Ermita Hernández Heredia, James Beaver, Consuelo Esteves de Jensen, Eric Harmsen, Edda Martínez, Gustavo Rodríguez, Daniel Bair, Roberto Vargas, and José D. Arrocho.  2024. Manual de la Producción del Maíz. Empresa de Hortalizas y Granos Básicos. Universidad de Puerto Rico, Recinto Universitario de Mayagüez, Colegio de Ciencias Agrícolas, Servicio de Extensión Agrícola.

Méndez-Lazaro, P.A., P. Chardón-Maldonado, L. Carrubba, N. Álvarez-Berríos, M. Barreto, J.H. Bowden, W.I. Crespo-Acevedo, E.L. Diaz, L.S. Gardner, G. Gonzalez, G. Guannel, Z. Guido, E.W. Harmsen, A.J. Leinberger, K. McGinley, P.A. Méndez-Lazaro, A.P. Ortiz, R.S. Pulwarty, L.E. Ragster, I.C. Rivera-Collazo, R. Santiago, C. Santos-Burgoa, and I.M. Vila-Biaggi, 2023: Ch. 23. US Caribbean. In: Fifth National Climate Assessment. Crimmins, A.R., C.W. Avery, D.R. Easterling, K.E. Kunkel, B.C. Stewart, and T.K. Maycock, Eds. U.S. Global Change Research Program, Washington, DC, USA. https://doi.org/10.7930/NCA5.2023.CH23

Montoya-Rincon, J.P., Mejia-Manrique, S.A., Azad, S., Ghandehari, M., Harmsen, E.W., Khanbilvardi, R., and Gonzalez-Cruz, J.E. A socio-technical approach for the assessment of critical infrastructure system vulnerability in extreme weather events. Nat Energy (2023). https://doi.org/10.1038/s41560-023-01315-7

Irizarry-Ortiz, M.; Harmsen, E.W. Sensitivity of the Penman–Monteith Reference Evapotranspiration Equation to Meteorological Variables for Puerto Rico. Hydrology 2023, 10, 101. https://doi.org/10.3390/hydrology10050101

Tyson, A.F., E.W. Harmsen, M.J. Laituri, C.S. Stevens-Rumann, 2023. Analyzing Vulnerability by Integrating a Landslide Impact Assessment and Social Vulnerability Index Analysis: A Case Study of the Río Grande de Añasco Watershed Post Hurricane Maria, Proceedings of the Soil Erosion Research under a Changing Climate Symposium, Punta Borinquén Resort, Aguadilla Puerto Rico, USA. January 8-13, 2023, A Specialty Conference of the American Society of Agricultural and Biological Engineers, ASABE Symposium Paper # 23508 DOI: https://doi.org/10.13031/soil.23508

Harmsen E.W., N. López Adames, N. Rivera Maldonado. Gridded Aquifer Recharge Estimates for the Puerto Rico South Coast Aquifer.  Presented at the American Geophysical Union (AGU) 2022 Annual Meeting, Frontiers in Hydrology San Juan, Puerto Rico, June 21, 2022.  University of Puerto Rico, Department of Agricultural and Biosystems Engineering, Mayaguez, PR, United States.

Piasecki M. and E. W. Harmsen (Editors), 2022. Hydrology in the Caribbean Basin-Special Issue.  Hydrology, MDPI.  

Harmsen, E.W.; Mecikalski, J.R.; Reventos, V.J.; Álvarez Pérez, E.; Uwakweh, S.S.; Adorno García, C. Water and Energy Balance Model GOES-PRWEB: Development and Validation. Hydrology 2021, 8, 113. https://doi.org/10.3390/hydrology8030113

Mejia Manrique, S.A.; Harmsen, E.W.; Khanbilvardi, R.M.; González, J.E. Flood Impacts on Critical Infrastructure in a Coastal Floodplain in Western Puerto Rico during Hurricane María. Hydrology 2021, 8, 104. https://doi.org/10.3390/hydrology8030104

