GNSS radio occultation infilling of the African radiosonde data gaps reveals drivers of tropopause climate variability T Ding, JL Awange, B Scherllin‐Pirscher, M Kuhn, Khandu, R Anyah, ... Journal of Geophysical Research: Atmospheres 127 (17), e2022JD036648, 2022 | 6 | 2022 |