In preparation

  • Irene Montero-Rodríguez, Sánchez-Murillo, R, Corrales-Salazar, L, Esquivel-Hernández, G, Castro-Chacón, L, Rojas-Jiménez, L. D., Vargas-Víquez, J., Ortega, L., Matsumoto, T. [in prep]. Groundwater age and recharge processes in a tropical volcanic aquifer.
  • Benjamin M. C. Fischer, Laura Morillas, Johanna Rojas, Andrea Suárez, Ricardo Sánchez-Murillo, Monika Garcia, Stefano Manzoni, Mark S. Johnson, and Steve W. Lyon. [in prep]. Biochar-amended agriculture in a tropical climate change hot-spot.
  • Christian Birkel, Alicia Correa Barahona, Clément Duvert, Sebastian Granados Bolaños, Andres Chavarría Palma, Ana María Durán-Quesada, Ricardo Sánchez Murillo, Harald Biester. [in prep]. Endmember and Bayesian mixing models consistently evidence near-surface flowpath dominance in a pristine humid tropical rainforest.
  • Christian Birkel Alicia Correa, Marco Martínez, Sebastián Granados , Nelson Venegas, Kenneth Gutiérrez, Sara Blanco, Rafael Quesada, Vanessa Solano, Andres Chavarría, Katherine Vargas Arias, Georgianne Moore, Ana María Durán Quesada, Javier Vásquez Morera, Chris Soulsby, Edgar Espinoza Cisneros, Ricardo Sánchez Murillo. [in prep]. Headwaters drive streamflow and lowlands tracer export in a meso-scale humid tropical catchment.
  • Ricardo Sánchez-Murillo, Germain Esquivel-Hernández, Christian Birkel, Alicia Correa.[in prep]. Tracing water sources in a dynamic tropical environment: from observations to modeling.
  • L. Nicole Arellano, Stephen P. Good, Ricardo Sánchez-Murillo, W. Todd Jarvis, David C. Noone, Catherine E. Finkenbiner. [under review].  Bayesian estimates of the mean recharge elevations of water sources in the Central America region using stable water isotopes. Submitted to Journal of Hydrology.
  • Ricardo Sánchez-Murillo. [in prep]. Urban isotope hydrology in a tropical dynamic environment.

Under review

  • Sánchez-Gutiérrez, R., Villalobos-González, W. [under review]. Analysis of the methodology of economic evaluation for the collection of the environmental fee for discharges in Costa Rica. Submitted to  Repertorio Científico.
  • Sánchez-Gutiérrez, R., Villalobos-González, W. [under review]. Approach to the Modeling Processes of Water Quality in the Middle Catchment of Virilla River. Submitted to Uniciencia.
  • Pérez-Quezadas, J., David Adams, Ricardo Sánchez-Murillo, Alejandro Jiménez-Lagunes, José Luis Rodríguez-Castañeda. [under review]. Isotopic variability (δ18O and δ2H) recorded during rainfall events of the North American Monsoon system across the Sonora River Basin, Mexico. Submitted to the Journal of South America Earth Sciences.
  • Ricardo Sánchez-Murillo, Esquivel-Hernández, G., Corrales-Salazar, et al. [under review]. Tracer hydrology of the data-scarce and heterogeneous Central American Isthmus. Submitted to Hydrological Processes.
  • Correa Alicia, Birkel Christian, Gutiérrez Jason, Dehaspe Joni, Durán-Quesada Ana, Soulsby Chris, Sánchez-Murillo, Ricardo. [under review]. A spatially-distributed assessment of non-stationary green and blue water ages in a pristine tropical rainforest. Submitted to Hydrological Processes.
  • L. Ortega, M. Manzano, J. Rodríguez-Arévalo, R. Sánchez-Murillo. [under review]. Global 222Rn applications in hydrogeology. Submitted to Hydrological Processes.
  • Kevin Carballo-Chaves, Mario Villalobos-Forbes, Germain Esquivel-Hernández, Ricardo Sánchez-Murillo. [under review]. Isotope composition of carbon dioxide and methane in a tropical urban atmosphere. Submitted to Isotopes in Environmental & Health Studies.

