Dataset abstract This dataset contains high resolution records of sky irradiance over photosynthetically active radiation wavelengths (PAR; 400-700 nm) recorded shipboard during the Antarctic Circumnavigation Expedition (ACE) Leg 1-3. A hemispherical PAR sensor was fixed to the bow of the RV Akademik Tryoshnikov ship at approximately 2 metres height above the main deck and continuously recorded the irradiance over PAR wavelengths (400-700 nm) at 1 minute intervals from 21st December 2016 to the 16th March 2017. This data provides high resolution information on the diel cycle in sky irradiance and absolute sky irradiance over PAR wavelengths (400-700 nm) along the ship track of the ACE expedition. Dataset contents README.txt, metadata, text data_file_header.txt, metadata, text ace_par_20200526CURRSGCMR.csv, data file, comma-separated values

{"references": ["Thomas, Jenny, & Pina Estany, Carles. (2019). Quality-checked, one-minute resolution cruise track of the Antarctic Circumnavigation Expedition (ACE) undertaken during the austral summer of 2016/2017. (Version 1,0) [Data set]. Zenodo. http://doi.org/10.5281/zenodo.3483166", "Walton, D. W. H & Thomas, J. 2018. Cruise Report - Antarctic Circumnavigation Expedition (ACE) 20th December 2016 - 19th March 2017. Swiss Polar Institute, EPFL, Lausanne, Switzerland, 380 pages. DOI: 10.5281/zenodo.1443511"]}

The Antarctic Circumnavigation Expedition was made possible by funding from the Swiss Polar Institute and Ferring Pharmaceuticals. This research was partially supported by the Australian Government through the Australian Research Council's Discovery Projects funding scheme (project DP160103387), a South African CSIR Parliamentary Grant (SNA2011112600001) and the CSIR Southern Ocean Carbon and Climate Observatory (SOCCO) programme.