Hierro, R. 2025. Observational Evidence of Vertical Drying Over Deforested Amazonia From GPS-RO Data. International Journal of Climatology, e70184 (early view), https://doi.org/10.1002/joc.70184.
Orsi, X., R. Hierro, P. Llamedo, P. Alexander, and A. de la Torre. 2025. Forecasting Intense Radar Reflectivity Using Machine Learning and Deep Learning Algorithms. International Journal of Climatology 45, no. 11: e8919. https://doi.org/10.1002/joc.8919.
Alexander, P., de la Torre, A., Marcos, T., Hierro, R., Kaifler, N., Rhode, S., & Geldenhuys, M. (2025). Self-induced gravity wave attenuation and breaking with generation of secondary modes in the lower mesosphere during two SOUTHTRAC flights above the Andes. Journal of Geophysical Research: Atmospheres, 130, e2024JD042981. https://doi.org/10.1029/2024JD042981
de la Torre, A., Alexander, P., Schmidt, T., Steiner, A. K., Ladstädter, F., Hierro, R., and Llamedo, P.: Signs of climate variability in double tropopause global distribution from radio occultation data, EGUsphere [preprint], https://doi.org/10.5194/egusphere-2024-1654, 2024.
de la Torre, A., Alexander, P., Macros, T., Hierro, R., Llamedo, P., Hormeachea, J. L., y otros, 2023. A spectral rotary analysisof gravity waves: An application during one of the SOUTHTRAC flights. Journal of Geophysical Research: Atmospheres, 128, e2022JD037139. https://doi.org/10.1029/2022JD037139
Alexander, P., de la Torre, A., Llamedo, P., Hierro, R., Marcos, T., Kaifler, B., Kaifler, N., Geldenhuys, M., Giez, A., Rapp, M., y Hormaechea, J. L., 2023. The coexistence of gravity waves from diverse sources during a SOUTHTrac flight, Earth and Space Science Open Archive, p. 52, https://doi.org/10.1002/essoar.10511611.1.
Alexander, P.; Torre, A.; Kaifler, N.; Kaifler, B.; Salvador, J.; Llamedo, P.; Hierro, R.; Hormaechea, J. L., 2020 Temperature profiles from two close lidars and a satellite to infer the structure of a dominant gravity wave. Earth and Space Science, 7, e2020EA001074. https://doi.org/10.1029/2020EA001074
Hierro, R.; Burgos Fonseca, Y.; Ramezani Ziarani, M.; Llamedo, P.; Schmidt, T.; de la Torre, A.; Alexander, P., 2020. On the behavior of rainfall maxima at the eastern Andes, Atmospheric Research, 234, 2020, 104792, ISSN 0169-8095, https://doi.org/10.1016/j.atmosres.2019.104792.
Ramenzani, M.; Bookhagen, B.; Schmidt, T.; J. Wickert; de la Torre, A.; Hierro, R., 2019. Using Convective Available Potential Energy (CAPE) and Dew-Point Temperature to Characterize Rainfall-Extreme Events in the South-Central Andes. Atmosphere 2019, 10, 379. https://doi.org/10.3390/atmos10070379
Hierro, R., P. Llamedo, A. de la Torre y P. Alexander, 2019. The Amazon basin as a moisture source for an Atlantic Walker-type Circulation, Atmospheric Research (216), 160-166, ISSN 0169-8095, https://doi.org/10.1016/j.atmosres.2018.10.009.
Llamedo, P., Salvador, J., Torre, A., Quiroga, J., Alexander, P., Hierro, R., et al. 2019. 11 years of Rayleigh lidar observations of gravity wave activity above the southern tip of South America. Journal of Geophysical Research: Atmospheres, 124, 451– 467. https://doi.org/10.1029/2018JD028673
Hierro, R., A. K. Steiner, A. de la Torre, P. Alexander, P. Llamedo, y P. Cremades, 2018. Orographic and convective gravity waves above the Alps and Andes Mountains during GPS radio occultation events – a case study. Atmospheric and Measurements Technique, 11, 3523-3539, https://doi.org/10.5194/amt-11-3523-2018.
Hierro, R., P. Llamedo, D. Araneo, A. de la Torre and P. Alexander, 2018. GPS RO precipitable water as a possible proxy for rainfall distribution over tropical South America: qualitative analysis. Meteorologic and Atmospheric Physics. https://doi.org/10.1007/s00703-018-0648-8
Burgos Fonseca, Y., P. Alexander, A. de la Torre, R. Hierro, P. LLamedo y A. Calori, 2018. Comparison between GNSS ground-based and GPS radio occultation precipitable water observations over ocean-dominated regions. Atmospheric Research, dx.doi.org/10.1016/j.atmosres.2018.03.017.
de la Torre, A., P. Alexander, T. Schmidt, P. Llamedo y R. Hierro. 2018. On the distortions in calculated GW parameters during slanted atmospheric soundings, Atmospheric and Measurements Technique, 11, 1363-1375, dx.doi.org/10.5194/amt-11-1363-2018.