Published (2013-2020)


  • Sánchez-Gutiérrez, L. Mena- Rivera, R. Sánchez-Murillo, A. Fonseca-Sánchez, H. Madrigal-Solís. 2020. Groundwater processes and water quality in a human-altered landscape in the Central Pacific coast of Costa Rica. Journal of Geochemistry and Health
  • Leanne L. Chai, Guillermo Hernandez-Ramirez, David S. Hik, Isabel C. Barrio, Carol M. Frost, Cristina Chinchilla Soto, Germain Esquivel-Hernández. 2020. A methane sink in the Central American high elevation páramo: Topographic, soil moisture and vegetation effects. Geoderma, 362, 114092, doi:10.1016/j.geoderma.2019.114092.
  • Sánchez-Gutiérrez, R., Benavides-Benavides, C., Chaves-Villalobos,M., Quiros-Vega, J. 2020. Water quality for human consumption in a rural community: case of Corral de Piedra, Guanacaste, Costa Rica. Tecnología en Marcha, (In Press, Vol 01 2020).


  1. Ramírez-Morales, D., Rodríguez Artavia, B., Sáenz-Vargas, W., Sánchez-Gutiérrez, R., Villalobos-González, W., Mora-Barrantes,J.C. 2019. Artisanal mining for the extraction of gold through the use of mercury: State of the art of environmental impact on water, air and soil. Tecnología en Marcha, 32(3), Pág. 3-11.

  2. Verónica Pinos-Vélez, Germain Esquivel-Hernández, Isabel Cipriani-Avila, Enma  Mora-Abril, Juan Fernando Cisneros, Andrés Alvarado, Victoria Abril-Ulloa. 2019. Emerging Contaminants in Trans-American Waters. Revista Ambiente & Água, 14(6), e2436,  doi:10.4136/ambi-agua.2436.
  3. dos Santos, V., Gastmans, D., Sánchez-Murillo, R., Gozzo, L.F., Batista, L.V., Manzione, R.L. and Martinez, J., 2019. Regional atmospheric dynamics govern interannual and seasonal stable isotope composition in southeastern Brazil. Journal of Hydrology, p.124136.
  4. Niels Munskgaard, Kurita, N.,  Sánchez-Murillo, R., et al. 2019. Tropical daily observations of stable isotope compositions in rainfall and calculated stratiform rainfall fractions.  Scientific Data Nature.
  5. Sánchez-Murillo, R., Ana M. Durán-Quesada, Germain Esquivel-Hernández, Daniela Rojas-Cantillano, Christian Birkel, Doerthe Tetzlaff, Chris Soulsby, Jan Boll, Naoyuki Kurita, and Kim Cobb. [in press]. Deciphering key processes controlling rainfall isotopic variability during extreme tropical cyclones. Nature Communications.
  6. Sebastián Granados; Vanessa Solano; Josie Geris; Liz Brenes; Guillermo Artavia; Guillermo Brenes; Ricardo Sánchez-Murillo; Christian Birkel. 2019. Extreme rainfall impacts on sediment transport dynamics in a steep, pristine and tropical volcanic catchment. CATENA.
  7. Sánchez-Murillo R, Romero-Esquivel, L. G, Jiménez-Antillón J, Salas-Navarro, J., et al. 2019. DOC transport and export in a humid tropical catchment: exploration of new drinking water sources during ENSO-induced droughts. JGR-Biogeosciences.
  8. Esquivel‐Hernández, G, Mosquera, GM, Sánchez‐Murillo, R, et al. Moisture transport and seasonal variations in the stable isotopic composition of rainfall in Central American and Andean Páramo during El Niño conditions (2015–2016). Hydrological Processes. 2019; 1– 16.
  9. Polleth Campos-Arias, Germain Esquivel-Hernández, Jose Francisco Valverde-Calderón, Stephanie Rodríguez-Rosales, Jorge Moya-Zamora, Ricardo Sánchez-Murillo, Jan Boll. 2019. GPS precipitable water vapor estimations over Costa Rica: a comparison against atmospheric sounding and Moderate Resolution Imaging Spectrometer (MODIS). Climate 2019, 7(5), 63;
  10. DE MELO, VIRGINIO FILHO E., R. MOUSSA, Y. LE BISSONNAIS, C. VALENTIN, R. SANCHEZ-MURILLO, C. ROUMET, A. STOKES et al. “Suivi des services écosystémiques dans un observatoire de caféiers agroforestiers. Recommandations pour la filière du café.” Agroforesterie et services écosystémiques en zone tropicale: Recherche de compromis entre services d’approvisionnement et autres services écosystémiques (2019): 37.


