An updated version of the global interior ocean biogeochemical data product, GLODAPv2.2020

Type Article
Date 2020-12
Language English
Author(s) Olsen AreORCID1, Lange Nico2, Key Robert M.3, Tanhua TosteORCID2, Bittig Henry C.ORCID4, Kozyr Alex5, Álvarez MartaORCID6, Azetsu-Scott Kumiko7, Becker Susan8, Brown Peter J.ORCID9, Carter Brendan R.ORCID10, 11, Cotrim Da Cunha LeticiaORCID12, Feely Richard A.11, Van Heuven StevenORCID13, Hoppema MarioORCID14, Ishii Masao15, Jeansson EmilORCID16, Jutterström Sara17, Landa Camilla S.1, Lauvset Siv K.ORCID16, Michaelis Patrick2, Murata AkihikoORCID18, Pérez Fiz F19, Pfeil Benjamin1, Schirnick CarstenORCID2, Steinfeldt ReinerORCID20, Suzuki Toru21, Tilbrook BronteORCID22, Velo AntonORCID19, Wanninkhof Rik23, Woosley Ryan J.ORCID24
Affiliation(s) 1 : Geophysical Institute, University of Bergen and Bjerknes Centre for Climate Research, Bergen, Norway
2 : GEOMAR Helmholtz Centre for Ocean Research Kiel, Kiel, Germany
3 : Atmospheric and Oceanic Sciences, Princeton University, Princeton, NJ, 08540, USA
4 : Leibniz Institute for Baltic Sea Research Warnemünde, Rostock, Germany
5 : NOAA National Centers for Environmental Information, Silver Spring, MD, USA
6 : Instituto Español de Oceanografía, A Coruña, Spain
7 : Department of Fisheries and Oceans, Bedford Institute of Oceanography, Dartmouth, Nova Scotia, Canada
8 : UC San Diego, Scripps Institution of Oceanography, San Diego, CA 92093, USA
9 : National Oceanography Centre, Southampton, UK
10 : Cooperative Institute for Climate, Ocean and Ecosystem Studies, University of Washington, Seattle, Washington, USA
11 : Pacific Marine Environmental Laboratory, National Oceanic and Atmospheric Administration, Seattle, Washington, USA
12 : Faculdade de Oceanografia/PPG-OCN/LABOQUI, Universidade do Estado do Rio de Janeiro, Rio de Janeiro (RJ), Brazil
13 : Centre for Isotope Research, Faculty of Science and Engineering, University of Groningen, Groningen, the Netherlands
14 : Alfred Wegener Institute Helmholtz Centre for Polar and Marine Research, Bremerhaven, Germany
15 : Oceanography and Geochemistry Research Department, Meteorological Research Institute, Japan Meteorological Agency, Tsukuba, Japan
16 : NORCE Norwegian Research Centre, Bjerknes Centre for Climate Research, Bergen, Norway
17 : IVL Swedish Environmental Research Institute, Gothenburg, Sweden
18 : Research Institute for Global Change, Japan Agency for Marine-Earth Science and Technology, Yokosuka, Japan
19 : Instituto de Investigaciones Marinas, IIM – CSIC, Vigo, Spain
20 : Institute of Environmental Physics, University of Bremen, Bremen, Germany
21 : Marine Information Research Center, Japan Hydrographic Association, Tokyo, Japan
22 : CSIRO Oceans and Atmosphere and Antarctic Climate and Ecosystems Co-operative Research Centre, University of Tasmania, Hobart, Australia
23 : Atlantic Oceanographic and Meteorological Laboratory, National Oceanic and Atmospheric Administration, Miami, USA
24 : Center for Global Change Science, Massachusetts Institute for Technology, Cambridge, Massachusetts, USA
Source Earth System Science Data (1866-3508) (Copernicus GmbH), 2020-12 , Vol. 12 , N. 4 , P. 3653-3678
DOI 10.5194/essd-12-3653-2020

The Global Ocean Data Analysis Project (GLODAP) is a synthesis effort providing regular compilations of surface-to-bottom ocean biogeochemical data, with an emphasis on seawater inorganic carbon chemistry and related variables determined through chemical analysis of seawater samples. GLODAPv2.2020 is an update of the previous version, GLODAPv2.2019. The major changes are data from 106 new cruises added, extension of time coverage to 2019, and the inclusion of available (also for historical cruises) discrete fugacity of CO2 (fCO2) values in the merged product files. GLODAPv2.2020 now includes measurements from more than 1.2 million water samples from the global oceans collected on 946 cruises. The data for the 12 GLODAP core variables (salinity, oxygen, nitrate, silicate, phosphate, dissolved inorganic carbon, total alkalinity, pH, CFC-11, CFC-12, CFC-113, and CCl4) have undergone extensive quality control with a focus on systematic evaluation of bias. The data are available in two formats: (i) as submitted by the data originator but updated to WOCE exchange format and (ii) as a merged data product with adjustments applied to minimize bias. These adjustments were derived by comparing the data from the 106 new cruises with the data from the 840 quality-controlled cruises of the GLODAPv2.2019 data product using crossover analysis. Comparisons to empirical algorithm estimates provided additional context for adjustment decisions; this is new to this version. The adjustments are intended to remove potential biases from errors related to measurement, calibration, and data-handling practices without removing known or likely time trends or variations in the variables evaluated. The compiled and adjusted data product is believed to be consistent to better than 0.005 in salinity, 1 % in oxygen, 2 % in nitrate, 2 % in silicate, 2 % in phosphate, 4 µmol kg−1 in dissolved inorganic carbon, 4 µmol kg−1 in total alkalinity, 0.01–0.02 in pH (depending on region), and 5 % in the halogenated transient tracers. The other variables included in the compilation, such as isotopic tracers and discrete fCO2, were not subjected to bias comparison or adjustments.

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Olsen Are, Lange Nico, Key Robert M., Tanhua Toste, Bittig Henry C., Kozyr Alex, Álvarez Marta, Azetsu-Scott Kumiko, Becker Susan, Brown Peter J., Carter Brendan R., Cotrim Da Cunha Leticia, Feely Richard A., Van Heuven Steven, Hoppema Mario, Ishii Masao, Jeansson Emil, Jutterström Sara, Landa Camilla S., Lauvset Siv K., Michaelis Patrick, Murata Akihiko, Pérez Fiz F, Pfeil Benjamin, Schirnick Carsten, Steinfeldt Reiner, Suzuki Toru, Tilbrook Bronte, Velo Anton, Wanninkhof Rik, Woosley Ryan J. (2020). An updated version of the global interior ocean biogeochemical data product, GLODAPv2.2020. Earth System Science Data, 12(4), 3653-3678. Publisher's official version : , Open Access version :