10.1594/PANGAEA.919269Aguilera, Victor MVictor MAguilera0000-0001-5791-5250PANGAEA2020carbonate systemEastern Boundary Upwelling SyetmsHumboldt CurrentInter-annual hydrographic variationsIntra-seasonal hydrographic variationsChlorophyll aDEPTH, waterDATE/TIMESea surface temperatureTemperature, waterOxygen, dissolvedSalinitypHCarbon dioxide, partial pressureAlkalinity, totalMultiple investigations2003-03-16T00:00:00/2016-04-16T00:00:00Dataset10.1029/2020JG005704819 data pointstext/tab-separated-valuesCreative Commons Attribution-NonCommercial-NoDerivs 4.0 InternationalHydrographic and carbonate system variations were assessed during El Niño event in a permanent upwelling system of the Humbodt Current (Southeast Pacific Ocean) in 2015-2016 . Ninety nine (99) measurements corresponding to thirty three (33) nearshore surveys conducted in the year-round upwelling system off the Atacama Desert. Temperature and salinity CTD profiles were combined with discrete measurements of pH and total alkalinity, under quality control procedures. All measurements and observations were assessed at 10 m depth.-70.622217-23.460136Antofagasta, Chile