  1. Mena-Rivera, L., & Quirós-Vega, J. 2018. Assessment of drinking water suitability in low income rural areas: A case study in Sixaola, Costa Rica. Journal of Water and Health, 16(3), 403-413.
  2. Mena-Rivera, L., Vásquez-Bolaños, O., Gómez-Castro, C., Fonseca-Sánchez, A., Rodríguez-Rodríguez, A., Sánchez-Gutiérrez, R. 2018. Ecosystemic Assessment of Surface Water Quality in the Virilla River: Towards Sanitation Processes in Costa Rica. Water, 10(7), 845.

  3. dos Santos V, Dias de Oliveira M, Boll J, et al. Isotopic composition of precipitation during strong El Niño–Southern Oscillation events in the Southeast Region of Brazil. Hydrological Processes. 2018;1–14.
  4. Sawsan Gamal Abd El Samie and Ricardo Sánchez-Murillo. 2018. Enhancing the Use of Isotope Hydrology in Planning, Management, and Development of Water Resources: Teaching Modules in Environmental Isotope Hydrology for African Countries. International Atomic Energy Agency.
  5. Ricardo Sánchez-Murillo and Ana M. Durán-Quesada. 2018. Stable isotopes in hydrological studies in the tropics: precipitation, groundwater and ecohydrological perspectives in a changing climate. Hydrological Processes.
  6. Jessica Salas-Navarro, Ricardo Sánchez-Murillo, Germain Esquivel-Hernández & José Leonardo Corrales-Salazar (2018) Hydrogeological responses in tropical mountainous springs, Isotopes in Environmental and Health Studies, DOI: 10.1080/10256016.2018.1546701
  7. Esquivel-Hernández, Germain; Sánchez-Murillo, Ricardo; Quesada-Román, Adolfo; Mosquera, Giovanny; Birkel, Christian; Boll, Jan. 2018. Insight into the stable isotopic composition of glacial lakes in a tropical alpine ecosystem: Chirripó, Costa Rica. Hydrological Processes.
  8. Christian Birkel, Rachel Helliwell, Barry Thornton, Sheila Gibbs, Pat Cooper, Chris Soulsby, Doerthe Tetzlaff, Luigi Spezia, Germain Esquivel-Hernández, Ricardo Sánchez-Murillo, Andy Midwood. 2018. Characterization of surface water isoscapes in a heterogeneous environment: The case of Scotland. Geochemical Exploration.
  9. Dehaspe, Joni, Birkel, Christian; Tetzlaff, Doerthe; Sanchez-Murillo, Ricardo; Durán-Quesada, Ana; Soulsby, Chris. 2018. Preliminary tracer-aided modelling elucidates water and isotope transport, storage and mixing in a sparsely monitored pristine, humid tropical catchment. Hydrological Processes.
  10. Welsh, K., Sánchez-Murillo, R., Roupsard, O., and J. Boll. 2018. Seasonal isotope hydrology of a tropical coffee agroforestry watershed: Separating groundwater, springs, and stream flow. Hydrological Processes.
  11. Didier Gastmans, Ricardo Sánchez-Murillo, Ludmila Vianna Batista, Chang, Hung Kiang. 2018. Chemical and isotopic dynamics on surface waters during a prolonged ENSO-related baseflow period in southeastern Brazil. Hydrological Processes.
  12. Sánchez-Murillo, R; Aguirre-Dueñas, E; Gallardo-Améstica, M; Moya-Vega, P; Birkel, C; Esquivel-Hernández, G and Boll, J. 2018. Isotopic Characterization of Waters Across Chile. In Andean Hydrology (Rivera, D, Godoy-Faúndez, A and Lillo-Saavedra, M, Eds). CRC Press, Boca Ratón, FL, USA. pp 205-230.


