We present here side scan sonar datasets and accompanying quicklook seabed images of the Scotia Sea acquired by a GLORIA II (Geological Long Range Inclined Asdic) side scan sonar. The GLORIA instrument was operated on the Royal Research Ship (RRS) Charles Darwin 37 (CD37) research cruise during January - April 1989. The study area was the Scotia Sea, North Scotia Ridge (NSR), South Sandwich Island, South Sandwich Arc, and West Antarctic Peninsula (WAP) continental shelf, within the broader region of the Southern Ocean. Raw data are presented in NetCDF format. These have been pre-processed from the binary pass data using the bas-gloria package (https://github.com/antarctica/bas-gloria). The data have been improved with additional metadata such as latitude, longitude and depth. In addition, "quicklook" seabed images generated from each pass file are provided as PNG images. Cruise tracks from the ship and side scan sonar are presented in CSV format. The cruise was carried out in order to gain a better understanding of the Southern Ocean with a particular focus on: - Tectonic history - Active tectonic processes - Paleoceanography - Stratigraphy - Ice dynamics during glacial intervals This project was funded by BAS under project code B6153: Scotia Sea tectonic evolution and palaeo-circulation.

This dataset contains sea-air methane flux data from January 2019 to March 2021 measured using a Picarro G2311-f greenhouse gas analyser onboard RRS James Clark Ross, in the Southern Ocean, Arctic Ocean and Atlantic Ocean. The fluxes are 2 hour averaged and have been filtered based on wind direction to data corresponding to wind coming from behind the ship to remove sources of pollution from the ship stack. Limit of detection for the flux data are calculated for each cruise by multiplying the standard deviation of the random noise by three. This work was supported by the Natural Environment Research Council and the ARIES Doctoral Training Partnership (grant no. NE/S007334/1). Royal Holloway, University of London was funded by NERC through grants NE/V000780/1 and NE/N016211/1. Anna E. Jones and Katrin Linse were part of the British Antarctic Survey Polar Science for Planet Earth Programme funded by the Natural Environment Research Council (NERC) [NC-Science]. The measurements from the Royal Research Ship James Clark Ross (JCR) were principally supported by the UK Natural Environment Research Council's ORCHESTRA project (Grant No. NE/N018095/1). The Picarro analyser was funded by the European Space Agency funding (ESA AMT4OceanSatFlux project, Grant No. 4000125730/18/NL/FF/gp). This work further contributes to the NERC MOYA project (Grant No. NE/N015932/1).