Quality controlled ocean temperature and salinity profiles and monthly objective analyses with uncertainty estimates (https://www.metoffice.gov.uk/hadobs/en4/) Simon A. Good, Matthew J. Martin, and Nick A. Rayner https://doi.org/10.1002/2013JC009067

World Ocean Atlas 2013, Volume 4: Dissolved Inorganic Nutrients (phosphate, nitrate, silicate) H. E. Garcia, R. A. Locarnini, T. P. Boyer, J. I. Antonov, O. K. Baranova, M. M. Zweng, J. R. Reagan, and D. R. Johnson https://www.nodc.noaa.gov/OC5/woa13/pubwoa13.html

World Ocean Atlas 2013, Volume 3: Dissolved Oxygen, Apparent Oxygen Utilization, and Oxygen Saturation H. E. Garcia, R. A. Locarnini, T. P. Boyer, J. I. Antonov, O. K. Baranova, M. M. Zweng, J. R. Reagan, and D. R. Johnson https://www.nodc.noaa.gov/OC5/woa13/pubwoa13.html

A global ocean carbon climatology: Results from Global Data Analysis Project (GLODAP) (https://www.ncei.noaa.gov/access/ocean-carbon-data-system/oceans/glodap/) R. M. Key, A. Kozyr, C. L. Sabine, K. Lee, R. Wanninkhof, J. L. Bullister, R. A. Feely, F. J. Millero, C. Mordy, and T.-H. Peng https://doi.org/10.1029/2004GB002247

A 30 years observation-based global monthly gridded sea surface pCO2 product from 1982 through 2011 P. Landsch{\"u}tzer, N. Gruber, N., and D. Bakker https://www.ncei.noaa.gov/access/ocean-carbon-data-system/oceans/SPCO2_1982_2011_ETH_SOM_FFN.html

Carbon-based primary productivity modeling with vertically resolved photoacclimation (http://sites.science.oregonstate.edu/ocean.productivity/) T. Westberry, M. J. Behrenfeld, D. A. Siegel, and E. Boss https://doi.org/10.1029/2007GB003078

Biology and air–sea gas exchange controls on the distribution of carbon isotope ratios (δ13C) in the ocean (https://andreasschmittner.github.io/publications.html) A. Schmittner, N. Gruber, A. C. Mix, R. M. Key, A. Tagliabue, and T. K. Westberry https://doi.org/10.5194/bg-10-5793-2013

Climatological distributions of δ13C of dissolved inorganic carbon in the global oceans. Marie Eide, Are Olsen, Ulysses S. Ninnemann, Tor Eldevik, and Truls Johannessen https://doi.org/10.1594/PANGAEA.872004