This dataset describes the completeness of radiosonde humidity observations, from the early times until the end of 2016, based on the sounding data of the Integrated Global Radiosonde Archive (IGRA) Version 2 released by the NOAA's National Centers for Environmental Information. The IGRA stations for which we have radiosonde data on at least 5% of the annual soundings (radiosonde and pilot balloon observations) for at least one year were evaluated for every year reported in their periods of record according to specified parameters regarding humidity data in the form of either relative humidity or dewpoint-depression. The dataset is divided in three components: 1) Statistical metadata describing humidity completeness on a yearly basis for each station; 2) Metadata describing humidity completeness in individual observations from the same stations; 3) List of the 1723 stations represented in the whole dataset, including their geographic coordinates, along with metadata providing information on the observing periods for humidity and the corresponding amounts of observations. The accompanying Readme file describes the data format and file contents.

Related Reference: Ferreira, A. P., Nieto, R., and Gimeno, L: Completeness of radiosonde humidity observations based on the Integrated Global Radiosonde Archive, Earth Syst. Sci. Data, 11, 603-627, https://doi.org/10.5194/essd-11-603-2019, 2019.