An updated version of the global interior ocean biogeochemical data product, GLODAPv2.2021
| Type | Article | ||||||||||||||||||||
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| Date | 2021-12 | ||||||||||||||||||||
| Language | English | ||||||||||||||||||||
| Author(s) | Lauvset Siv K. 1, Lange Nico2, Tanhua Toste2, Bittig Henry C.3, Olsen Are4, 5, Kozyr Alex6, Alvarez Marta7, Becker Susan8, Brown Peter J.9, Carter Brendan R.10, 11, Da Cunha Leticia Cotrim12, Feely Richard A.11, Van Heuven Steven13, Hoppema Mario14, Ishii Masao15, Jeansson Emil1, Jutterstrom Sara16, Jones Steve D.4, 5, Karlsen Maren K.4, 5, Lo Monaco Claire17, Michaelis Patrick2, Murata Akihiko18, Perez Fiz F.19, Pfeil Benjamin16, Schirnick Carsten2, Steinfeldt Reiner20, Suzuki Toru21, Tilbrook Bronte22, 23, Velo Anton19, Wanninkhof Rik24, Woosley Ryan J.25, Key Robert M.26 |
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| Affiliation(s) | 1 : NORCE Norwegian Res Ctr, Bjerknes Ctr Climate Res, Bergen, Norway. 2 : GEOMAR Helmholtz Ctr Ocean Res Kiel, Kiel, Germany. 3 : Leibniz Inst Baltic Sea Res Warnemunde, Rostock, Germany. 4 : Univ Bergen, Geophys Inst, Bergen, Norway. 5 : Bjerknes Ctr Climate Res, Bergen, Norway. 6 : NOAA, Natl Ctr Environm Informat, Silver Spring, ,USA. 7 : IEO CSIC, Inst Espanol Oceanog, La Coruna, Spain. 8 : Univ Calif San Diego, Scripps Inst Oceanog, San Diego, CA 92093 ,USA. 9 : Natl Oceanog Ctr, Southampton, Hants, England. 10 : Univ Washington, Cooperat Inst Climate Ocean & Ecosyst Studies, Seattle, WA, USA. 11 : NOAA, Pacific Marine Environm Lab, 7600 Sand Point Way Ne, Seattle, WA 98115 ,USA. 12 : Univ Estado Rio de Janeiro, Fac Oceanog, PPG Oceanog, Rio De Janeiro, RJ, Brazil. 13 : Univ Groningen, Fac Sci & Engn, Ctr Isotope Res, Groningen, Netherlands. 14 : Helmholtz Ctr Polar & Marine Res, Alfred Wegener Inst, Bremerhaven, Germany. 15 : Japan Meteorol Agcy, Meteorol Res Inst, Tsukuba, Ibaraki, Japan. 16 : IVL Swedish Environm Res Inst, Gothenburg, Sweden. 17 : Sorbonne Univ, LOCEAN, Paris, France. 18 : Japan Agcy Marine Earth Sci & Technol, Res Inst Global Change, Yokosuka, Kanagawa, Japan. 19 : IIM CSIC, Inst Invest Marinas, Vigo, Spain. 20 : Univ Bremen, Inst Environm Phys, Bremen, Germany. 21 : Japan Hydrog Assoc, Marine Informat Res Ctr, Tokyo, Japan. 22 : CSIRO, Oceans & Atmosphere, Hobart, Tas, Australia. 23 : Univ Tasmania, Australian Antarctic Program Partnership, Hobart, Tas, Australia. 24 : NOAA, Atlantic Oceanog & Meteorol Lab, Miami, FL 33149, USA. 25 : MIT, Ctr Global Change Sci, Cambridge, MA USA. 26 : Princeton Univ, Atmospher & Ocean Sci, Princeton, NJ 08540, USA. |
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| Source | Earth System Science Data (1866-3508) (Copernicus Gesellschaft Mbh), 2021-12 , Vol. 13 , N. 12 , P. 5565-5589 | ||||||||||||||||||||
| DOI | 10.5194/essd-13-5565-2021 | ||||||||||||||||||||
| WOS© Times Cited | 54 | ||||||||||||||||||||
| Abstract | The Global Ocean Data Analysis Project (GLODAP) is a synthesis effort providing regular compilations of surface-to-bottom ocean biogeochemical bottle data, with an emphasis on seawater inorganic carbon chemistry and related variables determined through chemical analysis of seawater samples. GLODAPv2.2021 is an update of the previous version, GLODAPv2.2020 (Olsen et al., 2020). The major changes are as follows: data from 43 new cruises were added, data coverage was extended until 2020, all data with missing temperatures were removed, and a digital object identifier (DOI) was included for each cruise in the product files. In addition, a number of minor corrections to GLODAPv2.2020 data were performed. GLODAPv2.2021 includes measurements from more than 1.3 million water samples from the global oceans collected on 989 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 World Ocean Circulation Experiment (WOCE) exchange format and (ii) as a merged data product with adjustments applied to minimize bias. For this annual update, adjustments for the 43 new cruises were derived by comparing those data with the data from the 946 quality controlled cruises in the GLODAPv2.2020 data product using crossover analysis. Comparisons to estimates of nutrients and ocean CO2 chemistry based on empirical algorithms provided additional context for adjustment decisions in 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 with to better than 0.005 in salinity, 1% in oxygen, 2% in nitrate, 2% in silicate, 2% in phosphate, 4 mu mol kg(-1) in dissolved inorganic carbon, 4 mu mol 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 CO2 fugacity (fCO(2)), were not subjected to bias comparison or adjustments. The original data, their documentation, and DOI codes are available at the Ocean Carbon Data System of NOAA NCEI (https://www.ncei.noaa.gov/access/ocean-carbon-data-system/oceans/GLODAPv2_2021/, last access: 7 July 2021). This site also provides access to the merged data product, which is provided as a single global file and as four regional ones - the Arctic, Atlantic, Indian, and Pacific oceans - under https://doi.org/10.25921/ttgq-n825 (Lauvset et al., 2021). These bias-adjusted product files also include significant ancillary and approximated data and can be accessed via https://www.glodap.info (last access: 29 June 2021). These were obtained by interpolation of, or calculation from, measured data. This living data update documents the GLODAPv2.2021 methods and provides a broad overview of the secondary quality control procedures and results. | ||||||||||||||||||||
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