SO-WISE South Atlantic Ocean and Indian Ocean Observational Constraints

• Main Authors: Jones, Dani, Zhou, Shenjie
• Format: Dataset
• Language: English
• Published: 2022
• Subjects: oceanography; Southern Ocean; South Atlantic Ocean; Indian; Weddell; Sea ice
• Online Access: https://zenodo.org/record/7468656; https://doi.org/10.5281/zenodo.7468656

This dataset contains an initial set of curated and processed oceanographic observations collected as part of a joint effort between the EU SO-CHIC project and a UKRI Future Leaders Fellowship. It is partly intended to be used as a set of observational constraints for a Weddell Gyre region state estimate, although it can be used for more general analysis purposes as well. It has been used as part of an unsupervised clustering analysis [see Jones (2022) for software and Jones and Zhou (2022) for labelled dataset, see references]. Overall spatial and temporal coverage Latitude: 85°S-30°S Longitude: 65°W-80°E Time: 1974-2020 Contents CPOM_SSH: sea-ice corrected sea surface height CTD: temperature and salinity profiles from ship-based CTD casts FLOATS: temperature and salinity profiles from Argo floats SEALS: temperature and salinity profiles from seal-mounted profilers Stress_and_EKE: sea-ice corrected surface stress and EKE XBT: temperature and salinity profiles from expendable bathythermographs (XBTs) Profile quality control We only consider profiles with good position and time flags, as well as good temperature, salinity, and pressure measurements with good flags. Duplicated profiles are identified when multiple profiles are found within 24 hours over the same 2 km x 2 km grid cell, and only one profile within the spatio-temporal window is used. We then used the MITprof toolbox (Forget, G., 2017) to pre-process the selected profiles, re-gridding them onto 72 standard pressure levels; the vertical interval varies from 20 dbar at the surface to 100 dbar in the deep ocean. SSH processing SSH data is sea-ice corrected version provided by the Centre for Polar Observation and Modelling (CPOM) in the UK. It is composed by two satellite missions, Envisat (2004/05-2012/03) and Cryosat-2 (2010/07-2020/04). The data is available in montly along-track format. A gaussian 300km filter, ±3 std outliner removal and 0.5x0.25 deg interpolation is applied to grid the data. Intersatellite offset is removed using the overlapped ...