Articles | Volume 8, issue 2
Earth Syst. Sci. Data, 8, 325–340, 2016
Earth Syst. Sci. Data, 8, 325–340, 2016

  15 Aug 2016

15 Aug 2016

A new global interior ocean mapped climatology: the 1° ×  1° GLODAP version 2

Siv K. Lauvset1,2, Robert M. Key3, Are Olsen1,2, Steven van Heuven4, Anton Velo5, Xiaohua Lin3, Carsten Schirnick6, Alex Kozyr7, Toste Tanhua6, Mario Hoppema8, Sara Jutterström9, Reiner Steinfeldt10, Emil Jeansson2, Masao Ishii11, Fiz F. Perez5, Toru Suzuki12, and Sylvain Watelet13 Siv K. Lauvset et al.
  • 1Geophysical Institute, University of Bergen and Bjerknes Centre for Climate Research, Allègaten 70, 5007 Bergen, Norway
  • 2Uni Research Climate, Bjerknes Centre for Climate Research, Allegt. 55, 5007 Bergen, Norway
  • 3Atmospheric and Oceanic Sciences, Princeton University, 300 Forrestal Road, Sayre Hall, Princeton, NJ 08544, USA
  • 4Royal Netherlands Institute for Sea Research (NIOZ), Marine Geology and Chemical Oceanography, P.O. Box 59, 1790 AB Den Burg, the Netherlands
  • 5Instituto de Investigaciones Marinas – CSIC, Eduardo Cabello 6, 36208 Vigo, Spain
  • 6GEOMAR Helmholtz Centre for Ocean Research Kiel, Düsternbrooker Weg 20, 24105 Kiel, Germany
  • 7Carbon Dioxide Information Analysis Center, Environmental Sciences Division, Oak Ridge National Laboratory, U.S. Department of Energy, Building 4500N, Mail Stop 6290, Oak Ridge, TN 37831-6290, USA
  • 8Alfred Wegener Institute Helmholtz Centre for Polar and Marine Research, Bussestrasse 24, 27570 Bremerhaven, Germany
  • 9IVL Swedish Environmental Research Institute, Ascheberggatan 44, 411 33 Gothenburg, Sweden
  • 10University of Bremen, Institute of Environmental Physics, Otto-Hahn-Allee, 28359 Bremen, Germany
  • 11Oceanography and Geochemistry Research Department, Meteorological Research Institute, Japan Meteorological Agency, 1-1 Nagamine, Tsukuba, 305-0052 Japan
  • 12Marine Information Research Center, Japan Hydrographic Association, 1-6-6-6F, Hanedakuko, Otaku, Tokyo, 144-0041 Japan
  • 13Department of Astrophysics, Geophysics and Oceanography, University of Liège, Liège, Belgium

Abstract. We present a mapped climatology (GLODAPv2.2016b) of ocean biogeochemical variables based on the new GLODAP version 2 data product (Olsen et al., 2016; Key et al., 2015), which covers all ocean basins over the years 1972 to 2013. The quality-controlled and internally consistent GLODAPv2 was used to create global 1°  ×  1° mapped climatologies of salinity, temperature, oxygen, nitrate, phosphate, silicate, total dissolved inorganic carbon (TCO2), total alkalinity (TAlk), pH, and CaCO3 saturation states using the Data-Interpolating Variational Analysis (DIVA) mapping method. Improving on maps based on an earlier but similar dataset, GLODAPv1.1, this climatology also covers the Arctic Ocean. Climatologies were created for 33 standard depth surfaces. The conceivably confounding temporal trends in TCO2 and pH due to anthropogenic influence were removed prior to mapping by normalizing these data to the year 2002 using first-order calculations of anthropogenic carbon accumulation rates. We additionally provide maps of accumulated anthropogenic carbon in the year 2002 and of preindustrial TCO2. For all parameters, all data from the full 1972–2013 period were used, including data that did not receive full secondary quality control. The GLODAPv2.2016b global 1°  ×  1° mapped climatologies, including error fields and ancillary information, are available at the GLODAPv2 web page at the Carbon Dioxide Information Analysis Center (CDIAC; doi:10.3334/CDIAC/OTG.NDP093_GLODAPv2).

Short summary
This paper describes the mapped climatologies that are part of the Global Ocean Data Analysis Project Version 2 (GLODAPv2). GLODAPv2 is a uniformly calibrated open ocean data product on inorganic carbon and carbon-relevant variables. Global mapped climatologies of the total dissolved inorganic carbon, total alkalinity, pH, saturation state of calcite and aragonite, anthropogenic carbon, preindustrial carbon content, inorganic macronutrients, oxygen, salinity, and temperature have been created.