Seldon, J., V.A. Snyder , E.W. Harmsen  and S.J. Van Bloem, 2021. Water requirements for growth and survival of Swietenia macrophylla and Tabebuia heterophylla juvenile trees, in relation to water production capacity of dew condensers.  Journal of Agriculture of the University of Puerto Rico, 105(2):143-162, ISSN 0041-994x

Harmsen, E. W. and R. Howard Harmsen, 2019. Agricultural Water Management and Puerto Rico’s Food Insecurity. Special Edition, Journal Ethos Gubernamental.  Sep. 2019. ISSN 1555-8746. Pp. 1-42. (file is 34 MB so it may take a few minutes to download)

John R. Mecikalski and Eric W. Harmsen, 2019. The Use of Visible Geostationary Operational Meteorological Satellite Imagery in Mapping the Water Balance over Puerto Rico for Water Resource Management. In “Satellite Information Classification and Interpretation” edited by Dr. Rustam B. Rustamov. InTech OpenAccess. DOI: 10.5772/intechopen.82460.

Cabrera, I., E. W. Harmsen, and A. Vélez, 2019. The Effect of Shade Houses on the Insect Pests and Yield of Three Important Plant Crops in Puerto Rico: Pepper, Capsicum annuum (Solanaceae), Watermelon, Citrullus lanatus (Cucurbitaceae), and Cabbage, Brassica oleracea (Brassicaceae).  Life: The Excitement of Biology 7(1)5-21.

Harmsen, E. W., 2018. Simple Spreadsheet Method for Scheduling Irrigation. In Technological Innovations in Management of Irrigated Agriculture, Editors: Megh R. Goyal, Susmitha S. Nambuthiri and Richard Koech. Apple Academic Press and CRC Press Taylor & Francis Group. 365p, ISBN: 9781771885928.

Henareh Khalyani, A., W. Gould, E. Harmsen, A. Terando, M. Quinones, and J. Collazo, 2016: Climate change implications for tropical islands: Interpolating and interpreting statistically downscaled GCM projections for management and planning. J. Appl. Meteor. Climatol. Vol. 55:265-282.

Harmsen, E. W., E. Álvarez Pérez, Ada Liz Viches and J. R. Mecikalski. 2016. Estimating Evapotranspiration in the Caribbean Region using an Operational Water and Energy Balance Algorithm. Annual 2016 Meeting of the American Meteorological Society. New Orleans, LA. Presentation Video

Irrigation Scheduling Methods Applicable to the Southern Coast of Puerto Rico, Nov 10, 2015. Eric Harmsen, Irrigation Scheduling Workshop, Salinas, Puerto Rico, Nov 10, 2015

Irrigation Requirements in a Changing Climate YouTube Video Click here (starts on minute 21)

Harmsen, E.W., P. Tosado and J. Mecikalski, 2014. Calibration of Selected Pyranometers and Satellite Derived Solar Radiation in Puerto Rico. Int. J. Renewable Energy Technology, 5(1):43-54.

Presentation: Web Tool For Scheduling Irrigation in the Northern Caribbean Region (PowerPoint), Eric Harmsen and Victor J. Reventos.  Reunión Científica y Asamblea Anual SOPCA, Hormigueros, PR, Nov. 15, 2013. PDF

Presentation:  An Agricultural Application of GOES-PRWEB.  Presented at the 8th Annual NOAA CREST Symposium, The City College of City University of New York, NY, June 5-6, 2013.

Goyal, M.R. and E.W. Harmsen (co-editors), 2013. Evapotranspiration: Principles and Applications for Water Management. Apple Academic Press, Inc., pp 521. Click Here for more Information

Harmsen E.W., 2012.  TECHNICAL NOTE: A Simple Web-Based Method for Scheduling Irrigation in Puerto Rico.  J. Agric. Univ. P.R. 96 (3-4) 2012.

Ramírez-Builes, V. H. and E. W. Harmsen, 2011. Water Vapor Flux in Agroecosystems: Methods and Models Review, published in the book Evapotranspiration edited byLeszek Labedzki, ISBN: 978-953-307-251-7, InTech, Publishing.