Llamedo, P., R. Hierro, A. de la Torre y P. Alexander, 2016. ENSO-related moisture and temperature anomalies over South America derived from GPS radio occultation profiles. International Journal of Climatology, dxdoi.org/10.1002/joc.4702.
Hierro, R., P. Llamedo, A. de la Torre y P. Alexander, 2016. Spatiotemporal structures of rainfall over the Amazon basin derived from TRMM data. International Journal of Climatology, 36, (3), 1565–1574, dx.doi.org/10.1002/joc.4429
Alexander, P., A. de la Torre, R. Hierro y P. Llamedo, 2016. An improvement of the sensitivity of GPS radio occultation data to detect gravity waves through observational and modeling factors, Advances in Space Research, 57, (2), 543-551, dx.doi.org/10.1016/j.asr.2015.10.047.
Alexander, P., A. de la Torre, T. Schmidt, P. Llamedo y R. Hierro, 2015. Limb sounders tracking topographic gravity wave activity from the stratosphere to the ionosphere around midlatitude Andes, Journal of Geophysical Research (Space Physics), 120, 9014–9022, doi:10.1002/2015JA021409.
de la Torre, A., H. Pessano, R. Hierro, R. Santos, P. Llamedo y P. Alexander, 2015. The influence of topography on vertical velocity of air in relation to severe storms near the Southern Andes Mountains, Atmospheric Research, 156, 91-101. dx.doi.org/10.1016/j.atmosres.2014.12.020.
Alexander, P., A. de la Torre, R. Hierro y P. Llamedo, 2014. Assessment of precision in ionospheric electron density profiles retrieved by GPS radio occultations. Advances in Space Research , 54, 11, 1 2249-2258, ISSN 0273-1177, dx.doi.org/10.1016/j.asr.2014.08.029.
Alexander, P., A. de la Torre, P. Llamedo, y R. Hierro, 2014. Precision estimation in temperature and refractivity profiles retrieved by GPS radio occultations, Journal of Geophysical Research (Atmosphere), 119,8624–8638, dx.doi.org/10.1002/2013JD021016.
de la Torre, A., P. Alexander, P. Llamedo, R. Hierro, B. Nava, S. Radicella, T. Schmidt, y J. Wickert, 2014. Wave activity at ionospheric heights above the Andes Mountains detected from FORMOSAT-3/COSMIC GPS radio occultation data, Journal of Geophysical Research (Space Physics), 119, 2046–2051, dx.doi.org/10.1002/2013ja018870
García-Ortega, E., Hermida, L., Hierro, R., Merino, A., Gascón, E., Fernández-González, S., Sánchez, J. L. y López, L., 2014. Anomalies, trends and variability in atmospheric fields related to hailstorms in north-eastern Spain. International Journal of Climatology, 34: 3251–3263. dx.doi.org/10.1002/joc.3910
Hierro, R., P. Llamedo, A. de la Torre, y P. Alexander, 2013. Oscillation modes of humidity over the Amazon basin derived from GPS RO profiles. Journal of Geophysical Research (Atmosphere), 118, 13,121-13,127, dx.doi.org/10.1002/2013JD020758
Hierro, R., H. Pessano, P. Llamedo, A. de la Torre, P. Alexander y A. Odiard, 2013. Orographic effects related to deep convection events over the Andes region. Atmospheric Research, 120–121, 216-225, dx.doi.org/10.1016/j.atmosres.2012.08.020
Hierro, R., P. Llamedo, A. de la Torre, P. Alexander y A. Rolla, 2012. Climatological patterns over South America derived from GPS RO data. Journal of Geophysical Research (Atmosphere), 117, D03116, dx.doi.org/10.1029/2011JD016413.
de la Torre, A., P. Alexander, R. Hierro, P. Llamedo, A. Rolla, T. Schmidt y J. Wickert, 2012. Large Amplitude Gravity Waves above the Southern Andes, the Drake Passage and the Antarctic Peninsula. Journal of Geophysical Research (Atmosphere), 117, D02106, dx.doi.org/10.1029/2011JD016377
de la Torre, A., R. Hierro, P. Llamedo, A. Rolla y P. Alexander, 2011. Severe Hail storms near Southern Andes in the Presence of Mountain Waves. Atmospheric Research, 101, (1-2), 112-123, dx.doi.org/10.1016/j.atmosres.2011.01.015
Alexander, P., A. de la Torre, P. Llamedo, R. Hierro, T. Schmidt, A. Haser y J. Wickert, 2011. A method to improve the determination of wave perturbations close to the tropopause by using a digital filter. Atmospheric Measurements and Techniques, 4, 1777-1784, dx.doi.org/10.5194/amt-4-1777-2011
Ulke, A. G., K. Longo, S. R. Freitas y R. F. Hierro, 2007. Regional pollution due to biomass burning in South America. Ciência e Natura, 10, 201-204. ISSN 2179-460X, ISSN 0100-8307.
