Dataset Open Access

Quality-checked meteorological data from the Southern Ocean collected during the Antarctic Circumnavigation Expedition from December 2016 to April 2017.

Landwehr, Sebastian; Thomas, Jenny; Gorodetskaya, Irina; Thurnherr, Iris; Robinson, Charlotte; Schmale, Julia

Contact person(s)
Landwehr, Sebastian; Thomas, Jenny
Data collector(s)
Veledin, Victor
Data curator(s)
Landwehr, Sebastian
Data manager(s)
Thomas, Jenny
Researcher(s)
Landwehr, Sebastian; Thomas, Jenny; Gorodetskaya, Irina; Thurnherr, Iris; Robinson, Charlotte; Schmale, Julia

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/

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.
Files (45.2 MB)
Name Size
ACE_filtered_meteorological_data_1min.csv
md5:8cf14afea3e6fe33f5b1b0ce921d73c0
45.0 MB Download
ace_verified_meteorological_data_change_log.txt
md5:07d2be0d7e9dfe24e7ded5b4af28b627
425 Bytes Download
data_file_header.txt
md5:8ce786ee54191f2541a4a6b088e03aec
5.3 kB Download
diff_TA1_TA3_WDR2_5min.png
md5:8c89ca1a6e0908946507de47cd6e3cad
70.8 kB Download
ratio_SR1_SR3_solangle_5min.png
md5:5681303afb9ca28c64acf1b5f6be2d49
70.9 kB Download
README.txt
md5:1e4ac544b66ac78cbd218702e052232a
30.7 kB Download
  • 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): 2267–69. https://doi.org/10.1175/JAMC-D-11-0143.1.

241
431
views
downloads
All versions This version
Views 241224
Downloads 431408
Data volume 8.8 GB8.3 GB
Unique views 208192
Unique downloads 171163

Share

Cite as