6. Acknowledgements
The authors would like to thank the administration and park rangers of the Chirripó National Park (Costa Rican National System of Conservation Areas, SINAC) for their valuable help with the collection of daily precipitation samples and weekly surface water samples; the access to the research site; and the logistical support. GEH and RSM. also thank the Research Office of the National University of Costa Rica through Grants SIA‐0482‐13 and SIA‐0101‐14, and the support by the International Atomic Energy Agency Grant CRP‐19747 under the initiative “Stable isotopes in precipitation and paleoclimatic archives in tropical areas to improve regional hydrological and climatic impact models”.