TITLE: Readme- HLY0402-JOSSMaster P.I.(S): Jackie Grebmeier/Lee Cooper 10515 Research Dr. Suite 100, Bldg. A Marine Biochemistry & Ecology Dept. of Ecology & Evolutionary Biology University of Tennessee, Knoxville Knoxville, TN 37932 tel: +1 865.974.2592 or +1 865.974.2990 fax: +1 865.974.7896 email: jgrebmei@utk.edu or lcooper1@utk.edu website: http://arctic.bio.utk.edu and http://sbi.utk.edu FUNDING SOURCE/GRANT NUMBER: NSF OPP0125082 DATASET OVERVIEW: This dataset contains measurements of benthic parameters, including bottom water temperature and salinity, bottom water chlorophyll-a concentrations, integrated water column chlorophyll-a, sediment chlorophyll-a present in surface sediments, benthic faunal parameters (abundance, biomass (g/m2), biomass (gC/m2), number of taxa), sediment grain size, total organic carbon (TOC), total organic nitrogen (TON), carbon/nitrogen (C/N), and sediment respiration oxygen uptake rates (O2UR). Data included in this dataset were collected during sampling from May 15 - June 23, 2004 from the United States Coast Guard Icebreaker Healy (WAGB-20). This sampling on Healy was funded through the Shelf-Basin Interactions SBI)project, which is funded by both the National Science Foundation and the Office of Naval Research. INSTRUMENT DESCRIPTION: All water samples were collected using a rosette bottle system on a CTD. A van Veen grab (0.1 m2 sediment grab), weighted with 32 kg of lead was used in the collection of many surface sediment samples and fauna. All sediment grain size samples were collected from van Van grabs. Fauna were collected on 1 mm sieve mesh and preserved in 10% buffered formalin. TOC, TON, and C/N samples were also taken from van Veen grabs. A multi (4 barrel) HAPS corer (each core = 0.0133 m2) was used to collect sediment cores, which were used for sediment metabolism (respiration) measurements, as well as many surface sediment analyses. While the coring system provides less disturbed surface sediments, high levels of bioturbation in these continental shelf sediments tend to homogenize the sediments rapidly and there are often no significant differences in surface sediment parameters obtained using the van Veen grab versus the HAPS coring system. (See Cooper L. W., I. L. Larsen, T. M. Beasley, S. S. Dolvin, J. M. Grebmeier, J. M. Kelley, M. Scott, and A. Johnson-Pyrtle (1998), The distribution of radiocesium and plutonium in sea ice- entrained Arctic sediments in relation to potential sources and sinks, Journal of Environmental Radioactivity, 39, 279-303 and Pirtle-Levy, R. S. (2006), A SHELF-TO-BASIN EXAMINATION OF FOOD SUPPLY FOR ARCTIC BENTHIC MACROFAUNA AND THE POTENTIAL BIASES OF SAMPLING METHODOLOGY. M.S. Thesis, University of Tennessee, Knoxville For more information on the HAPS core, see: Kanneworff, E. & Nicolaisen, W. The "HAPS:" A frame supported bottom corer. Ophelia Supplement 10, 119-129 (1973). Commercial sources include Ocean Test Equipment (http://www.oceantestequip.com/seafloorsamp.html) and KC Denmark (http://www.kc-denmark.dk/public_html/p6.htm) DATA FORMAT File Names (Formats): HLY0402-JOSSMaster.txt (Tab delimited text file) HLY0402-JOSSMaster.xls (MS XL 5.1/02 file) Naming Convention: CruiseName-"JOSS"Variable.filetype (ex. HLY0402-JOSSO-18.txt) Data Format and Layout: Ship - HLY: "Healy", USCG Icebreaker WAGB-20 Year - 04 : year, 2004 Cruise# - 02 : cruise number for the ship for that year Station# - sequentially numbered from beginning to end of cruise Station Name - based on transect names, the lower the number the less the depth HV : Herald Valley WHS : West Hanna Shoal EHS : East Hanna Shoal BC : Barrow Canyon EB : East Barrow Lat., Long., Date/Time - self-explanatory Depth - bottom depth in meters Cast# - CTD cast from which samples were taken, matches JOSS event log Bottle - CTD bottle from which samples were taken Bottle Depth - depth at which bottle was tripped Bot Temp - temp of bottom water (¡C) Bot Sal - salinity of bottom water (psu) Bot Oxygen - dissolved oxygen of bottom water (ml/l) Bot Chl-a - chlorophyll concentration of bottom water (mg/m3) Integrated Chl-a - chlorophyll concentration integrated throughout the water column (mg/m3) Sed Chl-a - concentration of chlorophyll in surface sediments (~0-3 cm layer) (mg Chl/m2) Abundance - number of benthic fauna per m2 (no/m2) Biomass (g/m2) Ð formalin wet weight grams of benthic biomass per m2 Biomass (gC/m2) Ðdry weight grams of benthic fauna in carbon units per m2 obtained by multiplying g wet wt b benthic biomass by carbon conversion values, The carbon conversion numbers used for benthic organismsfollowed the methods of Stoker (1978) and Grebmeier et al. 1989: Stoker, S. W. (1978), Benthic invertebrate macrofauna of the eastern continental shelf of the Bering/Chukchi Seas., Ph.D. thesis, University of Alaska Fairbanks. Grebmeier, J. M., Howard M. Feder and C. Peter McRoy (1989), Pelagic-benthic coupling on the shelf of the northern Bering and Chukchi Seas. II. Benthic community structure, Marine Ecology Progress Series, 51, 253-268. Taxa# - number of benthic taxa per m2 Sed modal size - median surface sediment grain size phi class Sed Phi size- percent of surface sediment grain size fraction, 0 phi- largest, 5 phi-smallest TOC Ð surface sediment total organic carbon (mg/g)[is this correct, or is it %] TON Ð surface sedimenttotal organic nitrogen (mg/g) C/N Ð surface sediment carbon-to-nitrogen ratio O2UR - sediment oxygen uptake rate (mmol O2/m2/d) s.d. - standard deviation of two O2UR experiment Data Version Number and Date: Version 1, month/date/year: 8/24/04Software Compatibility: This dataset is made available here as a Microsoft Excel 5.1/02 file and as a tab-delimited text file. Check whether the values are mg/g or precented as % (look at UCSB spreadsheets for answer