GEOTRACES: Get the right data!

Measuring concentrations of many constituents at the nano- to picomolar levels in seawater is a difficult challenge, requiring thorough intercalibration between the different laboratories participating to the same programme. GEOTRACES is but one example of a programme that has intercalibration as an essential component of its field-based efforts. The standing GEOTRACES Standards and Intercalibration Committee (S&I) chaired by Greg Cutter was initiated to ensure precision and accuracy throughout the programme’s life. To facilitate consistent sampling and sample handling procedures between cruises and participating laboratories, the S&I Committee in collaboration with the elemental coordinators created a set of written protocols for each suite of trace elements and isotopes. Cutter’s paper emphases on the importance of rigourous intercalibration protocols to get the right data.

13 Cutter
Figure: Participants on the first leg of the 2008 intercalibration cruise in the North Atlantic Ocean abord R/V Knorr

 

Reference:

Gregory A. Cutter (2013), Intercalibration in chemical oceanography-Getting the right number, Limnology and Oceanography-Methods, Volume: 11, p. 418-424 DOI: 10.4319/lom.2013.11.418

Latest highlights

Science Highlights

Surprisingly heavy silicon isotopes in the surface and deep Arctic Ocean

Brzezinski and his colleagues report on a comprehensive study of the Arctic Ocean silicic acid concentrations and silicon isotopic composition…

14.09.2021

Science Highlights

Unique winter dataset of particulate and dissolved cadmium in the Indian sector of the Southern Ocean

Cloete and collaborators analysed particulate and dissolved cadmium at 7 stations in austral winter along a North South section off South Africa.

06.09.2021

Science Highlights

A new proxy for ocean iron bioavailability

The approach established and verified in this study, opens a new way for determining dissolved iron bioavailability in samples across the ocean.

23.07.2021

Science Highlights

Scavenging differentiates the distribution of cadmium, nickel, zinc and copper in the North Pacific Ocean

Zheng and co-authors observed sectional distributions of cadmium, nickel, zinc, and copper in the North Pacific Ocean during three GEOTRACES related cruises…

19.07.2021

Rechercher