  1. Mena-Rivera, L., Salgado-Silva, V., Benavides-Benavides, C., Coto-Campos, J.M., & Swinscoe, T.H.A. (2017). Spatial and Seasonal Surface Water Quality Assessment in a Tropical Urban Catchment: Burío River, Costa Rica. Water, 9(8), 558.
  2. Esquivel-Hernández, G., Sánchez-Murillo, R., Birkel, C., and J. Boll. 2017. Climate and water conflicts co-evolution from a tropical development and hydro-climatic perspectives: a case study of Costa Rica. Journal of the American Water Resources Association, 1–20.
  3. Ramírez-Leiva A, Sánchez-Murillo R, Martínez-Cruz M, Calderón H, Esquivel-Hernández G, Delgado V, Birkel, C, Gazel, E, Alvarado-Induni, G, Soulsby, C. 2017. Stable isotopes evidence for recycled subduction fluids in the hydrothermal/volcanic activity across Nicaragua and Costa Rica. Vulcanology and Geothermal Research, 345: 172–183.
  4. Birkel, C., Brenes, A., and Sánchez-Murillo, R. 2017. The Tempisque-Bebedero catchment system: energy-water-food consensus in the seasonally dry tropics of northwestern Costa Rica. In Nexus Outlook “Assessing current and future challenges in the Water, Energy, and Food Security. Eds: Al-Saidi, Mohammad and Lars Ribbe. Nexus Research Focus, TH Köln- University of Applied Sciences.
  5. Esquivel-Hernández, G., Sánchez-Murillo, R., Birkel, C., Good, S., and J. Boll. 2017. Hydro-climatic and ecohydrological resistance/resilience conditions across tropical biomes of Costa Rica. Ecohydrology,
  6. Melitza Crespo-Medina, Katrina I. Twing, Ricardo Sánchez-Murillo, William J. Brazelton, Thomas M. McCollom, Matthew O. Schrenk. 2017. Microbially mediated methane cycling in a tropical serpentinizing environment: the Santa Elena Ophiolite, Costa Rica. Front. Microbiol.,


  1. Sánchez-Murillo, R., Delgado, M., Espinach, D., Lobo, M., Madrigal, F., Morera, A., Rojas, K., et al. 2016. Variación espacial de la composición de 222Rn en los acuíferos Barva y Colima Superior, Costa Rica. Rev. Geol. América Central, 55: 145-163, doi: 10.15517/rgac.v55i0.27072.
  2. Sánchez-Murillo, R., A.M. Durán-Quesada, C. Birkel, G. Esquivel, J. Boll. 2016. Tropical precipitation and d-excess anomalies during El Niño 2014-16. Hydrological Processes Today, Scientific Briefings.
  3. Candel, J., Brooks, E., Sánchez-Murillo, R., Grader, G., & Dijksma, R. 2016. Identifying groundwater recharge connections in the Moscow (USA) sub-basin using isotopic tracers and a soil moisture routing model. Hydrogeology Journal, 1-13.
  4. Sánchez-Murillo, R., and C. Birkel. 2016. Groundwater recharge mechanisms inferred from isoscapes in a complex tropical mountainous region. Geophys. Res. Lett., 43,
  5. Sánchez-Murillo, R,  Esquivel-Hernández G, Sáenz-RosaleS O, Piedra-Marín G, Fonseca-Sánchez A. 2016. Isotopic composition of precipitation and groundwater in the northern mountainous region of the Central Valley, Costa Rica. Isotopes in Environmental and Health Studies,
  6. Sanchez-Murillo, R., Welsh, K., C. Birkel, G. Esquivel-Hernández, J. Corrales-Salazar, J. Boll, E. Brooks, O. Roupsard, O. Sáenz-Rosales, I. Katchan, R. Arce-Mesén, C. Soulsby, L. J. Araguás-Araguás. 2016. Key drivers controlling daily stable isotope variations in precipitation of Costa Rica: Caribbean Sea versus eastern Pacific Ocean moisture sources. Quaternary Science Reviews, 13: 1250-261.
  7. Corrales-Salazar J.L, Sánchez-Murillo R, Esquivel-Hernández G, Herrera E. 2016. Tracking the water fingerprints of Cocos Island: an analysis of isotopic variation in precipitation, surface and groundwater. Int. J. Trop. Biol., 64 (Suppl. 1): S105-S0120.


