Underway measurements of O2/Ar ratio and O2 concentration in the North Atlantic and at the Western Antarctic Peninsula

Dataset of underway measurements of O2/Ar ratio and O2 concentration in the North Atlantic and at the Western Antarctic Peninsula

This dataset contains underway measurements of O2/Ar ratio and oxygen concentration collected from North Atlantic cruises (Bermuda_2015, Bermuda_2016, Bermuda_2017) and at the Western Antarctic Peninsula (LTER_2012).  Underway temperature and salinity were measured via thermosalinographs on the ships’ flow-through systems. The continuous measurements of O2/Ar were conducted by equilibrator inlet mass spectrometry (EIMS) (Cassar et al. 2009). Underway total O2 was measured using an Aanderaa optode sensor and calibrated by discrete Winkler titrations samples. The underway data were 8-minute averaged to account for the EIMS response time.

For more details, see methodology and cruise information in the following relevant publications:

Bermuda_2015: Wang et al. (2018); doi.org/10.1038/s41396-018-0163-4
Bermuda_2016 and Bermuda_2017:  Tang et al. (2019); doi.org/10.1038/s41467-019-08640-0
LTER_2012: Eveleth et al. (2017); doi.org/10.1016/j.dsr2.2016.05.002

Correspondence: nicolas.cassar@duke.edu
Creation date: 16 Dec 2021

Reference:

Eveleth, R., Cassar, N., Doney, S. C., Munro, D. R., and Sweeney, C. (2017). Biological and physical controls on O2/Ar, Ar and pCO2 variability at the Western Antarctic Peninsula and in the Drake Passage, Deep Sea Research Part II: Topical Studies in Oceanography, 139, 77-88. https://doi.org/10.1016/j.dsr2.2016.05.002
Tang, W., Wang, S., Fonseca-Batista, D., Dehairs, F., Gifford, S., et al. (2019). Revisiting the distribution of oceanic N2 fixation and estimating diazotrophic contribution to marine production, Nature Communications, 10(1), 831. https://doi.org/10.1038/s41467-019-08640-0
Wang, S., Lin, Y., Gifford, S., Eveleth, R., and Cassar, N. (2018). Linking patterns of net community production and marine microbial community structure in the western North Atlantic, The ISME Journal, 12(11), 2582-2595. https://doi.org/10.1038/s41396-018-0163-4
Cassar, N., Barnett, B. A., Bender, M. L., Kaiser, J., Hamme, R. C., Tilbrook, B. 2009. Continuous high-frequency dissolved O2/Ar measurements by Equilibrator Inlet Mass Spectrometry (EIMS). Analytical Chemistry 81(5): 1855-1864.