BGC-Argo+: Global biogeochemical Argo float data with secondary quality control and derived parameters

Abstract. Biogeochemical Argo floats have quickly become the largest single source of ocean biogeochemical measurements. The vast amount of data collected and the long life-time, typically over 5 years, during which floats measure the ocean makes it challenging to provide consistently quality controlled data. We developed a set of automatic and manual outlier detection methods with a focus on oxygen, nitrate, and pH data that we applied to the 2,429 biogeochemical Argo floats with data available through the global data assembly centers that were deployed as of January 2025. The full biogeochemical dataset, named BGC-Argo+, is a uniform repository of profiles and gridded data to enable easy use of the global dataset for direct observational, mapping, or modeling uses. Data are available through an archived repository or at www.bgc-argo-plus.info, along with information on the outliers removed that should enable future improvements to the global dataset of biogeochemical float measurements.