Guidi, Lionel; Gattuso, Jean-Pierre; Pesant, Stephane; Tara Oceans Consortium, Coordinators; Tara Oceans Expedition, Participants (2017): Environmental context of all samples from the Tara Oceans Expedition (2009-2013), about carbonate chemistry in the targeted environmental feature [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.875567,

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In: Tara Oceans Consortium, Coordinators; Tara Oceans Expedition, Participants (2017): Registry of all samples from the Tara Oceans Expedition (2009-2013) [dataset publication series]. PANGAEA, https://doi.org/10.1594/PANGAEA.875582

The Tara Oceans Expedition (2009-2013) sampled the world oceans on board a 36 m long schooner, collecting environmental data and organisms from viruses to planktonic metazoans for later analyses using modern sequencing and state-of-the-art imaging technologies. Tara Oceans Data are particularly suited to study the genetic, morphological and functional diversity of plankton. The present data set provides environmental context to all samples from the Tara Oceans Expedition (2009-2013), about carbonate chemistry in the targeted environmental feature. Total alkalinity (AT) and total carbon (CT) were measured potentiometrically (Edmond 1970), and other carbonate chemistry parameters (pH on total scale, CO2, pCO2, fCO2, HCO3, CO3, OmegaAragonite and OmegaCalcite) were calculated using seacarb (Nisumaa et al. 2010). For each parameter we provide six statistics about all observations that are considered adequate to characterise the targeted environmental feature: number of observations, minimum, first quartile (25 percentile), median, third quartile (75 percentile), and maximum values. Observations were considered adequate if they met the following criteria: <100 km from the sampling location, <2 days from the sampling date/time, and within 10 m of the sampling depth. We also provide the computed distance and date/time lags that were assessed against these criteria. No environmental context is provided when one of these criteria was not met.