
This gap relates to radiosonde stations, mostly at remote islands, which are gradually diminishing recently. Examples include at least Ascension Island and the W. Tropical Pacific ARM site. A potential closure of Gough Island is also under discussion. No further gap description has been made.
Links
[1] mailto:gaid@gaia-clim.eu?subject=Feedback%20on%20Gap%206.11
[2] http://www.gaia-clim.eu/content-access/public-content