CHEMICAL AND ISOTOPIC TRACERS FROM THE ARCTIC OCEAN


Five sets of water column data include bottle salinity, temperature, 
sigma-t, oxygen-18/16 ratios, phosphate, ammonia, silicate, nitrate, 
dissolved oxygen, iodine-129 concentrations, and chlorophyll a. 

Sediment data include plutonium isotope and neptunium concentrations.

One set of biological data includes radionuclide burdens in marine 
mammal tissues donated by subsistence hunters on the North Slope of 
Alaska and in the Resolute region of Canada.

Data were largely collected in the Bering and Chukchi Seas, with some 
coverage for the Beaufort and East Siberian Seas, and with limited 
coverage for other portions of the Arctic Ocean. Data include those 
collected on Alpha Helix cruises 139, 165, 166, 174, 189, 190, 214, 
and 224 between 1990 and 1999. Other data were obtained from cruises 
of the RV OKEAN (1993), Polar Star (1993), Mendeleev (1993), Polar Sea 
(2000), U.S. Canada Arctic Ocean Section (1994), and Polarstern (1993).


Data are tabulated in the following Microsoft Excel spreadsheets:

hx139all_chlorophyll.xls           
Alpha Helix Cruise No. 139 Chlorophyll Data
This Microsoft Excel file gives bottle and water-column integrated 
concentrations of chlorophyll a during a Bering Sea cruise in June, 1990.
Documentation file:
readme_HX139_chlorophyll.doc


HX171chlorophyll_summary.xls       
Alpha Helix Cruise No. 171 Chlorophyll Data
This Microsoft Excel file gives bottle and water-column integrated 
concentrations of chlorophyll a during a Bering Sea cruise in June, 1993.  
Documentation file:
readme_HX171_chlorophyll.doc


HX_177chlorophyll_summary.xls      
Alpha Helix Cruise No. 177 Chlorophyll Data
This Microsoft Excel file gives bottle and water-column integrated 
concentrations of chlorophyll a during a Bering Sea cruise in May-June, 1994. 
Documentation file:
readme_HX177_chlorophyll.doc


HX_224_chlorophyll_summary.xls     
Alpha Helix Cruise No. 224 Chlorophyll Data
This Microsoft Excel file gives bottle and water-column integrated 
concentrations of chlorophyll a during a Bering Sea cruise in September, 1999.
Documentation file:
readme_HX224_chlorophyll.doc


bottle_water_master.xls            
Bottle Water Data
This Microsoft Excel file provides bottle and water-column data for a number 
of different research cruises in the Bering, Chukchi, Beaufort, and East 
Siberian Seas.  This file was revised on December 18, 2001 to incorporate 
updated CDT data.  Chlorophyll data are available for many of these same cruises.
Documentation file:
readme_bottle_water_master.doc


marine_mammal_data.xls             
Arctic Marine Mammal Radionuclide Activities
Radionuclide contaminant burdens in Arctic marine mammals harvested during 
subsistence hunting. 
Documentation file:
readme_mammal_radioisotope.doc


plutoniumneptunium_Dataset.xls     
Arctic Sediment Plutonium Isotope and Neptunium Data
The transuranic elements plutonium and neptunium in arctic marine sediments.
Documentation file:
PuNp_README_FILE.doc