  1. Germain Esquivel-Hernández, Mario Villalobos-Forbes, Ricardo Sánchez-Murillo,
    Christian Birkel, Juan Valdés-González, Jan Boll. 2015. Near Surface Carbon Dioxide and Methane in Urban Areas of Costa Rica. Air Pollution, 4: 208-223. 10.4236/ojap.2015.44018
  2. Villalobos-González W, Esquivel-Hernández G, Sánchez-Murillo R, Corrales-Salazar J.L. 2015. Analysis of benzene exposure levels of commuters traveling within the metropolitan area of Costa Rica. Air Pollution, 4, 38-46. 10.4236/ojap.2015.41005
  3. Ricardo Sánchez-Murillo, Erin S Brooks, William J Elliot & Jan Boll. 2015. Isotope hydrology and baseflow geochemistry in natural and human-altered watersheds in the Inland Pacific Northwest, USA. Isotopes in Environmental and Health Studies, doi:10.1080/10256016.2015.1008468
  4. Sanchez-Murillo, R., Brooks, E., Elliot W.J., Gazel E., and Boll, J. 2015. Baseflow recession analysis in the inland Pacific Northwest. Hydrogeology Journal, 23 (2): 287-303.
  5. Sánchez-Murillo R., Gazel E., Schwarzenbach E, Crespo-Medina M, Schrenk M, Boll J, and Gill B. 2014. Geochemical evidence for active tropical serpentinization in the Santa Elena Ophiolite, Costa Rica: An analogue of a humid early Earth? Geochemistry, Geophysics, Geosystems.  15,


  1. Sánchez-Murillo R., Brooks E.S., Simpson, L, Boll J., and Wilhelm, F. 2013. Ecohydrological analysis of steelhead (O. mykiss) habitat in an effluent dependent stream in the Pacific Northwest, USA. Ecohydrology,
  2. Sánchez-Murillo, R., G. Esquivel-Hernández, K. Welsh, E.S. Brooks, J. Boll, R. Alfaro-Solís, and J. Valdés-González. 2013. Spatial and temporal variation of stable isotopes in precipitation across Costa Rica: an analysis of historic GNIP records. Modern Hydrology, 3, 226-240, doi: 10.4236/ojmh.2013.34027
  3. Sánchez-Murillo R., Piedra, G., León, S., and Solís, A. 2013. Atlas of chemical and technological hazards of the Great Metropolitan Area of Costa Rica. Uniciencia, 27: 186-214.
  4. Sánchez-Murillo R. 2012. ¿Medicinal Water? The occurrence and fate of pharmaceuticals in aquatic environments. A short communication. Uniciencia, 26 (1): 15-22.
  5. Sánchez-Murillo R. 2011. An analysis of the chemical-technological accidents in the Great Metropolitan Area of Costa Rica between 1998-2005. Uniciencia, 24: 25-33.
  6. Sánchez-Murillo R., León S., Saravia Y., De Mena C. 2010. Total suspended sediments and heavy metals in the Morote River basin, Nicoya, Guanacaste. Universidad Nacional. Heredia, Costa Rica. Uniciencia, 23: 59-65.