Int. j. climatol. Int. j. climatol. Long-term observed changes of air temperature, relative humidity and vapour pressure deficit in Bolivia, 1950–2019 Fernández-Duque B. Vicente-Serrano S. M. Maillard O. Domínguez-Castro F. Peña-Angulo D. Universidad de Zaragoza Noguera I. Azorin-Molina C. Kenawy A. El 2023 research-article