Earth System Science Data www.earth-syst-sci-data.net 1866-3508 1866-3516 2 1 2010 10.5194/essd-2-71-2010 http://www.earth-syst-sci-data.net/2/71/2010/ http://www.earth-syst-sci-data.net/2/71/2010/essd-2-71-2010.html http://www.earth-syst-sci-data.net/2/71/2010/essd-2-71-2010.pdf 71 78 2010-02-10 Arctic Ocean data in CARINA S. Jutterström sara.jutterstrom@chem.gu.se L. G. Anderson N. R. Bates R. Bellerby T. Johannessen E. P. Jones R. M. Key X. Lin A. Olsen A. M. Omar Department of Chemistry, University of Gothenburg, Gothenburg, Sweden Bermuda Biological Station for Research Inc., St. George's GE01, Bermuda Bjerknes Centre for Climate Research, UNIFOB AS, Bergen, Norway Geophysical lnstitute, University of Bergen, Bergen, Norway Bedford Institute of Oceanography; Department of Fisheries and Oceans, Dartmouth, Nova Scotia, Canada Atmospheric and Oceanic Sciences Program; Princeton University, Princeton, NJ 08544, USA The paper describes the steps taken for quality controlling chosen parameters within the Arctic Ocean data included in the CARINA data set and checking for offsets between the individual cruises. The evaluated parameters are the inorganic carbon parameters (total dissolved inorganic carbon, total alkalinity and pH), oxygen and nutrients: nitrate, phosphate and silicate. More parameters can be found in the CARINA data product, but were not subject to a secondary quality control. The main method in determining offsets between cruises was regional multi-linear regression, after a first rough basin-wide deep-water estimate of each parameter. Lastly, the results of the secondary quality control are discussed as well as applied adjustments. Dickson, A. G. and Millero, F. J.: A comparison of the equilibrium constants for the dissociation of carbonic acid in seawater media, Deep-Sea Res., 34, 1733–1743, 1987. Jeansson, E., Olsson, K. A., Tanhua, T., and Bullister, J. L.: Nordic Seas and Arctic Ocean CFC data in CARINA, Earth Syst. Sci. Data Discuss., 2, 493–536, 2009. Lewis, E. and Wallace, D. W. R.: Program Developed for CO2 Systems Calculations. ORNL/CDIAC-105, Carbon Dioxide Information Analysis Centre, Oak Ridge National Laboratory, US Department of Energy, Oak Ridge, Tennessee, 1998. Mehrbach, C., Culbertson, C. H., Hawley, J. E., and Pytkowicz, R. M.: Measurement of the apparent dissociation constants of carbonic acid in seawater at atmospheric pressure, Limnol. Oceanogr., 18, 897–907,1973. Olsen, A.: Nordic Seas total dissolved inorganic carbon data in CARINA, Earth Syst. Sci. Data, 1, 35–43, 2009. Olsen, A., Key, R. M., Jeansson, E., Falck, E., Olafsson, J., van Heuven, S., Skjelvan, I., Omar, A. M., Olsson, K. A., Anderson, L. G., Jutterström, S., Rey, F., Johannessen, T., Bellerby, R. G. J., Blindheim, J., Bullister, J. L., Pfeil, B., Lin, X., Kozyr, A., Schirnick, C., Tanhua, T., and Wallace, D. W. R.: Overview of the Nordic Seas CARINA data and salinity measurements, Earth Syst. Sci. Data, 1, 25–34, 2009. Tanhua, T., van Heuven, S., Key, R. M., Velo, A., Olsen, A., and Schirnick, C.: Quality control procedures and methods of the CARINA database, Earth Syst. Sci. Data Discuss., 2, 205–240, 2009. Velo, A., Pérez, F. F., Lin, X., Key, R. M., Tanhua, T., de la Paz, M., van Heuven, S., Jutterström, S., and Ríos, A. F.: CARINA data synthesis project: pH data scale unification and cruise adjustments, Earth Syst. Sci. Data Discuss., 2, 421–475, 2009.