JERICO-NEXT TNA: Intercomparison of instruments for carbonate system measurements (INTERCARBO)

Date 2019-10-03
Temporal extent 2018-11-22 -2018-11-28
Author(s) Laakso Lauri1, Honkanen MarttiORCID1, Kielosto Sami1, 3, Laurila Tuomas1, Mäkelä Timo1, King Andrew2, Sörensen Kai2, Bellerby Richard Garth JamesORCID2, Marty Sabine2, Seppälä Jukka3, Rehder GregorORCID4, Müller Jens DanielORCID4, Le Gall Christian5, Thomas Lena5, Delauney LaurentORCID5, Cantoni CarolinaORCID6, Petersen Wilhelm7, Gehrung Martina7, Bastkowski Frank8
Affiliation(s) 1 : Finnish Meteorological Institute (FMI), Finland
2 : Norwegian Institute for Water Research (NIVA), Norway
3 : Finnish Environment Institute (SYKE), Finland
4 : Leibniz-Institut für Ostseeforschung Warnemünde (IOW), Germany
5 : L'Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER), France
6 : Consiglio Nazionale delle Ricerche - Istituto di Scienze Marine (CNR-ISMAR), Italy
7 : Helmholtz-Zentrum Geesthacht Zentrum für Material- und Küstenforschung GmbH (HZG), Germany
8 : Physikalisch-Technische Bundesanstalt (PTB), Germany
DOI 10.17882/62526
Publisher SEANOE
Keyword(s) JERICO-NEXT, INTERCARBO, pCO2, pH, intercomparison

Continental margins are among the most biologically active areas on Earth. Although they cover only a small portion of the oceans, they contribute up to 15% of ocean primary production, are responsible for over 40% of the total oceanic carbon sequestration and for the vast majority of commercial fisheries.

Carbon fluxes in coastal seas are more complex than those in the open ocean, in part due to high spatiotemporal variability in biological activity and physical processes. In the European coastal areas, complications also rise from the highly variable hydrography: sea surface temperature may vary from below zero degrees on the coast of Spitsbergen up to 30°C in the Mediterranean Sea, while salinity varies from 0 ‰ at the Bothnian Bay, the Baltic Sea, up to more than 38 ‰ in the Mediterranean Sea.

This large variability creates challenges related to instrument accuracy, reliability and maintenance. As there are only a limited number of instruments available for such a highly variable range of environmental conditions, different research groups have often built their own instruments or modified the commercial instruments suitable for their own needs. This has led to a situation which sometimes makes assimilation of the data observed in different areas challenging.

The aim of the INTERCARBO experiment, partly funded by TransNational Access (TNA) of H2020 infrastructure project Joint European Research Infrastructure network for Coastal Observatory – Novel European eXpertise for coastal observaTories (JERICO-NEXT) was to bring together a large number of carbon dioxide partial pressure (pCO2), pH and total alkalinity sensors used on European coastal seas and to compare measurements using different sensors on the same seawater samples.

During the activity, 17 experiments were carried out in three 1 m3 tanks that were filled with seawater that was obtained from Oslofjord. The seawater was manipulated in order to meet predetermined physical and chemical properties. Three salinity conditions (5, 20, and 35 PSU) were generated by introducing fresh water from a local well. Three carbon dioxide target values of approximately 200, 400, and 800 parts per million (ppm) were targeted by equilibrating the water with the corresponding CO2 gases (due to high alkalinity and limited duration of the experiment, these target values were not always reached). The measurements were made on seawater at 10 °C and 20 °C.

This data set presented here contains currently available pCO2 and pH data from the experiment, together with sensor meta data describing the instruments.

Licence CC-BY-NC
Acknowledgements We acknowledge the funding of European Commission’s H2020 Framework Programme under JERICO-NEXT project, grant agreement No. 654410, Trans National Access activity.
File Size Format Processing Access
A single package contains separate folders for each institute/instrument 1 MB rar Processed data Open access
sensor metadata 438 KB PDF Open access
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Laakso Lauri, Honkanen Martti, Kielosto Sami, Laurila Tuomas, Mäkelä Timo, King Andrew, Sörensen Kai, Bellerby Richard Garth James, Marty Sabine, Seppälä Jukka, Rehder Gregor, Müller Jens Daniel, Le Gall Christian, Thomas Lena, Delauney Laurent, Cantoni Carolina, Petersen Wilhelm, Gehrung Martina, Bastkowski Frank (2019). JERICO-NEXT TNA: Intercomparison of instruments for carbonate system measurements (INTERCARBO). SEANOE.