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***** Dataset abstract ***** A Vaisala MAWS240 meteorological station was installed on the R/V Akademik Tryoshnikov during a circumnavigation of Antarctica in the austral summer season of 2016/2017. This dataset contains the raw meteorological data that have been extracted from the original raw text data files. Air temperature, relative humidity, dew point, solar radiation, ultraviolet radiation, cloud level and sky cover were recorded with a resolution of 30 seconds. Averaged wind parameter data are provided. Date_time should be combined with TIMEDIFF to convert it to UTC. Latitude and longitude recorded are not corrected. Underway seawater measurements were recorded as null values. Data from this dataset have been corrected and quality-checked in another published dataset. We recommend these data for further use (Landwehr et al., 2019; DOI 10.5281/zenodo.3379590). ***** Dataset contents ***** - metdata_all_YYYYMMDD_YYYYMMDD.csv, data file, comma-separated values - data_file_header, metadata, text format - README.txt, metadata, text format Data files contain data for each leg of the Antarctic Circumnavigation Expedition (ACE). Dates included in the file name are the start and end dates of the legs and therefore the data within the files as well. ***** Dataset license***** This raw meteorological dataset is made available under the Creative Commons Attribution 4.0 International License (CC BY 4.0) whose full text can be found at https://creativecommons.org/licenses/by/4.0/ {"references": ["Landwehr, Sebastian, Thomas, Jenny, Gorodetskaya, Irina, Thurnherr, Iris, Robinson, Charlotte, & Schmale, Julia. (2019). Quality-checked meteorological data from the Southern Ocean collected during the Antarctic Circumnavigation Expedition from December 2016 to April 2017. (Version 1.1) [Data set]. Zenodo. http://doi.org/10.5281/zenodo.3379590", "Pina Estany, Carles, & Thomas, Jenny. (2019). Raw meteorological dataset from the Southern Ocean collected on board the Antarctic Circumnavigation Expedition (ACE) during the austral summer of 2016/2017. (Version 1.0) [Data set]. Zenodo. http://doi.org/10.5281/zenodo.3465817", "Pina Estany, Carles, & Thomas, Jenny. (2020). Summary raw wind data from the Southern Ocean collected on board the Antarctic Circumnavigation Expedition (ACE) during the austral summer of 2016/2017. (Version 1.0) [Data set]. Zenodo. http://doi.org/10.5281/zenodo.3719310", "David W H Walton, & Jenny Thomas. (2018, November 22). Cruise Report - Antarctic Circumnavigation Expedition (ACE) 20th December 2016 - 19th March 2017 (Version 1.0). Zenodo. http://doi.org/10.5281/zenodo.1443511"]} The Antarctic Circumnavigation Expedition was made possible by funding from the Swiss Polar Institute and Ferring Pharmaceuticals.

