CITATION: Bates, N.R., Best, M.H.P., and Hansell, D.A., 2006. Suspended Particulate Organic Matter (sPOM) data from Shelf-Basin Interactions (SBI) survey cruises in the Chukchi and Beaufort Seas during 2004. TITLE: Suspended Particulate Organic Matter (sPOM) data from SBI cruises HLY0402 and HLY 0403 AUTHOR: Dr N.R. Bates Bermuda Institute of Ocean Sciences (BIOS) 17 Biological Lane St George's GE01 Bermuda Tel: 1-441 297-1880 (x210) Fax: 1-441 297-8143 Nick.Bates@bbsr.edu http://www.bbsr.edu/Labs/co2lab/co2main.html DATA CONTACT: Dr N.R. Bates Bermuda Institute of Ocean Sciences (BIOS) 17 Biological Lane St George's GE01 Bermuda Tel: 1-441 297-1880 (x210) Fax: 1-441 297-8143 Nick.Bates@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. HLY0402 are the data for the Spring cruise HLY0403 are the data for the Summer cruise 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 methods follow those in Bates et al., 2005. 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 (450ĄC, 5 hours) 25mm Whatman GF/F filters (nominal pore size 0.7um) were mounted in the filter holders. The volume filtered varied between 0.25 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 (450ĄC, 5 hours) scintillation vials, capped and stored frozen (-20ĄC) before being dried overnight at 65ĄC 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 65ĄC and packed in precombusted (900ĄC, 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 four last columns of the data sets are POC concentration, quality flag, PON concentration and quality flag. Columns are: station, cast, bottle, depth, CTD salinity, salinity, SiO4 (”moles kg-1), NO3 (”moles kg- 1), NO2 (”moles kg-1), PO4 (”moles kg-1), POM sample ID, POC (”g L-1), Quality flag, PON (”g L-1), Quality flag. -999 is used to denote no value. DATA REMARKS: Quality flags are 2= Good data; 5= Bad data?; 9= No sample REFERENCES: Bates, N.R., Moran, B., Hansell, D.A., Codispoti, L.A., and Swift, J.R., 2005. Seasonal and spatial distribution of suspended and large aggregate particulate organic matter (POM) in the Chukchi Sea. Deep-Sea Research II, 52, 3324-3323.