Publication of a new technical document on water vapor
On July 15, 2026, a new technical document on water vapor was published on the AEMET website, authored and co-authored by several colleagues from Izaña.
It is AEMET Technical Note No. 46, entitled: ‘Estimation of water vapor trends in the troposphere of Tenerife between 1999 and 2024 based on radiosonde data. Correlation with climate indices’.
This study quantitatively characterizes and analyzes the statistical significance of trends in integrated water vapor (IWV) detected in different tropospheric layers, as well as in the total column up to 12 km above Tenerife. The value found for the annual increase of IWV in the total tropospheric column during the day is 0.2–0.3%, although this is not statistically significant at a 95% confidence level. Furthermore, given the relationship between temperature and the hydrological cycle, the correlation of IWV with some climate indices associated with specific temperature anomalies was studied. The Tropical North Atlantic (TNA) Index and the Western Hemisphere Warm Pool (WHWP) Index were determined to be the basic climate indices with the greatest influence on mid-level IWV in the Canary Islands
Link::https://www.aemet.es/es/conocermas/recursos_en_linea/publicaciones_y_estudios/publicaciones/detalles/NT_46_AEMET
