Raw stable water isotope measurements in water vapour at 8 m a.s.l. on the starboard side of the ship, made in the austral summer of 2016/2017 during the Antarctic Circumnavigation Expedition (ACE). ***** Dataset abstract ***** This dataset includes the raw data of stable water vapour isotope (δ18O, δ2H, deuterium excess) and water vapour mixing ratio measurements at a height of approximately 8 meters above sea level taken in the Southern Ocean during the Antarctic Circumnavigation Expedition (ACE) from November 2016 to April 2017 using a Picarro laser spectrometer L2130-i mounted on the starboard side of the ship. L2130-i was operated only during two months in February and March 2017 from Hobart (Australia) to Cape Town (South Africa). This data has to be calibrated using the calibration runs and applying an appropriate calibration procedure following the IAEA guide lines. Two similar datasets also measuring stable water isotopes (SWIs) in water vapour were collected during the same expedition and can be distinguished from this dataset due to the height of the measurement collection (at 8 m a.s.l and 13.5 m a.s.l). The three ACE datasets of SWIs in water vapour are described and compared in Thurnherr et al. (2020). ***** Original data collection ***** Data were collected using the Picarro laser spectrometer L2130-i and saved directly into comma-separated values (csv) files (see ACE Cruise Report (Walton and Thomas, 2018) and Thurnherr at al. (2020, accepted) for more information on the set-up of the instrumentation). Picarro software was used to collect the data. During the data collection, delta-ratios were automatically calculated by the laser spectrometer using Vienna standard mean ocean water (VSMOW2) as a reference. ***** Quality checking ***** This dataset has not undergone any quality checking. ***** Data processing ***** This dataset has not undergone any post-processing of any kind. ***** Standards ***** The isotope data is handled according to the IAEA reference sheet. ***** Further information for interpreting and using the dataset ***** Filtering: The data should be filtered for cavity variability. If cavity pressure (regulated at 35 torr) and temperature (regulated at 80 degrees C) deviate significantly from the regulated values, the data should be discarded. Timescales: After calibration, the data set is suitable to study meteorological phenomena from 5-minutes up to daily resolution. Interpolation: The data resolution should not be above 5 minutes to avoid memory effects of the inlet. Aggregation to lower temporal resolution: After calibration, the data can be averaged over the anticipated time interval. Depending on the interested geographical extent, the data can be averaged for a resolution of at least one day. It depends on the research question if smaller resolutions are appropriate. - A higher resolution than 5 minutes could include memory effects on the inlet line. - A lower resolution than one day would mean that the averaged value represents a large geographical area. Depending on the research focus, this might be desired or not. The ACE cruise track data can be found with DOI 10.5281/zenodo.3260616. ***** Dataset contents ***** leg*/HIDS2018-yyyymmdd-hhmmssZ-DataLog_User.dat, data file, comma-separated values data_file_header.txt, metadata, text format README.md, metadata, text format ***** Dataset contact ****** Anna Kozachek at the Arctic and Antarctic Research Institute, St Petersburg, Russia. kozachek@aari.ru ***** Dataset license ***** This raw stable water isotope measurements dataset is made available under the Creative Commons Attribution 4.0 International License (CC BY 4.0) whose full description can be found at https://creativecommons.org/licenses/by/4.0/ ***** Dataset citation ***** Please cite this dataset as: Kozachek, A. (2020). Raw stable water isotope measurements in water vapour at 8 m a.s.l. on the starboard side of the ship, made in the austral summer of 2016/2017 during the Antarctic Circumnavigation Expedition. (Version 1.0) [Data set].