Water samples are collected on a weekly basis, on either Wednesday or Thursday. Samples are taken from the surface waters adjacent to the GSO dock between 9 and 10 am. Chlorophyll concentrations, fluorescence, nutrient (SiO4, NO3, NO2, NH4, and PO4) concentrations, temperature, and salinity are measured for each sample.
The data has been collected since 1976, originally from the MERL headtank and is referred to as "Tank-98" data.
Please note that there are some differences in the types of measurements taken throughout the dataset.
Download MERL T-98 data here. (Data as of 12/19/17; Microsoft Excel Spreadsheet, 271 KB).
(Fluorescence, chlorophyll, temperature, and salinity data to 12/19/17, nutrients data to 12/13/17.)
CHRP Nutrient Dataset
Water samples are collected at 13 stations throughout Narragansett Bay as part of the Coastal Hypoxia Research Program (CHRP). Water samples are analyzed for dissolved inorganic nutrients.
Download the CHRP Nutrient Dataset here. (Updated through 2015; Microsoft Excel Spreadsheet, 740 KB).
Upper Narragansett Bay Benthic Study
Samples of benthic macrofauna are collected at four sites
Sampling: At each site15 replicate cores were hand collected by scuba divers. The core tubes were made of acrylic and measured 30 cm in length and 3.4 cm in diameter. The cores were inserted approximately 15 cm into the sediment and closed at each end with a rubber stopper.
Processing: The top 2 cm of sediment were removed along with any trapped overlying water to analyze separate from the remaining 8 cm. A sub-sample of the 0-2 cm portion was also taken using a 1.2 cm core for enumeration of meiofaunal populations. The samples were preserved in 10% buffered formalin and stained with Rose Bengal dye.
Counting: Each macrofaunal sample was rinsed through
stacked 500 and 300 μm sieves. The meifaunal samples were rinsed through a 37 μm sieve. Organisms retained on the sieves
were identified to species level and enumerated. Reference information for
the identification of common benthic fauna found in
following data are in Microsoft Excel Spreadsheet format. Right click and
"save target as."
Page Updated: December 31, 2017