TSG data collected during Tara Oceans expedition (2009-2012) QC validation process and SSS/SST data analysis

• Main Author: Le Goff
• Format: Report
• Language: unknown
• Published: Zenodo 2013
• Subjects: Antarc*; Antarctica
• Online Access: https://doi.org/10.5281/zenodo.376441

The Tara Oceans expedition started in Lorient in September 2009 and ended in the same French harbour in march 2012, crossing a good part of the World Ocean : Mediterranean, Indian Ocean, North and South Atlantic and Pacific Oceans . A thermosalinograph (TSG , Seabird SB45) and a temperature sensor (SBE38) have been recording sea surface temperature (SST) and salinity(SSS) during the whole cruise . 154 hydrographical stations have been achieved along the cruise, providing 675 CTD profiles to a maximum depth of 1000m. The CTD rosette was a Seabird 9plus system with double C and T sensors, which have been regularly factory calibrated during the expedition .CTD profiles have been processed and QC validated by the the LOV team (Laboratoire d’Océanographie de Villefranche) . Details about this validation process appear in references [1],[2],[3]. Raw TSG data (recorded at 0.1 Hz) have been processed using pre and post campaign calibrations;. Those calibrated data have been then filtered and median averaged every 5 mn for the 1rst year (Lorient to Cape town) and every 1mn for the rest of the cruise (Cape Town to Lorient). They have been compared to SSS and SST averaged from surface bins of each CTD profile ( when available) . For those CTD profiles who were validated as significant for intercomparison , TSG data have been corrected from the (CTD-TSG) differences. Through this full process, Quality Controlled (QC) data for SSS and SST have been produced and are presented in this report following a geographical/chronological schedule: Chapter 1: Data processing and analysis from Lorient to Cape Town (2009-2010). Methodology for the 5mn data processing and results. Chapter 2: Data processing and analysis from Cape town to Lorient (2010-2012). New methodology for the 1mn data processing and results for the South Atlantic leg. Chapter 3: Data analysis from Ushuaia to Tahiti, including Antarctica, Patagonian Channels, Galapagos leg and STEFI experiment (Marquises Isl.) Chapter 4: Data analysis from Tahiti to San Diego, ...