Surface underway measurements of partial pressure (or fugacity) of carbon dioxide, salinity and water temperature collected during the time series vessel Tara race cruise legs 5, 6, 7, 8 and 9 of the project AtlantECO mission microbiome in the Atlantic Ocean from 2021-08-19 to 2021-11-25 (NCEI Accession 0304238)

This dataset includes surface underway measurements of partial pressure (or fugacity) of carbon dioxide, salinity and water temperature collected during the time series vessel Tara race cruise legs 5, 6, 7, 8 and 9 of the project AtlantECO mission microbiome in the Atlantic Ocean from 2021-08-19 to 2021-11-25. This dataset is very coastal, with very strong gradients observed on the continental plateau and in the very interesting Amazon River Ocean Continuum. Most of the dataset has been quality checked with discrete samples of DIC and TA. The strongly positive values of fCO2 (generating warnings in SOCAT) are in the Amazon River. We acknowledge that this dataset might need a more experience 'quality checker' as it is in a tricky area, it is not the standard GO system and might not follow perfectly the cookbook (on temperature and pressure for example). However we have done several quality check of the dataset, with underway samples, and looked at the dataset in depth, regionally, and we really believe the data to be good.