE AND GRANT NUMBER = OPP-0124868

DATA SET OVERVIEW =
Particulate Organic Carbon and Particulate Organic Nitrogen Data.
-hly0201 are the data for the Spring cruise (8 May 2002 to 12 June 2002)
-hly0203 are the data for the Summer cruise (18 July 2002 to 21 August 2002)

Both cruises were in the Chukchi Sea and Beaufort Sea on board the USCGC Healy.  
Individual data point locations are identified with decimal latitude and 
longitude and depth (m).


INSTRUMENT DESCRIPTION =
Control Equipment Corporation (CEC) 240-XA Elemental Analyzer (Exeter Analytical, Inc.).

References:
-Control Equipment Corporation (1988). The automated and advanced Model 240-XA 
Elemental Analyser. Lowell, MA.
-Gordon, Jr. D.C. (1969). Examination of methods of particulate organic carbon 
analysis.  Deep-Sea research 16:661-665.
-Kerambrun, P. and K.H. Szekielda (1969). Note technique. Tethys 1:581-584.
-Sharp, J.H. (1974).  Improved analysis for "particulate" organic carbon and 
nitrogen from seawater. Limnology and Oceanography 19:984-989.


DATA COLLECTION AND PROCESSING =

Samples were collected at most depth of the service casts.  The POC/PON samples 
were taken approximately 30-60 minutes after the CTD rosette reaches the surface.  
Samples were collected in 4 liter polypropylene bottles.  Each bottle was 
connected via a tubing to a Delrin filter holder connected to a vacuum pump 
system.  Precombusted (450°C, 5 hours) 25mm Whatman GF/F filters (nominal 
pore size 0.7um) were mounted in the filter holders.  The volume filtered varied 
between .25 liter to 4 liter.  Typically, for surface samples, one or 2 liters 
were filtered, and for deep samples 3 to 4 liters.  Filters were placed in 
acid-washed precombusted (450°C, 5 hours) scintillation vials, capped and 
stored frozen (-20°C) before being dried overnight at 65°C to be ready to 
be processed.

The vials were then placed overnight in a desiccator saturated with HCl fumes. 
Thereafter, the filters are dried at 65°C and packed in precombusted 
(900°C, 2 hours) nickel sleeves.

The samples were analyzed on a Control Equipment Corporation (CEC) 240-XA 
Elemental Analyzer.  Sixty-four samples were run at a time on the auto-sampler, 
of which one is a standard, and nine are nickel sleeve blanks.

Acetanilide standard and blanks (empty Ni sleeves) are measured at the beginning 
of each batch run of samples. For each set of samples a minimum of three empty 
filters were also processed as an ordinary sample and analyzed as filter blanks.


DATA FORMAT = The three last columns of the data sets are POC, and PN 
concentrations and quality flag.


DATA REMARKS = In hly0201_poc.dat some sample numbers (column 7) are decimal 
values (eg. 135.67).  For these 12 samples, a volume of 4 liters was filtered 
through 2 or more consecutive filters.  A questionable (Q) flag is applied to 
these data.  Acceptable data have a A flag.


REFERENCES =