Harmsen, E. W., J. Mecikalski, A. Mercado and P. Tosado Cruz, 2010. Estimating evapotranspiration in the Caribbean Region using satellite remote sensing. Proceedings of the AWRA Summer Specialty Conference, Tropical Hydrology and Sustainable Water Resources in a Changing Climate. San Juan, Puerto Rico. August 30-September 1, 2010.

Rojas González, A., E. W. Harmsen, S. Cruz Pol, and Y. De Jesús Arce, 2010 Evaluation of upscaling parameters and their influence on hydrologic predictability in upland tropical areas. Proceedings of the AWRA Summer Specialty Conference, Tropical Hydrology and Sustainable Water Resources in a Changing Climate. San Juan, Puerto Rico. August 30-September 1.

Cardona Soto, M., N. D. Ramirez-Beltran and E. W. Harmsen 2010. Rainfall estimation over Puerto Rico using a classification system and artificial neural networks. Proceedings of the AWRA Summer Specialty Conference, Tropical Hydrology and Sustainable Water Resources in a Changing Climate. San Juan, Puerto Rico. August 30-September 1.

Arocho Meaux, S., A. Mercado-Vargas, G. A. Pablos-Vega, E. W. Harmsen, S. Cruz-Pol and J. Colom Ustáriz, 2010. Calibration and validation of CASA radar rainfall estimation. Proceedings of the AWRA Summer Specialty Conference, Tropical Hydrology and Sustainable Water Resources in a Changing Climate. San Juan, Puerto Rico. August 30-September 1.

Harmsen E. W., J. Mecikalski, P. Tosado Cruz and Ariel Mercado Vargas, 2010. Estimating Evapotranspiration using Satellite Remote Sensing in Puerto Rico, Haiti and the Dominican Republic. PowerPoint Presention given at the 46th Annual Meeting of the Caribbean Food Crops Society, July 12, 2010, Boca Chica, Dominican Republic

Harmsen, E. W., N. L. Miller, N. J. Schlegel and J. E. Gonzalez, 2009. Seasonal Climate Change Impacts on Evapotranspiration, Precipitation Deficit and Crop Yield in Puerto Rico, J. Agricultural Water Management 96(7):1085–1095.

Rojas-González, A. M., E. W. Harmsen and S. Cruz Pol, 2009. Performance evaluation of MPE rainfall product at hourly and daily temporal resolution within a Hydro-Estimator pixel. Transactions on Environment and Development. Vol. 7(5):478-487.

Harmsen, E. W., J. Mecikalski, M. J. Cardona-Soto, A. Rojas Gonzalez and R. Vasquez, 2009. Estimating daily evapotranspiration in Puerto Rico using satellite remote sensing. WSEAS Transactions on Environment and Development. Vol. 6(5):456-465.

Harmsen, E. W., V. H. Ramirez Builes, M. D. Dukes, X. Jia, J. E. Gonzalez And L. R. Pérez Alegía, 2009. A Ground-Based Method for Calibrating Remotely Sensed Surface Temperature for use in Estimating Evapotranspiration. WSEAS TRANSACTIONS on ENVIRONMENT and DEVELOPMENT. Issue 1, Volume 5, January. pp 13-23.

Ramírez-Beltran, N.D, Kuligowski, R.J., Harmsen, E., Castro, J.M., Cruz-Pol, S., Cardona-Soto, M. (2008). Rainfall Estimation from Convective Storms Using the Hydro-Estimator and NEXRAD. WSEAS Transaction on Systems. No. 10, Vol. 7, pp 1016-1027.

Paulino-Paulino, P. J., E. W. Harmsen, D. Sotomayor and L. E. Rivera. 2008. Nitrate leaching under different levels of irrigation for three turfgrasses in southern Puerto Rico.  University of Puerto Rico Journal of Agriculture, 92(3-4)135-152.

