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Abstract:
This dataset contains biogeochemical samples analyzed by the Plankton Chemistry Laboratory at the Institute of Marine Research (IMR) from the Barents Sea and Arctic region. Number of surveys and stations visited in the Barents Sea and Arctic has varied over the last 30 years. One major effort is the annual Ecosystem Survey in the fall, with multiple trawl surveys, net tows and CTD water sampling over the course of a month. Additionally, two transects are visited multiple times each year (Fugløya-Bjørnøya and Vardø-Nord). Water samples are also collected during short-term sampling projects (ships of opportunity) from IMR ships visiting the region. Each CTD cast is sampled for dissolved inorganic nutrients (nitrate, nitrite, phosphate, silicate) and phytoplankton pigments (chlorophyll-a, phaeopigments) at predetermined depths and for later analysis at IMR. On occasion, short-term projects have performed Winkler DO titrations and particulate organic carbon and nitrogen (POC, PN) determinations. This unique data set has seen limited use over the years but is a great contribution towards global ocean research and climate change investigations.