A discrete oceanographic time series including CTDO-casts, measurements of the carbonate chemistry (pH, TA, temperature, salinity), phytoplankton biomass and biological responses of a marine secondary producer. Environmental and biological assesment was conducted during 2015 in a year-round upwelling area of northen Chile (23°S), in the eastern South Pacific. Carbonate chemistry measurements were made according the Best practices in OA, and validated against reference material. A total of 24 surveys were conducted at two main frequencies, 7 days during the first six months and 20 days at the second ones.

Supplement to: Aguilera, Victor M; Escribano, Rubén; Vargas, Cristian A; Gonzáles, M Teresa (2019): Upwelling modulation of functional traits of a dominant planktonic grazer during “warm-acid” El Niño 2015 in a year-round upwelling area of Humboldt Current. PLoS ONE, 14(1), e0209823