Harmsen, E. W., S. E. Gomez Mesa, E. Cabassa, N. D. Ramirez Beltran, S. C. Pol, R. J. Kuligowski ,R. Vasquez, 2008. Satellite Sub-Pixel Rainfall Variability. WSEAS Transactions on Signal Processing. Issue 8, Volume 7, Pages 504-513.

Power Point Presentation: Harmsen, E. W., 2008. Management of Soils under Microirrigation, Training Course: Mantenimiento y Manejo de Sistemas Agrícolas bajo Microriego en Puerto Rico, University of Puerto Rico Agricultural Experiment Station at Juana Díaz, March 6, 2008.

Prieto, M. G., 2007. Development of a regional integrated hydrologic model for a tropical watershed, M.S. Thesis, University of Puerto Rico, Mayagüez Campus.

Ramírez, B.V.H.  (2007).  Plant-Water Relationships for Several Common Bean Genotypes (Phaseolus vulgaris L.) with and Without Drought Stress Conditions.  M.Sc. Thesis, Agronomy and Soils Department, University of Puerto Rico – Mayaguez Campus. 190 pages.

Harmsen, E. W. 2007. The potential impact of climate change on Agriculture in Puerto Rico. Proceedings of the PR Section of the American Society of Agricultural and Biological Engineers Conference: The Innovations in Science & Technology in 2107, May 24, 2007 at Bacardi Corporation, San Juan – Puerto Rico, Paper number: ASABE-PR-2007-02.

Harmsen, E. W., N. L. Miller, N. J. Schlegel and J. E. Gonzalez, 2007.  Downscaled climate change impacts on reference evapotranspiration and rainfall deficit in Puerto Rico. World Environmental and Water Congress 2007, Tampa Florida, May 15-19.

Harmsen, E. W., I. Garcia and A. Rojas, 2007. Rainfall variation in a 4 km x 4 km area in western Puerto Rico. World Environmental and Water Congress 2007, Tampa Florida, May 15-19.

Ramirez, V. H., T. G. Porch and E. W. Harmsen, 2006. Effects of drought on stomatal resistance, surface resistance and leaf temperature in four common bean genotypes (Phaseolus vulgaris L.). Proceedings of the 42nd Annual Meeting of the Caribbean Food Crops Society, July 9-14, 2006, San Juan, Puerto Rico. (in press)

Harmsen, E. W., V. H. Ramirez Builes, J. E. Gonzalez, M. D. Dukes, and X. Jia. 2006. Estimation of Short-Term Actual Crop Evapotranspiration. Proceedings of the 42nd Annual Meeting of the Caribbean Food Crops Society, July 9-14, 2006, San Juan, Puerto Rico. (in press)

Theses from the Department of Agronomy and Soils, University of Puerto Rico—Mayaguez Campus. http://grad.uprm.edu/tesis/tesisagron.htm

Harmsen, E. W., A. Gonzaléz and A. Winter. J. 2004. Re-Evaluation of Pan Evaporation Coefficients at Seven Locations in Puerto Rico. Agric. Univ. P.R. vol. 88, no. 3-4, pp 109-122.

Harmsen, E. W. and A. Gonzaléz, 2005. Technical Note: A Computer Program for Estimating Crop Evapotranspiration in Puerto Rico, J. Agric. Univ. P.R. 89(1-2):107-113.

Carmen Lis Arcelay, 2005. Nitrogen Retention and Movement in a Variable Charge Soil. M.S. Thesis in Soils, University of Puerto Rico, Mayaguez Campus, Mayaguez, PR.

Harmsen, E. W., V. H. Ramirez Builes, J. E. Gonzalez, M. D. Dukes, and X. Jia, 2005. A procedure for measuring short-term actual evapotranspiration.

Harmsen, E. W., R. Díaz and J. Chaparro. 2004. A ground-based procedure for estimating latent heat energy fluxes. Proceedings of the NOAA Educational Partnership Program, Education and Science Forum, New York City, NY, October 21st-23rd.

PowerPoint Presentation: Introduction to the processes controlling the movement of water in soil. E. W. Harmsen. Feb. 2004.