Dataset abstract This dataset contains quality-checked meteorological observations of air temperature, relative humidity, dew point, barometric pressure and observations of downwelling solar radiation and ultraviolet radiation. Further it contains the wind speed and direction relative to the ship but not corrected for air-flow distortion, and translated into the earth reference frame. For each of these variables observations are available from a portside and starboard side sensor. The dataset also contains, cloud base height and sky cover at three levels measured with a Ceilometer. As additional information the solar azimuth and altitude angle have been calculated for the ship’s position every five minutes and have been added as a one-minute time series using the nearest value. The ship’s position, heading, course and speed over ground are also provided. The wind speed measurements were made at a height of approximately 30.5 meters above sea level. The measurement height of the temperature and humidity probes is 23.7 meters above sea level. The barometric pressure was measured at 20 meters above sea level. The observations have been screened for implausible values and on some occasions despiking based on visual inspection and a rolling interquartile range filter have been applied. Solar radiation measurements are affected by shadowing of the ship, and the air temperature and humidity by the heating of air that passes over the ship. Masks are provided to flag affected observations. The wind speed readings are affected by airflow distortion and should be used with consideration until a dataset of corrected wind speeds is published. More details on airflow distortion can be requested from the contact person. Dataset contents ACE_filtered_meteorological_data_1min.csv, data file, comma-separated values diff_TA1_TA3_WDR2_5min_1.png, metadata, portable network graphics ratio_SR1_SR3_solangle_5min_1.png, metadata, portable network graphics data_file_header.txt, metadata, text README.txt, metadata, text ace_filtered_meteorological_data_change_log.txt, metadata, text Change log v1.1 - The range check for skycover (SC) and cloudlevel (CL) was added to the quality-checking routines. 53 data points violated the range check for these variables: these have now been marked as NaN. v1.0 - Initial release of verified meteorological data. Dataset license This meteorological 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/ {"references": ["Smith, Shawn R., Mark A. Bourassa, and Ryan J. Sharp. Establishing More Truth in True Winds. JOURNAL OF ATMOSPHERIC AND OCEANIC TECHNOLOGY 16 (1999): 14.", "Stull, Roland. Wet-Bulb Temperature from Relative Humidity and Air Temperature. 2011. Journal of Applied Meteorology and Climatology 50, no. 11 (9 September 2011): 2267\u201369. https://doi.org/10.1175/JAMC-D-11-0143.1."]} The Antarctic Circumnavigation Expedition was made possible by funding from the Swiss Polar Institute and Ferring Pharmaceuticals. Antarctic Circumnavigation Expedition – Delivering Added value To Antarctica (ACE-DATA) is funded by the Swiss Data Science Center as Project number 17-02.

***** Dataset abstract ***** A Vaisala MAWS240 meteorological station was installed on the R/V Akademik Tryoshnikov during a circumnavigation of Antarctica in the austral summer season of 2016/2017. This dataset contains the raw text files of meteorology data collected in the Southern Ocean as part of the Antarctic Circumnavigation Expedition (ACE). Data files have undergone no processing or quality-checking and are as-recorded, directly from the instrumentation. Wind speed and direction parameters were recorded with a resolution of three seconds. Air temperature, relative humidity, dew point, solar radiation, ultraviolet radiation, cloud level and sky cover were recorded with a resolution of 30 seconds. Time of the measurement should be used with the TIMEDIFF to convert it to UTC. Latitude and longitude recorded are not corrected. Underway seawater measurements were recorded as null values. ***** Dataset contents ***** - MAWS__SMSAWS__YYYYMMDD.txt, data file, ASCII tab-separated - data_file_header, metadata, text format - README.txt, metadata, text format Data files contain data for one day and are named by that date. Null values are recorded as ///, // or / ***** Dataset license ***** This raw meteorological dataset is made available under the Creative Commons Attribution 4.0 International License (CC BY 4.0) whose full text can be found at https://creativecommons.org/licenses/by/4.0/ The Antarctic Circumnavigation Expedition was made possible by funding from the Swiss Polar Institute and Ferring Pharmaceuticals.

The international Antarctic Circumnavigation Expedition (ACE), organised by the Swiss Polar Institute (SPI), took place in the austral summer of 2016 / 17. Departing from Cape Town in December 2016, the R/V Akademik Tryoshnikov sailed around the Southern Ocean, navigating the following route: Cape Town (20 December 2016) - Hobart (18 January 2017) via: Marion Island Iles de Crozet et Kerguelen Heard Island Hobart (22 January 2017) - Punta Arenas (22 February 2017) via: Mertz glacier Balleny Islands Mount Siple Scott Island Peter I Island Diego Ramírez Punta Arenas (26 February 2017) - Cape Town (19 March 2017) via: South Georgia South Sandwich Islands Bouvetøya Scientists from 22 distinct projects studied a wide range of disciplines, collecting data and samples from the Southern Ocean and a number of terrestrial sites on islands around Antarctica, as well as the continent itself. In this cruise report, the full details of the purpose of the cruise, on-board data and sample collection, and project methods and preliminary results are described. This document is compiled and edited from reports provided by many scientists from 22 distinct on-board projects who studied a wide range of disciplines, collecting data and samples from the atmosphere, the Southern Ocean and a number of terrestrial sites on islands around Antarctica, as well as the continent itself. The expedition was made possible by funding from the Swiss Polar Institute and Ferring Pharmaceuticals.