PowerPoint Presentation: Evapotranspiration Studies in Puerto Rico. Harmsen, E. W. and J. E. Harmsen. July, 2004.

PowerPoint Presentation: Ground-based energy flux measurements for calibration of the Advanced Thermal and Land Application Sensor (ATLAS). Harmsen, E. W. and R. Díaz., July 2004.

Harmsen, E. W. 2003. Fifty years of crop evapotranspiration studies in Puerto Rico. Journal of Soil and Water Conservation. July/August, Vol. 58, No. 4, pg. 214-223.

Harmsen, E. W., M. R. Goyal, and S. Torres Justiniano, 2002. Estimating Evapotranspiration in Puerto Rico. J. Agric. Univ. P.R. 86(1-2):35-54.

Harmsen, E. W., J. Colón Trinidad, C. L. Arcelay and D. Cádiz Rodríguez, 2003. Evaluation of percolation and nitrogen leaching from a sweet pepper crop grown on an oxisol soil in Northwest Puerto Rico. Proceedings of the thirty-ninth Anuual Meeting of the Caribbean Food Crop Society. St. George’s, Grenada, July 13 to 18, 2003. Vol. 39.

Arcelay, C. L., M. A. Muñoz and E. W. Harmsen. 2003. Effect of liming and fertigation frequencies on nitrogen retention on Coto Clay. Proceedings of the thirty-ninth Anuual Meeting of the Caribbean Food Crop Society. St. George’s, Grenada, July 13 to 18, 2003.. Vol. 39.

Harmsen, E. W. and H. Parsiani. 2003. Inverse procedure for estimating vertically distributed soil hydraulic parameters using GPR. NOAA-CREST/NASA-EPSCoR Joint Symposium for Climate Studies University of Puerto Rico – Mayagüez Campus. January 10-11, 2003.

Harmsen, E. W., A. González Pérez and A. Winter. 2003. Estimating long-term average monthly evapotranspiration from pan evaporation data at seven locations in Puerto Rico. NOAA-CREST/NASA-EPSCoR Joint Symposium for Climate Studies University of Puerto Rico – Mayagüez Campus. January 10-11, 2003.

Harmsen, E. W. and A.Gonzaléz, 2002. Puerto Rico EvapoTranspiration Estimation Computer Program PR-ET Version 1.0 USER’S MANUAL. Prepared for the University of Puerto Rico Experiment Station-Rio Piedras. Grant SP-347. August 2002.

Harmsen, E. W. 2002. A Simple Procedure for Estimating Evapotranspiration in Tropical Island Environments. Proceedings of the Caribbean Food Crops Society, Thirty Eighth Annual Meeting, 2002. Martinique. Vol. 38.

Harmsen, E. W., J. Colón Trinidad, C. Arcelay and E. Sarmiento Esparra, 2002. Evaluation of the Pan Evaporation Method for Scheduling Irrigation on an Oxisol in Puerto Rico. Proceedings of the Caribbean Food Crops Society, Thirty Eighth Annual Meeting, 2002. Martinique. Vol. 38.

Harmsen, E. W. and S. Torres Justiniano, 2001. Estimating Island-Wide Reference EvapotranspIration for Puerto Rico Using the Penman-Monteith Method. ASAE Paper No. 01-2174. 2001 ASAE Annual International Meeting, Sacramento Convention Center, Sacramento, CA, July 30-August 1.

Harmsen, E. W., J. Caldero and M. R. Goyal, 2001. Consumptive Water Use Estimates for Pumpkin and Onion at Two Locations in Puerto Rico. Proceedings of the Sixth Caribbean Islands Water Resources Congress. Editor: Walter F. Silva Araya. University of Puerto Rico, Mayagüez, PR 00680.

Harmsen, E. W., 1983, “A Portable Chamber to Measure Plant Water Use:  Design Considerations and Analysis,” M.S. Thesis, Michigan State University, East Lansing, MI.

Goyal, M. R., E. A. González, C. Chao de Báez, 1988. Temperature versus elevation relationships for Puerto Rico. J. Agric. UPR 72(3):449-67.

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